Effect of thoracotomy and lung resection on exercise capacity in patients with lung cancer.
BACKGROUND
Resection is the treatment of choice for lung cancer, but may cause impaired cardiopulmonary function with an adverse effect on quality of life. Few studies have considered the effects of thoracotomy alone on lung function, and whether the operation itself can impair subsequent exercise capacity.


METHODS
Patients being considered for lung resection (n = 106) underwent full static and dynamic pulmonary function testing which was repeated 3-6 months after surgery (n = 53).


RESULTS
Thoracotomy alone (n = 13) produced a reduction in forced expiratory volume in one second (FEV1; mean (SE) 2.10 (0.16) versus 1.87 (0.15) l; p<0.05). Wedge resection (n = 13) produced a non-significant reduction in total lung capacity (TLC) only. Lobectomy (n = 14) reduced forced vital capacity (FVC), TLC, and carbon monoxide transfer factor but exercise capacity was unchanged. Only pneumonectomy (n = 13) reduced exercise capacity by 28% (PVO2 23.9 (1.5) versus 17.2 (1.7) ml/min/kg; difference (95% CI) 6.72 (3.15 to 10.28); p<0.01) and three patients changed from a cardiac limitation to exercise before pneumonectomy to pulmonary limitation afterwards.


CONCLUSIONS
Neither thoracotomy alone nor limited lung resection has a significant effect on exercise capacity. Only pneumonectomy is associated with impaired exercise performance, and then perhaps not as much as might be expected.
Nugent
A M
AM
Department of Medicine, Belfast BT12 6BA, UK.
Steele
I C
IC
Carragher
A M
AM
McManus
K
K
McGuigan
J A
JA
Gibbons
J R
JR
Riley
M S
MS
Nicholls
D P
DP
D005080:Exercise Test; D017079:Exercise Tolerance; D006801:Humans; D008175:Lung Neoplasms / Q000503:physiopathology / Q000601:surgery*; D008875:Middle Aged; D011013:Pneumonectomy / Q000009:adverse effects; D011184:Postoperative Period; D012129:Respiratory Function Tests; D013908:Thoracotomy