Doctor Profile

Roger Härtl
MD

Roger Härtl
MD

Weill Cornell Medicine and NewYork-Presbyterian
240 E 59th Street
New York, NY 10022

New York

New York (NY)

Contact Contact Roger Härtl
T: 212-746-2152
F: 212-746-8387

Visit: weillcornellbrainandspine.org
Neurological Surgery

Neurological Surgery

Languages Spoken: English, German, Italian

Profile

Roger Härtl, M.D., is Professor of Neurological Surgery and Director of Spinal Surgery and Neurotrauma at the Weill Cornell Brain and Spine Center in New York, and the Director of the Weill Cornell Medicine Center for Comprehensive Spine Care. He also serves as the official neurosurgeon for the New York Giants Football Team.

Dr. Härtl's clinical interest focuses on simple and complex spine surgery for degenerative conditions, tumors and trauma as well as biological approaches for disc repair and regeneration. He is a world-renowned pioneer and leader in minimally invasive spinal surgery and computer-assisted spinal navigation surgery. He is actively involved in improving neurosurgical care in developing countries as the leader of Weill Cornell's Global Health Neurosurgery Initiative in Tanzania.

Together with the Biomedical Engineering Department at Cornell University in Ithaca, Dr. Härtl is currently investigating new tissue-engineering techniques for the repair and regeneration of degenerated spinal discs, the most common cause of back and neck pain.

Dr. Härtl, the neurosurgeon for the New York Giants, has lectured and published extensively on the surgical treatment of spine disorders, traumatic brain injury, and spinal cord injury.  He is also actively involved in improving neurosurgical care in developing countries and is the leader of Weill Cornell Medicine's Global Health Neurosurgery initiative in Tanzania.

In order to achieve the very best in patient outcomes, Dr. Härtl's practice emphasizes an interdisciplinary approach to disease processes and he works very closely with other specialists such as neurologists, pain specialists, sports medicine doctors and physical therapists. His patients come from all over the globe and include many physicians, surgeons and even other neurological and spine surgeons. He has been repeatedly named to the lists of New York Super Doctors, America's Top Surgeons, and America's Best Doctors, and has been included on the list of New York’s Best Doctors in New York magazine.

He has authored more than 200 scholarly articles in peer-reviewed journals and is the editor of two books on minimally invasive spinal surgery and biological disc repair and regeneration.

Dr. Härtl has provided commentary for numerous television shows on ABC, NBC, and CBS in addition to national radio shows. His expertise has been sought through interviews in the New York Times, The New York Post, The New York Daily News, and other media outlets. 

Dr. Härtl received his M.D. from the Ludwig-Maximillians University in Munich, Germany. In 1994 Dr. Härtl came to the Weill Cornell Medical College as a post-doctoral research fellow in the Department of Surgery and the Brain Trauma Foundation to pursue research in traumatic brain and spinal cord injury. He completed another fellowship in neurocritical care at the Charite Hospital of the Humboldt University in Berlin, Germany, followed by a surgical internship and residency at Allegheny General Hospital in Pittsburgh, Pennsylvania. He completed his neurosurgery residency at NewYork-Presbyterian/Weill Cornell Medical Center and Memorial Sloan-Kettering Cancer Center, after which he pursued specialized training in complex spine surgery at the Barrow's Neurological Institute in Phoenix under Dr. Volker Sonntag. In 2004 Dr. Härtl returned to re-join the Department of Neurosurgery at Weill Cornell Medical College.

Dr. Härtl's scientific interest focuses on clinical and basic science research surrounding innovative and less invasive surgical and biological treatment strategies for degenerative diseases of the spine.

Together with the Biomedical Engineering Department at Cornell he is working on tissue-engineering techniques for the repair and regeneration of degenerated spinal discs, the most common cause of back and neck pain. Dr. Härtl has lectured and published extensively on the surgical treatment of spinal disorders, and neurotrauma. He is a leader in the application of evidence-based medicine to neurosurgery and worked with the Brain Trauma Foundation in New York on the development of treatment guidelines for the medical and surgical management of head injury that are now used worldwide.

Published In:

New York Super Doctors 2020
New York Super Doctors 2019
New York Super Doctors 2018
New York Super Doctors 2017
New York Super Doctors 2016
New York Super Doctors 2015
New York Super Doctors 2014
New York Super Doctors 2013
New York Super Doctors 2012

About Roger Härtl

Medical School: Ludwig-Maximilians University, Munich

Graduation Year: 1993

Professional Webpage: weillcornellbrainandspine.org/faculty/roger-h%C3%A4rtl-md

Honors and Awards:

Daedalus Fund for Innovation of Weill Cornell Medicine 7/2019
“Total Disc Replacement using Tissue Engineered Intervertebral Discs in the Porcine Cervical Spine”

Best Paper 2018 Award 5/2019
“Degenerative Lumbar Spine Disease: Estimating Global Incidence and Worldwide Volume” 8th Annual Global Spine Congress (GSC)

Charles Kuntz Scholar Award 3/2019
“Retrospective Review of Immediate Restoration of Lordosis in Single-level Minimally Invasive Transforaminal Lumbar Interbody Fusion (MI-TLIF): A Comparison of Static and Expandable Interbody Cages” Joint Section on Disorders of the Spine and Peripheral Nerves (DSPN)


WCMC Areas of Concentration (AOC) Program 6/2018
Certificate of Excellence Award - MOI TBI Project

Stewart B. Dunsker, MD Award 1/2018
“Mesenchymal Stem Cell-Seeded High-Density Collagen Gel For Annular Repair: In Vivo Sheep Study”
American Association of Neurological Surgeons Annual Meeting (AANS)

Charles Kuntz Scholar Award 1/2018
“Mesenchymal Stem Cell-Seeded High-Density Collagen Gel For Annular Repair: 6 Week Results From In Vivo Sheep Models”
Joint Section on Disorders of the Spine and Peripheral Nerves (DSPN)

Neurosurgery Top Spine & Peripheral Nerve Paper of the Year Award 10/2017
“Lumbar Spinal Stenosis Associated With Degenerative Lumbar Spondylolisthesis: A Systematic Review and Meta-Analysis of Secondary Fusion Rates Following Open vs. Minimally Invasive Decompression”
Congress of Neurological Surgeons Annual Meeting (CNS)

2017 Humes Visiting Professorship 7/2017

Castle Connolly America’s Top Doctors 2017

New York Magazine: Best Doctors 2017

Charles Kuntz Scholar Award 3/2017
“Biomechanical Evaluation of Lumbar Decompression Adjacent to Instrumented Segments”
Joint Section on Disorders of the Spine and Peripheral Nerves (DSPN)

AOSpine Regional Educator of the Year Award 12/2016
Young Investigator Award 8/2016
“Radiological Correlation of Facet Degeneration and Indirect Decompression After Extreme Lateral Interbody Fusion”
Society of Lateral Access Surgery (SOLAS)

Best Oral Presentation 4/2016
“Annular Repair Using High-Density Collagen Gel With Riboflavin Crosslinkage: Preliminary Data From An In Vivo Ovine Model”
World Forum for Spine Research (WFSR)

Young Investigator Award 3/2016
“Radiological Correlation of Facet Degeneration and Indirect Decompression After Extreme Lateral Interbody Fusion”
9th Annual SOLAS Research Meeting

Charles Kuntz Scholar Award 3/2016
“Annular Repair Using High-Density Collagen Gel Seeded With Fibrochondrocytes In A Rat Model”
Joint Section on Disorders of the Spine and Peripheral Nerves (DSPN)

3rd Place Basic Science Research Paper Award 12/2015
“Total Disc Replacement Using Tissue-Engineered Intervertebral Discs: In Vivo Outcome In A Canine Model”
Cervical Spine Research Society Meeting (CSRS)

New Investigator Recognition Award (NIRA) 3/2015
“Annular Repair Using High Density Collagen Gel: In Vivo Study”
Orthopaedic Research Society (ORS)

Castle Connolly America’s Top Doctors 2015

New York Magazine: Best Doctors 2015

Ronald Apfelbaum Research Award 2/2014
“Annular Repair using High-Density Collagen Gel Seeded with Annular Fibroblasts: An In Vivo Study”
AANS/CNS Section on Disorders of the Spine and Peripheral Nerves

Castle Connolly America’s Top Doctors 1/2014

New York Magazine: Top Doctors 2014

Best Basic Science Abstract Award 8/2013
“Annular Repair Using High Density Collagen Gel: In Vivo Outcome In A Rodent”
4th Annual Minimally Invasive Neurosurgical Society Meeting (MINS)

Best Papers Award 6/2013
“Vertebral Artery and the Cervical Pedicle: Morphometrical Analysis of a Critical Neighborhood”
6th Annual Meeting of the Society for Progress & Innovation for the Near East

New York Magazine: Top Doctors 2013

Best Doctors in America 2013

Mayfield Basic Science Award  2/2013
"Tissue-engineered Intervertebral Discs: Long Term Outcome in the Rodent Spine"
AANS/CNS Section on Disorders of the Spine and Peripheral Nerves

Scientific Paper Award  4/2011
"Tissue Engineered Total Disc Replacement. Final Outcomes of a Murine Caudal Disc Study"
AOSpine North America Fellows Forum, Banff, Canada

Hans-Joerg Wyss Award  7/2010
"Biological Disc Replacement"
World Forum for Spine Research, Montreal Canada

Poster Award, AOSpine International,World Forum For Spine Research  7/2010
Montréal, Canada

1st Place Poster Presentation  6/2010
Annual Meeting of the American College of Spine Surgeons,
Newport Beach, CA

Scientific Paper Award 4/2010
"Biological Disc Replacement"
AOSpine North America Fellows Forum, Banff, Canada

Becker's Orthopedic & Spine Review 2/2010
"50 of the Best Spine Specialists in America"

Poster Award 2/2010
"In vivo Model for Implantation of tissue Engineered Intervertebral Discs in the Rat Tail"
AANS/CNS Joint Section on Disorders of the Spine and Peripheral Nerves

AOSpine Young Investigator Award 6/2009
"Bio-tissue-engineering of intervertebral discs"

Honorary Medical Officer, Fire Department New York 11/2008

Leonard and Fleur Harlan Clinical Scholar in Neurological Surgery 2006
Weill Cornell Medical College

Research Award 2005
Cervical Spine Research Society, DTI Imaging of the Cervical Spine

Cervical Spine Research Society, DTI Imaging of the Cervical Spine Travel Grant Award 10/1999

Japanese Neurosurgical Society, 58th Annual Meeting of the Japanese Neurosurgical Society Resident Research Award 4/1999 "Early experience with coiling of cerebral aneurysms", Allegheny General Hospital

Poster Award 11/1995 "Leukocyte activation after transient brain compression: an intravital Microscopy study", Neurotrauma Society, San Diego

Poster Award 11/1994 "Posttraumatic CSF enhances ELAM-1 mediated neutrophil adhesion to endothelial cells". Society of Neurotrauma, Miami

Favio Columella Award in Neurotraumatology 10/1993 "Reduction of posttraumatic intracranial hypertension by hypertonic/hyperoncotic Saline/Dextran and Mannitol", World Congress of Neurosurgery, Acapulco, Mexico

Travel Award 1992 "Therapy of posttraumatic intracranial hypertension: mannito Vs. hypertonic/hyperoncotic saline/dextran" 5th SALT Meeting, Galveston, Texas

Poster Award 1990 "Influence of inhalation and intravenous anesthesia on posttraumatic Brain edema", Annual Meeting of the German Society of Neurosurgery, Dusseldorf

Poster Award 1991 "Hypertonic-hyperoncotic solutions for fluid resuscitation in cerebral Injury and hemorrhagic shock: effects on regional cerebral blood-flow", 8th International Symposium on Intracranial Pressure "ICP and Craniospinal Dynamics", Rotterdam

Professional Activity:

• Lumbar Spine Research Society (LSRS)    2017 - present

• Journal of Orthopaedic Research Spine (JOR Spine)    2017 – present
- JOR Spine Advisory Review Board

• Explorers Club    2017 – present

• Society for Minimally Invasive Spine Surgery (SMISS) International Board    2014 - present
- Centers of Excellence Commission Chair

• Neurosurgical Academy of West, Central and East Africa    2011 - present
- International Advisory Committee Member

• EuroSpine    2011 - present

• NFL Physicians Society (NFLPS)    2010 - present

• Sonntag Society    2009 - present

• FIENS - Foundation for International Education in Neurological Surgery    2008 - present

• North American Spine Society (NASS)    2008 - present
- Motion Technical Committee

• Society of Lateral Access Surgery (SOLAS)    2007 - present

• AOSpine    2006 - present

• Congress of Neurological Surgeons (CNS)    1997 - present

• American Association of Neurological Surgeons (AANS)    1997 - present
- Spine section
- Neurotrauma section

Publications, Lectures and Presentations:

Peer Reviewed Articles

1. Nisson PL, Hussain I, Härtl R, Kim S, Baaj AA. Arachnoid Web of the Spine: A Systematic Literature Review. J Neurosurg Spine. 2019 Apr:1-10. [Epub ahead of print].

