Document Detail

Exercise capacity of thoracotomy patients in the early postoperative period.
MedLine Citation:
PMID:  10936129     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: We investigated the mechanism involved with the initial drop and subsequent recovery of exercise capacity in the early postoperative period of thoracotomy patients. METHODS: Sixteen patients (13 who had undergone lobectomy, 3 who had undergone pneumonectomy) underwent a routine pulmonary function test (PFT) and a cardiopulmonary exercise test preoperatively, within 14 postoperative days (POD; post-1; mean +/- SD, 9 +/- 2 POD), and after 14 POD (post-2; mean, 26 +/- 12 POD). RESULTS: After surgery on post-1, PFT results of FVC, FEV(1), and maximum ventilatory volume (MVV) significantly decreased. Oxygen uptake (VO(2)) at a venous blood lactate level of 2.2 mmol/L (La-2. 2), which was adopted as the empirical anaerobic threshold, and maximum V O(2) (VO(2)max) decreased significantly to 88.2 +/- 7.9% and 73.1 +/- 15.4% of the preoperative values, respectively. La-2.2 min ventilation (VE)/ MVV and maximum VEmax)/MVV increased significantly from 0.36 +/- 0.08 to 0. 66 +/- 0.20 and from 0.58 +/- 0.14 to 0.80 +/- 0.09, respectively. On post-2, though La-2.2 VO(2) did not change, VO(2)max improved significantly to 81.5 +/- 19.7% of the preoperative values, in association with significant increases in maximal tidal volume and VEmax, which were produced by significant increases in the PFT results. La-2.2 VE/MVV also decreased significantly to 0.49 +/- 0.13, which indicated a sufficient recovery of respiratory reserve at submaximal exercise. CONCLUSIONS: The initial drop of exercise capacity after lung resection seems to be derived from both circulatory and ventilatory limitations. Further, the subsequent recovery within 1 month seems to be produced by an improvement in ventilatory limitation, which was caused by the surgical injury to the chest wall.
S Miyoshi; T Yoshimasu; T Hirai; I Hirai; S Maebeya; T Bessho; Y Naito
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Chest     Volume:  118     ISSN:  0012-3692     ISO Abbreviation:  Chest     Publication Date:  2000 Aug 
Date Detail:
Created Date:  2000-09-05     Completed Date:  2000-09-05     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0231335     Medline TA:  Chest     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  384-90     Citation Subset:  AIM; IM    
General Thoracic Surgery, Department of Surgery, Osaka University Graduate School of Medicine, Japan.
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MeSH Terms
Adaptation, Physiological / physiology*
Aged, 80 and over
Exercise Test
Exercise Tolerance / physiology*
Follow-Up Studies
Lung Diseases / physiopathology*,  surgery
Middle Aged
Postoperative Period
Recovery of Function / physiology*
Respiratory Function Tests
Comment In:
Chest. 2001 Nov;120(5):1747-8   [PMID:  11713167 ]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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