Table 2.

Results of radial artery cannulation in control group and nitroglycerin group

Variables	Control (N = 47)	Nitroglycerin (N = 47)	p-value
First attempt success rate of radial artery cannulation (%)	36/47 (76.6)	46/47 (97.9)	0.004
Procedure time to success within the first attempt (s)	171 ± 70	111 ± 18	< 0.001
Second attempt success rate within 10 min (%)	43/47 (91.5)	47/47 (100)	0.117
Overall number of attempts (1/2/3 attempts, n)	36/7/4	46/1/0	0.008
Overall complication at first chosen radial artery
Vasospasm	15/47 (31.9%)	3/47 (6.4%)	0.003
Hematoma	6/47 (12.8%)	1/47 (2.1%)	0.111

Values are mean ± SD or number (proportion)