2. Leidinger A, Kim EE, Navarro-Ramirez R, Rutabasibwa N, Msuya SR, Askin G, Greving R, Shabani HK, Härtl R. Spina Trauma in Tanzania: Current Management and Outcomes. J Neurosurg Spine. 2019 Apr 5:1-9. [Epub ahead of print].

3. Schmidt F, Navarro-Ramirez R, Chang L, Kirnaz S, Wipplinger C, Härtl R. Potential and Limitations of Neural Decompression in Extreme Lateral Interbody Fusion. J Neurosurg Sci. 2019 Apr 2. [Epub ahead of print].

4. Kirnaz S, Navarro-Ramirez R, Wipplinger C, Schmidt FA, Hussain I, Kim E, Härtl R. Minimally Invasive Transforaminal Lumbar Interbody Fusion Using 3-Dimensional Total Navigation: 2-Dimensional Operative Video. Oper Neurosurg (Hagerstown). 2019 Mar 19. [Epub ahead of print].

5. Mangat HS, Wu X, Gerber LM, Schwarz JT, Fakhar M, Murthy SB, Stieg PE, Ghajar J, Härtl R: Hypertonic Saline Is Superior to Mannitol for the Combined Effect on Intracranial Pressure and Cerebral Perfusion Pressure Burdens in Patients with Severe Traumatic Brain Injury. Neurosurgery. 2019 Mar 16. [Epub ahead of print].

6. Hernandez RN, Wipplinger C, Navarro-Ramirez R, Patsalides A, Tsiouris AJ, Stieg PE, Kirnaz S, Schmidt FA, Härtl R. Bow Hunter Syndrome with Associated Pseudoaneurysm. World Neurosurg. 2019 Feb;122:53-57. Epub 2018 Oct 25.

7. Bustillo MA, Lien CA, Mack PF, Kopman DJ, Safavynia SA, Rubin L, Stein D, Härtl R, Stieg PE, Hernandez RN, Goldstein PA. Optimizing Patient Access During an Emergency While using Intraoperative Computed Tomography. World Neurosurg. 2019 Jan;121:274-278. Epub 2018 Sep 26.

8. Janjua MB, Hwang SW, Samdani AF, Pahys JM, Naaj AA, Härtl R, Greenfield JP. Instrumented Arthrodesis for Non-Traumatic Craniocervical Instability in Very Young Children. Childs Nerv Syst. 2019 Jan;35(1):97-106. Epub 2018 Jun 29.

9. Rometsch E, Spruit M, Zigler JE, Menon VK, Ouellet JA, Mazel C, Härtl R, Espinoza K, Kandziora F. Screw-Related Complications After Instrumentation of the Osteoporotic Spine: A Systematic Literature Review With Meta-Analysis. Global Spine Journal. Epub 2019 Jan 3. [Epub ahead of print].

10. Wipplinger C, Melcher C, Hernandez RN, Lener S, Navarro-Ramirez R, Kirnaz S, Schmidt FA, Kim E, Härtl R. “One and a Half” Minimally invasive Transforaminal Lumbar Interbody Fusion: Single Level Transforaminal Lumbar Interbody Fusion With Adjacent Segment Unilateral Laminotomy for Bilateral Decompression for Spondylolisthesis with Bi-segmental Stenosis. J Spine Surg. 2018 Dec;4(4):780-786.

11. Ravindra VM, Senglaub SS, Rattani A, Dewan MC, Härtl R, Bisson E, Park KB, Shrime MG. Degenerative Lumbar Spine Disease: Estimating Global Incidence and Worldwide Volume. Global Spine Journal. December 2018, Volume 8; Issue 8, pgs. 784-794. Epub 2018 April 24

12. Hussain I, Sloan SR Jr, Wipplinger C, Navarro-Ramirez R, Patsalides A, Tsiouris AJ, Stieg PE, Kirnaz S, Schmidt FA, Härtl R. Mesenchymal Stem Cell-Seeded High-Density Collagen Gel for Annular Repair: Six-Week Results from In Vivo Sheep Models. Neurosurgery. 2018 Nov 23. [Epub ahead of print].

13. Wipplinger C, Simian A, Hernandez RN, Navarro-Ramirez R, Kim E, Kirnaz S, Schmidt FA, Fink ME, Härtl R. Superficial Siderosis of Central nervous System as Primary Clinical Manifestation Secondary to Intradural Thoracic Disk Hernation. World Neurosurg. 2018 Nov;119:40-44. Epub 2018 Jul 23.

14. Castillo-Calcaneo J, Navarro-Ramirez R, Gimenez-Gigon M, Adjei J, Damolla A, Nakhla J, Hernandez RN, Härtl R. Principles and Fundamentals of Minimally Invasive Spine Surgery. World Neurosurg. 2018 Nov;119:465-471.

15. Moriguchi Y, Borde B, Berlin C, Wipplinger C, Sloan SR, Kirnaz S, Pennicooke B, Navarro-Ramirez R, Khair T, Grunert P, Kim E, Bonassar L, Härtl R. In Vivo Annular Repair Using High-Density Collagen Gel Seeded with Annulus Fibrosus Cells. Acta Biomater. 2018 Oct 1;79:230-238. Epub 2018 Jul 5.

16. Franck P, Bernstein J, Cohen L, Härtl R, Baaj A, Spector J. Local Muscle Flaps Minimize Post-Operative Wound Morbidity in Patients with Neoplastic Disease of the Spine. Clin Neurol Neurosurg. 2018 Aug;171:100-105. Epub 2018 May 29

17. Ottenhausen M, Alalade AF, Rumalla K, Nair P, Baaj A, Härtl R, Kacker A, Greenfield JP, Anand VK, Schwartz TH. Quality of Life After Combined Endonasal Endoscopic Odontoidectomy and Posterior Suboccipital Decompression and Fusion. World Neurosurg. 2018 Jun 7. [Epub ahead of print]

18. Hussain I, Navarro-Ramirez R, Lang G, Härtl R. 3D Navigation-Guided Resection of Giant Ventral Cervical Intradural Schwannoma with 360-Degree Stabilization. Clin Spine Surg. 2018 Jun;31(5):E257-E265.

19. Sloan SR Jr., Lintz M, Hussain I, Härtl R, Bonassar LJ. Biologic Annulus Fibrosus Repair: A Review of Preclinical In Vivo Investigations. Tissue Eng Part B Rev. 2018 Jun;24(3):179-190. Epub 2018 Jan 11.

20. Budohoski KP, Ngerageza JG, Austard B, Fuller A, Galler r, Haglund M, Lett R, Lieberman IH, Mangat HS, March K, Olouch-Olunya D, Piquer J, Qureshi M, Santos MM, Scholler K, Shabani HK, Trivedi RA, Young P, Zubkov MR, Härtl R, Stieg PE. Neurosurgery in East Africa: Innovations. World Neurosurg. 2018 May;113:436-452

21. Santos MM, Qureshi MM, Budohoski KP, Mangat HS, Ngerageza JG, Scholler K, Shabani HK, Zubkov MR, Härtl R. The Growth of Neurosurgery in East Africa: Challenges. World Neurosurg. 2018 May;113:425-435.

22. Mangat HS, Scholler K, Budohoski KP, Ngerageza JG, Qureshi M, Sanos MM, Shabani HK, Zubkov MR, Härtl R, Stieg PE. Neurosurgery in East Africa: Foundations. World Neurosurg. 2018 May;113:411-424.

23. Singh H, Rote S, Jada A, Bander ED, Almodovar-Mercado GJ, Essayed WI, Härtl R, Anand VK, Schwartz TH, Greenfield JP. Endoscopic Endonasal Odontoid Resection with Real-Time Intraoperative Image-Guided Computed Tomography: Report of 4 Cases. J. Neurosurg. 2018 May;128(5):1486-1491. Epub 2017 Jun 16.

24. Drazin D, Grunert P, Härtl R, Polly D, Meyer B, Catchpole K, Laufer I, Sethi R, Perry T, Simon D, Wang M, Fisher C, Scribner M, White G, Tubbs RS, Oskouian RJ, Kim T, Johnson JP. Highlights from the First Annual Spinal Navigation, Emerging Technologies and Systems Integration Meeting. Ann Transl Med. 2018 Mar:6(6):110.

25. Härtl R, Wu AM. Rapid Development of Minimally Invasive Spinal Surgery: Exciting Advancements and Challenges. Ann Transl Med. 2018 Mar:6(6):98.

26. Pennicooke B, Hussain I, Berlin C, Sloan SR, Borde B, Moriguchi Y, Lang G, Navarro-Ramirez R, Cheetham J, Bonassar LJ, Härtl R. Annulus Fibrosus Repair Using High-Density Collagen Gel: An In Vivo Ovine Model. Spine (Phila Pa 1976). 2018 Feb 15:43(4):E208-E215.

27. Alimi M, Lang G, Navarro-Ramirez R, Perrech M, Berlin C, Hofstetter CP, Moriguchi Y, Elowitz E, Härtl R. The Impact of Cage Dimensions, Positioning and Side of Approach in Extreme Lateral Interbody Fusion. Clin Spine Surg. 2018 Feb;31(1):E42-E49.

28. Navarro-Ramirez R, Berlin C, Lang G, Hussain I, Janssen I, Sloan S, Askin G, Avila MJ, Zubkob M, Härtl R. A New Volumetric Radiologic Method to Assess Indirect Decompression after Extreme Lateral Interbody Fusion Using High-Resolution Intraoperative Computed Tomography. World Neurosurg. 2018 Jan;109:59-67.

29. Parajon A, Alimi M, Navarro-Ramirez R, Christos P, Torres-Campa JM, Moriguchi Y, Lang G, Härtl R. Minimally Invasive Transforaminal Lumbar Interbody Fusion: Meta-Analysis of the Fusion Rates. What is the Optimal Graft Material? Neurosurgery. 2017 Dec 1;81(6):958-971.

30. Del Castillo-Calcaneo JD, Navarro-Ramirez R, Nakhla J, Kim E, Härtl R. Minimally Invasive Treatment for a Sacral Tarlov Cyst Through Tubular Retrators. World Neurosurg. 2017 Dec;108:993. Epub 2017 Sep 7.

