Table 1.
Characteristics of the included studies.
| Author, year | Country | Design | Enrolled Patient (M/F) | Mean age | Type of surgery | Type of DLT | Diagnostic tool used | Reference standard |
|---|---|---|---|---|---|---|---|---|
| Sustic et al., 2010 | Croatia | Prospective RCT | 50 (29/21) | 58.5 | Elective thoracic | Left | LUS: lung sliding sign; Clinical examination; chest wall movement | FOB |
| Álvarez-Díaz et al., 2014 | Spain | Prospective Observational study | 105 (N/A) | 53.7 | Elective thoracic | N/A | LUS: lung sliding sign; Clinical examination; chest wall movement and breathing sound | FOB |
| Parab et al., 2015 | India | Prospective Non-RCT | 70 (50/20) | 48.3 | Elective thoracic | Left | LUS: lung sliding sign; Clinical examination; chest wall movement | Visual confirmation |
| Hu et al., 2017 | China | Prospective Non-RCT | 103 (51/52) | 56.1 | Elective thoracic | Both | LUS: lung sliding sign; Auscultation; breathing sound | FOB |
| Parab et al., 2019 | India | Prospective RCT | 91 (69/22) | 50.6 | Elective thoracic | N/A | LUS: lung sliding sign; Auscultation; breathing sound | FOB |
| Chung et al., 2020 | Korea | Prospective RCT | 88 (36/52) | 64.0 | Elective thoracic | Left | LUS: lung sliding sign; Auscultation; breathing sound | FOB |
| Park et al., 2021 | Korea | Prospective RCT | 69 (15/54) | 46.3 | Elective thoracic | N/A | LUS: lung sliding sign; Auscultation; breathing sound | FOB |
| Kanavitoon et al., 2022 | Thailand | Prospective RCT | 195 (86/109) | 60.5 | Elective thoracic | Left | LUS: lung sliding sign; FOB; correct positioning | Visual confirmation |
M: male; F: female; DLT, double-lumen endotracheal tube; FOB, fiberoptic bronchoscopy; RCT: randomized controlled trial; LUS, lung ultrasound; N/A: not available.