Using an animal model, the effect of a single intraoperative application of 5-fluorouracil on digital flexor tendon adhesions was assessed. After a standard partial division of the tendon and immobilization with a stitch, the synovial sheath in 30 rabbit tendons was treated with 5-fluorouracil solution (50 mg/ml)-soaked sponge pledgets for 5 minutes. Buffered saline was substituted for 5-fluorouracil in 30 control tendons. The tendons were harvested 1 week postoperatively, and histologic sections were assessed with a light microscope. There was a significant reduction in synovial sheath thickening (p < 0.001), cell counts (p < 0.001) and proportional length of adhesions (p < 0.001) in the treated tendons. The reduction in synovial reaction and adhesion formation using this "one touch" technique presents a novel strategy for the management of the clinical problem of postoperative adhesions complicating tendon injury and repair.
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