A ventilator includes a ventilation drive configured to drive ventilation gas from a gas source to a patient and a patient interface section configured to guide inspiratory gas from the ventilation drive to a patient connection, receive expiratory gas from the patient connection, and expel the expiratory gas out of the ventilator. The ventilation drive and patient interface section are configured to removably connect to at least one host comprising a ventilation path portion so as to divert the inspiratory gas through the ventilation path portion of the host when connected thereto.

A fluid delivery system provides fluid, such as supplement oxygen, to a patient in response to inhalation. The fluid delivery system includes a valve assembly that is triggered by sensing onset of inspiration by measuring a change in temperature of air flow in a nasal or oral cannula, mask or helmet.

A gas analyzer for measuring a respiratory gas component includes an emitter that transmits infrared (IR) radiation through a measurement chamber containing respiration gas, and at least one IR detector configured to receive at least a portion of the IR radiation transmitted through the measurement chamber and to generate radiation measurement data based on the received IR radiation. A light source is configured to emit light onto a color indicator, wherein the color indicator is one of a predefined set of colors. A color detector is configured to detect light reflected by a color indicator so as to identify color information. The controllers configured to determine a respiratory gas component concentration within the measurement chamber based on the color information and the radiation measurement data.

A lung simulator for partial simulation of functions of a lung, comprising at least one gas loop which is connected to a ventilator which is configured to convey a breathing gas into and/or out of the gas loop at least temporarily. The lung simulator comprises at least one device for setting the O2 concentration of the breathing gas in the gas loop, at least one device for setting the CO2 concentration of the breathing gas in the gas loop and at least one device for simulating a mechanical lung movement.

Disclosed is an anesthetic gas distribution device capable of being easily adjusted to conform to various conditions of a sample. An anesthetic gas distribution device according to an embodiment of the present invention includes a manifold block including a main block and one or more sub-blocks coupled to one side or two opposite sides of the main block so as to be separable in a first direction, the manifold block being configured to be supplied with the gas from the outside, and supply nozzles connected to the manifold block in a second direction perpendicular to the first direction and configured to supply the gas to the sample.

The present disclosure generally relates to systems and methods for delivery of therapeutic gas to patients, using techniques to compensate for disruptions in breathing gas flow measurement, such as when breathing gas flow measurement is unavailable or unreliable. Such techniques include using historical breathing gas flow rate data, such as moving average flow rates, moving median flow rates and/or flow waveforms. At least some of these techniques can be used to ensure that interruption in therapeutic gas delivery is minimized or eliminated.

Inhalation of low levels of nitric oxide can rapidly and safely decrease pulmonary hypertension in mammals. A nitric oxide delivery system that converts nitrogen dioxide to nitric oxide employs a surface-active material, such as silica gel, coated with an aqueous solution of antioxidant, such as ascorbic acid.

The present disclosure generally relates to systems and methods for delivery of therapeutic gas to patients, using techniques to compensate for disruptions in breathing gas flow measurement, such as when breathing gas flow measurement is unavailable or unreliable. Such techniques include using historical breathing gas flow rate data, such as moving average flow rates, moving median flow rates and/or flow waveforms. At least some of these techniques can be used to ensure that interruption in therapeutic gas delivery is minimized or eliminated.

An anesthesia machine includes a gas mixer providing gas for delivery to a ventilated patient and a breathing system. The breathing system includes a reusable ventilation portion and a disposable circle portion. The reusable ventilation portion includes a mechanical ventilation section, a manual ventilation section, a ventilation port, and switch configured to switch between connection of the mechanical ventilation section and the manual ventilation section to drive patient ventilation. The disposable circle portion includes a vent connector that connects to the ventilation port, an inspiratory channel, and a gas intake port providing anesthetic gas from the gas mixer to the inspiratory channel. The disposable circle portion further includes an expiratory channel, a CO.sub.2 absorber, and a filter positioned in a flow path between the expiratory port and the vent connector and between the CO.sub.2 absorber and the vent connector. The filter is configured to prevent moisture and bacteria from entering the reusable ventilation portion of the breathing system.

The present invention provides clinical decision support that can be used with non-portable and portable systems when delivering and/or monitoring delivery of a therapeutic gas comprising nitric oxide to a patient. Further, clinical decision support can be used with non-portable and portable systems during delivery and/or monitoring of delivery of therapeutic gas when nebulized drugs may and/or may not be being delivered to a patient (e.g., when nebulizers are delivered upstream in the inspiratory limb of the breathing circuit, into a breathing gas delivery system, etc.).