Gliding resistance versus work of flexion - Two methods to assess flexor tendon repair

Tatsuro Tanaka, Peter C. Amadio, Chunfeng Zhao, Mark E. Zobitz, Kai Nan An

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Abstract

Two methods for measuring the ability of the flexor tendon to glide following repair are commonly cited in the literature; gliding resistance (GR) at the tendon-pulley interface and work of flexion. The GR measures the friction force at the tendon-pulley interface, while the work of flexion characterizes Whole finger function during flexion. Since a portion of the total work of flexion (TWOF), termed the internal work of flexion (IWOF), is expended due to the tendon-pulley interaction, a relationship between the work of flexion and GR should be present. The purpose of this study was to quantify this correlation. Forty-eight flexor digitorum profundus tendons in 48 mongrel dogs were transected and repaired with a modified Kessler technique and an epitenon running suture. Post-operatively, the operated paw was immobilized in a cast. Dogs were sacrificed at 1, 3, 5 or 7 days after surgery. In each repaired digit work of flexion and GR were measured. While the GR was not significantly different over the time points, the TWOF decreased at 5 days after surgery and then increased at 7 days (p < 0.05). There was little correlation between TWOF and GR (r = 0.25, p = 0.07). However, there was a strong correlation between IWOF and GR (r = 0.76, p < 0.05) suggesting that measurement of GR could be used as a predictor of IWOF within the short term after tendon repair.

Original languageEnglish (US)
Pages (from-to)813-818
Number of pages6
JournalJournal of Orthopaedic Research
Volume21
Issue number5
DOIs
StatePublished - Jan 1 2003

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ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

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