Cardiothoracic & vascular anesthesia
Impact of Chest Wall on Respiratory Mechanics, Ventilation and Ventilation–Perfusion Matching During Cardiac Surgery
Authors' conclusion
Reestablishing chest wall integrity significantly deteriorates respiratory mechanics and ventilation homogeneity, mirroring improvements initially gained from sternotomy.
Study context
- Population
- Patients undergoing elective cardiac surgery with cardiopulmonary bypass (CPB), university hospital
- Participants
- 53 patients
- Exposure
- Respiratory mechanics, ventilation and V/Q matching across 4 surgical stages: before sternotomy, after sternotomy, after weaning from CPB, after sternal closure
- Outcome
- Respiratory mechanics and ventilation heterogeneity across stages
Methodological detailsconsecutive, single-centre
- Consecutive
- Single-centre
Main finding
As reported in the abstract
- Sternotomy improved airway resistance
- −30%
- Sternotomy improved tissue damping
- −25%
- Sternotomy improved elastance
- −35%
- Sternotomy reduced phase 3 capnographic slope (p < 0.001)
- 20%
- CPB increased airway resistance (p < 0.001)
- +45%
- CPB increased elastance (p < 0.001)
- +50%
Observational data: associations, not effects.
Further findings
- No additional significant impact of sternal closure on V/Q matching or oxygenation; PaO2/FiO2 unchanged after closure
Original publication
Impact of Chest Wall on Respiratory Mechanics, Ventilation and Ventilation–Perfusion Matching During Cardiac Surgery. J Cardiothorac Vasc Anesth. Published 21 August 2025. doi:10.
Composed by AI from the published abstract and checked against it. How Briefs are made →