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Related Experiment Videos

Sub-Tenon's anesthesia for canine cataract surgery.

Kellam D Bayley1, R A Read1

  • 1Veterinary Ophthalmic Referrals, Plympton, SA, Australia.

Veterinary Ophthalmology
|February 8, 2018
PubMed
Summary

Sub-Tenon's anesthesia (STA) offers a viable alternative to systemic neuromuscular blockade (NMB) for canine cataract surgery. This technique provides suitable globe positioning for surgery without negatively impacting intraocular pressure.

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Area of Science:

  • Veterinary Ophthalmology
  • Surgical Anesthesia

Background:

  • Canine cataract surgery requires precise surgical conditions.
  • Systemic neuromuscular blockade (NMB) is a common method to achieve ocular stability.
  • An alternative anesthesia technique is needed to improve surgical exposure.

Purpose of the Study:

  • To evaluate sub-Tenon's anesthesia (STA) as an alternative to NMB in dogs undergoing cataract surgery.
  • To assess the efficacy of STA in providing adequate globe positioning and surgical conditions.

Main Methods:

  • A prospective, controlled clinical study involving 12 dogs with bilateral cataracts.
  • One eye received STA, while the contralateral eye received NMB for comparison.
  • Measurements included intraocular pressure, globe position, rotation, pupillary dilation, and vitreal expansion.
Keywords:
canine cataract surgeryglobe akinesiamydriasisneuromuscular blockaderetrobulbar anesthesiasub-Tenon's anesthesia

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Main Results:

  • STA resulted in suitable globe positioning for cataract surgery.
  • STA caused greater anterior globe displacement compared to NMB.
  • No significant changes in intraocular pressure were observed with STA.

Conclusions:

  • Sub-Tenon's anesthesia is an effective alternative to NMB for canine cataract surgery.
  • STA may enhance surgical exposure, particularly in breeds with deep-set eyes.