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Table 5 Postoperative changes in pulmonary function tests (expressed as a percent of preoperative values)

From: Continuous paravertebral block by intraoperative direct access versus systemic analgesia for postthoracotomy pain relief

Pulmonary function test

Time of test

TPVB group (n = 32)

SA group (n = 31)

P value

Forced vital capacity (FVC), mean ± SD

24 h

54 ± 9

26 ± 12

< 0.001

48 h

65 ± 11

33 ± 13

< 0.001

72 h

70 ± 12

46 ± 10

0.007

Forced expiratory volume in 1 s (FEV1), mean ± SD

24 h

60 ± 10

29 ± 12

< 0.001

48 h

71 ± 12

36 ± 11

< 0.001

72 h

76 ± 11

48 ± 10

0.003

Peak expiratory flow rate (PEFR), mean ± SD

24 h

58 ± 11

28 ± 11

< 0.001

48 h

69 ± 14

38 ± 12

< 0.001

72 h

75 ± 12

49 ± 13

0.001

  1. Pulmonary function tests (expressed as a percent of preoperative values) presented as mean ± SD
  2. TPVB thoracic paravertebral block, SA systemic analgesia