31. Santos MM, Rubagumya DK, Dominic I, Brighton A, Colombe S, O’Donnell P, Zubkov MR, Härtl R. Infant Hydrocephalus in Sub-Saharan Africa: The Reality on the Tanzanian Side of the Lake. J Neurosurg Pediatr. 2017 Nov;20(5):423-431.

32. Janssen I, Lang G, Navarro-Ramirez R, Jada A, Berlin C, Hilis A, Zubkov M, Gandevia L, Härtl R. Can Fan-Beam Interactive Computed Tomography Accurately Predict Indirect Decompression in Minimally Invasive Spine Surgery Fusion Procedures? World Neurosurg. 2017 Nov;107:322-333.

33. Moriguchi, Y, Mojica-Santiago J, Grunert P, Pennicooke B, Berlin C, Khair T, Navarro-Ramirez R, Ricart Arbona, R, Nguyen J, Härtl R, Bonassar L. Total disc replacement using tissue-engineered intervertebral discs in the canine cervical spine. PLoS One, 2017 Oct 20.;12(10):1-19

34. Salzmann SN, Lampe LP, Fernholz B, Härtl R, Patsalides A, Hughes AP. C2 Bone Erosion Secondary to Iatrogenic Pseudomeningocele; A Case report and Description of a Novel Surgical Technique. World Neurosurg. 2017 Oct;106:1056. Epub 2017 Jul 20.

35. Smart LR, Mangat HS, Issarow B, McClelland P, Mayaya G, Kanumba E, Gerber LM, Wu X, Peck RN, Ngayomela I, Fakhar M, Stieg PE, Härtl R. Severe Traumatic Brain Injury at a Tertiary Referral Center in Tanzania: Epidemiology and Adherence to Brain Trauma Foundation Guidelines. World Neurosurg. 2017 Sep;105:238-248. Epub 2017 May 27.

36. Sloan SR Jr, Galesso D, Secchieri C, Berlin C, Härtl R, Bonassar LJ. Initial Investigation of Individual and Combined Annulus Fibrosus and Nucleus Pulposus Repair Ex Vivo. Acta Biomater. 2017 Sep 1;59:192-199. Epub 2017 Jun 29.

37. Lang G, Navarro-Ramirez R, Gandevia L, Hussain I, Nakhla J, Zubkov M, Härtl R. Elimination of Subsidence with 26-mm Wide Cages in Extreme Lateral Interbody Fusion. World Neurosurg. 2017 Aug;104:644-652. Epub 2017 May 16.

38. Alimi M, Navarro-Ramirez R, Parikh K, Njoku I, Hofstetter CP, Tsiouris AJ, Härtl R. Radiographic and Clinical Outcome of Silicate-Substituted Calcium Phospohate (Si-CaP) Ceramic Bone Graft in Spinal Fusion Procedures. Clin Spine Surg. 2017 Jul;30(6):E845-E852.

39. Grunert P, Moriguchi Y, Grossbard BP, Ricart Arbona RJ, Bonassar LJ, Härtl R. Degenerative Changes of the Canine Cervical Spine After Discectomy Procedures, An In Vivo Study. BMC Vet Res. 2017 Jun 23;13(1):193

40. Rometsch E, Spruit M, , McGuire RA, Gallo-Kopf BS, Kalampoki V, Kandziora F. Does Operative or Nonoperative Treatment Achieve Better Results in A3 and A4 Spinal Fractures without Neurological Deficit?: Systematic Literature Review with Meta-Analysis. Global Spine J. 2017 Jun;7(4):350-372.

41. Aichmair A, Alimi M, Hughes AP, Sama AA, Du JY, Härtl R, Burket JC, Lampe LP, Cammisa FP, Girardi FP. Single-Level Lateral Lumbar Interbody Fusion for the Treatment of Adjacent Segment Disease: A Retrospective Two-Center Study. Spine (Phila Pa 1976). 2017 May 1;42(9):E515-E522

42. Lang G, Perrech M, Navarro-Ramirez R, Hussain I, Pennicooke B, Maryam F, Avila MJ, Härtl R. Potential and Limitations of Neural Decompression In Extreme Lateral Interbody Fusion – A Systematic Review. World Neurosurg. 2017 May;101:99-113. Epub 2017 Jan 31.

43. Boukebir MA, Berlin CD, Navarro-Ramirez R, Heiland T, Scholler K, Rawanduzy C, Kirnaz S, Jada A, Härtl R. Ten-Step Minimally Invasive Spine Lumbar Decompression and Dural Repair Through Tubular Retractors. Oper Neurosurg (Hagerstown). 2017 Apr 1;13(2):232-245.

44. Härtl R, Alimi M, Abdelatif Boukebir M, Berlin CD, Navarro-Ramirez R, Arnold PM, Fehlings MG, Mroz TE, Riew KD. Carotid Artery Injury in Anterior Cervical Spine Surgery: Multicenter Cohort Study and Literature Review. Global Spine J. 2017 Apr;7(1 Suppl):71S-75S. Epub 2017 Apr 1.

45. Navarro-Ramirez R, Lang G, Lian X, Berlin C, Janssen I, Jada A, Alimi M, Härtl R. Total Navigation in Spine Surgery: A Concise Guide to Eliminate Fluoroscopy Using A Portable Intraoperative-CT 3D Navigation System. World Neurosurg. 2017 Apr;100:325-335. Epub 2017 Jan 16.

46. Navarro-Ramirez R, Lang G, Moriguchi Y, Elowitz E, Corredor JA, Avila MJ, Gotfryd A, Alimi M, Gandevia L, Härtl R. Are Locked Facets A Contraindication for Extreme Lateral Interbody Fusion? World Neurosurg. 2017 Apr;100:607-618. Epub 2016 Nov 22.

47. Rymarczuk GN, Harrop JS, Hilis A, Härtl R. Should Expandable TLIF Cages Be Used Routinely To Increase Lordosis? Clin Spine Surg. 2017 Mar;30(2):47-49

48. Schoeller K, Alimi M, Cong GT, Christos P, Härtl R. Lumbar Spinal Stenosis Associated with Degenerative Lumbar Spondylolisthesis: A Systematic Review and Meta-Analysis of Secondary Fusion Rates Following Open vs. Minimally Invasive Decompression. Neurosurgery. 2017 Mar 1;80(3):355-367.

49. Hussain I, Navarro-Ramirez R, Lang G, Härtl R. 3D Navigation-Guided Resection of Giant Ventral Cervical Intradural Schwannoma with 360-Degree Stabilization. Clin Spine Surg. 2017 Feb 27 [Epub ahead of print]

50. Alimi M, Hofstetter CP, Torres-Campa JM, Navarro-Ramirez R, Cong GT, Njoku I Jr, Härtl R. Unilateral Tubular Approach For Bilateral Laminotomy: Effect On Ipsilateral and Contralateral Buttock and Leg Pain. Eur Spine J. 2017 Feb;26(2):389-396. Epub 2016 Jun 8.

51. Sangari SK, Heinneman TE, Conti MS, Dossous PF, Dillon DJ, Tsiouris AJ, Pyo SY, Mtui EP, Härtl R. Quantitative Gross and CT measurements of Cadaveric Cervical Vertebrae (C3-C6) as Guidelines for the Lateral Mass Screw Fixation. Int J Spine Surg. 2016 Dec 20;10:43

52. Corredor JA, Härtl R. Surgical Treatment of Thoracic Spinal Cord Herniation. Clin Spine Surg. 2016 Dec;29(10):415-418.

53. Grunert P, Reyes PM, Newcomb AG, Towne SB, Kelly BP, Theodore N, Härtl R. Biomechanical Evaluation of Lumbar Decompression Adjacent to Instrumented Segments. Neurosurgery. 2016 Dec;79(6):895-904

54. Pennicooke B, Moriguchi Y, Hussain I, Bonassar L, Härtl R. Biological Treatment Approaches for Degenerative Disc Disease: A Review of Clinical Trials and Future Directions. Cureus. 2016 Nov 22;8(11):e892

55. Kim JS, Härtl R, Mayer HM. Minimally Invasive Spinal Surgery. BioMed Research International. 2016. Epub 2016 Sep 8

56. Moriguchi Y, Alimi M, Khair T, Manolarakis G, Berlin C, Bonassar L, Härtl R. Biological Treatment Approaches for Degenerative Disc Disease: A Literature Review of In Vivo Animal and Clinical Data. Global Spine J. 2016 Aug;6(05):497-518

57. Lian X, Navarro-Ramirez R, Berlin C, Jada A, Moriguchi Y, Zhang Q, Härtl R. Total 3D Airo® Navigation for Minimally Invasive Transforaminal Lumbar Interbody Fusion. Biomed Res Int. 2016. Epub 2016 Jul 27.

58. Njoku I, Wanin O, Assey A, Shabani H, Ngerageza JG, Berlin CD, Härtl R. Correction: Minimally Invasive 2D Navigation-Assisted Treatment of Thoracolumbar Spinal Fractures in East Africa: A Case Report. Cureus. 2016 Jun 6;8(6):c2

59. Härtl R, Joeris A, McGuire RA. Comparison of the Safety Outcomes Between Two Surgical Approaches for Anterior Lumbar Fusion Surgery: Anterior Lumbar Interbody Fusion (ALIF) and Extreme Lateral Interbody Fusion (ELIF). Eur Spine J. 2016 May;25(5):1484-521

60. Berends HI, Journee HL, Racz I, van Loon J, Härtl R, Spruit M: Multimodality Intraoperative Neuromonitoring in Extreme Lateral Interbody Fusion. Transcranial Electrical Stimulation as Indispensable Rearview. Eur Spine J. 2016 May;25(5):1581-6

61. Alimi M, Njoku I, Hofstetter CP, Tsiouris AJ, Kesavabhotla K, Boockvar J, Navarro-Ramirez R, Härtl R: Anterior Cervical Discectomy and Fusion (ACDF): Comparison Between Zero Profile Implants and Anterior Cervical Plate and Spacer. Cureus, 2016 April; 8(4):e573

62. Stavrinou P, Härtl R, Krischek B, Kabbasch C, Mpotsaris A, Goldbrunner R. Navigated Transtubular Extraforaminal Decompression of the L5 Nerve Root at the Lumbosacral Junction: Clinical Data, Radiographic Features and Outcome Analysis. Biomed Res int. 2016. Epub 2016 Apr 4.

63. Gotfryd AO, Franzin FJ, Härtl R: Thoracolumbar Chance Fracture During A Professional Female Soccer Game: Case Report. 2016 Mar;14(1):67-70

64. Njoku I, Wanin O, Assey A, Shabani H, Ngerageza JG, Berlin CD, Härtl R. Minimally Invasive 2D Navigation-Assisted Treatment of Thoracolumbar Spinal Fractures in East Africa: A Case Report. Cureus. 2016 Feb 23;8(2):e507

65. Cohen LE, Fullerton N, Mundy LR, Weinstein AL, Fu KM, Ketner JJ, Härtl R, Spector JA. Optimizing Successful Outcomes in Complex Spine Reconstruction Using Local Muscle Flaps. Plast Reconstr Surg. 2016 Jan;137(1):295-301

66. Torres Campa-Santamarina J, Towne S, Alimi M, Navarro-Ramirez R, Härtl R. Minimally Invasive Approach for Extraforaminal Synovial Cyst L5-S1. Cureus, 2015 Oct 22;7(10):e362

67. Grunert P, Borde BH, Towne SB, Moriguchi Y, Hudson KD, Bonassar LJ, Härtl R. Riboflavin Crosslinked High-Density Collagen Gel for the Repair of Annular Defects in Intervertebral Discs: An In Vivo Study. Acta Biomater. 2015 Oct 15;26:215-24.

