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Professor Malin Malmsjö, MD, PhD. Photo.

Malin Malmsjö

Professor

Professor Malin Malmsjö, MD, PhD. Photo.

The Effect of Canthotomy on Blood Perfusion During the Repair of Lower Eyelid Defects

Author

  • Johanna V Berggren
  • Kajsa Tenland
  • Khashayar Memarzadeh
  • Rafi Sheikh
  • Jenny Hult
  • Sandra Lindstedt
  • Malin Malmsjö

Summary, in English

PURPOSE: Canthotomy is frequently used to mobilize extra tissue when repairing larger lower eyelid defects. The aim of this study was to explore the effect of canthotomy on blood perfusion and oxygen tension.

METHODS: Eight pigs underwent a wedge resection of the lower eyelid and canthotomy (with cantholysis involving the lateral palpebral artery). The wedge resection was performed 8, 6, and 4 mm from the canthotomy. Perfusion and oxygen tension were monitored in the eyelid between the wedge resection and canthotomy using laser Doppler velocimetry and a Clark electrode. Verapamil was administered, and measurements were also performed 12 hours after surgery, to investigate the possible effects of vasospasm RESULTS:: The wedge resection alone did not affect perfusion. Canthotomy led to a reduction in perfusion; being 60% when the length of remaining eyelid was 8 mm, 32% when it was 6 mm, and 24% when it was 4 mm. Similar results were observed for oxygen tension. Vasospasm did not affect the results.

CONCLUSIONS: Canthotomy in combination with a wedge resection of the lower eyelid affects blood perfusion. A smaller length of remaining eyelid tissue will have less perfusion. This may not have any implications in cases of direct closure, but may play a role when the eyelid is to provide oxygen and nutrients to avascular grafts.

Department/s

  • Ophthalmology Imaging Research Group
  • Ophthalmology, Lund
  • Clinical Sciences, Helsingborg
  • StemTherapy: National Initiative on Stem Cells for Regenerative Therapy
  • Thoracic Surgery

Publishing year

2020-03

Language

English

Pages

135-138

Publication/Series

Ophthalmic Plastic and Reconstructive Surgery

Volume

36

Issue

2

Document type

Journal article

Publisher

Lippincott Williams & Wilkins

Topic

  • Ophthalmology

Status

Published

Research group

  • Ophthalmology Imaging Research Group

ISBN/ISSN/Other

  • ISSN: 1537-2677