Brouwers J E, Oosting H, de Haas D, Klopper P J
Department of Surgical Research, Academic Hospital, University of Amsterdam, The Netherlands.
Surg Gynecol Obstet. 1991 Dec;173(6):443-8.
Lately, many suture materials have been introduced. Their physical characteristics in combination with knots are not well known. In this study, seven knots (square--1=1, 2=1, 2=1-S and 1=1=1--and sliding--SxSxS, S=S parallel S and 1-S parallel S parallel S) made in seven suture materials (plain catgut, Dexon [polyglycolic acid)] Maxon [polyglyconate], PDS [polydiaxone], Vicryl [polyglactine 910], Mersilene [polyester fiber], Prolene [polypropylene] were tested dynamically to ascertain tensile strength. The knots were classified as "predominantly breaking" (PB) and "predominantly slipping" (PS). A new method for statistical analysis, the Kaplan-Meier survival estimate, was introduced. Square knots provided good mechanical results but did not prevent slippage completely. Most sliding knots were weak. The 1=1=1 knot was superior. PS knots (1=1, 2=1, SxSxS and S=S parallel S) were unsuitable for surgical practice in monofilament or coated multifilament suture materials. The classification PB and PS knots gave an easy impression of the knot holding capacities. Application of the Kaplan-Meier estimate resulted in a more realistic analysis than classical methods.
近来，许多缝合材料已被引入。它们与打结相关的物理特性尚不为人所知。在本研究中，对七种缝合材料（普通肠线、德克松[聚乙醇酸]、马克松[聚甘醇酸酯]、PDS[聚二氧六环酮]、薇乔[聚乙交酯910]、梅丝线[聚酯纤维]、普理灵[聚丙烯]）所打的七种结（方结——1=1、2=1、2=1-S和1=1=1——以及滑结——SxSxS、S=S平行S和1-S平行S平行S）进行了动态测试，以确定其抗张强度。这些结被分类为“主要断裂型”（PB）和“主要滑动型”（PS）。引入了一种新的统计分析方法，即Kaplan-Meier生存估计法。方结提供了良好的力学结果，但不能完全防止滑动。大多数滑结强度较弱。1=1=1结表现更优。PS结（1=1、2=1、SxSxS和S=S平行S）不适用于单丝或涂层复丝缝合材料的外科手术。PB和PS结的分类能让人轻松了解结的持力情况。与传统方法相比，应用Kaplan-Meier估计法能得出更实际的分析结果。
