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Retrobulbar anesthesia with a flexible catheter
P E Dantas1, M C Nishiwaki-Dantas, M J Henriques
1Department of Ophthalmology, Santa Casa Hospital, Sao Paulo, Brazil.
Ophthalmic Surgery and Lasers
|April 1, 1996
Summary
A novel direct sub-Tenon's anesthesia technique offers a safe and comfortable alternative for intraocular surgery. This method avoids complications associated with traditional methods and ensures precise anesthetic delivery.
Area of Science:
- Ophthalmology
- Anesthesia
Background:
- Traditional retrobulbar and peribulbar anesthesia carry risks of complications.
- Newer techniques like subconjunctival and limbal infiltration have inconveniences.
Purpose of the Study:
- To describe a novel direct sub-Tenon's anesthesia technique for intraocular surgery.
- To evaluate the safety and effectiveness of this new method.
Main Methods:
- A blunt dissection of conjunctiva, Tenon's capsule, and intermuscular septum in the inferior nasal quadrant.
- Insertion of a flexible catheter to the retrobulbar space for anesthetic injection (3.0 ml).
- Technique evaluated in 50 consecutive cases.
Main Results:
- 100% of patients reported the procedure as comfortable and painless.
- No complications were observed during or after the procedure.
- Ultrasonography confirmed accurate catheter placement in the retrobulbar space.
Conclusions:
- The direct sub-Tenon's technique is simple, effective, and safe.
- This method avoids the risks associated with sharp instruments in the orbit.
- It provides a reliable alternative for intraocular surgery anesthesia.