A/Prof Ivan Ng Hua Bak

28 years of experience




MBBS, FRCS (Edin), FRCS (Surgical Neurology), FAMS

What I do

A/Prof Ivan Ng Hua Bak provides clinical services such as:
- Neurovascular surgery
- Accidents: Neurotrauma surgery
- Cancers: Neuro-oncology surgery
- Intra-operative neuro-imaging for complex brain and spine conditions
See more [ + ]- Virtual reality planning and navigation for neurosurgery
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Pick a clinic location & select time slot to make an appointment.
If your preferred time slot is not available, please call +65 6473 8123 for us to assist you further.

Clinic Locations

Neurosurgery Partners Brain + Spine Solutions
Mt Elizabeth Novena Specialist Centre,#10-60/62
38 Irrawaddy Road, S 329563

Neurosurgery Partners Brain + Spine Solutions
Gleneagles Medical Centre #10-06
6 Napier Road 
Singapore 258499

Professional Statement

Associate Professor Ivan Ng Hua Bak  is active in research and has special interest in the field of neurotrauma, neurovascular surgery, neuro-oncology, intra-operative neuroio-maging for complex brain and spine conditions and Virtual reality planning and navigation for neurosurgery.
Associate Professor Ivan Ng is also an active educator, having been involved in undergraduate and allied health education as well as trained neurosurgeons who have now been appointed to faculty positions in Vietnam, Malaysia, Philippines, Paraguay, Egypt, Bangladesh, China, India, USA, Czech Republic, Switzerland and Nepal. He has also conducted many neurosurgical courses to teach neurosurgery and is the course ... See more [ + ]chairmen for the yearly Aesculap Academy in Minimally Invasive Neurosurgery, and the AO Foundation course (Asia-Pacific) in neurotrauma. In addition he continues to lecture extensively all over the world on neurosurgery.
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Languages Spoken

