Posters

A single medial peribulbar (Sub-Tenon) block with either 1% Ropivacaine or a mixture of 1% Ropivacaine and Dexmedetomidine during cataract surgery

Poster Details

First Author: A. Saif EGYPT

Co Author(s):    A. Shaker                    

Abstract Details

Purpose:

The ability of dexmedetomidine to enhance the central and peripheral blockade when added to local anesthetics had been elucidated. No study had included its use during ophthalmic blocks. The aim of this study was to evaluate the efficacy and safety of its addition to ropivacaine 1% during cataract surgery with a peribulbar block.

Setting:

Fayoum University Hospital and Cairo University Hospitals

Methods:

In a randomized, double-blind, prospective study; sixty adult patients scheduled for cataract surgery were included. Patients were randomly allocated into two equal groups; the first group was given a single medial peribulbar injection with 15ropivacaine, and the second group with ropivacaine 1% in addition to dexmedetomidine (10 µg/ml). the onset of the motor block, the total motor block score, the number of cases for re-injection, the rate of perfect blocks, the overall satisfaction of both patients and surgeons about the block as well as the incidence of any systemic or local side effects were recorded and compared in both groups.

Results:

Dexmedetomidine was found to improve the local anesthetic effect of ropivacaine. The onset time of motor block was significantly shorter, the quality of motor block was significantly better (less total motor block score, less need for re-injection, more patients with perfect block) and the overall satisfaction of the patients about the block was significantly higher with the addition of dexmedetomidine to ropivacaine. There was no statistically significant changes in or difference between both groups as regards the hemodynamic variables, the sedation scores and or the incidence of systemic or local side effects.

Conclusions:

The addition of dexmedetomidine (10µg/ml) to ropivacaine 1% during cataract surgery with a single medial peribulbar (sub-tenon) block will improve and enhance the quality of the block without any additional systemic or local side effects. As long as this is the first study about its use in ophthalmic block, further investigations are required to support such conclusions.

Financial Disclosure:

NONE