THERMAL EFFECT ON KNOTS

被引:1
作者
SEMJONOW, A [1 ]
BRANDT, M [1 ]
REUL, H [1 ]
RATHERT, P [1 ]
机构
[1] HELMHOLTZ INST BIOMED ENGN,AACHEN,GERMANY
来源
BIOMEDIZINISCHE TECHNIK | 1991年 / 36卷 / 7-8期
关键词
KNOTS; KNOT HOLDING CAPACITY; SUTURE MATERIAL; THERMAL FIXING; POLYPROPYLENE;
D O I
10.1515/bmte.1991.36.7-8.177
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
Knots represent the weakest point in suture material. As a result of bending and tension, forces develop within the knot that exceed the strength of the suture material and lead to rupture. Furthermore, because of their relatively large surface area, the most pronounced reactions occur in the vicinity of knots. The results of in vitro experiments conducted with the aim of improving the strength of knots are reported. The knot holding capacity of polypropylene filaments (EP 5/USP 2) was determined at room temperature (22-degrees-C) after exposure to temperatures of 63, 98 and 150-degrees-C. Knots that were exposed to a temperature of 98-degrees-C for 10 seconds had a 50% higher holding capacity than untreated knots. With a higher knot holding capacity, secure fixation can be achieved with fewer knots. Since fewer knots have a smaller surface area, a reduction in tissue reaction may be expected.
引用
收藏
页码:177 / 181
页数:5
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