変形断裂回避のための脆弱血管結さつ法

概要

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Accidental disruption of the vascular wall due to ligation causes serious bleeding. In the present study, mechanisms of this disruption are analyzed using theoretical formulae for calculation of constricting stresses. To confirm the results obtained using the formulae, an imitation vessel made of agar-agar is ligated and the configurational changes produced by the ligation are photographed. The validity of the use of the imitation vessel is evaluated by measuring the breakage stresses of swine tissues. In a usual ligature, the cross sectioned configuration changes to heart-like shape, i.e., a node side half of the imitation vessel wall being pressed down, and the portion of a valley bent inside the lumen is disrupted. A new ligation technique for prevention of the disruption is proposed, namely, ligation of a vessel with interposition a round pad or a half-circle pad between the node and the vessel.
一般社団法人日本機械学会の論文
1997-05-25