Air trap for a medical infusion device
First Claim
1. A dialysis system comprising:
- an air trap; and
a fluid pump configured to pump fluid from an upper inlet to a lower outlet of the air trap;
the air trap comprising;
a container having an approximately spherical or spheroid-shaped internal wall defining a chamber,the inlet of the air trap positioned at a top end of the container and the outlet of the air trap positioned at a bottom end of the container,the inlet being offset from a vertical axis of the container such that fluid entering the chamber through the inlet is directed to flow along the internal wall toward the outlet;
wherein the air trap is configured to accumulate undissolved gas from the fluid at the top end of the container, andthe fluid pump is configured to pump the fluid into the container via the outlet and out of the container via the inlet of the air trap to remove accumulated undissolved gas from the container.
1 Assignment
0 Petitions
Accused Products
Abstract
An air trap for a blood circuit and method for removing air from blood in a dialysis unit. The air trap may include a blood inlet supply line, a blood outlet supply line, and a container having an approximately spherical internal wall, an inlet at a top end of the container connected to the blood inlet supply line, and an outlet at a bottom end of the container connected to the blood outlet supply line. The inlet may be offset from a vertical axis of the approximately spherical internal wall such that blood entering the container is directed to flow in a spiral-like path. The inlet port may be arranged to introduce blood into the container in a direction that is approximately tangential to the approximately spherical inner wall of the container and/or in a direction that is approximately perpendicular to the vertical axis of the container.
175 Citations
14 Claims
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1. A dialysis system comprising:
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an air trap; and a fluid pump configured to pump fluid from an upper inlet to a lower outlet of the air trap; the air trap comprising; a container having an approximately spherical or spheroid-shaped internal wall defining a chamber, the inlet of the air trap positioned at a top end of the container and the outlet of the air trap positioned at a bottom end of the container, the inlet being offset from a vertical axis of the container such that fluid entering the chamber through the inlet is directed to flow along the internal wall toward the outlet; wherein the air trap is configured to accumulate undissolved gas from the fluid at the top end of the container, and the fluid pump is configured to pump the fluid into the container via the outlet and out of the container via the inlet of the air trap to remove accumulated undissolved gas from the container. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification