Method of filling a tube system with a rinsing liquid and a tube system for use with this method
First Claim
1. A method of filling a tube system with a rinsing liquid while maintaining sterility of the tube system, the tube system including a blood inlet line with an arterial patient connection, a blood return line with a venous patient connection, a rinsing liquid inlet line branching off from the blood inlet line downstream from the arterial patient connection, and a rinsing liquid return line branching off from the blood return line upstream from the venous patient connection, the method comprising the steps of:
- conveying rinsing liquid from a rinsing liquid container into the rinsing liquid inlet line, establishing a liquid connection between the rinsing liquid inlet and the rinsing liquid return line, forming a liquid-tight seal for the venous patient connection with a venous safety cap, and forming a liquid-tight seal for the arterial patient connection with an arterial safety cap, wherein the venous safety cap and the arterial safety cap are removable from the venous and arterial patient connections.
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Accused Products
Abstract
A tube system comprising a blood inlet line with an arterial patient connection and a blood return line with a venous patient connection, where a rinsing liquid inlet line branches off from the blood inlet line downstream from the arterial patient connection, and a rinsing liquid return line branches off from the blood return line upstream from the venous patient connection is filled while maintaining sterility in that rinsing liquid is pumped from a rinsing liquid container through the rinsing liquid inlet line, the blood inlet line, the blood return line and the rinsing liquid return line, establishing a liquid connection between the rinsing liquid inlet line and return line. The venous patient connection is sealed liquid-tight with a venous safety cap, and the arterial patient connection is sealed liquid-tight with an arterial safety cap. The safety caps are removed from the patient connections for connecting the tube system to the patient.
6 Citations
27 Claims
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1. A method of filling a tube system with a rinsing liquid while maintaining sterility of the tube system, the tube system including a blood inlet line with an arterial patient connection, a blood return line with a venous patient connection, a rinsing liquid inlet line branching off from the blood inlet line downstream from the arterial patient connection, and a rinsing liquid return line branching off from the blood return line upstream from the venous patient connection, the method comprising the steps of:
conveying rinsing liquid from a rinsing liquid container into the rinsing liquid inlet line, establishing a liquid connection between the rinsing liquid inlet and the rinsing liquid return line, forming a liquid-tight seal for the venous patient connection with a venous safety cap, and forming a liquid-tight seal for the arterial patient connection with an arterial safety cap, wherein the venous safety cap and the arterial safety cap are removable from the venous and arterial patient connections. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A tube system comprising:
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a blood inlet line having an arterial patient connection;
an arterial safety cap for liquid-tight sealing of the arterial patient connection, the arterial safety cap being removable from the arterial patient connection for connecting the tube system, a blood return line having a venous patient connection;
a venous safety cap for liquid-tight sealing of the venous patient connection, the venous safety cap being removable from the venous patient connection for connecting the tube system;
a rinsing liquid inlet line branching off from the blood inlet line downstream from the arterial patient connection and a rinsing liquid return line branching off from the blood return line upstream from the venous patient connection, the rinsing liquid inlet line and the rinsing liquid return line being connected to a rinsing liquid container for accommodating rinsing liquid;
a first cut-off device being connected to the rinsing liquid inlet line downstream from the rinsing liquid container;
a second cut-off device being connected to the rinsing liquid return line upstream from the rinsing liquid container;
a short-circuit line connecting the rinsing liquid inlet line and the rinsing liquid return line; and
at least one of a third cut-off device and a pressure control valve being connected to the short-circuit line. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 19, 20, 21, 22, 23, 24, 26)
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18. A tube system comprising:
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a blood inlet line having an arterial patient connection;
an arterial safety cap for liquid-tight sealing of the arterial patient connection, the arterial safety cap being removable for connecting the tube system;
a blood return line having a venous patient connection;
a venous safety cap for liquid-tight sealing of the venous patient connection, the venous safety cap being removable from the venous patient connection for connecting the tube system;
a rinsing liquid inlet line branching off from the blood inlet line downstream from the arterial patient connection and a rinsing liquid return line branching off from the blood return line upstream from the venous patient connection and having a free end, the rinsing liquid inlet line being connected to a rinsing liquid container for accommodating the rinsing liquid;
a first cut-off device being connected to the rinsing liquid inlet line downstream from the rinsing liquid container, the rinsing liquid inlet line between the rinsing liquid container and the first cut-off device defining a line section of the rinsing liquid inlet line, the free end of the rinsing liquid return line being connected to the line section; and
a second cut-off device connected to the rinsing liquid return line.
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25. A safety cap unit for a tube system comprising:
an interior venous chamber for accommodating a venous patient connection; and
an interior arterial chamber for accommodating an arterial patient connection of the tube system under sterile conditions, the interior venous chamber being connected to an environment by a hydrophobic membrane.
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27. A safety cap unit for a tube system comprising:
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an interior venous chamber for accommodating a venous patient connection; and
an interior arterial chamber for accommodating an arterial patient connection of the tube system under sterile conditions, the interior venous chamber being connected to the interior arterial chamber by a hydrophobic membrane.
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Specification