Comparative study of subarachnoid block with 0.75% hyperbaric ropivacaine plus clonidine versus 0.5% hyperbaric bupivacaine plus clonidine in surgeries of lower limbs and lower abdomen

This study is a comparative randomized double blinded study between a newly introduced drug 0.75% hyperbaric ropivacaine with old drug 0.5% hyperbaric bupivacaine. Effect of clonidine as an adjuvant will also be assessed with respect to each drugs. This study will help us to improve the effectiveness of spinal anaesthesia during lower limbs and lower abdominal surgeries. Total 90 patients will be randomly selected of age group >18 years of either gender belongs to ASA grade I and II. 90 patients will be divided into two groups 45 in each by using sealed envelope technique. One group will receive 3 ml of 0.75% ropivacaine plus 45 micrograms clonidine and other will receive 3 ml of 0.5% bupivacaine plus 45 micrograms clonidine and will be given to patients via spinal anaesthesia under all aseptic precautions.