Department of Surgery
School of Medicine Queen's University
 

Dr David Yen

Dr David Yen Orthopaedic SurgeonUniversity Position:
Professor
 
Current Appointment:
Attending Staff, Kingston General Hospital
Attending Staff, Hotel Dieu Hospital
 
Areas of Clinical Interest:
Spine, clinical mechanics
 

Areas of Research Interest:
Spine surgery research outcomes, biomechanics of spinal instrumentation, thromboembolism prophylaxis, education studies

Contact Information:
Kingston General Hospital, Douglas 5
Kingston, ON K7L 2V7
Tel: 613.549.6666 x. 2545
Fax: 613.548.2518

Click here to email Dr. Yen

 
Fellowship:
University of Toronto, Clinical Spine Fellow, 1992
 
Residency:
Queen's University, 1990
 
Medical School Graduation:
University of Toronto, 1985

Professional Memberships:
 Royal College of Physicians and Surgeons of Canada
 Canadian Orthopaedic Association
 Canadian Spine Society
 Ontario Medical Association

Other Academic and Professional Appointments:
 2008 Member of the Kingston General Hospital Board of Directors
 2006-2008  Member of the Hotel Dieu Hospital Board of Directors 
 2006 Vice-President of KGH & HDH hospital staff association
 2006 Tenure, Queen's University
 1998-2004 Training Program Director, Division of Orthopaedic Surgery, Queen's University
 1995-1998 Service Chief, Division of Orthopaedic Surgery, Kingston General Hospital
 
Peer-Reviewed Journals:
1.   Schuringa, P., Yen, D. (1999). Home prophylactic warfarin anticoagulation program
after hip and knee arthroplasty. Can J Surg, Vol. 42, No. 5, 360-362.

2.  Mayman, D., Yen, D. (1999). Maximizing use of a surgical clinic for referrals of patients having back problems. Can J Surg, Vol. 42, No. 2, 117-119.

3.   Lysack, J., Dickey, J., Dumas, G., Yen, D. (2000). A continuous pure moment loading
apparatus for biomechanical testing of multi-segment spine specimens. Journal of
Biomechanics, Vol. 33, No. 6, 765-770.

4.    Houlden, R., Yen, D. (2000). The practice audit: addressing the difference between
knowing and doing. Annals, RCPSC, Vol. 33, No. 4, 270-272.

5.   Yen, D. (2000). Effects of a pre-operative assessment clinic with same day admission surgery. Annals, RCPSC, Vol. 33, No. 6, 353-355.

6.   Yach, J., Yen, D. (2000). A shortened course of anticoagulation to treat deep venous thrombosis after total joint arthroplasty. Clin Invest Med, Vol. 23, No. 5, 318-321.

7.   Charles, M., Yen, D. (2000). Properties of a hybrid plaster-fiberglass cast. Can J Surg, Vol. 43, No. 5, 365-367.

8.   Lysack, J., Yen, D., Dumas, G. (2000) In vitro flexibility of an experimental pedicle
screw and plate instrumentation system on the porcine lumbar spine. Medical      
Engineering and Physics, Vol. 22, No. 7, 461-468.

9.   Houlden, R., Collier, C., Yen, D. (2001) Cooking from scratch: Teaching residents
lifelong learning skills. Annals, RCPSC, Vol. 34, No. 7, 473-476.    

10. Yen, D., Kuriachan, V., Yach, J., Howard, A. (2002) Long term outcome of anterior
decompression and spinal fixation using the Wellesley Wedge for thoracic and lumbar
spinal metastasis. J Neurosurg: Spine, Vol. 96, 6-9.

11. Yen, D., Hedden, D. (2002) Multiple vertebral compression fractures in a
patient treated with corticosteroids for Cystic Fibrosis.  Can J Surg, Vol. 45, No. 5,
383-384.

12. Campbell, A., Yen, D. (2003) Late neurological deterioration after nonoperative
treatment of A Chance  fracture in an adolescent. Can J Surg, Vol. 46, No.5, 383-385.

13. Yen, D. (2005) Limitations of Isokinetic Testing to Determine Shoulder Strength  after Rotator Cuff Repair. The IOWA OrthopaedicJournal, Vol. 25, 141-144.

