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Asst Prof Ooi Oon Cheong

  • Consultant, Thoracic Surgery, Department of Cardiac, Thoracic and Vascular Surgery, National University Heart Centre, Singapore
  • Assistant Professor, Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore
MB BCh BAO (Ireland), MMed (Surg)(S'pore), AFRCS (Ireland), FRCS (CTh), FAMS
Cardiothoracic Surgery (Heart)
Extracorporeal Membrane Oxygenation, Intensive Care, Lung Surgery, Minimally Invasive Cardiac Surgery, Thoracic Surgery
Special Interests:
Minimally Invasive Chest Surgery for Lung and Pleura


Assistant Professor Ooi Oon Cheong is presently a Consultant Surgeon with the Department of Cardiac, Thoracic and Vascular Surgery at National University Heart Centre, Singapore. He is also an assistant professor in the Department of Surgery, Yong Loo Ling School of Medicine, National University of Singapore. In addition, he is a Member of the Chapter of Cardiothoracic Surgeons of the Academy of Medicine, Singapore.

Asst Prof Ooi graduated MBBCh from University College Cork, National University of Ireland, in 1995. He then completed his training in General Surgery in Galway, Ireland. He underwent sub-specialty training in Cardiothoracic Surgery at the National University Hospital, Singapore with further training at the London Chest Hospital, London, UK, and Mayo Clinic, Rochester, USA, before returning to Singapore in 2006.

He is an Associate Fellow of the Royal College of Surgeons in Ireland, Fellow of the Royal College of Surgeons of Edinburgh, and Fellow of the Academy of Medicine, Singapore.

Asst Prof Ooi's works have received various awards, including Health Manpower Development Program from Singapore Ministry of Health & National University Hospital, Excellent Service Award, Thoracic Surgery Foundation for Research and Education Scholarship, and The National Research Foundation - Ministry of Health Healthcare Research Scholarship for Clinical Investigation.

​Asst Prof Ooi's special interests are in General Thoracic Surgery, Minimally Invasive Chest Surgery for Lung and Pleura, mangement of Extracorporeal Membrane Oxygenator, and Cardiothoracic Surgical Intensive Care.


  • 2017 - ​Health Manpower Development Program from Singapore Ministry of Health & National University Hospital

Journals & Publications

Selected Publications: 
1. Effect of Renin-Angiotensin System Inhibitors on Acute Kidney Injury Among Patients Undergoing Cardiac Surgery: A Review and Meta-Analysis. Han Zhou , Jingui Xie, Zhichao Zheng, Oon Cheong Ooi, Haidong Luo. Semin Thorac Cardiovasc Surg. 2020 Nov 26:S1043-0679(20)30419-6. doi: 10.1053/j.semtcvs.2020.11.024
2. Zhang Y, Luo H, Wang H, Zheng Z, Ooi OC. Validation of prognostic accuracy of the SOFA score, SIRS criteria, and qSOFA score for in-hospital mortality among cardiac-, thoracic-, and vascular-surgery patients admitted to a cardiothoracic intensive care unit. Card Surg. 2020;35(1):118-127. doi: 10.1111/jocs.14331. Epub 2019 Nov 11. PMID: 31710762 
3. Xie J, Cheng G, Zheng Z, Luo H, Ooi OC. To extubate or not to extubate: Risk factors for extubation failure and deterioration with further mechanical ventilation. J Card Surg. 2019;34(10):1004-1011. doi:10.1111/jocs.14189. Epub 2019 Aug 2. PMID: 31374585
4. See KC, Ong V, Teoh CM, Ooi OC, Widjaja LS, Mujumdar S, Phua J, Khoo KL, Lee P, Lim TK. Bedside pleural procedures by pulmonologists and non-pulmonologists: a 3-year safety audit. Respirology. 2014 Apr;19(3):396-402. doi: 10.1111/resp.12244. Epub 2014 Feb 10
5. K.K. Poh, O.C. Ooi. Interatrial septal thrombus-in-transit despite severe mitral regurgitation. 2011;104:623-4. Epub 2010 Jul 16
6. Oon Cheong Ooi, Felix Woitek, Raymond Ching Chiew Wong, Chuen Neng Lee, Uwe Klima, Theo Kofidis. Intra-atrial embolus trapped in patent foramen ovale before systemic embolization. J Thorac Cardiovasc Surg. 2010;139:e49-50. Epub 2009 Mar 26
7. Ooi OC, Al Habib HF, Almsherqi ZA, El Oakley RM. Stem cell transplantation: potential impact on heart failure. Cell Tissue Bank. 2006;7(4):307-14. Epub 2006 Sep 6
8. El Oakley RM, Lee CN, Ooi OC. Anastomosis of small arteries: implications for coronary artery grafts in asians. Asian Cardiovasc Thorac Ann. 2006 Apr;14:164-5
9. Sim EK, Haider HK, Aziz S, Ooi OC, Law PK. Myoblast transplantation on the beating heart. Int Surg. 2005 Jul-Aug;90(3):148-50
10. Ooi OC, Grignani R, Sim EK. Pericardial suspension to prevent encroachment of emphysematous lungs in cardiac surgery. J Card Surg. 2004;19:184-5
For more publications, click here.

Professional Memberships

  • Chapter of Cardiothoracic Surgeons, College of Surgeons Singapore
  • College of Surgeons, Singapore
  • Academy of Medicine, Singapore
  • Society of Intensive Care Medicine, Singapore
  • Royal College of Surgeons Edinburgh, United Kingdom
  • Royal College of Surgeons in Ireland