Functions of anesthesia reservoir bag in a breathing system
Abstract
This article addresses the different functions of anaesthesia reservoir bag in a circle anesthesia breathing system. A main purpose of the contribution was to explain complex interaction between the reservoir bag and fresh gas flow during mechanical ventilation. The anesthesia reservoir bag is a collapsible gas container which is an essential component of most anesthesia breathing system. The anesthesia reservoir bag permits manual ventilation and acts as a visual or tactile indicator of spontaneous breathing. The bag was excluded from traditional breathing system when the mechanical ventilator was in use. Discrepancies between the set and actual tidal volume can occur. However, on some anaesthesia workstation systems, such as the Dräger Primus, the reservoir bag is an integral part of the breathing system during mechanical ventilation, where it serves as a reservoir for oxygen and anaesthetic gases. In mechanically ventilated patients, gases enter the reservoir bag from the fresh gas flow during inspiratory phase, when the decoupling valve closes. The safe administration of general anaesthesia requires understanding of the technological advances in highly sophisticated anaesthetic equipment.
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