Comparative evaluation of the efficacy and safety of INTRATHECAL 0.5% hyperbaric Levobupivacaine with 0.5% hyperbaric Bupivacaine in patients undergoing LSCS under spinal anesthesia

After obtaining approval from hospital ethical committee and written informed consent, patients will be divided into two groups randomly. All patients will be assessed before surgery for anesthesia fitness. Patients will be prepared by fasting (8 h for solid foods, 4 hours for clear fluids). On arrival to the operating room, ASA standard monitoring will be applied to all patients, including pulse oximeter, electrocardiogram and noninvasive arterial blood pressure. An 18/20 -gauge intravenous catheter will be placed and 10ml/kg lactated Ringer solution as preloading before spinal Anesthesia will be given to all patients, Under all aseptic precautions subarachnoid block will be performed at L3-L4 interspace with patient in sitting position, using either 2.2ml of 0.5% hyperbaric Levobupivacaine (Group L) or 2.2 ml of 0.5% hyperbaric Bupivacaine (Group B). After spinal block, patients will be placed in supine position and oxygen will be provided via a facemask. Sensory and motor block will be assessed by an anesthesiologist. The segmental level of sensory block will be assessed by loss of sensation to pin-prick.