14. Athiviraham, A, Yen, D. (2007). Is Spinal Stenosis Better Treated Surgically or Non-
surgically? Clin Orthop Relat Res, Vol. 458, 90-93.

15. Athiviraham, A., Yen, D., Scott, C.,Soboleski, D. (2007). Clinical Correlation of 
Radiological Spinal Stenosis after Standardization for Vertebral Body Size. Clinical
Radiology, Vol. 62, 776-780.

16. Yen, D., Weiss, W. (2007). Results of Adjusted-Dose Heparin for Thromboembolism
Prophylaxis in Knee Replacement Compared to Those Found for its Use in Hip
Fracture Surgery and Elective Hip Replacement. The IOWA OrthopaedicJournal, Vol.
27, 47-51.

17. Weiss, W., Bardana, D., Yen, D. (2008). Anterior surgical treatment for an
extension-distraction spine injury: A case report. Journal of Trauma, Post-acceptance
E. Pub, February 15, 2008.  

18. Weiss, W., Bardana, D., Yen, D. (2008). Delayed presentation of fat embolism
syndrome after intramedullary nailing of a fractured femur: A case report. J  Trauma,
Post-acceptance E. Pub, February 15, 2008.
 
19. Dang, Y., Yen, D., Hopman, W. (2008). Postoperative Bed Rest Improves the
Alignment of Thoracolumbar Burst Fractures Treated with the AO Spinal Fixator. In press, Can J Surg  
 

Invited Journal Articles:
1. Yen, D. (1992). Current concepts in the prevention, detection and treatment of deep
vein thrombosis in total hip and knee replacement. Current Opinion in Rheumatology,
Vol. 4, No. 2, 210-215.

2. Yen, D. (1998). Red flags in low back pain. Patient Care, Vol. 9, No. 4, 20-22.

3. Yen, D. (2004). The Orthopaedic Surgery training program at Queen?s University.
Canadian Orthopaedic Association Bulletin, No. 67, 24.

4. Yen, D. (2008). Waiting for Medical Care 2007 Conference. Spinal Columns, Vol. 8,
No. 1.

5. Yen, D. (2008). Lumbar spinal stenosis surgery. Spinal Columns, Vol. 8, No. 2.

6. Yen, D. (2008). Referrals to a Spine Surgeon, Spinal Columns, Vol. 8, No. 3.

7. Yen, D. (2008).Indications and results of CT and MR?s done in Ontario, Spinal
Columns, Vol. 8, No. 4.


Abstracts:
1. Yen, D., Walmsley, R.P., Cooke, T.D.V.  (1991).   Results of rotator cuff repair collating
clinical, radiologic, and isokinetic muscle strength analysis. J Bone Joint Surg, 73 B,
Supplementary 2, 106.

2. Schuringa, P., Yen, D. (1997). Prophylactic anti-coagulation control at home after knee and hip arthroplasty. J Bone Joint Surg, 79B, Supplementary 1, 76.

3. Hakim, O., Yen, D. (1997). Alignment of burst fractures treated with the AO spinal
internal fixator at 3 month follow-up. J Bone Joint Surg, 79B, Supplement 1, 70.

4. Mayman, D., Yen, D. (1998). Outcome of referrals to surgical clinic for back problems.
J Bone Joint Surg, 80B, Supplement 1, 10.

5. Darsaut, T., Yen, D. (2002). Outcome of lumbar laminectomy with discectomy for disc
herniation and associated central spinal stenosis. Can J Surg, Vol. 45, Suppl., 10.

6.  Yen, D. (2003). Preoperative predictive factors in lumbar discectomy. Can J Surg, Vol. 46, Suppl., 7

7.  Athiviraham, A., Yen, D., Scott, C.,Soboleski, D. (2007). Clinical Correlation of 
Radiological Spinal Stenosis after Standardization for Vertebral Body Size. Can J
Surg, Vol. 50, Suppl., 15.

8.  Vasarhelyi, T, Yen, D. (2008). The clinical outcome of lumbar disc herniation treated
with and without discectomy. Can J Surg, Vol. 51, Suppl., 22.