68. Borde B, Grunert P, Härtl R, Bonassar LJ. Injectable, High-Density Collagen Gels for Annulus Fibrosus Repair: An In Vitro Rat Tail Model. J Biomed Mater Res A. 2015 Aug;103(8):2571-81.

69. Alimi M, Shin B, Macielak M, Hofstetter CP, Njoku I Jr, Tsiouris AJ, Elowitz E, Härtl R. Expandable Polyaryl-Ether-Ether-Ketone Spacers for Interbody Distraction in the Lumbar Spine. Global Spine J. 2015 Jun;5(3):169-78.

70. Luther N, Iorgulescu JB, Geannette C, Gebhard H, Saleh T, Tsiouris AJ, Härtl R; Comparison of Navigated Versus Non- Navigated Pedicle Screw Placement in 260 Patients and 1434 Screws: Screw Accuracy, Screw Size and the Complexity of Surgery. J Spinal Disord Tech. 2015 Jun;28(5):E298-303

71. Mangat HS, Härtl R. Hypertonic Saline for the Management of Raised Intracranial Pressure After Severe Traumatic Brain Injury. Ann N Y Acad Sci. 2015 May;1345:83-8.

72. Von Keudell A, Alimi M, Gebhard H, Härtl R. Adult Degenerative Scoliosis with Spinal Stenosis Treated with Stand-Alone Cage via an Extreme Lateral Transpsoas Approach: A Case Report and Literature Review. Arch Bone Jt Surg. 2015 Apr;3(2):124-9

73. Alimi M, Hofstetter CP, Tsiouris AJ, Elowitz E, Härtl R. Extreme Lateral Interbody Fusion for Unilateral Symptomatic Vertical Foraminal Stenosis. Eur Spine J. 2015 Apr;24 Suppl 3:346-52

74. Evins AL, Banu MA, Njoku I Jr, Elowitz EH, Härtl R, Bernardo A, Hofsterrer CP. Endoscopic Lumbar Foraminotomy. J Clin Neurosci. 2015 Apr;22(4):730-4

75. Alimi M, Hofstetter CP, Pyo SY, Paulo D, Härtl R. Minimally Invasive Laminectomy for Lumbar Spinal Stenosis in Patients With and Without Preoperative Spondylolisthesis: Clinical Outcome and Reoperation Rates. J. Neurosurg Spine. 2015 Apr;22(4):339-52

76. La Corte E, Aldana PR, Ferroli P, Greenfield JP, Härtl R, Anand VK, Schwartz TH. The Rhinopalatine Line as a Reliable Predictor of the Inferior Extent of Endonasal Odontoidectomies. Neurosurg Focus. 2015 Apr;38(4):E16

77. Goldschlager T, Härtl R, Greenfield JP, Anand VK, Schwartz TH. The Endoscopic Endonasal Approach to the Odontoid and Its impact on Early Extubation and Feeding. J Neurosurg 2015 Mar;122(3):511-8.

78. Mangat HS, Chiu YL, Gerber LM, Alimi M, Ghajar J, Härtl R. Hypertonic Saline Reduces Cumulative and Daily Intracranial Pressure Burdens After Severe Traumatic Brain Injury. J Neurosurg. 2015 Jan (122):202-210. Epub 2014 Nov 7.

79. Njoku I Jr, Alimi M, Leng LZ, Shin BJ, James AR, Bhangoo S, Tsiouris AJ, . Anterior Cervical Discectomy and Fusion with a Zero-Profile Integrated Plate and Spacer Device: A Clinical and Radiological Study: Clinical Article. J Neurosur Spine. 2014 Oct;21(4):529-37.

80. Alimi M, Njoku I Jr, Cong GT, Pyo SY, Hofstetter CP, Grunert P, Härtl R. Minimally Invasive Foraminotomy Through Tubular Retractors via A Contralateral Approach in Patients With Unilateral Radiculopathy. Neurosurgery. 2014 Sep;10 Suppl 3:436-47

81. Coburger J, Leng LZ, Rubin DR, Mayaya G, Medel R, Ngayomela I, Ellengala D, Durieux ME, Nicholas J, Härtl R; Multi-Institutional Neurosurgical Training Initiative at a Tertiary Referral Center in Mwanza, Tanzania: Where We Are After 2 Years. World Neurosurg. 2014 Jul-Aug;82(1-2):e1-8. Epub 2012 Sep 27.

82. Alimi M, Hofstetter CP, Cong GT, Tsiouris AJ, James AR, Paulo D, Elowitz E, Härtl R. Radiological and Clinical Outcomes Following Extreme Lateral Interbody Fusion. J Neurosurg Spine. 2014 Jun;20(6):623-35

83. Benneker LM, Andersson G, Iatridis JC, Sakai D, Härtl R , Ito K, Grad D. Cell Therapy for Intervertebral Disc Repair: Advancing Cell Therapy From Bench to Clinics. Eur Cell Mater, 2014 May 6;27:5-11

84. Rapoport BI, Härtl R, Schwartz TH. Cranial Neuropathy due to Intradural Disc Herniation. Neurosurgery. 2014 May;74(5):E561-5

85. Grunert P, Gebhard HH, Robert DB, James AR, Potter HG, Macielak M, Hudson K, Alimi M, Ballon DJ, Aronowitz E, Tsiouris AJ, Bonassar LJ, Härtl R. Tissue-engineered intervertebral discs: MRI results and histology in the rodent spine. J Neurosurg Spine. 2014 Apr;20(4):443-51. Epub 2014 Feb 14.

86. Maier D, Njoku I Jr, Schmutzhard E, Dharsee J, Doppler M, Härtl R, Winkler AS; Traumatic Brain Injury in a Rural and an Urban Tanzanian Hospital – A Comparative, Retrospective Analysis Based on Computed Tomography. World Neurosurg. 2014 Mar-Apr;81(3-4):478-82. Epub 2013 Aug 14.

87. Grunert P, Hudson K, Macielak M, Aronowitz E, Borde BH, Alimi M, Njoku I, Ballon DJ, Tsiouris AJ, Bonassar LJ, Härtl R. Assessment of Intervertebral Disc Degeneration Based on Quantitative MRI Analysis: An In Vivo Study. Spine (Phila Pa 1976). 2014 Mar 15;39(6):E369-78

88. Grunert P, Borde BH, Hudson K, Macielak M, Bonassar LJ, Härtl R. Annular Repair Using High-Density Collagen Gel; A Rat-Tail In Vivo Model. Spine (Phila Pa 1976). 2014 Feb 1;39(3):198-206

89. Gerber LM, Chiu YL, Carney N, Härtl R; Ghajar J; Marked Reduction In Mortality In Patients With Severe Traumatic Brain Injury. J Neurosurg. 2013 Dec;119(6):1583-90. Epub 2013 Oct 8.

90. Hofstetter CP, Shin B, Tsiouris AJ, Elowitz E, Härtl R; Radiographic and Clinical Outcome After 1 and 2 Level Transsacral Axial Interbody Fusion. J Neurosurg Spine. 2013 Oct;19(4):454-463. Epub 2013 Aug 23

91. Hudson KD, Alimi M, Grunert P, Härtl R, Bonassar LJ; Recent Advances In Biological Therapies For Disc Degeneration: Tissue Engineering Of The Annulus Fibrosus, Nucleus Pulposus and Whole Intervertebral Discs. Curr Opin Biotechnol. 2013 Oct;24(5):872-9. Epub 2013 Jun 14

92. Kahamba JF, Assey AB, Dempsey RJ, Qureshi MM, Härtl R; The Second African Federation of Neurological Surgeons Course in the East, Central and Southern Africa Region Held in Dar es Salaam, Tanzania, January 2011. World Neurosurg. 2013 Sep-Oct;80(3-4):255-9

93. Mitchell KB, Giiti G, Kotecha V, Chandika A, Pryor KO, Härtl R, Gilyoma J; Surgical Education at Weill Bugando Medical Centre: Supplementing Surgical Training and Investing In Local Health Care Providers. Can J Surg. 2013 Jun;56(3):199-203

94. Kaminsky IA, Härtl R, Sigounas D, Mlot S, Patsalides A; Transoral C2 Biopsy and Vertebroplasty. Interv Med Appl Sci. 2013 Jun;5(2):76-80. Epub 2013 Jul 4.

95. McCrea HJ, Perrine K, Niogi S, Härtl R; Concussion in Sports. Sports Health. 2013 Mar;5(2):160-4

96. Härtl R, Lam KS, Wang J, Korge A, Kandziora F, Audige L; Worldwide Survey On The Use of Navigation In Spine Surgery. World Neurosurg. 2013 Jan;79(1):162-72

97. Shin BJ, Njoku IU, Tsiouris AJ, Härtl R; Navigated Guide Tube For The Placement of Mini-Open Pedicle Screws Using Stereotactic 3D Navigation Without The Use of K-Wires. J Neurosurg Spine. 2012 Nov 30

98. Farahvar A, Gerber LM, Chiu YL, Carney N, Härtl R, Ghajar J; Increased Mortality in Patients With Severe Traumatic Brain Injury Treated Without Intracranial Pressure Monitoring. J Neurosurg. 2012 Oct;117(4):729-34. Epub 2012 Aug 17

99. Nagineni VV, James AR, Alimi M, Hofstetter C, Shin BJ, Njoku IU, Tsiouris AJ, Härtl R; Silicate-Substituted Calcium Phosphate Ceramic Bone Graft Replacement for Spinal Fusion Procedures. Spine (Phila Pa 1976). 2012 Sep 15;37(20):E1264-72

100. Luther N, Niogi S, Kutner K, Rodeo S, Shetty T, Warren R, Weiss L, Barnes R, Zimmerman R, Tsiouris A, Härtl R; Diffusion Tensor and Susceptibility-weighted Imaging in Concussion Assessment of National Football League Players. Neurosurgery. 2012 Aug; 71(2):E558

101. Shin BJ, James AR, Njoku IU, Härtl R; Pedicle Screw Navigation: A Systematic Review and Meta-Analysis of Perforation Risk for Computer-Navigated Versus Freehand Insertion. J Neurosurg Spine. 2012 Aug;17(2):113-22. Epub 2012 Jun 22

102. Seidenwurm DJ, Wippold FJ, Cornelius RS, Angevine PD, Angtuaco EJ, Broderick DF, Brown DC, Davis PC, Garvin CF, Härtl R, Holly L, McConnell CT, Mechtler LL, Smirniotopoulos JG, Waxman AD; ACR Appropriateness Criteria (®) Myelopathy. J Am Coll Radiol. 2012 May;9(5):315-24

103. Uribe JS, Smith WD, Pimenta L, Härtl R, Dakwar E, Modhia UM, Pollock GA, Nagineni V, Smith R, Christian G, Oliveira L, Marchi L, Deviren V; Minimally Invasive Lateral Approach for Symptomatic Thoracic Disc Herniation: Initial Multi-Center Clinical Experience. J Neurosurg Spine. 2012 Mar; 16(3):264-79. Epub 2011 Dec 16

104. Bowles RD, Gebhard HH, Dyke JP, Ballon DJ, Tomasino A, Cunningham ME, Härtl R, Bonassar LJ; Image-based tissue engineering of a total intervertebral disc implant for restoration of function to the rat lumbar spine. NMR Biomed. 2012 Mar;25(3):443-51. Epub 2011 Mar 8

