Table 1.
Baseline Patient Characteristics
| Parameters | Group A (n = 47) | Group B (n = 44) | P value |
|---|---|---|---|
| Age (yr) | 52.2 ± 11.9 | 48.8 ± 14.5 | 0.294 |
| Sex (M/F) | 39/8 | 30/14 | 0.099 |
| Height (cm) | 164.4 ± 7.0 | 164.2 ± 10.0 | 0.726 |
| Weight (kg) | 62.8 ± 10.8 | 61.7 ± 11.8 | 0.617 |
| BMI (kg/m2) | 23.1 ± 3.1 | 22.8 ± 3.9 | 0.335 |
| ASA-PS | 0.325 | ||
| I | 27 | 29 | |
| II | 18 | 15 | |
| III | 2 | 0 | |
| Types of surgeries | 0.900 | ||
| Lung resection surgeries | 31 | 27 | |
| Esophageal | 11 | 12 | |
| Other surgeries | 5 | 5 | |
| Surgical approach | 0.394 | ||
| Robotic | 11 | 7 | |
| VATS | 13 | 18 | |
| Open | 23 | 19 | |
| Size of DLTs inserted | 0.134 | ||
| 28 F | 1 | 1 | |
| 32 F | 0 | 1 | |
| 35 F | 5 | 10 | |
| 37 F | 28 | 15 | |
| 39 F | 13 | 17 | |
| Side of DLT used | 0.608 | ||
| Left DLT | 46 | 42 | |
| Right DLT | 1 | 2 |
Values are expressed as mean ± SD or number of patients. Group A: auscultation group, Group B: lung ultrasound group. BMI: body mass index, ASA-PS: American Society of Anesthesiologists physical status, DLT: double lumen tube, VATS: video-assisted thoracoscopic surgery.