Limitations in exercise and functional capacity in long-term postpneumonectomy patients

Area of Science:

• Cardiopulmonary Exercise Physiology
• Thoracic Surgery Outcomes
• Rehabilitation Medicine

Background:

• Pneumonectomy significantly impacts pulmonary function and exercise tolerance.
• Long-term effects on exercise capacity and functional status post-pneumonectomy are not well-established.
• Identifying exercise-limiting factors, including comorbidities and the side of resection, is crucial.

Purpose of the Study:

• To evaluate long-term exercise tolerance and functional capacity in patients after pneumonectomy.
• To determine the primary factors limiting exercise performance.
• To assess the influence of lung resection side and comorbidities on exercise limitations.

Main Methods:

• Seventeen post-pneumonectomy patients underwent pulmonary function tests (PFTs), cardiopulmonary exercise testing (CPET), Doppler-echocardiography, 6-minute walk test (6MWT), and senior fitness tests (SFTs).
• Patients were assessed 5.5 years on average after surgery.
• Data on comorbidities and the side of lung resection were collected.

Main Results:

• Patients exhibited diminished exercise capacity (peak O2 uptake: 48% predicted) and PFTs (FVC: 55% predicted, FEV1: 46% predicted).
• Cardiovascular limitations were prevalent during CPET, with normal breathing reserve.
• Functional capacity (6MWT: 89% predicted) and SFTs were near normal; no significant differences were found based on lung resection side or comorbidities.

Conclusions:

• Long-term post-pneumonectomy patients experience reduced exercise capacity, primarily driven by cardiovascular factors, irrespective of resection side or comorbidities.
• Despite decreased exercise capacity, functional capacity for daily living activities is generally preserved.
• Meticulous long-term cardiopulmonary evaluation is recommended to maintain physiological reserves.