105. Kim JH, Desai NS, Ricci J, Stieg PE, Rosengart AJ, Härtl R, Fraser JF; Factors contributing to ventriculostomy infection. World Neurosurg. 2012 Jan;77(1):135-40. Epub 2011 Nov 15

106. James AR, Bowles RD, Gebhard HH, Bonassar LJ, Härtl R; Tissue-engineered Total Disc Replacement: Final Outcomes of A Murine Caudal Disc In Vivo Study. Evid Based Spine Care J. 2011 Nov;2(4):55-6

107. Hofstetter CP, James AR, Härtl R; Revision strategies for AxiaLIF. Neurosurg Focus. 2011 Oct;31(4):E17

108. Fourney DR, Dettoria JR, Hall H, Härtl R, McGirt MJ, Daubs MD; A systematic review of clinical pathways for lower back pain and introduction of the Saskatchewan Spine Pathway. Spine (Phila Pa 1976). 2011 Oct 1;36(21 Suppl):S164-71

109. James A, Laufer I, Parikh K, Nagineni VV, Saleh TO, Härtl R; Lumbar Juxtafacet Cyst Resection: The Facet Sparing Contralateral Minimally Invasive Surgical Approach. J Spinal Disord Tech. 2012 Apr;25(2):E13-7

110. Bowles RD, Gebhard HH, Härtl R, Bonassar LJ; Tissue-engineered intervertebral discs produce new matrix, maintain disc height and restore biomechanical function to the rodent spine. Proc Natl Acad Sci USA. 2011 Aug 9;108(32):13106-11. Epub 2011 Aug 1

111. Farahvar A, Gerber LM, Chiu YL, Härtl R, Froelich M, Carney N, Ghajar J; Response to intracranial hypertension treatment as a predictor of death in patients with severe brain injury. J Neurosurg. 2011 May;114(5):1471-8

112. Gebhard H, James AR, Bowles RD, Dyke JP, Saleh T, Doty SP, Bonassar LJ, Härtl R; Biological Intervertebral Disc Replacement: An In Vivo Model and Comparison of Two Surgical Techniques To Approach The Rat Caudal Disc. Evid Based Spine Care J. 2011 Feb;2(1):29-35

113. Hofstetter CP, Chou D, Newman CB, Aryan HE, Girardi FP, Härtl R; Posterior approach for thoracolumbar corpectomies with expandable cage placement and circumferential arthrodesis: a multicenter case series of 67 patients. J Neurosurg Spine. 2011 Mar; 14(3):388-97. Epub 2011 Jan 14

114. Bowles RD, Gebhard HH, Dyke JP, Ballon DJ, Tomasino A, Cunningham ME, Härtl R, Bonassar LJ; Image-based tissue engineering of a total intervertebral disc implant for restoration of function to the rat lumbar spine. NMR Biomed. 2011 Mar 8

115. Fraser J, Gebhard H, Irie D, Parikh K, Härtl R. Iso-C/3-dimensional neuronavigation versus conventional fluoroscopy for minimally invasive pedicle screw placement in lumbar fusion. Minim Invasive Neurosurg. 2010 Aug;53(4):184-90. Epub 2010 Dec 7

116. Tomasino A, Parikh K, Koller H, Zink W, Tsiouris AJ, Steinberger J, Härtl R. The vertebral artery and the cervical pedicle: morphometric analysis of a critical neighborhood. J Neurosurg Spine. 2010 Jul;13(1):52-60.

117. Wu RH, Fraser JF, Härtl R. Minimal Access Versus Open Transforaminal Lumbar Interbody Fusion: Meta-Analysis of Fusion Rates. Spine (Phila Pa 1976). 2010 Dec 15;35(26):2273-81.

118. Moliterno JA, Knopman J, Parikh K, Cohan JN, Huang QD, Aaker GD, Grivoyannis AD, Patel AR, Härtl R, Boockvar JA: Results and risk factors for recurrence following single-level tubular lumbar microdiscectomy. J Neurosurg Spine. 2010 June(5):680-6

119. Winkler AS, Tluway A, Slottje D, Schmutzhard E, Härtl R.; The East African Neurosurgical Research Collaboration: The Pattern of Neurosurgical Disorders in Rural Northern Tanzania: A Prospective Hospital-Based Study. World Neurosurg. 2010 Apr;73(4):264-269.

120. Härtl R., Ellengala DB: Neurosurgery and Global Health: Going far and fast, together. World Neurosurg. 2010 Apr;73(4):259-60.

121. Tomasino A, Gebhard H, Parikh K, Wess C, Härtl R. Bioabsorbable instrumentation for single-level cervical degenerative disc disease: a radiological and clinical outcome study. J Neurosurg Spine. 2009 Nov;11(5):529-37.

122. Luther N, Tomasino A, Parikh K, Härtl R. Neuronavigation in the minimally invasive presacral approach for lumbosacral fusion. Minim Invasive Neurosurg. 2009 Aug;52(4):196-200

123. Tomasino A, Parikh K, Steinberger J, Knopman J, Boockvar J, Härtl R. Tubular microsurgery for lumbar discectomies and laminectomies in obese patients: operative results and outcome. Spine (Phila Pa 1976). 2009 Aug 15;34(18):E664-72.

124. Gerber LM, Ni Q, Härtl R, Ghajar J. Impact of falls on early mortality from severe traumatic brain injury. J Trauma Manag Outcomes. 2009 Jul 30;3:9.

125. Froelich M, Ni Q, Wess C, Ougorets I, Härtl R. Continuous hypertonic saline therapy and the occurrence of complications in neurocritically ill patients. Crit Care Med. 2009 Feb 24.

126. Leng LZ, Anand VK, Hartl R, Schwartz TH.Spine. Endonasal endoscopic resection of an os odontoideum to decompress the cervicomedullary junction: a minimal access surgical technique. 2009 Feb 15;34(4):E139-43.

127. Parikh K, Tomasino A, Knopman J, Boockvar J, Härtl R. Operative results and learning curve: microscope-assisted tubular microsurgery for 1- and 2-level discectomies and laminectomies. Neurosurg Focus. 2008;25(2):E14.

128. Härtl R, Gerber LM, Ni Q, Ghajar J: Effect of early nutrition on deaths due to severe traumatic brain injury.J Neurosurg. 2008 Jul;109(1):50-6

129. Luther N, Bilsky MH, Härtl R: Giant cell tumor of the spine. Neurosurg Clin N Am. 2008 Jan;19(1):49-55.

130. Bratton SL, Chestnut RM, Ghajar J, McConnell Hammond FF, Harris OA, Härtl R, Manley GT, Nemecek A, Newell DW, Rosenthal G, Schouten J, Shutter L, Timmons SD, Ullman JS, Videtta W, Wilberger JE, Wright DW: Guidelines for the management of severe traumatic brain injury. XV. Steroids. J Neurotrauma. 2007;24 Suppl 1:S91-5.

131. Bratton SL, Chestnut RM, Ghajar J, McConnell Hammond FF, Harris OA, Härtl R, Manley GT, Nemecek A, Newell DW, Rosenthal G, Schouten J, Shutter L, Timmons SD, Ullman JS, Videtta W, Wilberger JE, Wright DW: Guidelines for the management of severe traumatic brain injury. XIV. Hyperventilation. J Neurotrauma. 2007;24 Suppl 1:S87-90.

132. Bratton SL, Chestnut RM, Ghajar J, McConnell Hammond FF, Harris OA, Härtl R, Manley GT, Nemecek A, Newell DW, Rosenthal G, Schouten J, Shutter L, Timmons SD, Ullman JS, Videtta W, Wilberger JE, Wright DW: Guidelines for the management of severe traumatic brain injury. XIII. Antiseizure prophylaxis. J Neurotrauma. 2007;24 Suppl 1:S83-6.

133. Bratton SL, Chestnut RM, Ghajar J, McConnell Hammond FF, Harris OA, Härtl R, Manley GT, Nemecek A, Newell DW, Rosenthal G, Schouten J, Shutter L, Timmons SD, Ullman JS, Videtta W, Wilberger JE, Wright DW: Guidelines for the management of severe traumatic brain injury. XII. Nutrition. J Neurotrauma. 2007;24 Suppl 1:S77-82.

134. Bratton SL, Chestnut RM, Ghajar J, McConnell Hammond FF, Harris OA, Härtl R, Manley GT, Nemecek A, Newell DW, Rosenthal G, Schouten J, Shutter L, Timmons SD, Ullman JS, Videtta W, Wilberger JE, Wright DW: Guidelines for the management of severe traumatic brain injury. XI. Anesthetics, analgesics, and sedatives. J Neurotrauma. 2007;24 Suppl 1:S71-6.

135. Bratton SL, Chestnut RM, Ghajar J, McConnell Hammond FF, Harris OA, Härtl R, Manley GT, Nemecek A, Newell DW, Rosenthal G, Schouten J, Shutter L, Timmons SD, Ullman JS, Videtta W, Wilberger JE, Wright DW: Guidelines for the management of severe traumatic brain injury. I. Blood pressure and oxygenation.J Neurotrauma. 2007;24 Suppl 1:S7-13.

136. Bratton SL, Chestnut RM, Ghajar J, McConnell Hammond FF, Harris OA, Härtl R, Manley GT, Nemecek A, Newell DW, Rosenthal G, Schouten J, Shutter L, Timmons SD, Ullman JS, Videtta W, Wilberger JE, Wright DW: Guidelines for the management of severe traumatic brain injury. X. Brain oxygen monitoring and thresholds. J Neurotrauma. 2007;24 Suppl 1:S65-70.

137. Bratton SL, Chestnut RM, Ghajar J, McConnell Hammond FF, Harris OA, Härtl R, Manley GT, Nemecek A, Newell DW, Rosenthal G, Schouten J, Shutter L, Timmons SD, Ullman JS, Videtta W, Wilberger JE, Wright DW: Guidelines for the management of severe traumatic brain injury. IX. Cerebral perfusion thresholds. J Neurotrauma. 2007;24 Suppl 1:S59-64.

138. Bratton SL, Chestnut RM, Ghajar J, McConnell Hammond FF, Harris OA, Härtl R, Manley GT, Nemecek A, Newell DW, Rosenthal G, Schouten J, Shutter L, Timmons SD, Ullman JS, Videtta W, Wilberger JE, Wright DW: Guidelines for the management of severe traumatic brain injury. VIII. Intracranial pressure thresholds. J Neurotrauma. 2007;24 Suppl 1:S55-8.

139. Bratton SL, Chestnut RM, Ghajar J, McConnell Hammond FF, Harris OA, Härtl R, Manley GT, Nemecek A, Newell DW, Rosenthal G, Schouten J, Shutter L, Timmons SD, Ullman JS, Videtta W, Wilberger JE, Wright DW: Guidelines for the management of severe traumatic brain injury. VII. Intracranial pressure monitoring technology. J Neurotrauma. 2007;24 Suppl 1:S45-54.

140. Bratton SL, Chestnut RM, Ghajar J, McConnell Hammond FF, Harris OA, Härtl R, Manley GT, Nemecek A, Newell DW, Rosenthal G, Schouten J, Shutter L, Timmons SD, Ullman JS, Videtta W, Wilberger JE, Wright DW: Guidelines for the management of severe traumatic brain injury. VI. Indications for intracranial pressure monitoring. J Neurotrauma. 2007;24 Suppl 1:S37-44.

141. Bratton SL, Chestnut RM, Ghajar J, McConnell Hammond FF, Harris OA, Härtl R, Manley GT, Nemecek A, Newell DW, Rosenthal G, Schouten J, Shutter L, Timmons SD, Ullman JS, Videtta W, Wilberger JE, Wright DW: Guidelines for the management of severe traumatic brain injury. V. Deep vein thrombosis prophylaxis. J Neurotrauma. 2007;24 Suppl 1:S32-6.

