Maquet Critical Care Ab

Mikael Kock

Christer Ahlmén

Mario Loncar

Pär Emtell

Petter Videbrink

Kin-Chun Wong

A gas regulating device for use in calibration of a gas analyzer has an inlet and an outlet, a valve arrangement comprising at least one valve, and valve regulator for regulating the at least one valve. The gas regulating device is intended to be connected between a calibration gas supply and a gas analyzer that is to be calibrated and the valve regulator is configured to regulate the at least one valve such that gas is allowed to flow through a gas flow path between the inlet and outlet only when a gas pressure in the gas flow path, between the at least one valve and the outlet, falls below a predetermined threshold value. The gas regulating device is used when calibrating side-stream gas analyzers in which case it reduces calibration gas consumption, prevents discharge of calibration gas into the ambient environment and prevents leakages jeopardizing correct calibration.

On-demand gas regulator for gas analyzer calibration

A breathing apparatus for ventilating the lungs of a patient with breathing gas, has: a breathing circuit configuration; a mechanical ventilation system; a manual ventilation system provided with a manual ventilation bag; a manual ventilation valve for enabling manual ventilation of breathing gas from the breathing circuit; a pressure sensor devised to detect the pressure level in the breathing circuit; an electronically controlled expiration valve () that in a mechanical ventilation mode is controlled to control the pressure level in the breathing circuit according to a first set of predetermined control rules adapted to mechanical ventilation mode requirements; said electronically controlled expiration valve in a manual ventilation mode being coupled to enable ventilation of breathing gas from the breathing circuit by means of the manual ventilation system according to a second set of predetermined control rules adapted to manual ventilation mode requirements. In a method for controlling a breathing apparatus, an electronic expiration valve is controlled during the mechanical ventilation mode as well as during the manual ventilation mode of the apparatus. The control of the expiration valve can be implemented by means of a software product for the breathing apparatus embodying programming instructions as control rules, which, when executed in the apparatus, enable control of the expiration valve during manual ventilation.

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Åkersberga, Sweden

Mikael Kock