English, Mandarin


National University of Singapore, Faculty of Medicine

Awards and Publications

Norman Dott Medal
Douglas Miller Travelling Fellowship, American Association of Neurological Surgeons (AANS) / Congress of Neurological Surgeons, 2002
HMDP Scholarship in Neurosurgery, University of Cambridge, UK, 1998-2000
Dermatology Book Prize 1990, Dermatological Society of Singapore (Undergraduate)
Third Prize, Free Paper Competition, 9th International Congress of Recent Advances in Neurotraumatology
ASEAN Young Neurosurgeon Award, Best Clinical Paper entitled “Apoptosis in Cerebral Contusions”, Bangkok 8th ASEAN Congress of Neurological Surgery 1999
Young Investigator’s Award 32nd Singapore-Malaysia Congress 1998, Best Clinical Paper entitled “Apoptosis is induced in Closed Head Injury in Humans"
Best Clinical Paper entitled “Patients who talk and Deteriorate – A New Look at an Old Problem”, Third Overall, International Conference on Recent Advances in Neurotraumatology, 2002
See more [ + ] Technology Enterprise Challenge Award 2003 Publications:
Associate Professor Ivan Ng has to date contributed 5 book chapters and published over 120 research papers on his areas of interest. 1. CLOSED HEAD INJURIES IN CHILDREN FOLLOWING THE USE OF A SARONG CRADLE. I Ng, E Seow, L Lee, L Ho; Singapore Medical Journal 1997; 38: 467-468. 2. OUTCOME OF THE SEVERELY HEAD INJURED MANAGED ON A TRAUMATIC BRAIN INJURY PROTOCOL. I Ng, TWK Lew, TT Yeo, Seow WT, KK Tan, PL Ong. Ann Acad Med1998; 27: 332-339. 3. THE CORRELATION OF OUTCOME TO THE LEVEL OF CEREBRAL PERFUSION PRESSURE ACHIEVED- I.Ng, TWK Lew, Seow WT, Yeo TT, KK Tan, PL Ong. Proceedings of the 11th International Congress of Neurological Surgery. Moduzzi Editore 11:1293- 1299. 1997. 4. APOPTOSIS IS INDUCED FOLLOWING CLOSED HEAD INJURY IN HUMANS. I Ng, Yeo TT, R Soong, WY Tang, PL Ong, T Lew, HS Goh, and DR Smith. Ann Acad Med 1999; 28: 263-5. 5. APOPTOSIS OCCURS FOLLOWING CEREBRAL CONTUSIONS IN HUMANS. I Ng, TT Yeo, WY Tang, R Soong, PY Ng, DR Smith. Neurosurgery 2000; 46: 949-956. 6. CORRELATION OF FAVOURABLE PATIENT OUTCOME IN A STANDARDIZED HEAD INJURY PROTOCOL TO THE LEVEL OF CEREBRAL PERFUSION PRESSURE ACHIEVED. I Ng, TWK Lew, TT Yeo, WT Seow, KK Tan, PL Ong. Critical Care Medicine, Jan 1997 Vol 25, No.1 (Suppl) Pg A74. 7. DECISION ANALYTIC APPROACH TO SEVERE HEAD INJURY MANAGEMENT. David Hamanec, Tze-Yun Leong, Suman Sundaresh, Kim Leng Poh, Tseng Tsai Yeo, Ivan Ng, Thomas Lew. Proc AMIA Symp 1999: 271-5. 8. SPINAL CORD INJURY. I Ng, R.J.C Laing; book chapter in Notes in Neuroanaesthesia and Critical Care edited by A. Gupta and A Sommers published by Greenwich Medical Media Sept 2000. 9. INVITED BOOK REVIEW: NEUROSURGERY- SCIENTIFIC BASIS FOR CLINICAL PRACTICE. Alan Crockard, J Hoffman in British Journal of Neurosurgery 2001; 15 (1): 78. 10. PROSPECTIVE STUDY OF CLINICAL AND RADIOLOGICAL OUTCOME AFTER ANTERIOR CERVICAL DISCECTOMY. RJC Laing, I Ng, PJ Hutchinson, HM Br J Neurosurg. 2001 Aug; 15 (4): 319-23. 11. ENDOSCOPIC ASSISTED MICRONEUROSURGERY FOR RUPTURED ANEURYSMS. ECM Wang, I Ng, PY Ng, PL Ong. J Clin Neuroscience 2003, 10; 2: 174-176. 12. SEVERE TRAUMATIC BRAIN INJURY PROGRAMME AT THE NNI. I Ng. Neus-Link Vol 1/Dec2000-Feb 2001, Pg 6. 13. THE USE OF PALMAR LASER DOPPLER FLOWMETRY AS AN INTRA-OPERATIVE ADJUNCT IN VIDEO-ASSISTED ENDOSCOPIC SYMPATHECTOMY. I Ng, TT Yeo. Neurosurgery 52: 127-131. 14. OUTCOME FROM MODERATE AND SEVERE TRAUMATIC BRAIN INJURY IN THE GERIATRIC POPULATION. BK Gan, J Lim, I Ng.  Annals Acad Med June 2004; 33: 63-7. 15. PARP IS EXPRESSED FOLLOWING CEREBRAL CONTUSIONS IN HUMANS. E Yap, I Ng, J Lim, Ang BT. J Neurotrauma 2002; 549. 16. POLY-ADP EXPRESSION IN TRAUMATIC BRAIN INJURY. Ang BT, Tan WL, E Yap, I Ng. J Neurosurg July 2003; 99: 125-130. 17. SPERMINE REDUCES INFARCTION AND NEUROLOGICAL DEFICIT FOLLOWING A RAT MODEL OF MCA OCCLUSION: A MRI STUDY. Shirhan Md, M Moochala, PY Ng, J Lu, KC Ng, AL Teo, E Yap, I Ng, P Hwang, T Lim, YY Sitoh, H Rumpel, R Jose, E Ling. Neuroscience 124(2004) 299-304. 18. BLOOD BRAIN BARRIER DISRUPTION FOLLOWING TRAUMATIC BRAIN INJURY: THE ROLE OF TIGHT JUNCTION PROTEINS. I Ng, E Yap, Tan WL, NY Kong. Annals Acad Med 2003; S63-S66. 19. OUTCOME OF MODERATE AND SEVERE TRAUMATIC BRAIN INJURY AMONGST THE ELDERLY IN SINGAPORE. Annals Acad Med 2004; 33: 63-67. 20. IMAGING COLLATERAL CIRCULATION: MRA AND PERFUSION MR- IMAGING AT 3T. Archives of Neurology. Vol 62; Mar 2005, Pg 492. CCT Lim, C Lim, I.Ng. 21. EFFECTS OF HEAD POSTURE ON CEREBRAL HEMODYNAMICS: ITS INFLUENCES ON INTRACRANIAL PRESSURE, CEREBRAL PERFUSION PRESSURE AND CEREBRAL OXYGENATION. Neurosurgery 2004; 54: 593-598. 22. PATIENT WHO TALK AND DETERIORATE – A NEW LOOK AT AN OLD PROBLEM. JE Tan, I Ng, J Lim, HB Wong, TT Yeo. Ann Acad of Med 2004; 33 (4): 489-493. 23. SURGICAL MANAGEMENT OF RUPTURED AND UNRUPTURED SYMPTOMATIC POSTERIOR INFERIOR CEREBELLAR ARTERY ANEURYSMS. DNS Liew, PY Ng, I. Ng. Br J Neurosurgery 18:16:608-612, 2002. 24. APOPTOSIS IN ACUTE BRAIN INJURY- A PRIMER FOR INTENSIVE CARE PHYSICIANS. J Wong, Ng WH, ZW Feng, I.Ng. Neurocrit Care. 2005:3(2):177-82. Review.  25. LINEAR CORRELATION BETWEEN STABLE INTRACRANIAL PRESSURE DECREASE AND REGIONAL CEREBRAL OXYGENATION IMPROVEMENT FOLLOWING MANNITOL ADMINISTRATION IN SEVERE ACUTE HEAD INJURY PATIENTS. JGasco, J Sendra, J Lim, I Ng. Acta Neurochirugica Suppl 2005; 95:73-7. 