A randomized controlled trial of ultrasound-assisted technique versus conventional puncture method for saphenous venous cannulations in children with congenital heart disease

Table 3 Baseline characteristics of study participants assigned to the ultrasound-assisted or the conventional puncture group to peripheral intravenous catheterization

	ultrasound-assisted group	. conventional puncture group	P-value
Age (month)	7(5–9)	7(4–9)	0.445
Sex (male/female)	48/24	43/29	0.449
BMI (kg/cm²)	16.31 + 1.94	16..56 + 2.24	0.186
Previous history of difficult access, %(Y/N)	15.3%(11/61)	16.7%(12/60)	0.803
Comorbidity, %(Y/N)	13.9%(10/62)	5.6%(4/68)	0.114
Venous grading(I/II/III)	5/13/54	4/11/57	0.509

ISSN: 1471-2253