Comparative Effects of Incentive Spirometer versus Inspiratory Muscle Trainer on Diaphragmatic Excursion Post-Coronary Artery Bypass Graft Surgery

Document Type : Original Article

Authors

1 Physical therapist/ National heart Institute Egypt

2 Prof. of physical therapy /faculty of physical therapy /Cairo University

3 Assist. Prof of physical therapy /faculty of physical therapy /Cairo University

4 Assist. Prof. Of Radiology/General Organization for Teaching hospitals and institutes

10.21608/iptccu.2025.443807

Abstract

Aims: This study aimed to compare the effectiveness of Incentive Spirometry (IS)   and Inspiratory Muscle Training (IMT) on diaphragmatic excursion in patients undergone coronary artery bypass graft (CABG) surgery.
Methods: Fifty-two patients scheduled for elective CABG were randomized into two groups. Group A received conventional physiotherapy with IS, while Group B underwent physiotherapy with IMT. Diaphragmatic excursion was assessed pre- and post-intervention using ultrasound imaging.
Results: Both groups showed significant improvement in diaphragmatic excursion (IS: 3.6 ± 0.5 cm to 4.8 ± 0.9 cm, IMT: 3.7 ± 0.7 cm to 5.05 ± 0.7 cm; p < 0.001 within groups). No statistically significant difference was found between the groups post-treatment (p = 0.31).
Conclusion: Both IS and IMT significantly improve diaphragmatic excursion following CABG surgery. Either modality can be effectively implemented based on clinical and logistical considerations.

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