26. CHANGES IN CEREBRAL HEMODYNAMICS AND CEREBRAL OXYGENATION DURING SURGICAL EVACUATION FOR HYPERTENSIVE PUTAMINAL HEMORRHAGE.  I Ng, E Yap, J Lim. Acta Neurochirugica Supp 2005: 95:97-101. 27. BRAIN TISSUE OXYGENATION - A CASE FOR ROUTINE MONITORING IN THE NEUROCRITICAL CARE? I Ng, J Wong, and Kah Keow Lee. Acta Neurochirugica Supp : 2005; 95:447-51. 28. CEREBROSPINAL FLUID OREXIN IN SUBARACHNOID HEMORRHAGE. Beng Ti Ang, Wan Loo Tan, Joyce Lim, Ivan Ng. J Clin Neurosci. 2005 Sep;12(7):758-62. 29. HIF-1 EXPRESSION IN CEREBRAL ARTERIOVENOUS MALFORMATIONS. I Ng, E Yap, Ng PY, WL Tan. J Clin Neurosci. 2005 Sep;12(7):794-9.  30. CEREBRAL REVASCULARISATION- WHERE ARE WE NOW? (Editorial Review). Kirkpatrick PJ, I Ng. Journal Neurol, Neurosurg, Psych 2005;76:463-465. 31. DEMOGRAPHIC PROFILES OF ADULT SEVERE TRAUMATIC BRAIN   INJURY PATIENTS: IMPLICATIONS FOR HEALTHCARE. KK Lee, WT Seow, I.Ng. Singapore Med J. 2006 Jan;47(1):31-6. 32. The implications of Multi-modal Neuro- Monitoring for Nursing. Lee KK, I.Ng. Sing Nursing Journal.  32;4:5-11, 2005. 33. Volume Visualization for Surgical Planning System.
Chan CF, I Kassim, C Lo, Kwoh CK, I.Ng.
Journal of Mechanics in Med & Biol. Vol 7, No 1(2007) 55-63. 34. MR Regional perfusion Imaging: visualizing functional collateral circulation.  T Lim, E Petersen, I.Ng, P Hwang, F Hui, X Golay. AJNR Am J Neuroradiol. 2007 Mar;28(3):447-8. 35. DNA vaccination against neurite growth factors improves neuroplasticity in a rat middle cerebral artery occlusion model. Zhu ZB, Wang TH, WL Tan, E Yap, YL Lee, I.Ng. Submitted to Stroke. 36. Pressure Reactivity and Decompressive Craniectomy.
ECM Wang, BT Ang, J Lim, J Wong, I.Ng.
BJNS 2005;20( 1)24-30. 37. GENDER DIFFERENCES IN OUTCOME FOLLOWING SEVERE TBI IN A PREDOMINANTLY ASIAN POPULATION.  I.Ng, J Lim, Lim HB, Lee KK. BJNS;2006;20(2):1-6. 38. Experimental analysis on severe head injury outcome prediction- a preliminary study. Hongli Yun, Guo Liang Li, Tze-Yun Leong, Vellasisamy Kuralmani, Boon Chuan Pang, Beng Ti Ang, Kah Keow Lee, Ivan Ng. Submitted to PMIA. 39. Diffusion tensor imaging in a symptomatic patient with an intra-axial arachnoid cyst. J Thorat, YY Sitoh, HC Chin, I.Ng.
BJNS April 2006( 20) 2:1-3. 40. Radhziah S, Lee C K, Ng I (Full article available).
Tension pneumoventricle.
J Clin Neurosci. 2006, Oct 13 (8): 881-3. 41. Al-Rawi P, Turner C L, Waran V, Ng I, Kirkpatrick P J (Full article available).
A randomized trial of synthetic patch versus direct primary closure in carotid endartectomy.
Neurosurgery 2006 Oct ,  59(4): 822-8. 42. T Minh, PYK Hwang, KC Nguyen, I. Ng (Full article available).
Neurosurgical management of intracranial aneurysms following unsuccessful or incomplete endovascular therapy.
Br J Neurosurgery 2006, Oct 20 (5): 306-311. 43. Pang BC, Kuralmani V, Leong TY, Joshi R, Yin H, Lee KK, Ang BT, Li J, Ng I. (Full article available).
A hybrid outcome prediction model for severe traumatic brain injury.
J Neurotrauma 2007, Jan 24(1): 136-146. 44. Ang BT, Wong J, Lee KK, Wang E, Ng I. (Full article available).
Temporal changes in cerebral vascular reactivity with tissue oxygenation in severe head injury.
J Neurol Neurosurg Psychiatry 2007, Mar, 78(3): 298-302. 45. Ng WH, Wang E, Ng I. (Full article available).
Multi-media Messaging Service (MMS) teleradiology in the provision of emergency neurosurgery services.
Surg Neurol 2007, Apr, 67 : 338-341. 46. Low D, Ng I, Ng W H.
Awake craniotomy under local anaesthesia and monitored conscious for resection of brain tumours in eloquent cortex – outcomes in 20 patients.
Ann Acad Med Singapore 2007, May, 36(5) : 326–331. 47. Thorat D, I.Ng.
Acute Sinus Thrombosis following ingestion of a herbal tonic: case report.
J Stroke Cerebrovasc Dis. 2007 Sep-Oct;16(5):232-5. 48. Thorat JD, Wang EC, Lee KK, Seow WT, Ng I.
Barbiturate therapy for patients with refractory intracranial hypertension   following severe traumatic brain injury. Its effects on tissue oxygenation, brain temperature and autoregulation.
J Clin Neurosc 2008 Feb;15(2) 143-8.   49. Virtual Reality Simulation for Skull Base Surgery.
Peter Hwang, RA Kokro, CK Lee, I.Ng
Asian Journal of Neurosurgery 2007;1:1-8 50.  A Collaboratiive Virtual Reality Environment for Neurosurgical Planning & Training.
RA Kokro, Stadie A, E Schwandt, Reisch R, Charalampaki, I.Ng, Yeo TT, Hwang P, Sierra L
Neurosurgery[ ONS Suppl 2]: ONS379-ONS391, 2007. 51. Combinatorial-approached neuroprotection using pan-caspase inhibitor and poly(ADP-ribose) polymerase (PARP) inhibitor following experimental stroke in rats;is there additional benefit? Yap E, Tan WL, Ng I, Ng YK.
Brain Res. 2007 Dec 23; 2: 52. Effects of glycaemic control on cerebral neurochemistry in primary intracerebral haemorrhage.
Ho CL, Ang CB, Lee KK, Ng IH.
J Clin Neurosci. 2008 Apr 15(4):428-33.    53. Optimization of ventricular catheter placement via posterior approaches: a
virtual reality simulation study.
Lee CK, Tay LL, Ng WH, Ng I, Ang BT.
Surg Neurol. 2008 Sept;70(3):274-7. 54. Craniospinal Dissemination in Teratocarcinomasarcoma. Case Report. CC Tchoyoson Lim, Anuradha Thiagarajan, Chee Seng Sim, Mark Khoo, Thomas Shakespeare, Ivan Ng.  J Neurosurg 109:321-324, Aug 2008.