142. Bratton SL, Chestnut RM, Ghajar J, McConnell Hammond FF, Harris OA, Härtl R, Manley GT, Nemecek A, Newell DW, Rosenthal G, Schouten J, Shutter L, Timmons SD, Ullman JS, Videtta W, Wilberger JE, Wright DW: Guidelines for the management of severe traumatic brain injury. IV. Infection prophylaxis. J Neurotrauma. 2007;24 Suppl 1:S26-31.

143. Bratton SL, Chestnut RM, Ghajar J, McConnell Hammond FF, Harris OA, Härtl R, Manley GT, Nemecek A, Newell DW, Rosenthal G, Schouten J, Shutter L, Timmons SD, Ullman JS, Videtta W, Wilberger JE, Wright DW: Guidelines for the management of severe traumatic brain injury. III. Prophylactic hypothermia. J Neurotrauma. 2007;24 Suppl 1:S21-5.

144. Bratton SL, Chestnut RM, Ghajar J, McConnell Hammond FF, Harris OA, Härtl R, Manley GT, Nemecek A, Newell DW, Rosenthal G, Schouten J, Shutter L, Timmons SD, Ullman JS, Videtta W, Wilberger JE, Wright DW: Guidelines for the management of severe traumatic

145. Voss HU, Härtl R, Gamache FW, Heier LA, Ballon DJ & Ulug AM: Diffusion Tensor Imaging in Cervical Spondylotic Myelopathy, World Spine Journal 2, 140-147 (2007).

146. Aryan HE, Lu DC, Acosta FL Jr, Härtl R, McCormick PW, Ames CP: Bioabsorbable anterior cervical plating: Initial multicenter clinical and radiographic experience. Spine. 2007 May 1;32(10):1084-8.

147. Fraser JF, Härtl R: Anterior approaches to fusion of the cervical spine: a meta-analysis of fusion rates. J Neurosurg Spine. 2007 Apr;6(4):298-303.

148. Härtl R, Chamberlain RH, Fifield MS, Chou D, Sonntag VK, Crawford NR: Biomechanical comparison of two new atlantoaxial fixation techniques with C1-2 transarticular screw-graft fixation. J Neurosurg Spine. 2006 Oct;5(4):336-42.

149. Härtl R, Gerber LM, Iacono L, Ni Q, Lyons K, Ghajar J: Direct transport within an organized state trauma system reduces mortality in patients with severe traumatic brain injury. J Trauma. 2006 Jun;60(6):1250-6

150. Bullock MR, Chesnut R, Ghajar J, Gordon D, Härtl R, Newell DW, Servadei F, Walters BC, Wilberger JE; Surgical Management of Traumatic Brain Injury Author Group. Surgical management of acute subdural hematomas. Neurosurgery. 2006 Mar;58(3 Suppl):S16-24

151. Bullock MR, Chesnut R, Ghajar J, Gordon D, Härtl R, Newell DW, Servadei F, Walters BC, Wilberger JE; Surgical Management of Traumatic Brain Injury Author Group. Surgical management of acute epidural hematomas. Neurosurgery. 2006 Mar;58(3 Suppl):S7-15;

152. Chou D, Larios AE, Chamberlain RH, Fifield MS, Härtl R, Dickman CA, Sonntag VK, Crawford NR. A biomechanical comparison of three anterior thoracolumbar implants after corpectomy: are two screws better than one? J Neurosurg Spine. 2006 Mar;4(3):213-8.

153. Bullock MR, Chesnut R, Ghajar J, Gordon D, Härtl R, Newell DW, Servadei F, Walters BC, Wilberger J; Surgical Management of Traumatic Brain Injury Author Group. Surgical management of traumatic parenchymal lesions. Neurosurgery. 2006 Mar;58(3 Suppl):S25-46;

154. Bullock MR, Chesnut R, Ghajar J, Gordon D, Härtl R, Newell DW, Servadei F, Walters BC, Wilberger J; Surgical Management of Traumatic Brain Injury Author Group. Surgical management of posterior fossa mass lesions. Neurosurgery. 2006 Mar;58(3 Suppl):S47-55;

155. Bullock MR, Chesnut R, Ghajar J, Gordon D, Härtl R, Newell DW, Servadei F, Walters BC, Wilberger J; Surgical Management of Traumatic Brain Injury Author Group. Surgical management of depressed cranial fractures. Neurosurgery. 2006 Mar;58(3 Suppl):S56-60;

156. Bullock MR, Chesnut R, Ghajar J, Gordon D, Härtl R, Newell DW, Servadei F, Walters BC, Wilberger JE. Guidelines for the surgical management of traumatic brain injury author group: acknowledgments. Neurosurgery. 2006 Mar;58(3 Suppl):S2

157. Härtl R, Joshi S, Levine S, Wang M, Sciacca RR: “Pial arterial response to topical verapamil in acute closed cranial windows in rabbits” Anesth Analg. 2005 Apr;100(4):1140-6

158. Fraser J and Härtl R: “Decompressive vraniectomy as a therapeutic option in the treatment of hemispheric stroke” Curr Atheroscler Rep 2005 Jul;7(4):296-304

159. Härtl R and Ougorets, I: “Critical care of neurotrauma” Curr Neurol Neurosci Rep. 2004 Nov;4(6):481-8

160. Joshi S, Wang M, Härtl R: Retinal discoloration test. J Cereb Blood Flow Metab. 2004 Mar;24 (3):305-8.

161. Joshi S, Härtl R, Wang M, Feng L, Hoh D, Sciacca RR, Mangla S: The Acute Cerebrovascular Effects of Intracarotid Adenosine in Nonhuman Primates. Anesth Analg 2003;97:231–7

162. Joshi S, Härtl R, Sun LS, Libow AD, Wang M, Young WL, Pile-Spellman J, Connolly SE, Hirshman CA: Despite In-Vitro Increase in cGMP Concentrations, Intracarotid Nitroprusside Fails to Augment Cerebral blood flow of healthy baboons. Anesthesiology 2003: 98: 412-9

163. Maroon JC, Lovell MR, Norvig ATC, Podell K, Powell JW, Härtl R: Cerebral Concussion in Athletes: Evaluation and neuropsychological Testing. Neurosurgery 47: 659-672, 2000.

164. Bardt TF, Unterberg AW, Härtl R, Kiening KL, Schneider GH and Lanksch WR: Monitoring of brain tissue PO2 in traumatic brain injury: effect of cerebral hypoxia on outcome. Acta Neurochir Suppl (Wien) 71: 153-6, 1998.

165. Härtl R, Medary MB, Ruge M, Arfors KE and Ghajar J: Early white blood cell dynamics after traumatic brain injury: effects on the cerebral microcirculation. J Cereb Blood Flow Metab 17: 1210-20, 1997.

166. Härtl R, Medary MB, Ruge M, Arfors KE, Ghahremani F and Ghajar J: Hypertonic/hyperoncotic saline attenuates microcirculatory disturbances after traumatic brain injury. J Trauma 42: S41-7, 1997.

167. Härtl R, Bardt TF, Kiening KL, Sarrafzadeh AS, Schneider GH and Unterberg AW: Mannitol decreases ICP but does not improve brain-tissue pO2 in severely head-injured patients with intracranial hypertension. Acta Neurochir Suppl (Wien) 70: 40-2, 1997.

168. Härtl R, Ghajar J, Hochleuthner H and Mauritz W: Hypertonic/hyperoncotic saline reliably reduces ICP in severely head- injured patients with intracranial hypertension. Acta Neurochir Suppl (Wien) 70: 126-9, 1997.

169. Nolte D, Steinhauser P, Pickelmann S, Berger S, Härtl R and Messmer K: Effects of diaspirin-cross-linked hemoglobin (DCLHb) on local tissue oxygen tension in striated skin muscle: an efficacy study in the hamster. J Lab Clin Med 130: 328-38, 1997.

170. Härtl R, Ghajar J, Hochleuthner H and Mauritz W: Treatment of refractory intracranial hypertension in severe traumatic brain injury with repetitive hypertonic/hyperoncotic infusions. Zentralbl Chir 122: 181-5, 1997.

171. Kiening KL, Härtl R, Unterberg AW, Schneider GH, Bardt T and Lanksch WR: Brain tissue pO2-monitoring in comatose patients: implications for therapy. Neurol Res 19: 233-40, 1997.

172. Sarrafzadeh AS, Kiening KL, Bardt TF, Härtl R, Schneider GH and Unterberg AW: [Monitoring cerebral oxygenation: a methodological comparison]. Anasthesiol Intensivmed Notfallmed Schmerzther 32: S224-30, 1997.

173. Unterberg AW, Kiening KL, Härtl R, Bardt T, Sarrafzadeh AS and Lanksch WR: Multimodal monitoring in patients with head injury: evaluation of the effects of treatment on cerebral oxygenation. J Trauma 42: S32-7, 1997.

174. Härtl R, Medary M, Ruge M, Arfors KE and Ghajar J: Blood-brain barrier breakdown occurs early after traumatic brain injury and is not related to white blood cell adherence. Acta Neurochir Suppl (Wien) 70: 240-2, 1997.


175. Härtl R, Schurer L, Schmid-Schonbein GW and del Zoppo GJ: Experimental antileukocyte interventions in cerebral ischemia. J Cereb Blood Flow Metab 16: 1108-19, 1996.

176. Berger S, Schurer L, Härtl R, Messmer K and Baethmann A: Reduction of post-traumatic intracranial hypertension by hypertonic/hyperoncotic saline/dextran and hypertonic mannitol. Neurosurgery 37: 98-107; discussion 107-8, 1995.

177. Härtl R, Schurer L, Goetz C, Berger S, Rohrich F and Baethmann A: The effect of hypertonic fluid resuscitation on brain edema in rabbits subjected to brain injury and hemorrhagic shock. Shock 3: 274-9, 1995.

178. Berger S, Schurer L, Härtl R, Deisbock T, Dautermann C, Murr R, Messmer K and Baethmann A: 7.2% NaCl/10% dextran 60 versus 20% mannitol for treatment of intracranial hypertension. Acta Neurochir Suppl (Wien) 60: 494-8, 1994.

179. Berger S, Schurer L, Dautermann C, Härtl R, Murr R, Rohrich F and Baethmann A: Hypertonic solutions in treatment of intracranial pressure]. Zentralbl Chir 118: 237-43; discussion 243-4, 1993.

180. Dautermann C, Schurer L, Härtl R, Rohrich F, Baethmann A and Messmer K: Treatment of hemorrhagic hypotension with hypertonic saline/dextran: effects on brain surface oxygen tension in experimentally traumatized brain. Adv Exp Med Biol 317: 731-6, 1992.

181. Schurer L, Dautermann C, Härtl R, Murr R, Berger S, Rohrich F, Messmer K and Baethmann A: Therapy of hemorrhagic shock using small volumes of hypertonic- hyperoncotic NaCl-dextran solution--effects on the brain. Anasthesiol Intensivmed Notfallmed Schmerzther 27: 209-17, 1992.

182. Schurer L, Dautermann C, Härtl R, Murr R, Berger S, Rohrich F, Messmer K and Baethmann A: Treatment of hemorrhagic hypotension with hypertonic/hyperoncotic solutions: effects on regional cerebral blood flow and brain surface oxygen tension. Eur Surg Res 24: 1-12, 1992.


