Controllable partial rebreathing anesthesia circuit and respiratory assist device

摘要

An apparatus for resuscitating, administering anesthesia to, or administering respiratory care to a patient is shown which allows greater rebreathing of mixed expired gases thus improving humidification and heat retention in the inspired gases. The inhalation breathing circuit may include two concentric, non-kinking, corrugated tubes, one visually apparent within the other, for handling both fresh gases and mixed expired gases of the patient or the inhalation breathing circuit may consist of a spiralled inflow tube contained within the wall of the larger exhalation corregated tube. An adjustable exhaust pressure valve maintains a predetermined pressure range for the gas being delivered to- and-fro between a breathing bag and the patient. Expired gases vent through an anesthesia bacterial filter or may be scavenged to prevent environmental pollution. Suctioning of the patient may be performed without interrupting the fresh gas flow or ventilation to the patient.