Experimental Models in Primates for Reconstructive Surgery Utilizing Tissue Transplants

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Abstract
Two experimental models for tissue transplantation between unrelated individuals of a primate species have been designed to study survival and reinnervation. The first is a neurovascular free flap consisting of the entire soft tissue coverage of the index finger. The second is an entire hand transplant through the distal forearm. Ongoing studies show that cyclosporin A at high doses, in combination with a tapering regimen of steroids to a low maintenance level, permits prolonged survival of both transplant models. Careful biochemical, hematological, and cyclosporin A serum trough level monitoring permits use of this drug at very high dosages in primates. Continuing experiments should yield detailed neurophysiological data on the reinnervation of these transplants over the next 6 to 18 months.

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