The effect of traction force on eyelid blood perfusion during closure of defects.
Orbit
; 43(4): 464-470, 2024 Aug.
Article
em En
| MEDLINE
| ID: mdl-38687914
ABSTRACT
PURPOSE:
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.METHOD:
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.RESULTS:
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.CONCLUSIONS:
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.Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Fluxo Sanguíneo Regional
/
Pálpebras
Limite:
Aged
/
Aged80
/
Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
Orbit
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
Suécia