Expiratory limit for a breathing circuit

A breathing circuit limb having both inspiratory and expiratory gages passageways, each having a respective inlet and outlet and a wall defining a gases passageway extending from said inlet to said outlet, at least a region of the wall of the expiratory conduit being of a material that allows the passage of water vapour without allowing the passage of liquid water or respiratory gases, and

• wherein one said gases passageway is defined by an inner conduit, said inner conduit is disposed substantially coaxially within an external surrounding conduit, and the other of said gases passageways is defined between the inner and outer conduits, and
• wherein said conduit includes at least one helically wound polymer tape or strip, part or all of said strip being of a material that allows the passage of water vapour without allowing the passage of liquid water or respiratory gases, respective edges of adjacent turns of said strip being adjoining or overlapping and bonded, and
• said conduit includes lateral reinforcement against crushing and said lateral reinforcement is a helical bead disposed over said adjoining or overlapping edges between turns of strip, and
• said conduit includes longitudinal reinforcement against longitudinal stretching of said conduit.

A breathing circuit component including an inlet, an outlet and an enclosing wall defining a gases passageway between said inlet and said outlet, at least a region of said hall being of a material that allows the passage of water vapour without allowing the passage of liquid water or respiratory gases, and

• wherein said gases passageway is an expiratory conduit and said region or regions is or are distributed over the length of said conduit, and
• wherein said conduit including said regions is extruded, and
• wherein said regions of a material that allows the passage of water vapour without allowing the passage of liquid water or respiratory gases are one or more longitudinal strips running the complete length of said conduit, and
• said conduit includes lateral enforcement against crushing, and
• said lateral reinforcement is helical bead or a series of annular ring beads or ribs distributed over the length of said conduit, and
• said conduit includes a further wall of a material that allows the passage of water vapour without allowing the passage of liquid water or respiratory gases, and
• said further wall is spaced from said enclosing wall by at least said helical bead.

A breathing circuit limb having both inspiratory and expiratory gases passageways, each having a respective inlet and outlet and a first wall defining a gasses passageway extending from said inlet to said outlet, at least a region of said first wall of the expiratory conduit being of a material that allows the passage of water vapour without allowing the passage of liquid water or respiratory gases, and

• wherein one said eases passageway is defined by an inner conduit, said inner conduit is disposed substantially coaxially within an external surrounding conduit, and the other of said eases passageways is defined between the inner and outer conduits, and
• wherein said conduit including said regions is extruded, and
• wherein said regions of a material that allows the passage of water vapour without allowing the massage of liquid water or respiratory gases are one or more longitudinal strips running the complete length of said conduit, and
• said conduit includes lateral reinforcement against crushing, and
• wherein said lateral reinforcement is a helical bead or a series of annular ring beads or ribs distributed over the length of said conduit, and
• said conduit includes a further wall of a material that allows the passage of water vapour without allowing the passage of liquid water or respiratory gases, and
• said further wall is spaced from said first wall by at least said helical bead.

A breathing circuit component including an inlet, an outlet and an enclosing wall defining a gases passageway between said inlet and said outlet, at least a region of said wall being of a material that allows the passage of water vapour without allowing the passage of liquid water or respiratory gases, and

• wherein said gases passageway is an expiratory conduit and said region or regions is or are distributed over the length of said conduit, and
• said conduit includes at least one helically wound polymer tape or strip, part or all of said strip being of a material that allows the passage of water vapour without allowing the passage of liquid water or respiratory gases, respective edges of adjacent turns of said strip being adjoining or overlapping and bonded, and
• said conduit includes lateral reinforcement against crushing, and
• wherein said lateral reinforcement is a helical bead or a series of annular ring beads or ribs distributed over the length of said conduit, and
• said conduit includes a further wall of a material that allows the passage of water vapour without allowing the passage of liquid water or respiratory gases, and
• said further wall is spaced from said enclosing wall by at least said helical bead.

A breathing circuit component including an inlet, an outlet and an enclosing wall defining a gases passageway between said inlet and said outlet, at least a region of said wall being of a material that allows the passage of water vapour without allowing the passage of liquid water or respiratory gases, and

• wherein said gases passageway is an expiratory conduit and said region or regions is or are distributed over the length of said conduit, and
• wherein said conduit includes at least one longitudinal strip, part or all of said strip being of a material that allows the passage of water vapour without allowing the passage of liquid water or respiratory gases, said strip or strips extending parallel to the axis of said conduit, edges of said strip or strips adjoining or overlapping to form an enclosed tube and bonded, and
• said conduit includes lateral enforcement against crushing, and
• wherein said lateral reinforcement is a helical bead or a series of annular ring beads or ribs distributed over the length of said conduit, and
• said conduit includes a further wall of a material that allows the passage of water vapour without allowing the passage of liquid water or respiratory gases, and
• said further wall is spaced from said enclosing wall by at least said helical bead.

