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[Pulsed Brain-Spoerel system a new closed-circle system (author's transl)]
Anesthesie, Analgesie, Reanimation
|January 1, 1981
Summary
This study introduces a modified anesthesia circuit that reuses expiratory gas, reducing fresh gas flow to the patient's oxygen consumption (VO2). This innovative technique offers advantages for head surgery, pediatric anesthesia, and environmental impact.
Area of Science:
- Anesthesiology
- Respiratory Physiology
- Medical Engineering
Context:
- The Bain circuit is commonly used in anesthesia.
- Spontaneous ventilation in patients can lead to increased work of breathing.
- Efficient carbon dioxide absorption is crucial in anesthesia circuits.
Purpose:
- To describe a modified anesthesia circuit that reinserts expiratory gas into the breathing circuit.
- To evaluate the feasibility and benefits of this modified system for patient anesthesia.
Summary:
- A pump reinserts expiratory gas into a Bain circuit at 14 L.min-1 after passing through a CO2 absorber.
- Fresh gas flow is reduced to match the patient's oxygen consumption (VO2).
- This system combines closed-system benefits with the Bain circuit's advantages, including reduced work of breathing and suitability for pediatric patients.
Impact:
- The technique offers practical advantages for head surgery, reduced energetic loss for spontaneously ventilating patients, and is adapted for pediatric use due to small dead space.
- Potential benefits include drug economy, reduced pollution, and improved humidification and warming of inspired gases.
- Successfully used in 100 head surgery patients without complications.