Papers in Conference Proceedings:
International

1.  Yen, D., Walmsley, R., Cooke, T.D.V. (1990).  Assessment of the results of rotator cuff repair using clinical, radiological and isokinetic testing.  American Academy of
Orthopaedic Surgeons Shoulder and Elbow Society Meeting, Chicago, Illinois.

2.  Yen, D., Sorbie, C., Whelan, E., Davidson, L. (1992).  Efficacy of a modified adjusted
dose heparin protocol for DVT prophylaxis in lower limb surgery.  Combined Meeting
of the Orthopaedic Associations of the English-Speaking World, Toronto, Ont.

3.  Lysack, J., Yen, D., Dumas, G. (1999). Analysis of an instrumentation system to control the biomechanical environment for spinal fusion. Medical Student Research Forum, San Antonio, Texas.

4. Athiviraham A.; Yen D.; Scott, C.F.; Soboleski D.(2007). Clinical Correlation of   
Radiologic Spinal Stenosis after Standardization for Vertebral Body Size. American
Roentgen Ray Society, Orlando, Florida.

National
1. Yen, D., Dumas, G.A., Bryant, J.T., Toma, E. (1994).  Design of an instrumentation
system to control the biomechanical environment in spinal fusion, Canadian
Orthopaedic Association Meeting, Winnipeg, Manitoba.

2. Howard, A., Yen, D. (1995). Anterior spinal fixation with pelvic plate and methyl
methacrylate.  Canadian Orthopaedic Association Meeting, Halifax, Nova Scotia.

3. Schuringa, P., Yen, D. (1995). Lumbosacral spinal fusion with pedicle screw
instrumentation.  Canadian Orthopaedic Resident Association Meeting, Halifax, Nova
Scotia.

4. Schuringa, P., Yen, D. (1996).  Prophylactic anti-coagulation control at home after
knee and hip arthroplasty.  Canadian Orthopaedic Association Meeting, Quebec City, Quebec.   

5. Hakim, O., Yen, D. (1996).  Alignment of burst fractures treated with the AO spinal
internal fixator at 3 month follow-up.  Canadian Orthopaedic Association Meeting,  Quebec City, Quebec.

6. Charles, M., Yen, D. (1996).  Properties of a plaster-fiberglass hybrid cast.  Canadian
Orthopaedic Research Society Meeting, Quebec City, Quebec.

7. Smyth, W., Yen, D. (1996). The pig as an animal model for spinal instrumentation.
Canadian Orthopaedic Research Society Meeting, Quebec City, Quebec.

8. Yach, J., Yen, D. (1997).  Inpact of same day admission surgery on resident education, patient satisfaction, and hospital utilization. Canadian Orthopaedic Association Meeting, Hamilton, Ont.

9. Mayman, D., Yen, D. (1997).  Outcome of referrals to surgical clinic for back problems. Canadian Orthopaedic Association Meeting, Hamilton, Ont.

10. Lysack, J., Yen, D., Dumas, G. (1999). In vitro biomechanical analysis of an
experimental instrumentation system. Canadian Orthopaedic Research Society Meeting, St. Johns, Nfld.

11. Yen, D., Chin, P., Fern, K., Lavallee,C, Smith, R. (2000). The predictive value of    
quantitative radiologic neural impingement in a prospective study of outcomes    
following lumbar disc and spinal stenosis surgery. Canadian Congress for Spine
Surgery  Meeting, Banff, Alberta.

12. Yach, J., Kuriachan, V., Yen, D., Howard, A. (2000). Survivorship of the Wellesley
Wedge construct in metastatic spine disease. Canadian Congress of Spine Surgery
Meeting, Banff, Alberta.

13. Yen, D., Hakim, O. (2001). The effect of postoperative bedrest on the long term
alignment of burst fractures treated with the AO spinal fixator.Canadian Spine Society
Meeting, Mont Tremblant, Quebec.

14. Chin, P., Lavallee, C., Smith, R., Yen, D. (2001). A prospective study relating functional outcome to radiologic impingement in lumbar spinal stenosis: A 1 year follow report. Canadian Orthopaedic Association Meeting. London, Ontario.

