Effect of different types of laryngeal mask airway placement on the right internal jugular vein: A prospective randomized controlled trial

Table 3 Relationship between simulated needle path and internal jugular vein and common carotid artery, n (%)

	Group 1, n = 32	Group 2, n = 39	Group 3, n = 29	P value
IJV
Before LMA	31 (96.9)	38 (97.4)	24 (82.8)	0.059
After LMA	24 (75.0)d	31 (79.5)ad	15 (51.7)d	0.036
CCA
Before LMA	6 (18.8)	8 (20.5)	7 (24.1)	0.871
After LMA	19 (59.4)d	17 (43.6)d	13 (44.8)	0.361
IJV and CCA
Before LMA	6 (18.8)	7 (17.9)	3 (10.3)	0.613
After LMA	17 (53.1)d	16 (41.0)d	9 (31.0)	0.215

^aP < 0.05 vs group 3;

^dP < 0.01 vs before laryngeal mask airway within group. IJV: Internal jugular vein; CCA: Common carotid artery; LMA: Laryngeal mask airway.