Filter assembly for a therapeutic gas delivery device
AssigneeMallinckrodt Pharmaceuticals Ireland Limited
InventorsAndrew Meyer, John Stanton, Daniel Cody
Life of this patent
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Abstract
Disclosed herein is a sample gas filter assembly for a therapeutic gas delivery device. The sample gas filter assembly can have a filter apparatus, a water-permeable tubular membrane, and a ventilated cap. The sample gas filter assembly may be configured for maintaining a condensate pH from an assembly for humidity conditioning and filtering a sample gas in a therapeutic gas delivery device.
Claims20
A filter assembly for a therapeutic gas delivery device, the assembly comprising:
- a filter apparatus comprising an inlet, an outlet, and at least one reservoir and at least one filter membrane between the inlet and the outlet, wherein the filter apparatus is operable to remove water vapor from a sample gas and collect a condensate in the at least one reservoir;
- a water-permeable tubular membrane fluidly connected to the outlet of the filter apparatus, and
- a ventilated cap connected to the filter apparatus and surrounding the outlet, the ventilated cap comprising a ventilation aperture.
A method for humidity conditioning and filtering a sample gas in a therapeutic gas delivery device, the method comprising:
- passing the sample gas through a filter apparatus of an assembly;
- collecting a condensate from the sample gas in the filter apparatus;
- and
- passing a filtered sample gas through a water-permeable tubular membrane of the assembly, wherein the sample gas leaving the water-permeable tubular membrane is a humidity conditioned sample gas.
A method for preventing degradation or corrosion in a therapeutic gas delivery device, the method comprising:
- passing a sample gas through a filter apparatus of an assembly;
- collecting a condensate from the sample gas in the filter apparatus;
- passing a filtered sample gas through a water-permeable tubular membrane of the assembly, wherein the sample gas leaving the water-permeable tubular membrane is a humidity conditioned sample gas, and
- preventing the sample gas from contacting a sensor without first being humidity conditioned and/or maintaining the condensate at a pH of about 5.0 to about 6.0.
Dependencies are inferred from the claim text.