A comparative study on efficacy of preoperative evaluation of inferior venacaval collapsibility index,caval aorta index,ratio of diameter of femoral vein to femoral artery in predicting post induction hypotension

After getting approval from institutional research and ethical commitee all consenting patients posted for elective surgery under general anathesia and fulfilling inclusion & exclusion criteria.Documents which information about proposed study will be provided to patients.consent will be obtained.In pre anaesthesia room both IVC:A0 INDEX,IVC COLLAPSIBILITY INDEX,FEMORAL AETERY AND FEMORAL VEIN DIAMETER RATIO will be measured using USG ,Then we will measure intraoperative  bp at every 3 minutes for 15 minutes then thereafter 5 mintes for next 15 minutes.from patients having hypotension we will compare the accuracy of our 3 parameters in predicting post induction hypotension.