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  • Title: Tubulation repair of peripheral nerves in the rat using an inside-out intestine sleeve.
    Author: Wang KK, Cetrulo CL, Seckel BR.
    Journal: J Reconstr Microsurg; 1999 Oct; 15(7):547-54. PubMed ID: 10566585.
    Abstract:
    This study compared the regeneration of peripheral nerves in the Sprague-Dawley rat through a nerve guide prepared from rat small intestine to nerve regeneration using a standard autogenous nerve-graft repair strategy. In one experimental group (n = 15), inside-out rat intestine sleeves were used as nerve guides to bridge a 10-mm defect created in the right sciatic nerve. These nerve guides were prepared by harvesting 14-mm segments of small intestine from Sprague-Dawley rats not otherwise used in the study. The segments were turned inside-out to expose the serosa as the lumen of the guide, and transected nerve stumps were secured 2 mm into the guide on each end with an epineural-to-guide stitch. The control group (n = 15) had an identical gap repaired with a standard autologous nerve graft. Five animals from each group were sacrificed at 4, 8, and 12 weeks. The extent of axonal regeneration was assessed by axon-counting, retrograde tracer analysis, electromyography, and qualitative histologic assessment. The inside-out intestine sleeve group exhibited faster conduction velocities and greater axon counts when compared to the autologous nerve-graft controls. These novel nerve guides proved simple to manufacture and were completely absorbed by 12 weeks.
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