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Jan. 25, 2000 (New York) -- Previous studies had shown that patients who have surgery of the shoulder and spine due to an injury on the job tend to fare worse than other people having these surgeries. Attempting to shed light on whether this is also true for knee surgery, a new study suggests that patients who undergo reconstruction of their anterior cruciate ligament (ACL) did just as well as patients undergoing the procedure for sports injuries.

Yet while the study authors contend that their findings lend support to recommending the procedure for many workers' compensation cases, an expert questions whether the study supports that recommendation.

In a study published in the current issue of Arthroscopy: The Journal of Arthroscopic and Related Surgery, researchers analyze outcomes of ACL reconstruction procedures performed by Bernard J. Bach Jr., MD, from the division of orthopaedic surgery and sports medicine at Rush-Presbyterian-St. Luke's Medical Center in Chicago. The ACL is the ligament that holds the knee together and helps stabilize it.

Studying 22 patients on workers' compensation, the investigators show that a large proportion of these individuals had good outcomes. They compared the results with those obtained from patients seen over time, finding just about the same outcomes in terms of symptom relief, knee stability, and quality of life. They argue that the data support recommending the surgery for patients on workers' compensation who have this sort of knee injury.

However, another orthopedist disagrees. Robert B. Keller, MD, an orthopaedic surgeon and executive director of the Maine Medical Assessment Foundation, tells WebMD that it is quite a leap to conclude that this study should be taken as a recommendation for surgery. "When patients are diagnosed with an anterior cruciate ligament injury, they need to know that there are options," he says. "Not every ACL tear requires surgery."

Keller says that there are age thresholds associated with the procedure. In many cases, he says, "patients over age 40 or 50 are not considered good candidates -- often because they don't work their knees that hard." Even so, he is quick to point out that ACL reconstruction is a good operation and that the surgery has improved in the past several years to permit a much faster recovery.

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