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[Technics for artificial ventilation of a single lung during thoracotomy]
Annales Francaises D'Anesthesie Et De Reanimation
|January 1, 1984
Summary
During thoracotomy, switching to single lung ventilation significantly drops arterial oxygen levels. Increasing the fraction of inspired oxygen is the only effective method to improve oxygenation in these patients.
Area of Science:
- Anesthesiology
- Cardiopulmonary Physiology
Context:
- Thoracotomy necessitates single lung ventilation, often leading to hypoxemia.
- Maintaining adequate arterial oxygen tension (PaO2) is critical during thoracic surgery.
Purpose:
- To evaluate various strategies for mitigating the decrease in PaO2 during one-lung ventilation (OLV).
- To identify the most effective method for improving oxygenation during OLV in patients undergoing thoracotomy.
Summary:
- Switching to OLV in the lateral decubitus position caused a significant drop in PaO2 (180 to 67 mmHg).
- Reducing tidal volume or applying positive end-expiratory pressure (PEEP) did not improve PaO2.
- Increasing the fraction of inspired oxygen (FiO2) from 0.5 to 0.7 effectively increased PaO2.
- Pulmonary artery clamping temporarily improved PaO2, while dual lung ventilation restored it to baseline.
Impact:
- Increasing FiO2 is the sole effective strategy to enhance oxygenation during OLV.
- Dual lung ventilation may be required if hypoxemia persists despite increased FiO2.
- Findings guide anesthetic management to optimize oxygenation during thoracotomy.