Abstract
The purpose of this study was to compare efficiency and safety of the prolonged Sub-Tenon block in comparison with IV 100 mg tramadol for long vitreoretinal surgery ander general anesthesia. 74 patients were undergoing microinvasive vitrectomy. For the prolonged Sub-Tenon block 1% solution of lidocaine at the speed of 2 ml/hour was used. The value of block of oculovisceral reflexes, HR and MAP, the need for muscle relaxants, time of awakening and time of removal of a laryngeal mask, postoperative pain and analgesia requirements, and postoperative nausea and vomiting were recorded. In prolonged Sub-Tenon block group there was more effective blocking of oculocardiac and oculovasomotor reflexes, a smaller average dose of muscle relaxants, shorter awakening time and removal of a laryngeal mask, and also lower pain syndrome in the first 24 hours after surgery. Postoperative nausea and vomiting also was in Sub-Tenon block group considerably less frequent than in tramadol group. Use of the prolonged Sub-Tenon block with the general anesthesia is an effective and safe technique for vitreoretinal surgery.
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