The efficacy and safety of uniportal video-assisted thoracic surgery on the treatment for stage II-III tuberculous empyema: a single-arm clinical retrospective study from 2016 to 2021 in a thoracic surgery center in China

Table 2 Perioperative Details of surgery

Perioperative Details	Patients n = 439	Stage II n = 65	Stage III n = 374	P
Operative time(hours)	2.6(1.9, 4.3)	2.2(1.8, 3.1)	3.2(2.0, 5.1)	0.02*
Intraoperative blood loss(ml)	356 (240, 940)	300 (200, 800)	490 (370, 1500)	0.01*
Blood transfusion (n,%)	38 (8.66 )	2 (3.08)	36 (9.63)	0.03*
Hospital stay(days)	6 (4,12)	4(4,6)	7 (5,12)	0.03*
Additional pneumonectomy (n,%)	37 (9.89)	0	37(9.89)	0.00*
wedge resection	28	0 (0.00)	28 (7.49)	0.00*
lobectomy	9	0 (0.00)	9 (2.41)
Duration of chest tube drainage(days)	12 ( 7,49)	10(7,12)	16 (14, 49)	0.01*
Lung re-expansion (n,%)
Complete re-expansion	380 ( 86.56)	65(100.00)	315 (84.22)	0.00*
Incomplete re-expansion	59(13.44)	0(0.00)	59 (15.78)
Persistent air leak (n,%)
5–14 days	379 ( 86.33)	60 ( 92.31)	319 (85.29)	1.75
> 14 days	55 ( 12.53)	0 (0.00)	55 ( 14.71)	0.00*
Improvement in lung function(mean)
FEV1	10.3 ± 3.9	8.2 ± 3.2.	13.4 ± 5.3	0.03*
FVC	13.6 ± 4.2	9.5 ± 2.9	17.7 ± 5.5	0.02*
Recurrence (n,%)
Early recurrence	11(2.51)	0 (0.00)	11(2.94)	0.33
Late recurrence	2 ( 0.46)	0 (0.00)	2(0.53)	0.68

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