Anesthesia for pars plana vitrectomy with insulin needle, is it possible?

Area of Science:

• Ophthalmology
• Anesthesiology
• Surgical Techniques

Background:

• Peribulbar block is a standard anesthesia technique for posterior segment ocular surgeries.
• The choice of needle length for peribulbar block can influence efficacy and patient comfort.

Purpose of the Study:

• To compare the efficacy of a 12.5 mm needle versus a 25 mm needle for single-injection peribulbar block in retinal surgery.
• To evaluate akinesia, anesthetic volume, surgeon satisfaction, and patient pain between the two needle lengths.

Main Methods:

• A randomized study of 120 patients undergoing retinal surgery.
• Peribulbar block administered using either a 12.5 mm or 25 mm needle with local anesthetic and digital pressure.
• Ocular akinesia assessed at 5 and 10 minutes; supplementary injections administered if needed.
• Surgeon satisfaction and patient pain evaluated using Visual Analogue Scale.

Main Results:

• No significant difference in akinesia scores at 5 or 10 minutes between the 12.5 mm and 25 mm needle groups.
• The 12.5 mm group required a significantly higher total volume of local anesthesia and supplementary injections.
• Surgeon satisfaction and patient intraoperative pain levels were comparable between both groups.

Conclusions:

• A 12.5 mm needle for peribulbar block is a suitable alternative for retinal surgery when combined with digital compression.
• This shorter needle technique provides comparable efficacy and patient experience to the standard 25 mm needle, potentially improving safety profiles.