Anesthetic and akinetic effects of 1% ropivacaine given in two different peribulbar block; single medial canthus or double in jection technique

ABSTRACT

Owing to the advanced age of. patients scheduled for cataract and IOL insertion, and the high concentrations of local anesthetic used in peribulbar blockade, the use of ropivacaine produces an effective motor blockade with minimal risks for neuro and cardiotoxicity. Concerning globe injury due to multiple injections the new single injection medial canthus is theoretically preferred to decrease the frequency of globe injury. In this study we used ropivacaine evaluating its effectiveness in single and double injection peribulbar technique aiming to get the benefit of the drug and the best method of administration in peribulbar blockade. This single blind study was done on 60 patients ASA 1-111 underwent cataract and IOL insertion surgery. Patients were taken peribulbar block using 8 ml. 1% ropivacaine with 30 lU/ml hyalurinidase. Patients were classified into two equal groups; groupl [n.30] is the single injection group group 2[n.30] is the double injection group. Eye globe and lid akinesia and anesthesia, the need for supplementary injection and the incidence of complications like ecchemosis/high intra ocular pressure nausea, vomiting and pain were recorded. This study, concluded that,26 patients [86.6%] of single injection group VS 28 patients [93.3%] in double injection group were having complete anesthesia and akinesia after giving block, only 4 patients in group 1 [13.3%] needed supplementation of block VS 3 patients [10%] in group 2 with almost no difference in absence of intra and post operative complications. 1% Ropivacaine is a suitable agent for single injection peribulbar anesthesia for cataract surgery