Abstract
Knee arthroscopies are being increasingly performed as day care procedures both under local anaesthesia and subarachnoid block. This study was designed to compare local anaesthesia and lumbar subarachnoid block for outpatient knee arthroscopies in terms of intraoperative haemodynamic changes and surgical condition, postoperative pain, postoperative side effects and discharge time. Fifty adult patients (ASA grade I and II) of 16-75 years were randomly divided into two groups. Groups A received lumbar subarachnoid block with 20mg of 1% lignocaine hydrochloride and 20μg fentanyl citrate. Group B received an infusion of 1% propofol started at 1-3.5mg/kg/hr and titrated to patient comfort. 15-20ml of 2 % lignocaine hydrochloride with 1:2,00,000 adrenaline was injected into the knee joint and an additional 2-3ml was injected into the portal sites. It was observed that:a) outpatient knee arthroscopy can be effectively conducted under local anaesthesia with propofol infusion and selective subarachnoid block. b) “Ability to void” prolongs the discharge time in the subarachnoid block group
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