Learning Curve in Tracheal Allotransplantation

Tracheal allotransplantation after withdrawal of immunosuppressive therapy.

Reconstruction of long-segment tracheal defects requires a vascularized allograft. We report successful tracheal allotransplantation after indirect revascularization of the graft in a heterotopic position. Immunosuppressive therapy was administered before the operation, and the tracheal allograft was wrapped in the recipient's forearm fascia. Once revascularization was achieved, the mucosal lin...

Two-piece cryopreserved tracheal allotransplantation: an experimental study.

OBJECTIVES For successful reconstruction with tracheal allotransplants following long tracheal resections, problems related to the preservation and vascularisation of the tracheal graft have to be solved. In this study, instead of using a long-segment single-piece graft, we used a graft that has been split into two. The aim was to use this graft after cryopreservation in order to ease neo-vascu...

Abstract 38: tracheal allotransplantation and prefabrication for long tracheal stenosis with withdrawal of immunosuppression: from bed to bench.

Multivisceral allotransplantation in pigs.

MUL TIVISCERAL transplantation was first applied clinically for the treatment of short bowel syndrome complicated by liver failure from long-term hyperalimentation. The first experimental work in dogs was reported by Starzl et al in the early 1960s" Recently, several experiments using large animals showed that multivisceral transplantation is a technically complicated procedure with high mortal...

Learning Curve and Industry Structure: Evidences from Iranian Manufacturing Industries

he empirical studies have shown that cost advantages can occur due to economies of scale and economies of learning. However, a few studies have attempted to distinguish between these two effects on reducing costs. This paper is the first attempt on recognizing the impact of learning on reducing the cost with distinguishing the effect of economies of scale in Iran. Therefore, this study aims to ...