Effect of shoulder positioning on ultrasonic visualisation of the subclavian vein in healthy adults: A prospective observational study

Introduction: Ultrasound guidance is commonly used during central venous cannulation. Subclavian vein a chosen site, but previous studies found varying results in the ideal positioning of shoulder for subclavian The objective this study to determine which position greatest cross-sectional area right Methods: In prospective observational study, ultrasound was performed on healthy adult volunteers visualise three different positions: neutral, abduction and retraction. A blinded independent investigator measured areas by computer software using planimetry method. Statistical analysis one-way repeated measures variance. Results: Forty-four adults participated study. mean retraction positions were 1.05 ± 0.33 cm 2 , 1.01 0.31 0.82 0.28 respectively. When compared retraction, significantly increased neutral ( P < 0.01) positions. There no significant difference between = 0.71). Conclusion: Positioning or may be more guided