15. Darsaut, T., Yen, D. (2002). Outcome of Lumbar Laminectomy with Discectomy for
Disc Herniation and Associated Central Spinal Stenosis. Canadian Spine Society
Meeting, Vernon, British Columbia.

16. Watson, D, Yen, D. (2003). Preoperative predictive factors in lumbar discectomy.
Canadian Spine Society Meeting, Cornerbrook, Newfoundland.
    
17. Darsaut, T., Yen, D. (2004). Outcome of laminectomy with discectomy compared to
hemilaminectomy with discectomy. Canadian Congress of Neurologic Sciences        Meeting, Calgary, Alberta.

18. Athiviraham, A, Yen, D. (2007). Clinical correlation of radiologic spinal stenosis
after standardization for vertebral body size. Canadian Spine Society Meeting, Mont 
Tremblant, Quebec.

19. Athiviraham, A., Yen, D. (2007). Clinical correlation of radiologic spinal stenosis
after standardization for vertebral body size. Canadian Orthopaedic Association
Meeting, Halifax, Nova Scotia.

20. Athiviraham, A., Yen, D. (2007). Is spinal stenosis better treated surgically or non-
]surgically? Canadian Orthopaedic Residents Association Meeting, Halifax, Nova Scotia.

21. Vasarhelyi, T., Yen, D. (2008). Clinical correlation of radiologic lumbar disc herniation after standardization for vertebral body size. Canadian Spine Society Meeting, Sun
Peaks, British Columbia.

22.  Vasarhelyi, T., Yen, D. (2008). Preoperative predictive factorsafter 2 year follow-up in lumbar discectomy. Canadian Orthopaedic Association Meeting, Quebec City, Quebec.

23. Wali, Z., Yen, D. (2009). Mini diaphragm incision to approach thoracolumbar spine
anteriorly. Canadian Spine Society Meeting, Gatineau, Quebec.

Regional
1.  Yen, D., Yendt, E., Hedden, D. (1989).  Multiple  compression vertebral fractures as
a complication of cortical steroid use in cystic fibrosis.  Ersil Resident Research Day,
Kingston, Ont.

2.  Schuringa, P., Yen, D. (1994). Effect of pedicle screw instrumentation on spinal fusion rates. Ersil Resident Research Day, Kingston, Ont.

3.  Howard, A., Yen, D. (1995). Anterior spinal fixation with pelvic plate and
methylmethacrylate. Ersil Resident Research Day, Kingston, Ont.

4.  Kerr, D., Yen, D. (1995).  Pre-operative predictive factors in lumbar discectomy. Ersil
Resident Research Day, Kingston, Ont.

5.  Schuringa, P., Yen, D. (1996). Monitoring postoperative oral anticoagulation in the orthopaedic population. Ersil Resident Research Day, Kingston, Ont.

6.   Hakim, O., Yen, D. (1996). Alignment of burst fractures treated with the AO
fixator/Interne at 3 month follow-up. Ersil Resident Research Day, Kingston, Ont.

7.   Charles, M., Yen, D. (1996). Properties of a plaster-fiberglass hybrid cast. Ersil
Resident Research Day, Kingston, Ont.

8.   Smyth, W., Yen, D. (1996). The pig as an animal model for spinal instrumentation.
Ersil Resident Research Day, Kingston, Ont.

9.   Hakim, O., Yen, D. (1997).  Alignment of Chance fractures treated with the AO spinal internal fixator at greater than 3 month follow up. Ersil Resident Research Day,
Kingston, Ont.

10. Bardana, D., Yen, D., Saunders, G. (1997).  Flexion/extension lateral x-ray to evaluate spinal motion using a standardized frame. Ersil Resident Research Day, Kingston, Ont.

11. Lysack, J., Yen, D., Dumas, G. (1999). Stepwise modulation of spinal construct
flexibility: An experimental instrumentation system for the determination of optimal
spinal fusion biomechanics. Ersil Resident Reseach Day, Kingston, Ont.

12. Jasey, G., Hakim, O., Yen, D. (2000). Pedicle screw  instrumentation: role for
postoperative immobilization. Ersil Resident Research Day, Kingston, Ont.

