EP0205072A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Heat and moisture exchanging apparatus
Assignee: Terumo Corp
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Filing: 1986-06-03
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Granted: —
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Expires: 2006-06-03
Abstract
Abstract A respiratory heat and moisture exchanging apparatus comprising a housing is connected at one port to an endotracheal or tracheotomy tube and at another port to a respiratory gas delivery tube. A heat and moisture accumulator in the form of an alternate parallel stack of corrugated paper sheets and flat paper sheets is disposed in the housing so that respiratory gas is passed through the gaps between the corrugated sheets and the flat sheets. At least the corrugated sheets contain a hygroscopic material. During anesthesia and respiration process, the apparatus supplies sufficient heat and moisture to inspiring gas with a less and uniform pressure drop over the entire gas passage area.
Inventors
- 👤 Masahiro Nudeshima
- 👤 Yasushi Ohshima
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 10:54
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/10; A61M16/1045
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
94 words
A heat and moisture exchanging apparatus comprising a housing having a port to be connected to a device such as an endotracheal or tracheotomy tube on one side thereof and another port to be connected to a gas delivery means on another side whereby the gas is passed through the housing between the ports, characterized in that a heat and moisture accumulator comprising an alternate parallel stack of corrugated sheets and flat sheets is disposed in said housing wherein the gas is passed through the gaps between the corrugated sheets and the flat sheets.
Claim 2
Dependent Claim
94 words
A heat and moisture exchanging apparatus comprising a housing having a port to be connected to a device such as an endotracheal or tracheotomy tube on one side thereof and another port to be connected to a gas delivery means on another side whereby the gas is passed through the housing between the ports, characterized in that a heat and moisture accumulator comprising an alternate parallel stack of corrugated sheets and flat sheets is disposed in said housing wherein the gas is passed through the gaps between the corrugated sheets and the flat sheets.
Claim 3
Dependent Claim
48 words
A heat and moisture exchanging apparatus according to claim 1 wherein each said corrugated sheet consists of a thin paper sheet of 0.01 to 0.30 mm thick, the sheet being corrugated to form ridges of 0.5 to 3.0 mm high at a pitch of 0.5 to 5.0 mm.
Claim 4
Dependent Claim
28 words
A heat and moisture exchanging apparatus according to claim 1 wherein at least the corrugated sheets of said heat and moisture accumulator have a hygroscopic material applied thereto.
Claim 5
Dependent Claim
39 words
A heat and moisture exchanging apparatus according to claim 3 wherein said hygroscopic material is at least one member selected from the group consisting of glycerol, polyvinyl pyrrolidone, polyacrylic acid, polyacrylates, polyvinyl alcohol, glycols, calcium chloride, and lithium chloride.
Claim 6
Dependent Claim
30 words
A heat and moisture exchanging apparatus according to claim 3 or 4 wherein said hygroscopic material is contained in an amount of 5 to 50% by weight of the sheets.
Claim 7
Dependent Claim
31 words
A heat and moisture exchanging apparatus according to claim 1 wherein both the corrugated sheets and the flat sheets of said heat and moisture accumulator have a hygroscopic material applied thereto.
Claim 8
Dependent Claim
39 words
A heat and moisture exchanging apparatus according to claim 6 wherein said hygroscopic material is at least one member selected from the group consisting of glycerol, polyvinyl pyrrolidone, polyacrylic acid, polyacrylates, polyvinyl alcohol, glycols, calcium chloride, and lithium chloride.
Claim 9
Dependent Claim
30 words
A heat and moisture exchanging apparatus according to claim 6 or 7 wherein said hygroscopic material is contained in an amount of 5 to 50% by weight of the sheets.
References Cited (Backward Citations)
No citation records indexed.
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