Evaluation of effectiveness of fluid management using ultrasound guided inferior vena cava collapsibility index in preventing spinal anaesthesia induced hypotension in urology surgeries - An open-label randomized controlled study

A total of 100 patients belonging to age group 18 years to 65 years , ASA  1 and 2 undergoing urology surgeries will be studied,In this open-label randomized controlled trial a total of 100 patients will be divided into two groups Group A (preloading with 10ml/kg crystalloids) and Group B(optimising the fluid status by IVCCI preoperatively).Both the groups will undergo subarachnoid blockade using 2.5ml of Inj.Ropivacaine 0.75% using 25gauge quicke needle at L3-L4 vertebral space.If patients develop hypotension(defined as 20% drop in mean arterial pressure from baseline) 10ml/kg crystalloids will be administered initially followed by vasopressor ephedrine in 6mg bolus dose till mean arterial blood pressure increase to more than 70mmhg.Data collection will be done by measuring the volume of crystalloids, vasopressor ephedrine given and and difference in incidence of hypotension will be assessed.