Table 2.

Preoperative color Doppler scan measurements of study participants (n=104)

Preoperative color Doppler scan	Mean (±SD)	Minimum	Maximum
Radial artery diameter (mm)	2.07 (±0.36)	1.34	3.12
Peak systolic velocity at radial artery (cm/s)	33 (±8.78)	12	55
Cephalic vein diameter (mm)	1.97 (±0.45)	1.2	4.11
Cephalic vein diameter after applying BP cuff (mm)	2.81 (±0.55)	1.54	4.70
Vein distensibility (mm)	0.83 (±0.55)	0.08	2.03

SD=Standard deviation, BP=Blood pressure