A Randomised comparison of ultrasound- guided versus palpation techniques for Radial artery cannulation by residents in a teaching institution.

This is a randomized, parallel-group, single-center studycomparing the palpatory method and ultrasound-guided radial artery cannulation. The primary outcome will measure the number of patients whose arterial cathetersuccessfully inserted at the first attempt. The secondary outcomes will measurenumber of attempts needed for successful arterial catheter placement in boththe methods, the time required for successful cannulation, the number of sites usedfor successful cannulation, total catheters being used for cannulation, rate ofcomplications and a total number of operators required in both the methods.