Study of atropine injection to prevent low blood pressure after spinal anaesthesia in older patients undergoing abdominal and lower limb surgery .

INTERVENTION: Intervention1: Intravenous Atropine: Elderly Patient posted for elective abdominal and lower limb surgery,divided into 2 group .Group A patient who will recieve intravenous route Atropine 0.6mg(1ml) preoperatively before 1 minute of spinal anaesthesia.and group B patient recieve 1 ml of normal saline. After 1 minute of recieving drug ,Subarachnoid Block given Under all aseptic precautions,3ml of 0.5% Bupivacaine given in L3‐L4 intervertebral space via 25‐26 Gauge Quincke Spinal Needle.Duration 60‐200 minute.Reference Miller Anaesthesia 10th edition Control Intervention1: not applicable: not applicable CONDITION: PRIMARY OUTCOME: Incidence of Hypotension following subarachnoid blockTimepoint: Baseline and every minute till surgey SECONDARY OUTCOME: Change in Systolic Blood Pressure,Change in Diastolic Blood Pressure,Change in Mean Arterial Pressure,Incidence of Bradycardia,Requirement of total dose of rescue vasopressor,incidence of adverse effect of atropineTimepoint: 60‐200 minute INCLUSION CRITERIA: ASA GRADE 1 and 2 patient undergoing abdominal and lower limb surgery Controlled HTN