Surgery – Respiratory method or device – Means for indicating improper condition of apparatus
Patent
1997-09-30
2000-03-14
Weiss, John G.
Surgery
Respiratory method or device
Means for indicating improper condition of apparatus
12820512, 12820527, 12820523, A61M 1600
Patent
active
060358513
ABSTRACT:
A method and device for monitoring the condition of at least one filter arranged in a flow path of a ventilator. Flow measurement signals are obtained from a first flow meter and a second flow meter and pressure signals are obtained from a first pressure meter and a second pressure meter. When a filter in the inspiratory section of the ventilator is to be tested, flow through the filter and the drop in pressure across the filter are determined from the pressure measured by the first pressure meter and the second pressure meter. If the drop in pressure in relation to the flow lies within predefined limits, the filter is deemed to be serviceable. In a corresponding manner, another filter in the expiratory line can be tested, wherein flow through the filter is determined by the second flow meter.
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Siemens-Elema AB
Srivastava V.
Weiss John G.
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