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Cardiopulmonary function at rest and during exercise after resection for bronchial carcinoma
K R Larsen1, U G Svendsen, N Milman
1Department of Pulmonary Medicine, Gentofte Hospital, University of Copenhagen, Denmark.
The Annals of Thoracic Surgery
|November 14, 1997
Summary
Lung resection surgery like lobectomy causes minor changes in lung function and exercise capacity. Pneumonectomy significantly reduces pulmonary volumes but exercise capacity is only slightly impacted.
Area of Science:
- Pulmonary Medicine
- Thoracic Surgery
- Cardiopulmonary Physiology
Background:
- Postoperative spirometry and exercise capacity after lung resection show significant variability.
- Limited research exists on maximal exercise capacity changes following pneumonectomy and lobectomy.
Purpose of the Study:
- To characterize postoperative changes in cardiopulmonary function after lung resection.
- To evaluate the impact of lobectomy and pneumonectomy on lung function and exercise capacity.
Main Methods:
- Prospective study of 97 lung cancer patients undergoing maximal exercise testing, spirometry, and arterial gas tension analysis.
- Follow-up assessments at 6 months post-surgery for 57 patients.
Main Results:
- Lobectomy patients experienced an 8% decrease in forced expiratory volume in 1 second (FEV1) and a 13% reduction in exercise capacity.
- Pneumonectomy patients had a 23% FEV1 decrease, but exercise capacity only decreased by 16%, indicating partial compensation.
- Smaller preoperative forced vital capacity correlated with less pronounced postoperative deterioration in percentages.
Conclusions:
- Lobectomy results in minimal decline in lung function and exercise capacity.
- Pneumonectomy reduces pulmonary volumes to approximately 75% of preoperative levels, with exercise capacity maintained at about 85% of preoperative values.
- Changes in FEV1 are a poor indicator of exercise capacity alterations post-pulmonary resection.