Comparison of the accuracy of three methods measured the length of the right main stem bronchus by chest computed tomography as a guide to the use of right sided double-lumen tube

Table 1 Demographic characteristics of patients

Characteristics of patients	C-P (n = 56) CP ≥ 14 mm	C-D(n = 56) CD ≥ 20 mm	C-C (n = 56) CC ≥ 24 mm	P
Age (years)	54.8 ± 12.5	55.6 ± 12.9	53.4 ± 13.4	0.68
Gender (M/F, n)	36/20	40/16	34/22	0.48
ASA (I/II, n)	23/33	28/28	32/24	0.23
Weight (kg)	67.2 ± 10.7	69.6 ± 9.9	66.5 ± 9.6	0.93
Height (cm)	167.4 ± 8.0	167.7 ± 7.9	166.3 ± 7.9	0.59
BMI (kg/m²)	23.9 ± 2.8	24.8 ± 2.9	24.2 ± 3.0	0.79
Time of operation (min)	141.7 ± 59.0	151.2 ± 68.0	165.8 ± 71.0	0.16
Time of OLV (min)	112.0 ± 54.1	113.6 ± 59.3	126.9 ± 61.2	0.34
length of RMSB(mm)	17.2 ± 2.3	25.4 ± 3.7	28.5 ± 3.1	0.00

ASA American Society of Anesthesiologists, BMI Body mass index, CP Carina-proximal distance, CD Carina to distal distance, CC Carina to carina distance, OLV One lung ventilation, RMSB Right main stem bronchus

ISSN: 1471-2253