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Predicted Versus Observed FEV1 and Dlco After Major Lung Resection: A Prospective Evaluation at Different Postoperative Periods Alessandro Brunelli, MD, Majed Refai, MD, Michele Salati, MD, Francesco Xiumé, MD, Armando Sabbatini, MD The Annals of Thoracic Surgery Volume 83, Issue 3, Pages (March 2007) DOI: /j.athoracsur Copyright © 2007 The Society of Thoracic Surgeons Terms and Conditions
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Fig 1 (A) The actual and predicted postoperative (apo/ppo) forced expiratory volume in 1 second (FEV1) ratio at each postoperative evaluation time (discharge, 1 month, and 3 months) of patients with chronic obstructive pulmonary disease (COPD [48 cases]) and without COPD (132 cases) undergoing lobectomy (COPD defined as FEV1 < 80% and FEV1/forced vital capacity [FVC] ratio < 0.7). Only lobectomy patients with complete evaluations at discharge, 1, and 3 months were displayed (180 cases). (0 = non-COPD; 1 = COPD.) (Line = FEV1 ratio; vertical lines = 95% confidence limits.) (B) The apo/ppo carbon monoxide lung diffusion capacity (Dlco) ratio at each postoperative evaluation time (discharge, 1 month, and 3 months) in patients with COPD (48 cases) and without COPD (132 cases) undergoing lobectomy (COPD defined as FEV1 80% and FEV1/FVC ratio < 0.7). Only lobectomy patients with complete evaluations at discharge, 1 month, and 3 months were displayed (180 cases). (0 = non-COPD; 1 = COPD.) (Line = Dlco ratio; vertical lines = 95% confidence limits.) The Annals of Thoracic Surgery , DOI: ( /j.athoracsur ) Copyright © 2007 The Society of Thoracic Surgeons Terms and Conditions
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Fig 2 Plot of the cumulative predicted postoperative (ppo) forced expiratory volume in 1 second (FEV1) values (dashed line) against the observed ones (solid line) at 3 months, stratified by groups of patients with increasing ppoFEV1 (observed and predicted postoperative FEV1 expressed as percentage of predicted for age, sex, and height). The Annals of Thoracic Surgery , DOI: ( /j.athoracsur ) Copyright © 2007 The Society of Thoracic Surgeons Terms and Conditions
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Fig 3 Plot of the cumulative predicted postoperative (ppo) carbon monoxide lung diffusion capacity (Dlco) values (dashed line) against the observed ones (solid line) at 3 months stratified by groups of patients with increasing ppoDlco (observed and predicted postoperative Dlco expressed as percentage of predicted for age, sex, and height). The Annals of Thoracic Surgery , DOI: ( /j.athoracsur ) Copyright © 2007 The Society of Thoracic Surgeons Terms and Conditions
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