A breathing circuit component including an inlet, an outlet and an enclosing wall defining a gases passageway between said inlet and said outlet, at least a region of said wall being of a material that allows the passage of water vapour without allowing the passage of liquid water or respiratory gases, and

• wherein said gases passageway is an expiratory conduit and said region or regions is or are distributed over the length of said conduit, and
• wherein said conduit is a blown film tube of a material that allows the passage of water vapour without allowing the passage of liquid water or respiratory gases, and
• said conduit includes lateral reinforcement against crushing, and
• wherein said lateral reinforcement is a helical bead or a series of annular ring beads or ribs distributed over the length of said conduit, and
• said conduit includes a further wall of a material that allows the passage of water vapour without allowing the passage of liquid water or respiratory gases, and
• said further wall is spaced from said enclosing wall by at least said helical bead.

A breathing circuit limb having both inspiratory and expiratory gases passageways, each having a respective inlet and outlet and a first wall defining a gases passageway extending from said inlet to said outlet, at least a region of the wall of the expiratory conduit being of a material that allows the passage of water vapour without allowing the passage of liquid water or respiratory gases, and

• wherein one said gases passageway is defined by an inner conduit, said inner conduit is disposed substantially coaxially within an external surrounding conduit, and the other of said gases passageways is defined between the inner and outer conduits, and
• wherein said conduit includes at least one helically wound polymer tape or strip, part or all of said strip being of a material that allows the passage of water vapour without allowing the passage of liquid water or respiratory gases, respective edges of adjacent turns of said strip being adjoining or overlapping and bonded, and
• said conduit includes lateral reinforcement against crushing, and
• wherein said lateral reinforcement is a helical bead or a series of annular ring beads or ribs distributed over the length of said conduit, and
• said conduit includes a further wall of a material that allows the passage of water vapour without allowing the passage of liquid water or respiratory gases, and
• said further wall is spaced from said first wall by at least said helical bead.

A breathing circuit limb having both inspiratory and expiratory gases passageways, each having a respective inlet and outlet and a first wall defining gases passageway extending from said inlet to said outlet, at least a region of the wall of the expiratory conduit being of a material that allows the passage of water vapour without allowing the passage of liquid water or respiratory gases, and

• wherein one said gases passageway is defined by an inner conduit, said inner conduit is disposed substantially coaxially within an external surrounding conduit, and the other of said gases passageways is defined between the inner and outer conduits, and
• wherein said conduit includes at least one longitudinal strip, part or all of said strip being of a material that allows the passage of water vapour without allowing the passage of liquid water or respiratory gases, said strip or strips extending parallel to the axis of said conduit, edges of said strip or strips adjoining or overlapping to form an enclosed tube and bonded and
• said conduit includes lateral reinforcement against crushing, and
• wherein said lateral reinforcement is a helical bead or a series of annular ring beads or ribs distributed over the length of said conduit, and
• said conduit includes a further wall of a material that allows the passage of water vapour without allowing the passage of liquid water or respiratory gases, and
• said further wall is spaced from said first wall by at least said helical bead.

A breathing circuit limb having both inspiratory and expiratory gases passageways, each having a respective inlet and outlet and a first wall defining a gases passageway extending from said inlet to said outlet, at least a region of the wall of the expiratory conduit being of a material that allows the passage of water vapour without allowing the passage of liquid water or respiratory gases, and

• wherein one said gases passageway is defined by an inner conduit, said inner conduit is disposed substantially coaxially within an external surrounding conduit, and the other of said gases passageways is defined between the inner and outer conduits, and
• wherein said conduit is blown film tube of a material that allows the passage of water vapour without allowing the passage of liquid water or respiratory gases, and
• said conduit includes lateral reinforcement against crushing, and
• wherein said lateral reinforcement is a helical bead or a series of annular ring beads or ribs distributed over the length of said conduit, and
• said conduit includes a further wall of a material that allows the passage of water vapour without allowing the passage of liquid water or respiratory gases, and
• said further wall is spaced from said first wall by at least said helical bead.