2023年1月29日 · Anesthesia breathing systems serve as a conduit to deliver patients anesthetic and fresh gases. There are various breathing systems, each with its own advantages and disadvantages.

Different breathing systems show varying efficiencies in spontaneously breathing and ventilated patients. Knowing the efficiencies of an individual breathing system enables the user to deliver fresh gas to a patient in a way that minimises rebreathing of carbon dioxide.

Bain coaxial modification: fresh gas tube inside breathing tube (to warm fresh gas). Most efficient for controlled ventilation. Exhalation tubing should provide a larger volume than tidal volume to prevent rebreathing. Scavenging is difficult. Decreased resistance in circuit conducive to weaning.

2019年8月12日 · Almost all anesthesia machines are equipped with some form of a circle breathing circuit with the ability for carbon dioxide absorption during low-flow anesthesia and elimination through the pop-off valve during high-flow anesthesia.

When used for spontaneous ventilation, a breathing circuit must enable a patient to breathe satisfactorily without significantly increasing the work of breathing or the physiological deadspace. It must also conduct inhalational anaesthetic agents to the patient.

Breathing circuits form the backbone of anaesthesia delivery systems, serving as the critical link between the anaesthesia machine and the patient. These assemblies are designed to safely and efficiently transport anaesthetic gases to the patient while removing carbon dioxide.

The anesthesia breathing system is a gas pathway that connects the patient’s airway to the anesthesia machine; it extends from the fresh gas inlet to the point where gas escapes, either into the atmosphere or into a scavenging system.

Breathing systems provide the final conduit for the delivery of anesthetic gases to the patient. Breathing circuits link a patient to an anesthesia machine (Figure 3–1). Many different circuit designs have been developed, each with varying degrees …

2024年2月5日 · Open-drop anesthesia is the simplest breathing circuit and is no longer in use. Gauze soaked in anesthetic liquid, historically ether or chloroform is placed over a patient’s face. Inhalation causes vaporization of the anesthetic as air moves through the gauze, delivering highly unpredictable levels of anesthetic to the patient. 2

2016年6月12日 · Breathing systems provide the final conduit for the delivery of anesthetic gases to the patient. Breathing circuits link a patient to an anesthesia machine (Figure 3-1). Many different circuit designs have been developed, each with varying degrees of efficiency, convenience, and complexity.