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Department of Surgery

General Surgery

Homer Tien
Dr. Homer Tien, MD, M.Sc., FACS, FRCSC

Associate scientist

Sunnybrook Health Sciences Centre
2075 Bayview Ave., Room H1 71
Toronto, ON
M4N 3M5

Phone: 416-480-6100 ext. 65850
Fax: 416-480-5851

Administrative Assistant: Carla Routledge
Phone: 416-480-5850


  • B.A., 1989, biochemistry, Queen’s University, Kingston, Canada
  • MD, 1992, McMaster University, Canada
  • MSc, 2007, clinical epidemiology, University of Toronto, Canada

Appointments and Affiliations:

  • Associate scientist, Evaluative Clinical Sciences, Tory Trauma Program, Sunnybrook Research Institute
  • President and CEO, Ornge
  • Associate professor, department of surgery, faculty of medicine, U of T
  • Colonel, Canadian Forces Health Services
  • Chief of reserve forces specialists
  • Major Frederick Banting Chair in Military Trauma Research

Research Foci:

  • Health services
  • Combat trauma care and war surgery
  • Coagulopathy and bleeding
  • Prehospital Trauma Care and Transport
  • Time-to-treatment and outcomes

Research Summary:

The focus of Dr. Tien's clinical and research work has been on improving trauma care to populations working and living in remote areas. These include soldiers injured on the battlefield, First Nations people living in remote communities, and Canadians living in rural and remote locations far from urban trauma centres. His interests include telemedicine, Point-of-Care testing, and prehospital treatment of trauma associated coagulopathy and bleeding.

Selected Publications:

See current publications list at PubMed.

  1. Pannell D, Brisebois R, Talbot M, Trottier V, Clement J, Garraway N, McAlister V, Tien HC. Causes of death in Canadian Forces members deployed to Afghanistan and implications on tactical combat casualty care provision. J Trauma. 2011 Nov;71(5 Suppl 1):S401–7.
  2. Tien HC, Jung V, Pinto R, Mainprize T, Scales DC, Rizoli SB. Reducing time-to-treatment decreases mortality of trauma patients with acute subdural hematoma. Ann Surg. 2011 Jun;253(6):1178–83.
  3. Tien HC, Farrell R, Macdonald J. Preparing Canadian military surgeons for Afghanistan. CMAJ. 2006;175(11):1365–66. Tien HC, Jung V, Rizoli SB, Acharya SV, Macdonald JC. An evaluation of tactical combat casualty care interventions in a combat environment. J Am Coli Surg. 2008;207(2):174–78.
  4. Tien HC, Acharya SV, Redelmeier DA. Preventing deaths in the Canadian military. Am J Prev Med. 2010;38(3):331–9.

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