European journal of emergency medicine : official journal of the European Society for Emergency Medicine
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Randomized Controlled Trial Observational Study
'Stop sign' position for subclavian ultrasound: a single-blinded observational study of subclavian vein dimensions.
Right subclavian vein (SCV) dimensions were evaluated on ultrasound and whether these change when the right upper limb is in a neutral position compared with the 'stop sign' position (shoulder abducted and externally rotated to 90°, elbow flexed to 90°), and when patients were positioned 30° head-up compared with lying supine. ⋯ Utilizing the stop sign position does not change SVC dimensions when patients are supine, however, may improve dimensions when lying supine is contraindicated.