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Dr Duong Nguyen MPC

MD, FRCSC, MSc(ClinEpi), DipABOS, DipSportsMed(ABOS), FAAOS, CIME, DESS(c), DipSportMed(CASEM), Adjunct Clinical Professor - McMaster University

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Dr. Duong Nguyen in the news 

Press release Dr. Duong Nguyen - The American Orthopaedic Society for Sports Medicine (AOSSM): 'Females under 25 with a graft size less than 8 mm at greater risk for ACL re-tear


This ACL outcome paper was presented at the Annual Meeting of the AOSSM in Colorado Springs on July 7th, 2016 and was selected as a highlight paper for press release.

Please click on links below for the press release articles:

AOSSM press release Dr Duong Nguyen ACL.pdf{8da3298e-4935-43a4-9211-4f98ac7bd60a}/study-finds-age-graft-size-are-predictors-for-re-tear-following-acl-reconstruction

Study finds age, graft size are predictors for re-tear following ACL reconstruction

COLORADO SPRINGS, Colo. — Results presented at the American Orthopaedic Society for Sports Medicine Annual Meeting showed athletes who underwent ACL reconstruction and were younger than 25 years old and had a graft size of less than 8 mm were at higher risk for re-tear. Duong Nguyen, MD, FRCSC, MSc, FAAOS, CIME, DipSportsMed (ABOS/CASEM), and colleagues evaluated 503 patients with a mean

Click on link below for article

AAOS now Risk Factors for ACL Re-tears in Athletes.pdf

The Injury Women Are More Likely to Have

Before stepping onto that soccer field or lacrosse field — ladies, take extra precautions. You’ve trained hard, learned all of the plays, and committed to your sport, but it only takes one wrong turn to undo that hard work. Ongoing research continues to show that women are up to six times more likely to suffer an anterior cruciate ligament (ACL) injury than men. Women — younger women in particular — are also more likely to suffer a subsequent re-tear. Most ACL injuries come from non-contact sports. There are certain genetic predispositions that leave females more vulnerable to knee injuries, specifically of the ACL. And this ligament’s got a big job — its main function is to provide stability to the knee, as well as rotational stability. Most ACL injuries come from non-contact sports, according to Dr. Duong Nguyen, an orthopedic surgeon from Toronto, Canada, who specializes in elbow, shoulder, and knee reconstructive surgery. He said these kinds of injuries often result from sharp movements    

Pub date:



Rob Goodier


Young age and small grafts may increase the odds of ACL reconstruction re-tear

Topic Codes:


Body Text:

By Rob Goodier

NEW YORK (Reuters Health) -Young patients and small grafts
may have higher odds of re-tear after an anterior cruciate
ligament reconstruction, new research suggests.

The odds of a re-tear may be seven times higher in patients
younger than 25 years old and three times higher if the graft is
smaller than 8 mm, according to data presented July 7 at the
American Orthopaedic Society for Sports Medicine's annual
meeting in Colorado Springs, Colorado.

Women may also be at risk with 1.8-fold higher odds of
re-tear, but the association was not statistically significant.

Physicians should counsel those patients and consider
modifying their surgical or rehabilitation methods, Dr. Duong
Nguyen, an orthopedic surgeon based in Toronto, Canada, who led
the study, told Reuters Health by email.

"ACL re-tear is multifactorial and physicians should also
consider other potential causes such as the specific sport
played, the athlete's level of competition and position on the
team, the extent of contact in the sports activity, and the
patient's tendency for risk taking behavior, which are harder to
quantify and control in a study," Dr. Nguyen says.

The study followed 503 athletes for two years after they
underwent a primary autograft hamstring ACL reconstruction. The
surgery was by a single surgeon using the same technique and
rehabilitation regimen.

Multivariate logistic regression found that patients
younger than 25 had an odds ratio of re-tear of 7.01 (p=0.001).
Graft size of less than 8 mm had an odds ratio of 2.95
(p=0.008). Univariate analysis suggested that women may have
higher odds of suffering a re-tear, but it was not statistically
significant (OR: 1.8).

All patients should be warned of ACL reconstruction risks,
and, if asked, surgeons could add information about the two or
three risk factors examined in this study, says Dr. Barry Boden,
a professor of orthopedic surgery at Uniformed Services
University of the Health Sciences in Bethesda, Maryland, who was
not involved in the research.

"I do agree with the conclusions that surgeons may wish to
modify their surgical technique and rehabilitation when these
conditions exist. Dr. Boden says.

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AOSSM 2016.