%0 Journal Article
%T The effect of traction force on eyelid blood perfusion during closure of defects.
%A Nääv Ottosson J
%A Berggren JV
%A Tenland K
%A Bohman E
%A Sheikh R
%A Malmsjö M
%A Merdasa A
%J Orbit
%V 0
%N 0
%D 2024 Apr 30
%M 38687914
暂无%R 10.1080/01676830.2024.2335999
%X <B>UNASSIGNED: </B>In oculoplastic surgery the eyelid tissue is frequently stretched in order to repair defects after tumor surgery. However, there is a paucity of research regarding how stretching affects eyelids. The purpose of this study was to gain insight into how traction force affects eyelid stretch as well as tissue perfusion, using a laser-based in vivo monitoring technique.<BR><B>UNASSIGNED: </B>Lower-lid pentagonal resections were performed in eight patients and a total of nine eyelids. The medial section of the eyelid was then stretched using a dynamometer up to a force of 2.3 Newtons (N), and eyelid stretching and blood perfusion were continuously measured using laser speckle contrast imaging.<BR><B>UNASSIGNED: </B>Tissue perfusion decreased exponentially when eyelid tissue was stretched, with an initial sharp decline followed by a more gradual reduction. Perfusion approached zero at a force of approximately 2.0 N. The length of the eyelid increased with increasing force up to 1.5 N, after which there was only a very slight increase in length.<BR><B>UNASSIGNED: </B>Eyelid tissue seems to respond to traction in a non-linear fashion, where the initial force results in the greatest eyelid stretching and reduction in blood perfusion. The results provide information on the effects of a large force for direct closure of large eyelid defects. Considering how quickly perfusion approaches zero, the high success rate of eyelid reconstruction surgery is likely a testament to the extensive vascularization of the periocular region.