Carbon dioxide absorber canister with breathing gas moisture sump
First Claim
1. A canister for use with a patient breathing circuit in which expired breathing gases containing moisture are passed through the canister, said canister being removably insertable in the breathing circuit, said canister comprising:
- a container through which the breathing gases pass when the canister is inserted in the breathing circuit, said container containing carbon dioxide absorbing material for removing carbon dioxide from the breathing gases; and
a sump separate from said container but integrally formed in the canister with said container, said sump having an opening in fluid communication with the breathing gases for receiving and collecting moisture condensed out of the breathing gases passing through said container.
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Accused Products
Abstract
A moisture sump integrated into a carbon dioxide absorber canister provides a collection reservoir for condensate from a patient ventilator system when the carbon dioxide absorber canister is attached to the ventilator system. The volume of the moisture sump is appropriately sized so that the time interval required to collect a maximum amount of condensate interval is not more than the life expectancy of the carbon dioxide absorbing material contained within the canister. The moisture sump allows condensate management of difficult to drain areas such as the inlet to the expiratory check valve of a ventilator system. The removal of the carbon dioxide absorber canister by a patient attendee to replace the carbon dioxide absorbing material ensures that the condensate collected by the integral moisture sump is eliminated from the patient ventilator system.
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Citations
17 Claims
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1. A canister for use with a patient breathing circuit in which expired breathing gases containing moisture are passed through the canister, said canister being removably insertable in the breathing circuit, said canister comprising:
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a container through which the breathing gases pass when the canister is inserted in the breathing circuit, said container containing carbon dioxide absorbing material for removing carbon dioxide from the breathing gases; and
a sump separate from said container but integrally formed in the canister with said container, said sump having an opening in fluid communication with the breathing gases for receiving and collecting moisture condensed out of the breathing gases passing through said container. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
the breathing circuit has a first valve structure with a first valve outlet, wherein the container has an inlet port, the inlet port of the first container forming, when the container is in an attached position, a pneumatic seal with the first valve outlet for directing breathing gases through the container; and
wherein said breathing circuit has a second valve structure having an inlet, and wherein the container has an outlet port, said outlet port of the container, when the container is in an attached position, a pneumatic seal with the inlet of said second valve structure for discharging breathing gases from the container.
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16. A canister according to claim 1 wherein the sump has a reservoir chamber having a volume sized so that a maximum amount of condensate collected in a given time interval is no more than the life expectancy of the carbon dioxide absorbing material contained within the container.
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17. A canister for use with a patient breathing circuit in which expired breathing gases containing moisture are re-circulated, said breathing circuit having a valve for controlling the flow of gas in the breathing circuit, said canister being removably insertable in the breathing circuit so that the re-circulating breathing gases pass through the canister, said canister comprising:
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a sump removably attached to the valve upstream of its flow controlling elements, the sump having a reservoir chamber adapted to store a collected condensate; and
a container containing a carbon dioxide absorbing material, said re-circulating breathing gases passing through the container for removing CO2 from the breathing gases;
the hollow container and sump being integrally formed so as to form a canister removably attached to the valve.
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Specification