Comparison of two technique of insertion of invasive blood pressure monitoring with or without waveform assistance: a prospective, randomized controlled trial

INTERVENTION: Intervention1: Direct waveform analysis: A pressure transducer will be connected to arterial cannula with pressure monitoring line. Radial artery will be identified with palpation method and radial artery cannulation done with direct appearance of arterial waveform on the monitoring Control Intervention1: Plapation: Here, arterial cannulation will be done by palpation of radial artery, no other aids will be used. CONDITION: Health Condition 1: O‐ Medical and Surgical PRIMARY OUTCOME: Comparison of first attempt success rate among both techniqueTimepoint: At the time of arterial puncture SECONDARY OUTCOME: 1. Time to successful cannulation ; 2. Number of re‐directives ; 3. Number of attempts to achieve cannulation ; 4. Overall success/failure rate ; 5. Complications such as hematoma, vasospasm etc.Timepoint: At the time of arterial puncture INCLUSION CRITERIA: Adult patients who require arterial cannulation under general anaesthesia for elective surgery