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Blood perfusion in Hewes tarsoconjunctival flaps in pigs measured by laser speckle contrast imaging

Ansson, Cu LU ; Sheikh, Rafi LU ; Dahlstrand, Ulf LU ; Hult, Jenny LU ; Lindstedt Ingemansson, Sandra LU and Malmsjö, Malin LU (2018) In JPRAS Open
Abstract (Swedish)
Background

Hewes flap is a tarsoconjunctival eyelid flap, based at the lateral canthal tendon, and rotated and stretched to repair lateral defects in the lower eyelid commonly following tumor surgery. The aim of the present study was to monitor perfusion in a Hewes flap during reconstruction, which to the best of our knowledge, has not previously been done.
Methods

A Hewes tarsoconjunctival eyelid flap was raised and the effects on blood perfusion of rotating the flaps by 90° and 180°, stretching the flaps with a force of 5 or 10 N, and repeated diathermic coagulation was monitored with laser speckle contrast imaging.
Results

Rotating the flaps by 90° did not significantly affect perfusion, while further... (More)
Background

Hewes flap is a tarsoconjunctival eyelid flap, based at the lateral canthal tendon, and rotated and stretched to repair lateral defects in the lower eyelid commonly following tumor surgery. The aim of the present study was to monitor perfusion in a Hewes flap during reconstruction, which to the best of our knowledge, has not previously been done.
Methods

A Hewes tarsoconjunctival eyelid flap was raised and the effects on blood perfusion of rotating the flaps by 90° and 180°, stretching the flaps with a force of 5 or 10 N, and repeated diathermic coagulation was monitored with laser speckle contrast imaging.
Results

Rotating the flaps by 90° did not significantly affect perfusion, while further rotation to 180° reduced blood perfusion to 75% of the baseline value. When the tarsoconjunctival flaps were both rotated 90° and stretched with 5 N, the perfusion was reduced even further, to 63%. A further reduction in perfusion, to 36%, was seen when the higher force of 10 N was applied. Diathermy decreased blood perfusion to 56% after being applied once. Successive applications led to further decreases: 43%, 31%, and 15%, after the second, third and fourth applications.
Conclusions

Perfusion in Hewes tarsoconjunctival flaps is affected by both rotation and stretching, but some perfusion is maintained despite these manipulations. Diathermy, however, has detrimental effects and should be avoided. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
epub
subject
in
JPRAS Open
publisher
Elsevier Ltd
external identifiers
  • scopus:85052651845
ISSN
2352-5878
DOI
10.1016/j.jpra.2018.07.001
language
English
LU publication?
yes
id
a7fcba18-0827-4e30-a0c7-abb2eb65e7a7
date added to LUP
2018-08-27 16:05:05
date last changed
2018-09-27 14:50:37
@article{a7fcba18-0827-4e30-a0c7-abb2eb65e7a7,
  abstract     = {Background<br/><br/>Hewes flap is a tarsoconjunctival eyelid flap, based at the lateral canthal tendon, and rotated and stretched to repair lateral defects in the lower eyelid commonly following tumor surgery. The aim of the present study was to monitor perfusion in a Hewes flap during reconstruction, which to the best of our knowledge, has not previously been done.<br/>Methods<br/><br/>A Hewes tarsoconjunctival eyelid flap was raised and the effects on blood perfusion of rotating the flaps by 90° and 180°, stretching the flaps with a force of 5 or 10 N, and repeated diathermic coagulation was monitored with laser speckle contrast imaging.<br/>Results<br/><br/>Rotating the flaps by 90° did not significantly affect perfusion, while further rotation to 180° reduced blood perfusion to 75% of the baseline value. When the tarsoconjunctival flaps were both rotated 90° and stretched with 5 N, the perfusion was reduced even further, to 63%. A further reduction in perfusion, to 36%, was seen when the higher force of 10 N was applied. Diathermy decreased blood perfusion to 56% after being applied once. Successive applications led to further decreases: 43%, 31%, and 15%, after the second, third and fourth applications.<br/>Conclusions<br/><br/>Perfusion in Hewes tarsoconjunctival flaps is affected by both rotation and stretching, but some perfusion is maintained despite these manipulations. Diathermy, however, has detrimental effects and should be avoided.},
  author       = {Ansson, Cu and Sheikh, Rafi and Dahlstrand, Ulf and Hult, Jenny and Lindstedt Ingemansson, Sandra and Malmsjö, Malin},
  issn         = {2352-5878},
  language     = {eng},
  month        = {07},
  publisher    = {Elsevier Ltd},
  series       = {JPRAS Open},
  title        = {Blood perfusion in Hewes tarsoconjunctival flaps in pigs measured by laser speckle contrast imaging},
  url          = {http://dx.doi.org/10.1016/j.jpra.2018.07.001},
  year         = {2018},
}