Medial canthus single-injection peribulbar anesthesia: a prospective randomized comparison with classic double-injection peribulbar anesthesia.
OBJECTIVE
The authors report the first prospective randomized comparison of the medial canthus single-injection peribulbar anesthesia (also called caruncular anesthesia) with the classic double-injection peribulbar technique.


METHODS
One hundred patients scheduled for cataract surgery were randomly assigned to either a single medial canthus injection or a double peribulbar injection of mepivacaine 2%. The amount of anesthetic agent injected was clinically adapted to each patient. Akinesia, volume injected, pain, reinjections, and complications were assessed after the procedure.


RESULTS
The medial canthus single-injection peribulbar anesthesia was significantly less painful and required less anesthetic agent than the double-injection peribulbar anesthesia. Akinesia score and the reinjection rate were similar in the 2 groups, whereas chemosis was significantly more frequent in the double-injection group.


CONCLUSIONS
Medial canthus single-injection peribulbar anesthesia appears to be an effective alternative to the usual double-injection peribulbar anesthesia.
Deruddre
Stéphane
S
Department of Anesthesiology and Intensive Care Medicine, CHU de Bicêtre, Le Kremlin-Bicetre, France.
Benhamou
Dan
D
D000368:Aged; D000765:Anesthesia, Conduction; D000779:Anesthetics, Local / Q000008:administration & dosage* / Q000009:adverse effects; D002387:Cataract Extraction; D005260:Female; D006801:Humans; D008297:Male; D008619:Mepivacaine / Q000008:administration & dosage / Q000009:adverse effects; D010147:Pain Measurement / Q000187:drug effects; D011446:Prospective Studies
D000779:Anesthetics, Local; D008619:Mepivacaine