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Effectiveness of a perioperative pulmonary rehabilitation program following coronary artery bypass graft surgery in patients with and without COPD

Authors Chen JO, Liu JF, Liu YQ, Chen YM, Tu ML, Yu HR, Lin MC, Lin CC, Liu SF

Received 24 November 2017

Accepted for publication 23 February 2018

Published 16 May 2018 Volume 2018:13 Pages 1591—1597


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 3

Editor who approved publication: Prof. Dr. Chunxue Bai

Jui-O Chen,1,2,* Jui-Fang Liu,1,3–5,* Yu-qi Liu,6 Yu-Mu Chen,7 Mei-Lien Tu,4 Hong-Ren Yu,8 Meng-Chih Lin,3,7 Chiu-Chu Lin,2 Shih-Feng Liu3,7

1Department of Nursing, Tajen University, Pingtung, Taiwan; 2College of Nursing, Kaohsiung Medical University, Kaohsiung, Taiwan; 3Department of Respiratory Therapy, Kaohsiung Chang Gung Memorial Hospital-Kaohsiung Medical Center and Chang Gung University College of Medicine, Kaohsiung, Taiwan; 4Respiratory Care, Chang Gung University of Science and Technology, Taoyuan, Taiwan; 5Department of Education, National Kaohsiung Normal University, Kaohsiung, Taiwan; 6Department of Intensive Care unit, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, China; 7Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan; 8Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan

*These authors contributed equally to this work

Purpose: It is unclear whether the effectiveness of pulmonary rehabilitation program (PRP) after cardiac surgery differs between patients with and without COPD. This study aimed to compare the effectiveness of PRP between patients with and without COPD undergoing coronary artery bypass graft (CABG) surgery.
Patients and methods: We retrospectively included patients who underwent CABG surgery and received 3-week PRP from January 2009 to December 2013. We excluded patients who underwent emergency surgery, had an unstable hemodynamic status, were ventilator dependent or did not complete the PRP. Demographics, muscle strength, degree of dyspnea, pulmonary function and postoperative complications were compared.
Results: Seventy-eight patients were enrolled (COPD group, n=40; non-COPD group, n=38). Maximal inspiratory pressure (MIP; −34.52 cmH2O vs −43.25 cmH2O, P<0.01; −34.67 cmH2O vs −48.18 cmH2O, P<0.01), maximal expiratory pressure (MEP; 32.15 cmH2O vs 46.05 cmH2O, P<0.01; 37.78 cmH2O vs 45.72 cmH2O, P<0.01) and respiratory rate (RR; 20.65 breath/minute vs 17.02 breath/minute, P<0.01; 20.65 breath/minute vs 17.34 breath/minute, P<0.01) in COPD and non-COPD groups, respectively, showed significant improvement, but were not significantly different between the two groups. Forced vital capacity (FVC; 0.85 L vs 1.25 L, P<0.01), forced expiratory volume in 1 second (FEV1; 0.75 L vs 1.08 L, P<0.01), peak expiratory flow (PEF; 0.99 L vs 1.79 L, P<0.01) and forced expiratory flow between 25% and 75% of vital capacity (FEF25–75; 0.68 L vs 1.15 L, P<0.01) showed significant improvement between postoperative Days 1 and 14 in the COPD group. FVC (1.11 L vs 1.36 L, P<0.05), FEV1 (96 L vs 1.09 L, P<0.05) and FEF25–75 (1.03 L vs 1.26 L, P<0.05) were significantly improved in the non-COPD group. However, only PEF (80.8% vs 10.1%, P<0.01) and FEF25–75 (67.6% vs 22.3%, P<0.05) were more significantly improved in the COPD group than in the non-COPD group.
Conclusion: PRP significantly improved respiratory muscle strength and lung function in patients with and without COPD who underwent CABG surgery. However, PRP is more effective in improving PEF and FEF25–75 in COPD patients.

Keywords: COPD, coronary artery bypass graft, pulmonary rehabilitation program, pulmonary function, respiratory muscle strength, pulmonary complications

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