Abstract: Objective To observe the efficacy of early pulmonary rehabilitation training on respiratory function of patients with hypoxemia after coronary artery bypass grafting. Methods From February, 2013 to September, 2016, 53 patients with hypoxemia after coronary artery bypass grafting were randomly divided into control group (n=25) and observation group (n=28). Both of them received routine therapy, while the observation group received pulmonary rehabilitation training in addition. Results Three days after extubation, the forced expiratory volume in one second (FEV₁) (measured) and FEV₁/ forced vital capacity (FVC) were higher in the observation group than in the control group (t>3.590, P<0.01), while the level of PaO₂ was higher (t=5.824, P<0.001); the FEV₁ (measured), FEV₁(measured/ predicted) and FEV₁/FVC decreased in both groups (F>1.044, P<0.05). The hospital stay was shorter (t=-2.138, P=0.037). The level of PaO₂ was the highest one day after extubation among three time points in both groups (P<0.001). No significantly difference was observed in mechanical ventilation time and ICU stay between two groups (P>0.05). Conclusion Early respiratory exerciser training could improve the respiratory function of patients with hypoxemia after coronary artery bypass grafting, shorten hospital stay.

Key words: coronary artery bypass graft, hypoxemia, respiratory exerciser, pulmonary rehabilitation