retrobulbar block
Pronunciation: ret-ro-bul-bar
Anesthetic injection behind the eyeball to provide surgical anesthesia and akinesia.
Full Definition
A retrobulbar block is a regional anesthetic technique where local anesthetic is injected into the retrobulbar space behind the eyeball to provide anesthesia and paralysis of the extraocular muscles during eye surgery. The injection is typically performed using a needle inserted through the lower eyelid, targeting the space within the muscle cone behind the eye. This technique provides excellent anesthesia for intraocular procedures but carries risks including retrobulbar hemorrhage, optic nerve damage, and brainstem anesthesia. Many surgeons now prefer peribulbar or topical anesthesia techniques due to improved safety profiles.
Usage
Usage note: Specify anesthetic agent and additives when documenting. Note any complications immediately.
In Context
- "A retrobulbar block was administered using 2% lidocaine with hyaluronidase." — Anesthesia record
- "The surgeon opted for topical anesthesia instead of retrobulbar block to minimize complications." — Operative note