55. Outcome of Severe Head injured patients admitted to intensive care during weekday shifts compared to nights and weekends. Lee KK, I.Ng, BT Ang.  Ann Acad Med Singapore  2008, May 37(5)390-6.
56. Cerebral Oxygenation, vascular reactivity and neurochemistry following decompressive craniectomy for severe traumatic brain injury.
Ho CL. Wang CM, Lee KK, I.Ng, BT Ang.J Neurosurg 108(5):943-9 May 2008. 57. Low D, Kuralmani V, Ng SK, Lee KK, Ng I, Ang BT. Prediction of outcome
utilizing both physiological and biochemical parameters in severe head injury. J
Neurotrauma. 2009 Aug;26(8):1177-82. 58. Lee KY, Ang BT, Ng I, Looi A. Stereotaxy for surgical navigation in orbital
surgery. Ophthal Plast Reconstr Surg. 2009 Jul-Aug;25(4):300-2. 59. Singh R, Ng WH, Lee KE, Wang E, Ng I, Lee WL. Telemedicine in emergency
neurological service provision in Singapore: using technology to overcome
limitations. Telemed J E Health. 2009 Jul-Aug;15(6):560-5. 60. Khu KJ, Ng I, Ng WH. The relationship between parasagittal and falcine
meningiomas and the superficial cortical veins: a virtual reality study. Acta
Neurochir (Wien). 2009 May 8. [Epub ahead of print] 61. Chan F, Kassim I, Lo C, Ho CL, Low D, Ang BT, Ng I. Image-guided robotic
neurosurgery--an in vitro and in vivo point accuracy evaluation experimental
study. Surg Neurol. 2009 Jun;71(6):640-7, discussion 647-8. Epub 2009 Mar 28. 62. Ng I, Hwang PY, Kumar D, Lee CK, Kockro RA, Sitoh YY. Surgical planning for microsurgical excision of cerebral arterio-venous malformations using virtual reality technology. Acta Neurochir (Wien). 2009 May;151(5):453-63; discussion 463. 63. Ng WH, Hy JW, Tan WL, Liew D, Lim T, Ang BT, Ng I. Aquaporin-4 expression is increased in edematous meningiomas. J Clin Neurosci. 2009 Mar;16(3):441-3. Epub 2009 Jan 18. 64. Rumpel H, Chan LL, Tan JS, Ng IH, Lim WE. Clinical functional magnetic reso-nance imaging for pre-surgical planning- the Singapore General Hospital experience with the first 30 patients.  Annals Acad Medicine Singaproe 2009 Sep,38(9):782-6. 65. Dinesh SK, Thomas J, Ng I. Intra-operative computed angiography in cerebral aneurysm surgery: a pilot feasibility study. Neurosurgery. 2010 Feb;66(2):349-52. 66. Low D, Lee CK, Dip LL, Ng WH, BT Ang, Ng I. Augmented reality neurosurgi-cal planning and navigation for surgical excision of parasagittal, falcine and convexity meningiomas. Br J Neurosurg. 2010 Feb;24(1), 69-74. 67. Dex-ray augmented reality neurosurgical navigation with a handheld video probe. Kockro RA, TT Yeo, Ng I, P Hwang, Zhu C, Agusanto K, Hong LX, Serra L. Neurosurgery 2009 Oct 65( 4):795-807.

