Exhalation valve arrangement for ventilator apparatus with apparatus for receiving pressure sensor

Abstract

An exhalation valve device (22) for a ventilator apparatus for the artificial respiration of patients can be flowed through in an exhalation flow direction (E) and comprises: an upstream breathing gasduct (54), which extends along a first duct path (K1) and is or can be connected to a section of the exhalation line coming from the patient, a downstream breathing gas duct (58), which extends alonga second duct path (K2) and is or can be connected to a breathing gas sink (U), a valve assembly (63) having a valve body (64) and a valve seat (66), which valve assembly is provided between the upstream and the downstream breathing gas ducts (54, 58) such that, in the event of a predetermined first breathing gas overpressure in the upstream gas duct (54) relative to the downstream gas duct (58),the valve assembly permits an exhalatory breathing gas flow from the upstream breathing gas duct (54) to the downstream breathing gas duct (58) and, in the event of a predetermined second breathing gas overpressure in the downstream breathing gas duct (58) relative to the upstream breathing gas duct (54), the valve assembly blocks a gas flow from the downstream breathing gas duct (58) to the upstream breathing gas duct (54). According to the invention, the exhalation valve arrangement (22) has a bypass chamber (74) that communicates via flow mechanics with the upstream breathing gas duct (54)and extends from the upstream breathing gas duct (54) to the region of the downstream breathing gas duct (58) and there is designed for coupling a gas pressure sensor (80).

Description

technical field [0001] The invention relates to an exhalation valve device of an exhalation circuit of a breathing apparatus for performing artificial respiration on a patient, wherein the exhalation valve device is permeable along the exhalation flow direction and comprises: [0002] - an upstream breathing gas channel which extends along the first channel path and which is or can be connected to the section of the expiratory line which originates from the patient, [0003] - a downstream breathing gas channel which extends along the second channel path and which is connected or connectable to a breathing gas outlet, for example the external environment, [0004] - a valve assembly having a valve body and a valve seat, the valve assembly being arranged between the upstream breathing gas passage and the downstream breathing gas passage such that the valve assembly is relatively opposite to the downstream breathing gas in the upstream expiratory gas passage a flow of exhaled b...

AI Technical Summary

Problems solved by technology

However, structural errors between the measuring point of the breathing gas pressure at the proximal end of the exhalation line and the measuring point close in the valve assembly, but located upstream thereof, affect the feasibility, e.g. The elasticity of the expiratory hose of the expiratory line of the gas valve arrangement causes the pressure measurement at the proximal end of the expiratory line to be relevant for the expiratory line actually present in the upstream respiratory gas channel upstream of the valve assembly. The breathing gas pressure in the distal region of the

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