Needle Puncture Point During Central Venous Catheterization With Ultrasound Guidance

Position of Puncture Point of the Introducer Needle During Internal Jugular Venous Catheterization With Ultrasound Guidance

In this observational study, we will measure the shortest distance from the cricoid cartilage level to the puncture site of the introducer needle when anesthesiologists perform central venous catheterization.

After anesthesia induction and tracheal intubation, we will prepare central venous catheterization for patients requiring it. After anesthesiologists who are blinded to this study perform central venous catheterization, an investigator measured the shortest distance from the crease line of the cricoid cartilage to the puncture site of the introducer needle.

Inclusion Criteria:

• elective surgery under general anesthesia
• requirement of central venous catheterization

Exclusion Criteria:

• disagreement for participation