Fig. 1From: Distal radial artery as an alternative approach to forearm radial artery for perioperative blood pressure monitoring: a randomized, controlled, noninferiority trialUltrasound measurements and ultrasound-guided arterial catheterization. a, b, c, distal radial artery (dRA); d, e, f, forearm radial artery (RA). The red lines, circles, arrowheads indicate the diameter, depth, cross-sectional area of the arteries and the catheter needles, respectivelyBack to article page