Cartmill J A, Shakeshaft A J, Walsh W R, Martin C J
University of Sydney Department of Surgery, Nepean Hospital, Penrith, NSW, Australia.
Aust N Z J Surg. 1999 Feb;69(2):127-30. doi: 10.1046/j.1440-1622.1999.01496.x.
Despite its importance the interface between tissue and instrument is poorly understood.
A thin film pressure transducer was deployed between the jaws of eight different laparoscopic instruments and a simulated tissue to study the forces generated at the tip of laparoscopic graspers and the effect of a change in angle of tissue tension at the interface between tissue and laparoscopic grasper.
Pressure was concentrated at the tip of the instrument. Localized pressures increased on average from 210 kPa to 650 kPa as the angle of grasp was increased from 0 to 135 degrees. There was a wide variation between instruments with some exhibiting increases in tip pressure of a factor of eight as the angle was increased.
High pressures are generated at the tip of laparoscopic graspers. Pressures increase as the angle of incidence of the grasper in relation to the tissue increases. The changes in pressure with change in angle are independent of load and handle pressure.
尽管组织与器械之间的界面很重要，但人们对其了解甚少。
将一个薄膜压力传感器置于八种不同腹腔镜器械的钳口与模拟组织之间，以研究腹腔镜抓钳尖端产生的力，以及组织与腹腔镜抓钳界面处组织张力角度变化的影响。
压力集中在器械尖端。随着抓持角度从0度增加到135度，局部压力平均从210千帕增加到650千帕。不同器械之间存在很大差异，随着角度增加，一些器械的尖端压力增加了八倍。
腹腔镜抓钳尖端会产生高压。抓钳相对于组织的入射角增加时，压力会升高。压力随角度变化而变化，与负载和手柄压力无关。
