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Comparison of the efficacy of subtenon with peribulbar local anesthesia without hyaluronidase in patients undergoing cataract surgery.

OBJECTIVE
To compare the efficacy of subtenon with peribulbar local anesthesia without hyaluronidase in patients undergoing cataract surgery.


STUDY DESIGN
A randomized controlled trial.


PLACE AND DURATION OF STUDY
Eye "B" Unit, Khyber Teaching Hospital, Peshawar, from October 2009 to October 2010.


METHODOLOGY
Patients undergoing cataract surgery were divided into two groups. Group A received subtenon anesthesia and group B received peribulbar anesthesia. Pain score, akinesia and intraocular pressure were compared in the two groups. Statistical Package for Social Sciences-14.0 was used for data analysis.


RESULTS
There were 304 patients, 152 patients in each group. At the time of injection, there was less pain in group A as compared to group B (p < 0.001). At the time of surgery and till 90 minutes after administration of anesthesia, there was no significant difference in pain between the 2 groups (p = 0.999 and 0.59 respectively). Group A had better akinesia as compared to group B (p = 0.04). There was a greater rise in mean intraocular pressure just after injection in group B as compared to group A (p < 0.001); in both groups, the intraocular pressure declined to its base level 10 minutes after the injection (p = 0.52).


CONCLUSION
Subtenon anesthesia is less painful at the time of its administration, provides better akinesia and leads to smaller rise in intraocular pressure just after the injection than peribulbar anesthesia.