Moisture permeable conduit for a breathing circuit
AssigneePlastiflex Group
InventorsDiane Gibson, Jeno Kurja
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Abstract
There is provided a flexible, helically wound conduit for a breathing circuit comprising an inlet 1, an outlet 3, and an enclosing wall 2 defining a flow passage between said inlet and said outlet, wherein at least a region of said enclosing wall is permeable to water vapor and one or more of O2 and CO2, and wherein the axial tensile strength of the enclosing wall is greater than 40N. Further provided are limbs comprising the conduit, a method of manufacturing the conduit and the use of the conduit to remove water vapor and/or CO2 from gas exhaled by a patient.
Claims21
A flexible, helically wound conduit for a breathing circuit comprising
- an inlet,
- an outlet, and
- an enclosing wall defining a flow passage between said inlet and said outlet,
- wherein said enclosing wall comprises a first helical web and a first helically wound rib,
- wherein the rib is heat-bonded to adjacent turns of said first helical web, and
- wherein at least a region of said enclosing wall is permeable to water vapor and one or more of O2 and CO2, and
- wherein the axial tensile strength of the enclosing wall is greater than 40N.
(canceled)
A method of circulating breathing gases of a patient comprising:
- providing a limb according to claim, wherein the first connector is connected to a patient interface and the second connector is connected to a closed-system breathing apparatus comprising a CO2 scrubber;
- circulating breathing gases through the closed-system breathing apparatus;
- and
- transmitting at least some CO2 from said breathing gases through the enclosing wall of said conduit.
Dependencies are inferred from the claim text.