Case Reports

1. Leng LZ, Shajari M, Hartl R : Management of Acute Cervical Compression Fractures in Two Patients with Osteogenesis Imperfecta, Spine (Phila Pa 1976). 2010 Oct 15;35(22):E1248-52

2. Laufer I, Greenfield JP, Anand VK, Härtl R, Schwartz TH: Endonasal endoscopic resection of the odontoid process in a nonachondroplastic dwarf with juvenile rheumatoid arthritis: feasibility of the approach and utility of the intraoperative Iso-C three-dimensional navigation.J Neurosurg Spine. 2008 Apr;8(4):376-80.

3. Laufer I, Edgar MA, Härtl R: Primary intraosseous paraganglioma of the sacrum: a case report. Spine J. 2007 Nov-Dec;7(6):733-8.

4. Chou D, Härtl R, Sonntag VK. Conus medullaris syndrome without lower-extremity involvement in L-1 burst fractures: report of four cases. J Neurosurg Spine. 2006 Mar;4(3):265-9.

5. Härtl R and Ko K: In utero skull fracture: case report. J Trauma 41: 549-52, 1996.

Other Publication

1. Dyrda L. Dr. Roger Hartl: The Biggest Opportunity in Spinal Biologics. Becker’s Spine Review, May 2019. Vol 2019 No. 3

2. Wood M: The Role of the Surgical Microscope in the Modern MIS Spine – Drs. K.D. Riew, Michael Mayer, Roger Härtl and Mohd Hisam Muhamad Ariffin Share Their Experiences. Becker’s Spine Review, August 3, 2016

3. Njoku I Jr., Härtl R: Minimally Invasive 2D-Navigation-Assisted Spine Surgery in East Africa. AOTK System Innovations Magazine. December 2015, pgs. 33-34

4. Härtl R , Corredor JA, Moriguchi Y: New Ziehm Vision RFD 3D: An Evaluation of Mobile C-Arm Three-Dimensional Workflow, Features and Image Quality.

5. Virk MS, Härtl R: For Cervical Myelopathy from Spondylosis, Which Surgical Approach is Better – Anterior or Posterior? Neurology Alert. August 2011;29(12):94-96.

6. Hofstetter CP, Härtl R: Hypothermia for Acute Brain Trauma. Neurology Alert. April 2011;29(8):58-60.

7. Marcus J, James A, Härtl R: Minimally Invasive Surgical Treatment Options for Lumbar Disc Herniations and Stenosis. Seminars in Spine Surgery 23:20-26, March 2011

8. Gebhard H, Bowles R, Dyke J, Saleh T, Doty S, Bonassar L, Härtl R: Total disc replacement using a tissue-engineered intervertebral disc in vivo: new animal model and initial results. Evidence-Based Spine-Care Journal, AOSpine, Volume 1/Issue 2, August 2010, pgs. 63-67

9. Härtl R: Computer-Assisted Surgery for Spinal Instrumentation. TK Systems Journal, AO Foundation. December 2010, pgs. 2-8

10. Härtl R: Traumatic Brain Injury and the Use of Hypertonic Solutions. Neurology Alert. December 2010;29(4):25-27.

11. Härtl R: What Is the Best Technique for Removing a Chronic Subdural Hematoma? Neurology Alert. December 2009;28(4):29-30.

12. Wait SD, Härtl R.: Multi-institutional American team teaches Neurosurgery in underserved Tanzania. World Neurosurg. 2010 Jun;73(6):610-1

13. Fraser JF, Von Jako R, Carrino JA, MPH, Härtl R: Electromagnetic Navigation in Minimally Invasive Spine Surgery: Results of a Cadaveric Study to Evaluate Percutaneous Pedicle Screw Insertion. SAS Journal. Winter 2008;2:43–47.

14. Fraser JF, Härtl R, Boockvar J: SPORTing Statistics: Slicing the Drive on Appropriate Treatment for Herniated Lumbar Discs. Neurology Alert. Feb 2007;25(6):41-43.

15. Berger S and Härtl R: Traumatic Brain Injury and Use of Hypertonic Solutions. Transfusion Alternatives in Transfusion Medicine VOLUME 6 NUMBER 4 MARCH 2005

16. Härtl R, Dickman C, Sonntag VK, Theodore N: Technique of thoracic pedicle screw fixation for trauma. Operative techniques in Neurosurgery. 2004, Volume 7, 22-30

17. Härtl R, Dickman C, Sonntag VK, Theodore N: Anterior approach for thoracic corpectomy in trauma. 2004, Volume 7, 31-41

18. Härtl R, Dickman C: Resection of a sacral tumor: Barrows Quarterly 2004, volume 20, number 3

19. Warren WL, Medary MB, Tantuwaya L, Flannagan P, Oh M, Härtl R, Dureza CD, Fukushima T: Dural Closure Using Acellular Human Dermis: Results of 200 Craniotomies. Neurosurgery. 43(3):696, September 1998.

20. Härtl R, Ghajar J, Medary M: Hypertonic saline lowers ICP by dehydrating brain tissue without affecting cerebral blood volume: 837. Neurosurgery. 41(3):755, September 1997.

21. Härtl R, Bardt T, Kiening K, Sarrafzadeh A and Unterberg A: Brain-tissue PO2 during cardiac arrest and cerebral herniation in severely head-injured patients. Cardiovascular Engineering 2: 120-126, 1997.

22. Unterberg A, Kiening K, Bardt T, Sarrafzadeh A, Härtl R, Schneider G and Lanksch W: Monitoring of cerebral oxygenation. Diemath, H., Sommerauer, J. and von Wild, K.: Brain protection in severe head injury Munchen: Zuckerschwerdt Verlag. 1996

23. Härtl R, Ruge M, Medary M, Ghahremani F, Arfors K and Ghajar J: A new model for the investigation of the cerebral microcirculatory dynamics after traumatic brain injury. Messmer, K. and Kubler, W.: 6th World Congress for Microcirculation Bologna: Monduzzi Editore. 1996; 691-95.

24. Berger S, Härtl R, Schurer L, Dautermann C, Rohrich F, Messmer K and Baethmann A: Blood-brain-barrier permeability for FITC dextran in animals with acute brain injury receiving small-volume resuscitation. Messmer, K.: Progress in applied microcirculation 22. Basel: Karger. 1996 22; 20-32.

25. Goetz C, Berger S, Härtl R, Schurer L, Rohrich F, Messmer K and Baethmann A: Consequences of small-volume resuscitation for cerebral blood flow and tissue pO2 in the presence of a focal brain lesion. Hartmann, A., Yatsu, F. and Kuschinsky, W.: Cerebral ischemia and the heart Springer Verlag: New York. 1995

26. Berger S, Schurer L, Härtl R, Messmer K, Baethmann A. Reduction of Post-traumatic Intracranial Hypertension by Hypertonic/Hyperoncotic Saline/Dextran and Hypertonic Mannitol. Neurosurgery; 37(1):98-108, July 1995.

27. Härtl R: Surgical hazards for the surgeon. Contemporary Surgery for the resident 2: 23-29, 1994.

28. Berger S, Härtl R, Schurer L, Dautermann C, Rohrich F, Messmer K and Baethmann A: Small-volume resuscitation in hemorrhagic shock by hypertonic/hyperoncotic NaCl-dextran - effects on the CNS. Hartmann and Yatsu: Cerebral ischemia and basic mechanisms Springer Verlag. 1994; 411-420.

29. Härtl R, Schurer L, Dautermann C, Berger S, Rohrich F, Messmer K and Baethmann A: The influence of small-volume resuscitation from hemorrhagic shock and brain injury on the formation of brain edema in rabbits. Intracranial pressure IX Tokyo: Springer. 1994, 225-9.

30. Härtl R, Schurer L, Dautermann C, Rohrich F, Berger S, Murr R, Messmer K and Baethmann A: Effect of hypertonic-hyperoncotic solutions (HHS) on increased ICP after a focal brain lesion and inflation of an intracranial balloon. Avezaat, C. J. J.: Intracranial Pressure VIII Berlin: Springer Verlag. 1993, 612-614.

31. Dautermann C, Berger S, Härtl R, Schurer L, Rohrich F, Messmer K and Baethmann A: Treatment of hemorrhagic hypotension with hypertonic saline/dextran: effects on brain surface tension in experimentally traumatized brain. Erdmann, W. and Burley, D.: Oxygen transport to tissue XIV New York: Planum Press. 1992, 731-736.

Invited Published Commentaries

1. Härtl R.; Comment on the article: Minimally Invasive Transforaminal Lumbar Interbody Fusion Using Banana-Shaped and Straight Cages: Radiological and Clinical Results from A Prospective Randomized Clinical Trial. Neurosurg 2018, vol. 82(3), p.289-298.

2. Della Volpe K., Härtl R.; Few Differences in Complication Rates Found Among Various Lumbar Microdiscectomy Techniques: Findings Likely Reflect Real-World Practice. SpineUniverse. December 2015

3. Härtl R., Alimi M.; Response to the editorial article: Minimally Invasive Spinal Surgery and Spinal Stenosis. J Neurosurg Spine. 2015 April;22(4):337-338

4. Härtl R., Navarro-Ramirez R.; Comment on the article: Multilevel Mini-Open TLIFs and Percutaneous Pedicle Screw Fixation: Description of a Simple Technical Nuance Used to Increase Intraoperative Safety and Improve Workflow. Tips and Tricks and Review of the Literature. Neurosurg Rev. 2014 Nov 14 [Epub ahead of print]

5. Härtl R.: Response to comment on the article: Radiographic and Clinical Outcome After 1 and 2 Level Transsacral Axial Interbody Fusion. J Neurosurg Spine. 2014 May;20(5):599-601

6. Härtl R, Stieg PE; Intracranial Pressure is Still Number 1 Despite BEST:TRIP Study. World Neurosurg. 2013 May-Jun;79(5-6):599-600. Epub 2013 Mar 23

7. Uribe JS, Smith WD, Pimenta L, Härtl R, Deviren V; Response. Thoracic Disc. J Neurosurg Spine. 2013 May;18(5):530-3

8. Hofstetter CP, Härtl R; It Takes Two To Tango: Activation of Cortex and Lumbosacral Circuitry Restores Locomotion In Spinal Cord Injury. World Neurosurg. 2012 Nov; 78(5):380-3. Epub 2012 Sep 5

9. Hofstetter CP, Härtl R, Schwartz T; Pituitary Adenomas in Nigeria - Surgical and Societal Challenges. World Neurosurg. 2012 May-Jun;77(5-6):610-2. Epub 2011 Nov 7

10. Härtl R.: Comment to the article: Tubular disckectomy vs conventional microdiskectomy for sciatica: A randomized controlled trial. Minimally Invasive Neurosurg. 2010 Jun;53(3):95-6

11. Open reduction of C1-C2 subluxation with the use of C1 lateral mass and C2 translaminar screws, Neurosurgery. 2008 Jul;63(1 Suppl 1):ONS95-8

12. Dorsal Lumbar Interbody Fusion For Chronic Axial, Mechanical Low Back Pain: A Modification of Two Established Techniques; Neurosurgery 63 Suppl:ONS104-ONS109, 2008

13. Exploration and Decompression of the Spinal Canal Using Split Laminotomy and its Modification, The "Archbone" Technique; Neurosurgery 62 Suppl:ONS0432-ONS441, 2008

14. Simple Intraoperative Technique For Hemostasis of Cervical Venous Bleeding; Neurosurgery 62[ONS Suppl2]:ONS442-ONS444, 2008

15. Fraser JF, Härtl R. Even in trauma, time is brain. Crit Care Med. 2008 Oct;36(10):2951-2

16. Smith MJ, Härtl R. Maintaining cerebral perfusion after polytrauma using arginine vasopressin: a classic drug revisited. Crit Care Med. 2008 Sep;36(9):2703-4.

