Effective Arm Down Posture at the Time of Peripheral Venous Cannulation－Aiming for A Simple Vasodilation－

Abstract

　Purpose: This study aims to examine the optimal posture with arm down at the time of peripheral venous cannulation. To establish this, the study compared the venous dilatation effects of different angles of head up tilt.
　Participants and Methods: Twenty healthy females in their 20s and 30s with normal BMI enrolled in the study. We measured basic data (age, height, weight, BMI, arm circumference, thickness of triceps subcutaneous fat, blood pressure, and body temperature) and venous factors (cross-sectional area, depth, and venous perimeter, vertical and horizontal diameters of veins), and visual and palpable degrees of vein distension at various postures (avascularization in the supine position, avascularization at head up tilt angles 30, 45, and 90 degrees).
　Results: The posture that showed the largest vasodilation was the head up tilt angle of 90 degrees with avascularization; with significant increases or decreases in all venous factors.