表 2. Comparison of puncture sites between the IC-ECG group and the control group.

IC-ECG组与对照组患儿穿刺部位比较

Group	n	Puncture sites/case (%)
		BV	MCV	AV	STV	DMV	CV
IC-ECG: Intracavitary electrocardiogram; BV: Basilic vein; MCV: Median cubital vein; AV: Axillary vein; STV: Superficial temporal vein; DMV: Dorsal metacarpal vein; CV: Cephalic vein.
Control	105	48 (45.7)	19 (18.1)	19 (18.1)	8 (7.6)	10 (9.5)	1 (1.0)
IC-ECG	105	45 (42.9)	21 (20.0)	17 (16.2)	11 (10.5)	8 (7.8)	3 (2.9)
χ 2		0.174	0.124	0.134	0.521	0.243	0.255
P		0.781	0.861	0.855	0.631	0.806	0.621