Physiological effects of respiratory failure after paediatric surgery

Area of Science:

• Pulmonary Medicine
• Medical Engineering
• Pediatric Critical Care

Background:

• Artificial ventilation presents challenges in certain pathological conditions.
• Accurate assessment of lung volume is crucial for effective respiratory support.
• Post-cardiac surgery patients often exhibit low pulmonary compliance, complicating ventilation.

Purpose of the Study:

• To describe a simple whole-body plethysmography method for investigating lung volumes.
• To evaluate the efficacy of Continuous Positive Airway Pressure (CPAP) in improving respiratory parameters.
• To explore the relationship between pulmonary volume and hypoxia during mechanical ventilation.

Main Methods:

• Utilized a modified Drinker's respirator as a whole-body plethysmograph to measure lung volumes.
• Applied CPAP therapy in pediatric patients following cardiosurgical operations.
• Monitored arterial blood oxygenation and assessed respiratory work clinically.

Main Results:

• The plethysmography method provided a means to investigate lung volumes.
• CPAP significantly improved arterial blood oxygenation in patients with low pulmonary compliance.
• Clinically observed reduction in respiratory work was noted with the CPAP intervention.
• Hypoxia during high-oxygen mixture ventilation may be linked to decreased pulmonary volume.

Conclusions:

• Whole-body plethysmography offers a practical approach to assess lung volume, particularly in challenging ventilation scenarios.
• CPAP is a valuable tool for enhancing oxygenation and easing respiratory burden in pediatric cardiac surgery patients with compromised lung compliance.
• Addressing decreased pulmonary volume is a key therapeutic goal to mitigate hypoxia during mechanical ventilation.