الفهرس 
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Abstract
Retinal detachment is extraocular surgery associated with high incidence of postoperative nausea and vomiting due to extensive traction on the extraocular muscules and placement of buckling material around the globe. General anesthesia or retrobulbar block are the usual methods of providing anesthesia for retinal detachment surgery. Meperidine widely used for analgesia and sedation also produces peripheral nerve block. In this study forty patients ASA I-II aged 40-65 years were selected and randomly distributed into four groups of 10 patients each. We standardized the general anesthesia in the four groups, group II (G/B) received retrobulbar bupivacaine 10mg 0.5% in 2.5 ml volume 15 minutes before induction of general anesthesia, group III (G/M) received retrobulbar meperidine 7.5mg 0.3% in 2.5 ml volume and group IV (G/BM) received retrobulbar mixture of bupivacaine 10mg 0.5% and meperidine 7.5mg 0.3% in 2.5ml volume. Routine intraoperative monitoring of continuous non invasive blood pressure measurement, pulse oximetry, end tidal CO2 and oculocardiac reflex. Postoperative assessment included: assessment of postoperative pain, postoperative nausea and vomiting and postoperative sedation. Our results showed significant reduction of the incidence of OCR, postoperative pain and postoperative nausea and vomiting in both group II and IV, the addition of meperidine 7.5 to retrobulbar block cannot be used as alternative to bupivacaine.