Fascicular Tubulization: A Comparison of Experimental Nerve Repair Techniques in the Cat

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Abstract
Peripheral nerve repair remains one of the most difficult problems in hand surgery; the results of conventional epineurial and fascicular suture repair are a major limitation to the rehabilitation of the patient. The aim of this study was to evaluate a tubulization technique of nerve repair by wrapping a membrane of hypoantigenic collagen around the nerve at the fascicular level. Cat ulnar and median nerves were used as a multifascicular nerve model. Thirty-eight animals were studied. Ten animals were included in long-term studies comparing fascicular tubulization to either epineurial suture or fascicular suture nerve repair. Histologically, the tube repairs demonstrated improved organization at the repair site compared with either suture technique. Tube repair is not significantly different statistically by quantitative histological and physiological evaluation methods from epineurial suture or fascicular suture repairs. Further studies in more clinically applicable animal models are required before this technique can be considered as an alternative to present clinical nerve suture techniques.

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