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Professional Positions and Memberships

Senior Consultant Neurosurgeon, Department of Neurosurgery at the National Neuroscience Institute (NNI)
Senior Consultant, Neurosurgeon, Department of Neurosurgery at Singapore General Hospital (SGH)
Head, Department of Neurosurgery at the National Neuroscience Institute (NNI)
See more [ + ] Head, Neurosurgeon, Department of Neurosurgery at Singapore General Hospital (SGH)
Deputy Director, National Neuroscience Institute (NNI)
Co-Director, Brain and Behavior program at the Duke - NUS Graduate Medical School
Co-Director, Neurointensive Care Unit Tan Tock Seng Hospital
Director, Khoo-teck-Puat NNI Integrated Neuroscience centre at Singapore General Hospital
Chairman, Chapter of Neurosurgeons, College of Surgeons Singapore, 2007 – 2011
Former Vice-President of the Asian Congress of Neurosurgeons, 2001 – 2007
Asst Editor, Young Neurosurgeons’ Forum, WFNS
Associate Editor of CNS Oncology
Principal Investigator, Acute Brain Injury Laboratory, NNI
Exco Member, Society of Intensive Care Medicine Singapore
Exco Member, Asia-Pacific Brain Injury Consortium
Member, Clinical Neuroscience Society
Member, ASEAN Society of Neurosurgeons

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Accredited Hospitals

Gleneagles Hospital
Mount Elizabeth Hospital
Mount Elizabeth Novena Hospital
See more [ + ]Parkway East Hospital
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Insurances Accepted

Cigna / IXChange
Parkway Shenton
Shenton Insurance