Comparison of an Ultrasound-Guided Dynamic Needle Tip Positioning Technique and a Long-Axis In-Plane Technique for Radial Artery Cannulation in Older Patients: A Prospective, Randomized, Controlled Study.

Objectives: The authors compared the dynamic needle tip positioning (DNTP) technique and the long-axis in-plane (LAIP) technique in older patients.

Design: This was a prospective randomized controlled study.

Setting: The study was conducted at a single institution (Hanyang University hospital).