Apparatus for Infusing Fluid
First Claim
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1. A pump for pumping fluid, the pump comprising:
- a tube platen;
an plunger configured for actuation toward and away from the tube platen when the tube platen is disposed opposite to the plunger;
a bias member configured to urge the plunger toward the tube platen;
an inlet valve upstream of the plunger configured for actuation between an occluding position and a non-occluding position;
an outlet valve downstream of the plunger configured for actuation between an occluding position and a non-occluding position;
an actuator mechanism configured to control the actuation of the plunger, the inlet valve and the outlet valve;
a position sensor configured to estimate a position of the plunger; and
a processor coupled to the position sensor to receive the estimated position of the plunger therefrom, wherein the processor is configured to detect an anomaly based in part on the estimated plunger position when the inlet valve is in the occluding position and the outlet valve is in the occluding position.
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Accused Products
Abstract
A pump for pumping fluid includes a tube platen, a plunger, a bias member, inlet and outlet valves, an actuator mechanism, a position sensor, and a processor. The plunger is configured for actuation toward and away from the infusion-tube when the tube platen is disposed opposite to the plunger. The tube platen can hold an intravenous infusion tube. The bias member is configured to urge the plunger toward the tube platen.
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Citations
21 Claims
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1. A pump for pumping fluid, the pump comprising:
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a tube platen; an plunger configured for actuation toward and away from the tube platen when the tube platen is disposed opposite to the plunger; a bias member configured to urge the plunger toward the tube platen; an inlet valve upstream of the plunger configured for actuation between an occluding position and a non-occluding position; an outlet valve downstream of the plunger configured for actuation between an occluding position and a non-occluding position; an actuator mechanism configured to control the actuation of the plunger, the inlet valve and the outlet valve; a position sensor configured to estimate a position of the plunger; and a processor coupled to the position sensor to receive the estimated position of the plunger therefrom, wherein the processor is configured to detect an anomaly based in part on the estimated plunger position when the inlet valve is in the occluding position and the outlet valve is in the occluding position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A pump for pumping fluid, the pump comprising:
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a tube platen; a plunger configured for actuation toward and away from the tube platen when the tube platen is disposed opposite to the plunger; a bias member configured to urge the plunger toward the tube platen; an inlet valve upstream of the plunger configured for actuation between an occluding position and a non-occluding position; an outlet valve downstream of the plunger configured for actuation between an occluding position and a non-occluding position; an actuator mechanism configured to control the actuation of the plunger, the inlet valve and the outlet valve; a pressure sensor disposed adjacent to at least one of the inlet valve, the outlet valve, and the plunger; and a processor coupled to the pressure sensor to receive a pressure signal from the pressure sensor, wherein; the inlet valve, the outlet valve, and the plunger are configured to pump fluid in a plurality of cycles, each cycle having a trough pressure level and a peak pressure level, and the processor is configured to, using the pressure signal, determine a downstream occlusion exists when a difference between a peak pressure level and a trough pressure level is greater than a predetermined threshold in a cycle of the plurality of cycles. - View Dependent Claims (18, 19, 20, 21)
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Specification