13. Chin, P., Fern, K., Yen, D. (2001). Prospective outcome study relating functional
outcome to radiologic impingement in lumbar spinal stenosis: A one-year follow-up
report. Ersil Resident Research Day, Kingston, Ont.

14. Fern, K., Yen, D. (2001). A prospective study of preoperative predictive factors,
digitalized imaging, and long-term outcome following lumbar discectomy. Ersil
Resident Research Day, Kingston, Ont.

15. Watson, D., Yen, D. (2002). Outcome measures: Single vs multi-level
laminectomy in the lumbar spine.  Ersil  Resident Research Day, Kingston, Ont.

16. Watson, D., Yen, D. (2003). Preop discectomy predictive factors. Ersil  Resident
Research Day, Kingston, Ont.

17. Watson, D., Yen, D., Pichora, D. (2004). Health promotion program: A novel approach to resident well-being in surgical training. Ersil  Resident Research Day, Kingston, Ont.

18. Athiviraham, A., Yen, D. (2006). Functional outcomes of spinal stenosis. Ersil  Resident Research Day, Kingston, Ont.

19. Vaserhelyi, T, Yen, D. (2007). Preoperative Radiologic Disc Herniation Standardized for Thecal Sac Size as a Predictive Factor for Outcome in Lumbar Discectomy Ersil  Resident Research Day, Kingston, Ont.

20. Lewis, T, Yen, D. (2008).  Percutaneous 3 Kirschner wire fixation for treatment of Pilon fractures of the distal radius. A case series. Ersil  Resident Research Day, Kingston, Ont.
 


Invited Lectures:
1.   Treatment of Spinal injuries. (1993) KGH Nurses Trauma Workshop, Kingston, ON

2.   Diagnosis and treatment of acute back pain. (1995) Queens University Continuing
Medical Education, Kingston, Ontario

3.   Decompression and stabilization of the metastatic spinal lesions. (1996) Beijing
Orthopaedic Society,  Beijing, Peoples Republic of China.

4.   Orthopaedic surgery for common foot problems. (1996) St. Mary?s Of the Lake Foot
Care Symposium, Kingston, Ontario

5.   Outcomes of consultation and surgery for spinal disorders. (1996) Queen?s
Orthopaedic Alumni Reunion, Kingston, Ontario

6.   Effective surgical treatments in spinal disease. (1997) Queens University Continuing
Medical Education, Kingston, Ontario

7.   Research into the optimal biomechanical environment for spinal fusion. (1999) Little
Club, Kingston, Ontario

8.   Teaching residents how to plan, implement and evaluate a practice based curriculum for lifelong learning. (2001) The RCPSC Annual Conference, Ottawa, Ontario

9.   Current knowledge concerning spinal stenosis surgery. (2002) University of
Ottawa Orthopaedic Residents? Research Day, Ottawa, Ontario

10. Can professionalism be taught in medical school?  (2005) Travill Debate, Queen?s
University

11. Moderator at the Annual Canadian Spine Society meeting. (2008). Sun Peaks, British
Columbia

12. Faculty at the Canadian Orthopaedic Resident Forum. (2008). University of Calgary

13. Faculty at the Canadian Orthopaedic Resident Forum. (2009). University of Calgary

Funded Research:
 Yen, D., Dumas, G. (1992) Characteristics of spinal instrumentation to optimize the rate of fusion. Canadian Orthopaedic Foundation (Hip Hip Hooray). $8,000

 Yen, D. (1993) Arthroplasty thromboprophylaxis cohort study. Rhone Poulenc Rorer. $9,630

 Yen, D., Saunders, G. (1993) Development of a standardized lumbosacral spine x-ray system. Kingston General Hospital. $12,100

 Yen, D., Dumas, G. (1994) Mechanical testing of a pedicle screw-slotted plate system to control the biomechanical environment in spinal fusion. Smith & Nephew Richards. $12,132

 Yen, D., Dumas, G. (1995) Development of a spinal instrumentation system to control the biomechanical environment for lumbar fusion. PSI. $33,756

 Yach, J., Yen, D. (1996) Optimal duration of treatment of deep vein thrombosis. Canadian Orthopaedic Foundation (Hip Hip Hooray). $1,500

