Superficial extraconal blockade for vitreoretinal surgery.

Area of Science:

• Ophthalmology
• Anesthesiology
• Surgical Techniques

Background:

• Ophthalmic block success depends on needle length, with 25 mm being standard.
• Longer needles increase complication risks, especially with staphyloma or scleral buckles.

Purpose of the Study:

• To compare the efficacy of 15 mm versus 25 mm needles for extraconal blocks in vitreoretinal surgery.
• To evaluate anesthetic effectiveness and patient/surgeon satisfaction with different needle lengths.

Main Methods:

• Prospective, randomized, double-blind study involving 120 patients.
• Extraconal blocks performed using either 15 mm or 25 mm needles.
• Anesthesiologist assessed block efficacy; supplementation provided if needed. Patient and surgeon satisfaction were recorded.

Main Results:

• Group receiving 15 mm needles required a significantly higher primary injection volume.
• Both groups showed comparable results in total anesthetic volume, supplementation rates, akinesia, pain scores, and surgeon satisfaction.

Conclusions:

• A 15 mm needle is equally effective as a 25 mm needle for extraconal blockade in posterior segment vitreoretinal procedures.
• Shorter needle length provides comparable efficacy and safety for ophthalmic blocks.