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Poor ventilatory efficiency during exercise may predict prolonged air leak after pulmonary lobectomy
Kristian Brat1,2, Milos Chobola2,3, Pavel Homolka2,4
1Department of Respiratory Diseases, University Hospital Brno, Brno, Czech Republic.
Interactive Cardiovascular and Thoracic Surgery
|October 21, 2019
Summary
Poor ventilatory efficiency during exercise, indicated by a high VE/VCO2 slope, and pleural adhesions are linked to prolonged air leak after lung surgery. Identifying these risk factors can help predict complications.
Area of Science:
- Pulmonary Medicine
- Thoracic Surgery
- Exercise Physiology
Background:
- Poor ventilatory efficiency (VE/VCO2 slope) may contribute to prolonged air leak (PAL) after lung resection, potentially due to dynamic hyperinflation.
- Identifying preoperative predictors of PAL is crucial for patient management and outcomes.
Purpose of the Study:
- To investigate the association between preoperative ventilatory efficiency (VE/VCO2 slope) and the development of prolonged air leak (PAL) after lung lobectomy.
- To identify independent predictors of PAL in patients undergoing lung lobectomy.
Main Methods:
- Prospective, two-centre study of 96 lung lobectomy candidates.
- Preoperative pulmonary function tests and cardiopulmonary exercise testing.
- PAL defined as air leak on chest tube on postoperative day 5.
Main Results:
- 28% of patients developed PAL.
- PAL was associated with more frequent pleural adhesions (50% vs 21%) and a steeper VE/VCO2 slope (35±7 vs 30±5).
- Pleural adhesions (OR 3.9) and VE/VCO2 slope (OR 1.1) were independent predictors of PAL.
Conclusions:
- A high VE/VCO2 slope during exercise is independently associated with an increased risk of prolonged air leak after lung lobectomy.
- Preoperative assessment of VE/VCO2 slope may aid in identifying patients at higher risk for PAL.
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