17. Härtl R, Froelich M: Mannitol and hypertonic saline: going head to head. Crit Care Med. 2008 Mar;36(3):1005-6

18. Froelich M, Härtl R:Ultra-early hyperosmolar treatment in traumatic brain injury: will surgery soon be old-school? Crit Care Med. 2008 Feb;36(2):642-3

19. Härtl R: Multilevel Anterior Cervical Fusion Using A Collagen-Hydroxyapatite Matrix with Iliac Crest Bone Marrow Aspirate: An 18-Month Follow-up Study; Neurosurgery 61:963-971, 2007

20. Härtl R: Back to basics, or the evolution of traumatic brain injury management since Scipione Riva-Rocci. Crit Care Med. 2007 Apr;35(4):1196-7


Books

1. Härtl R, Bonassar L: Biological Approaches to Spinal Disc Repair and Regeneration for Clinicians, 1st edition, Härtl R, Bonassar L (eds), Thieme 2017

2. Härtl R, Korge A: Minimally Invasive Spine Surgery – Techniques, Evidence and Controversies, 1st edition, Härtl R, Korge A (eds), Thieme 2012


Book Chapters and Reviews

1. Hillis A, Wipplinger C, Kirnaz S, Schmidt FA, Härtl R “Part 4 – Lumbar Spine: How to perform a revision lumbar decompression at the index level through a minimally invasive (MIS) approach”: Revision Spine Surgery: Pearls and Pitfalls, Vaccaro et al (eds), CRC Press 2019

2. Avila M, Baaj A, Navarro-Ramirez R, Härtl R “Transforaminal Lumbar Interbody Fusion (TLIF)”: Lumbar Interbody Fusion, Manjica et al (eds), Elsevier 2018

3. Torres-Campa JM, Alimi M, Härtl R “Chapter 3 – Facet Cysts: Is There an Advantage to Treating Synovial Cysts with Minimally Invasive Techniques?”: Controversies in Spine Surgery: MIS versus OPEN, Best Evidence Recommendations, Vaccaro et al (eds), Thieme 2017

4. Härtl R, Parajon A “Chapter 329 – Posterior Thoracic and Lumbar Instrumentation with Historical Overview”: Youmans and Winn Neurological Surgery, 7th edition, HR Winn et al (eds), Elsevier 2017, pp. 2688-97

5. Virk M, Navarro-Ramirez R, Härtl R “Chapter 335 – Minimally Invasive Techniques for Degenerative Disease”: Youmans and Winn Neurological Surgery, 7th edition, HR Winn et al (eds), Elsevier 2017, pp. 2733-42

6. Härtl R, Navarro-Ramirez R, Heiland T “Posterior Cervical Foraminotomy”: Controversies in Neuroendoscopy, Nakaji et al (eds), Thieme, 2017

7. Härtl R, Corredor J “Chapter 16 – Spinal Navigation”: Handbook of Spinal Surgery, 2nd edition, A Baaj et al (eds), Thieme 2015

8. Grunert P , Härtl R, “Thoracoscopic Fusion”: Minimally Invasive Spine Surgery – Surgical Techniques and Disease Management, F Philips et al (eds), Springer 2014 edition, pp. 211-217

9. Härtl R, “The Four Pillars of Minimally Invasive Spine Surgery”: Minimally Invasive Spine Surgery – Techniques, Evidence and Controversies, 1st edition, Härtl R, Korge A (eds), Thieme 2012, pp. 23-49

10. James A , Härtl R, Moraes O, “Posterior Foraminotomy”: Minimally Invasive Spine Surgery – Techniques, Evidence and Controversies, 1st edition, Härtl R, Korge A (eds), Thieme 2012, pp. 109-119

11. Härtl R, “Chapter 3 Introduction – Thoracic Techniques”: Minimally Invasive Spine Surgery – Techniques, Evidence and Controversies, 1st edition, Härtl R, Korge A (eds), Thieme 2012, pp. 175-176

12. Härtl R, “Extreme Lateral Mini-Thoracotomy Approach For Thoracic Spinal Pathologies”: Minimally Invasive Spine Surgery – Techniques, Evidence and Controversies, 1st edition, Härtl R, Korge A (eds), Thieme 2012, pp. 177-189

13. Härtl R, ”Chapter 4 Introduction – Lumbar/Sacral Techniques”: Minimally Invasive Spine Surgery – Techniques, Evidence and Controversies, 1st edition, Härtl R, Korge A (eds), Thieme 2012, pp. 263-265

14. Anand V, Schwartz T, Härtl R, Moshel Y: “Extended Endonasal Approaches to the Craniovertebral Junction” Surgery of the Craniovertebral Junction, 2nd edition, Bambakidis, Dickman (eds), 2012, Chapter 26

15. Härtl R: “Feeding the Injured Brain” Nutrition for Dummies, 5th Edition. 2011

16. Härtl R: “Posterior Lumbar Interbody Fusion.” Fundamentals of Operative Techniques in Neurosurgery, E. Sander Connolly, Jr., Tanvir Choudhri, Judy Huang, Guy M. McKhann, II, Ricardo J. Komotar, J. Mocco 2nd edition, Thieme 2010, 533-537

17. Härtl R: “Graft Harvesting and General Fusion Principles.” Fundamentals of Operative Techniques in Neurosurgery E. Sander Connolly, Jr., Tanvir Choudhri, Judy Huang, Guy M. McKhann, II, Ricardo J. Komotar, J. Mocco 2nd edition, Thieme 2010, 548-551

18. Hofstetter C, Härtl R: “Surgical Use of Spinal Fusion Promoting Substances.” Fundamentals of Operative Techniques in Neurosurgery, E. Sander Connolly, Jr., Tanvir Choudhri, Judy Huang, Guy M. McKhann, II, Ricardo J. Komotar, J. Mocco 2nd edition, Thieme 2010, 617-621

19. Fraser JF, Boockvar J, Härtl R. “Traumatic Injury of the Spine,” Surgery. Basic Science and Clinical Evidence, JA Norton et al. (eds), Springer, 2008.

20. Chapple K, Härtl R. “Traumatic Brain Injury” Surgery. Basic Science and Clinical Evidence JA Norton et al. (eds), Springer, 2008.

21. Knopman J and Härtl R “Head Trauma.” Mental and Neurological Public Health: A Global Perspective, V Patel et al (eds), Elsevier 2008

22. Härtl R, Baskin JJ, Sawin P, Dickman C, Sonntag V, “Surgical Techniques for Stabilization of the Subaxial Cervical Spine (C3-C7).” Operative Neurosurgical Techniques, 5th Edition, Schmidek HH, Roberts DW (eds), Saunders 2006, 1915-1944

23. Härtl R, St. Papadapoulos B. Cervical Disc: Principles & Technique. Surgical Techniques of Spinal Instrumentation, Daniel Kim, Alex Vaccaro, Richard Fessler (eds), Thieme (2006)

24. Härtl R, Marciano F, St. Papadapoulos, Sonntag V: “Cervical disc replacement: Technique and US Trials.” Nonfusion Techniques for the Spine: Motion Preservation & Balance by James H. Maxwell (Editor), Steven L. Griffith (Editor), William C. Welch (Editor) Quality Medical Publishing; 2006

25. Härtl R, Stieg P: “Management of Patients with Neurosurgical Diseases.” Essentials of Surgery J. Becker, A. Stucchi (eds), Saunders 2005, 576-594.

26. Härtl R, Stieg P: “Central Nervous System and Spinal Degenerative Diseases and Infections.” Essentials of Surgery, J. Becker, A. Stucchi (eds), Saunders 2005, 595-599.

27. Härtl R, Stieg P: “Neoplasms.” Essentials of Surgery, J. Becker, A. Stucchi (eds), Saunders 2005, 600-603.

28. Härtl R and Ghajar J: “Neurosurgical Interventions”. Textbook of Traumatic Brain Injury, 2nd Edition. JM. Silver, SC. Yudofsky, TW. McAllister (eds.).2005

29. Härtl R and Ghajar J: “Chapter 241: Acute Traumatic Brain Injury in Adults”. 56th (2004) edition of Conn’s Current Therapy 2004, ”, Rakel RE, Bope, ET (eds.), Saunders 2004

30. Härtl R, Ghajar J: “Does following the Guidelines for the management of severe head injury make a difference in patient outcome?” In Neurotrauma: Evidence-based answers to common questions, Andrews, B and Valadka, AB (eds.), Thieme 2004

31. Härtl R and Ghajar J: “Acute Head Injuries in Adults”. 55th (2003) edition of Conn’s Current Therapy, ”, Rakel RE, Bope, ET (eds.), Saunders 2003

32. Härtl R and Ghajar J: “Acute head injuries in children”. 54th (2002) edition of “Conn’s Current Therapy”, Rakel RE, Bope, ET (eds.), Saunders 2002

33. Härtl R: “Allgemeine Therapieprinzipien und Flussigkeitsbilianzierung” [Fluid therapy in neurosurgical critical care], "Lehrbuch der Neurochirurgischen Intensivmedizin" [Textbook on Neurosurgical Critical Care], J Piek (ed.), 1999


Abstracts

1. 14th Annual AOSNA Fellows Forum, Banff Springs, Alberta, Canada, March 31 – April 2, 2016
• Abstract: Total Disc Replacement Using Tissue-Engineered Intervertebral Discs: In Vivo Outcome In A Canine Model

2. 5th International Congress on Biotechnologies for Spinal Surgery (BIOSPINE), Berlin, Germany, April 8-11, 2015
• Abstract: Tissue-Engineered Intervertebral Discs: In Vivo Outcome in the Rodent Spine
• Abstract: Riboflavin Cross-Linked Collagen Get for the Repair of Annular Defects in Intervertebral Discs: An In Vivo Study

3. American Society for Reconstructive Microsurgery Annual Meeting, Paradise Island, Bahamas, January 24-27, 2015
• Abstract: Optimizing Successful Outcomes in Complex Spine Reconstruction Using Local Muscle Flaps

4. Biomedical Engineering Society (BMES) Annual Meeting, Atlanta, GA, September 25-28, 2013
• Abstract: Injectable Riboflavin-Crosslinked Collagen Gels for Annulus Fibrosus Repair

5. Lumbar Spine Research Society, Chicago, Illinois, April 11-12, 2013
• Abstract: Annular repair using high density collagen gel: In vivo outcome in a rodent spine model
• Abstract: Tissue-engineered intervertebral discs: In vivo outcome in the rodent spine

6. 11th Annual AOSpine North America Fellows Forum, Banff, Canada, March 14-17, 2013
• Abstract: A Novel Method to Measure the Nucleus Pulposus Hydration and Size In Degenerated Intervertebral Discs Based on Quantitative MRI Analysis

7. Orthopaedic Research Society (ORS) Annual Meeting, San Antonio, TX, January 26-29, 2013
• Abstract: Repair of Rat Annulus Fibrosus Using High-Density Collagen Gels In Vivo
8. 4th International Consensus Conference on Concussion in Sport, Zurich, Switzerland, November 1, 2012
• Abstract: Diffusion Tensor and Susceptibility-Weighted Imaging in Concussion Assessment of National Football League Players

9. Biomedical Engineering Society (BMES) Annual Meeting, Atlanta, GA, October 24-27, 2012

Video:

Roger Hartl, M.D., the Chief of Spine Surgery at The Brain and Spine Center of NewYork-Presbyterian/Weill Cornell Medical Center in New York City, discusses surgical procedures to treat radiculopathy, which is pain caused usually by a herniated disc compressing nerves in the body.

Dr. Roger Hartl: Cervical Herniated Disc and Radiculopathy,


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