 Yach, J., Yen, D. (1996) Same day admission surgery impact on education, patients, and hospital resources. Kingston General Hospital. $1,400

 Mayman, D., Yen, D. (1996) Study of referrals to a surgical clinic for back problems. Kingston General Hospital. $1,000

 Bardana, D., Yen, D. (1997) Flexion-extension spine x-rays using a standardized chair frame. Canadian Orthopaedic Foundation (Hip Hip Hooray). $100

 Chin, P., Lavallee, C., Yen, D. (1997) Clinical and radiologic prognostic indicators in spinal stenosis surgery. Canadian Orthopaedic Foundation (Hip Hip Hooray). $700

 Lysack, J., Yen, D. (1998) Fabrication of a pure moment testing apparatus. Canadian Orthopaedic Foundation (Hip Hip Hooray). $1,200

 Amjadi, K, Yen, D. (1998) The pig as an animal model for spinal fusion. Canadian Orthopaedic Foundation (Hip Hip Hooray). $600

 Yen, D., Dumas, G. (1998) Development of a spinal instrumentation system to control the biomechanical environment for lumbar fusion in the pig. Queens Faculty of Health Sciences. $7,500

 Mark, D., Turner, K., Yen, D. Single dose intrathecal morphine versus patient controlled analgesia for postoperative pain control following lumbar surgery. Kingston General Hospital Foundation. $10,000, Canadian Orthopaedic Foundation (Hip Hip Hooray). $2,000

 Jasey, G., Yen, D. Prospective study of the radiologic signs of impending vertebral collapse in spinal metastasis. Canadian Orthopaedic Foundation (Hip Hip Hooray). $2,000

 Athwal, G, Yen, D. (2003) Comparison of the overall Royal College of Physicians and Surgeons of Canada certification examination mark to the scores of its oral and written componenets as well as to the orthopaedic In-Training Examination. Wigle Award-Queens Faculty of Health Sciences. $1500


Contributions:
National Responsibilities
 MRC grant reviewer  1994
 MRC grant reviewer  1995
 PSI grant reviewer  1995
 PSI grant reviewer  1996
 Memorial University of Newfoundland grant reviewer  1996
 RCPSC Orthopaedic Specialty Committee -1998 to 2004
 MRC grant reviewer  1999
 RCPSC Orthopaedic Surgery Examination Board - 1999 to 2004
 MRC grant reviewer  2000
 RCPSC Orthopaedic Surgery Test Committee-2000 to 2004
 CIHR grant reviewer  2000
 PSI grant reviewer  2002
 Nucleus member, RCPSC Orthopaedic Surgery Examination Working Group-2002-06
 Calgary Health Region grant reviewer  2003
 Medical Science Monitor manuscript reviewer  2003
 PSI grant reviewer  2005
 Winnipeg Health Sciences Centre Foundation grant reviewer  2006

University Responsibilities:
 Secretary division of orthopaedics - 1993 to 1995
 Chair department of surgery levy arbitration committee  1996
 Department of surgery research development committee -1996 to 2000
 Core surgery committee - 1998 to 2004
 Chair orthopaedic postgraduate education committee - 1998 to 2004
 Queen's postgraduate education committee  - 1998 to 2004
 Department of Surgery Administrative Assistant selection committee  2001
 Chair emergency medicine training program internal review  2001
 Search committee for Chair of General Surgery Division  2004
 Orthopaedic Division Website management working group - 2005

Hospital Responsibilities:
MRI prioritization task force - 1993
KGH continuous quality improvement committee - 1993 to 1994
KGH antimicrobial use subcommittee - 1993 to 1994
KGH operating room committee - 1993 to 1995
Bone bank utilization committee  1994
KGH glove utilization committee - 1995 to 1996
Consent legislation implementation planning group - 1995 to 1996
Chair orthopaedic joint practice committee  - 1995-1999
Orthopaedic Surgery service chief - 1995 to 1999
KGH ambulatory care committee  1996
Same day admission surgery working group 1996
KGH Emergency department utilization task force  1997
Surgical Council - 1998 to 2004
Acute pain management committee  - 1999
Quality & Utilization Committee - 2005
KGH & HDH joint medical adviory committee - 2006