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US 2022/0176024 A1Published application
Oxygenator with pressure relief and sampling
AssigneeTerumo Kabushiki Kaisha
InventorTakashi Saito
Life of this patent
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Abstract
A cover member (36) that forms an end of a housing (26) of an oxygenator (10) has a recessed wall portion (88) recessed relative to a cover main body (74) further toward a side of a gas exchange unit (30) than an inner surface (74a). A pressure control hole (86) is formed through a main body (74) of the cover member (36), and a sampling port (90a) is disposed in the second recessed wall portion (88) to collect gas guided out from the gas exchange unit (30). The sampling port (90a) faces, at its inner opening portion (92), a second outlet side end face (31b) of the gas exchange unit (30).
Claims13
An oxygenator comprising:
- a gas exchange unit having hollow fiber membranes extending between first and second longitudinal ends and being configured to allow blood to undergo gas exchange, wherein the first longitudinal end comprises an inlet side end face thereof where gas inlets of the hollow fiber membranes are located, and wherein the second longitudinal end comprises an outlet side end face thereof where gas outlets of the hollow fiber membranes are located;
- and
- a housing provided with a gas inflow port and a gas outflow port, wherein the housing is comprised of:
- a housing main body with the gas exchange unit accommodated therein;
- a first cover member disposed on one end portion of the housing main body enclosing the first longitudinal end of the gas exchange unit;
- and
- a second cover member disposed on another end portion of the housing main body enclosing the second longitudinal end of the gas exchange unit;
- wherein the second cover member includes a cover main body facing the outlet side end face of the gas exchange unit, a recessed wall portion which is recessed relative to the cover main body to be closer to the outlet side end face of the gas exchange unit than an inner surface of the cover main body, a pressure control hole formed through the cover main body to control a pressure of gas guided out from the gas exchange unit, and a sampling port disposed in the recessed wall portion to collect a respective portion of the gas guided out from the gas exchange unit, wherein the sampling port faces, at an inner opening portion thereof, the outlet side end face of the gas exchange unit.
5 more elements
An oxygenator for treating an extracorporeal blood flow, comprising:
- a cylindrical housing with a first cover member at a first end defining a gas inlet and a second cover member at a second end defining a gas outlet and a sampling port;
- and
- a gas exchange unit comprised of cylindrically-wound hollow fiber membranes each extending from an annular inlet side end face proximate the first cover member to an annular outlet side end face proximate the second cover member;
- wherein the second cover member has a main wall portion spaced from the outlet side end face of the gas exchange unit by a first distance and a recessed wall portion spaced from the outlet side end face of the gas exchange unit by a second distance which is less than the first distance;
- wherein the main wall portion includes a pressure control hole configured to provide pressure relief within the housing;
- wherein the sampling port is disposed on the recessed wall portion so that a spacing of an inner end of the sampling port from the outlet side end face is less than a spacing of the pressure control hole from the outlet side end face, whereby a gas flowing from the gas exchange unit flows to the sampling port more efficiently than an ambient air flowing through the pressure control hole.
3 more elements
An oxygenator for treating an extracorporeal blood flow, comprising:
- a cylindrical housing with a first cover member at a first end defining a gas inlet and a second cover member at a second end defining a gas outlet and a sampling port;
- and
- a gas exchange unit comprised of cylindrically-wound hollow fiber membranes each extending from an annular inlet side end face proximate the first cover member to an annular outlet side end face proximate the second cover member;
- wherein the second cover member has a main wall portion spaced from the outlet side end face of the gas exchange unit by a first distance;
- wherein the main wall portion includes a pressure control hole configured to provide pressure relief within the housing;
- and
- wherein the sampling port is spaced by 60° or greater in a peripheral direction of the second cover member relative to the pressure control hole, whereby a gas flowing from the gas exchange unit flows to the sampling port more efficiently than an ambient air flowing through the pressure control hole.
4 more elements
Dependencies are inferred from the claim text.