Postoperative physical therapy after coronary artery bypass surgery

Area of Science:

• Cardiothoracic Surgery
• Pulmonary Rehabilitation
• Critical Care Medicine

Background:

• Postoperative atelectasis is a common complication following coronary artery bypass surgery.
• The effectiveness of specific chest physical therapies for managing atelectasis remains unclear.
• Early identification of atelectasis severity is crucial for guiding treatment.

Purpose of the Study:

• To evaluate the efficacy of different chest physical therapies in managing postoperative atelectasis after coronary artery bypass surgery.
• To determine if the degree of atelectasis at extubation predicts pneumonia risk.
• To compare the impact of early mobilization, sustained maximal inflations (SMI), and single-handed percussions (SSP) on clinical outcomes and hospital stay.

Main Methods:

• A randomized controlled trial involving 228 patients undergoing elective coronary artery bypass surgery.
• Patients were stratified by the degree of atelectasis at extubation (greater or lesser).
• Interventions included early mobilization, SMI, and SSP, with patient groups randomized to specific therapies based on atelectasis severity.

Main Results:

• The extent of atelectasis at extubation did not correlate with the risk of developing pneumonia.
• Hospital and intensive care unit (ICU) stays were comparable across all treatment groups.
• Single-handed percussions (SSP) incurred the highest physical therapy costs due to its labor-intensive nature.

Conclusions:

• Postoperative respiratory dysfunction after coronary artery bypass surgery is frequent but rarely leads to significant morbidity or prolonged hospitalization.
• Adding SMI to early mobilization for patients with minimal atelectasis does not improve outcomes.
• For patients with marked atelectasis, SSP does not offer superior outcomes compared to SMI and early ambulation.