Below pump segment air in line capture
AssigneeCareFusion 303, Inc.
InventorsJason Andrew WINE, Eugene E. MASON
Life of this patent
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Abstract
Devices for capturing air in a fluid pathway are provided. The device includes IV tubing configured to be disposed within an air-in-line sensor and a flow cannula disposed within the IV tubing. The flow cannula includes a center lumen disposed axially along the flow cannula, wherein the flow cannula is configured to direct an incoming fluid flow from a pump segment through the center lumen into an air capture device and to direct processed fluid received back from the air capture device through the flow cannula externally to the center lumen and internally to the IV tubing. Methods for capturing air in a fluid pathway and flow cannulas for use within IV tubing are also provided.
Claims20
A device for capturing air in a fluid pathway, the device comprising:
- intravenous (IV) tubing configured to be disposed within an air-in-line sensor;
- and
- a flow cannula disposed within the IV tubing, the flow cannula comprising a center lumen disposed axially along the flow cannula,
- wherein the flow cannula is configured to direct an incoming fluid flow from a pump segment through the center lumen and into an air capture device,
- and wherein the flow cannula is configured to direct processed fluid received back from the air capture device through the flow cannula externally to the center lumen and internally to the IV tubing.
A method for capturing air in a fluid pathway, the method comprising:
- placing intravenous (IV) tubing comprising a flow cannula within an air-in-line sensor of an infusion pump;
- positioning the flow cannula between a transmitter and a receiver of the air-in-line sensor;
- directing fluid flow from the infusion pump through a center lumen of the flow cannula having a center lumen wall configured to reflect waves from the transmitter from passing through the center lumen;
- directing fluid flow from the center lumen into an air capture device;
- and
- directing fluid flow from the air capture device back into the flow cannula to fill one or more channels around the center lumen wall with fluid.
A flow cannula for use within intravenous (IV) tubing, the flow cannula comprising:
- an axially disposed center lumen wall defining a center lumen;
- a first channel wall extending radially from the center lumen wall;
- a second channel wall extending radially from the center lumen wall and on an opposite side of the center lumen wall from the first channel wall;
- a first flow channel disposed between a first side of the first channel wall, a first side of the second channel wall and a first portion of the center lumen wall;
- a second flow channel disposed between a second side of the first channel wall, a second side of the second channel wall and a second portion of the center lumen wall;
- and
- a flow hole disposed in one of the first channel wall and the second channel wall, the flow hole fluidly coupling the first flow channel and the second flow channel.
Dependencies are inferred from the claim text.