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Related Experiment Videos

Sub-Tenon's anesthesia in vitreoretinal surgery: a needleless technique.

A K Kwok1, M R Van Newkirk, D S Lam

  • 1Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, NT.

Retina (Philadelphia, Pa.)
|August 24, 1999
PubMed
Summary

Needleless regional anesthesia using the sub-Tenon

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Area of Science:

  • Ophthalmology
  • Anesthesiology

Background:

  • Vitreoretinal surgery requires effective anesthesia.
  • Traditional regional anesthesia methods may involve multiple injections or adjunct blocks.

Purpose of the Study:

  • To assess the safety and efficacy of needleless regional anesthesia via the sub-Tenon's route.
  • To evaluate this technique without additional facial nerve or subconjunctival blocks for vitreoretinal procedures.

Main Methods:

  • Prospective study of 48 consecutive patients undergoing vitreoretinal surgery.
  • Recorded anesthetic volume, time, and complications.
  • Assessed patient pain using a visual analog scale and documented analgesic use.

Main Results:

  • 77% of patients required only 1-2 anesthetic infiltrations.

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  • 92% reported low pain scores (0-2 on VAS), with 90% needing no or minimal analgesia.
  • Adequate anesthesia and akinesia were achieved in all patients without complications.

    • Conclusions:

    • Needleless sub-Tenon's regional anesthesia is a safe and effective alternative for vitreoretinal surgery.
    • This method simplifies anesthesia delivery and minimizes patient discomfort.