The Site of Puncture in Ultrasound-guided Prelocation Technique of the Internal Jugular Venous Catheterization: Non-inferiority Randomized Clinical Trial

The investigator's own developed screen-rotating program is used. An accelerometer is attached on the front surface of the ultrasound (US) probe. The angle of rotation of the probe is delivered to the laptop and becomes the information to adjust the rotating angle of screen. Immediately after induction of general anesthesia, the patient's head is turned slightly, and the table is tilted at 10 degrees. In the US group, the investigators obtain a sonographic view and try a cannulation of the internal jugular vein (IJV). In the prelocation group, a skin marker is made on the anticipated skin puncture site where a perpendicular line that passes over the center of the IJV meets the skin on the rotated US screen. It is recorded "success" when the internal jugular vein is successfully punctured without complications. It is recorded "failure" if the internal jugular vein is not punctured during repeated needle passes. The number of tries and tile to success are recorded. The success and complication rates between two groups are compared.