title: Predicting postoperative exercise capacity after major lung resection.
abstract: OBJECTIVE
  This study investigates whether postoperative exercise capacity can be predicted from preoperative lung perfusion scintigraphy and the number of subsegments resected.
  
  
  METHODS
  We studied 315 patients, with 158 being assigned odd numbers and 157 being assigned even numbers. In the 158 patients assigned odd numbers, the predicted postoperative VO2 max/m2 (ppo VO2 max/m2) was obtained from the results of lung perfusion scintigraphy and the number of subsegments scheduled for resection. We then examined correlations with the actual values, 2 weeks and 1 month postoperatively, to obtain a regression equation (Series 1). In the 157 patients assigned even numbers, the ppo VO2 max/m2 corrected by the regression equation derived from Series 1 (corrected-ppo VO2 max/m2) was compared with the actual values, 2 weeks and 1 month postoperatively, to establish whether the postoperative VO2 max/m2 could be predicted.
  
  
  RESULTS
  The regression equation between the ppo VO2 max/m2 and its actual value was y = 0.83x + 103, 2 weeks postoperatively, and y = 0.923x + 82, 1 month postoperatively. The difference between the corrected-ppo VO2 max/m2 and the actual postoperative value was small.
  
  
  CONCLUSIONS
  Calculating the residual [Formula: see text]o2 max/m2 preoperatively from the results of lung perfusion scintigraphy and the number of segments scheduled for resection is useful for predicting postoperative exercise capacity.
authors: Department of Thoracic Surgery, Omuta City Hospital, 2-19-1 Takarazaka-machi, Omuta, Fukuoka, 836-8567, Japan. nagam2@nifty.com.
authors: Yoshinori
authors: Y
authors: Nagamatsu
authors: Department of Surgery, Omuta City Hospital, Ohmuta, Fukuoka, Japan.
authors: Susumu
authors: S
authors: Sueyoshi
authors: Department of Surgery, Omuta City Hospital, Ohmuta, Fukuoka, Japan.
authors: Tatsuji
authors: T
authors: Tsubuku
authors: Department of Respiratory Medicine, National Hospital Organization Omuta National Hospital, Ohmuta, Fukuoka, Japan.
authors: Masayuki
authors: M
authors: Kawasaki
authors: Department of Surgery, School of Medicine, Kurume University, Kurume, Fukuoka, Japan.
authors: Yoshito
authors: Y
authors: Akagi
mesh_terms: D000368:Aged; D005080:Exercise Test; D017079:Exercise Tolerance / Q000502:physiology*; D005260:Female; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D008175:Lung Neoplasms / Q000000981:diagnostic imaging / Q000503:physiopathology* / Q000601:surgery*; D008176:Lung Volume Measurements; D008297:Male; D008875:Middle Aged; D055420:Perfusion Imaging; D011013:Pneumonectomy; D011184:Postoperative Period; D011237:Predictive Value of Tests; D057234:Preoperative Period
keywords: Exercise testing; Lung cancer surgery; Lung physiology; Postoperative care