自家静脈In-situ bypass用セラミック刃付き静脈弁切開器の考案

概要

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The in situ vein bypass procedure allows vein grafts to be constructed without the necessity of surgical exposure of the entire vein and to be used in situ as vascular conduit of arterial blood flow. In principle, in the vein for use in situ entails removal of the valvular obstructions to distal arterial flow, interruption of the venous branches that become arteriovenous fistulas when the vein is arterialized, and the mobilization of its ends for construction of the proximal and distal arterial anastomoses. The advantage of the in situ method is that the matching of sizes of the bypass to the arteries it connects and its gradual distal taper results in optimum flow characteristics. Although intraluminal incision of the valve using various cutters has been reported, they were still found less satisfactory. Accordingly original-design vein valve cutters with ceramic edge were developed and have been used clinically.Results in clinical use of this instrument prove this procedure of valve cutting to be performed smoothly and satisfactorily. Owing to the valve cutter we developed, in situ vein bypass can be completed with minimum invasion as a few local skin incisions.
日本医療機器学会の論文
1988-08-01