Apparatus for infusing fluid

Patent metadata

Field	Value
Publication number	US-2025387559-A1
Application number	US-202418749772-A
Country	US
Kind code	A1
Filing date	Jun 21, 2024
Priority date	Jun 21, 2024
Publication date	Dec 25, 2025
Grant date	—

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.

First claim

1 . (canceled)

2 . A pump, comprising:
a tube platen; a plunger; a bias member configured to urge the plunger toward the tube platen; and an actuator mechanism configured to control an actuation of the plunger, the actuator mechanism being disengageable from the plunger, wherein when the actuator mechanism is disengaged, the bias member is a sole source of actuation force of the plunger toward the tube platen.

3 . The pump to claim 2 , further comprising:
a position sensor configured to estimate a position of the plunger.

4 . The pump according to claim 3 , further comprising:
a processor configured to detect an anomaly based at least in part on the estimated plunger position.

5 . The pump according to claim 4 , wherein the processor is further configured to estimate fluid flow in accordance with the estimated plunger position when the actuator mechanism is disengaged from the plunger.

6 . The pump according to claim 2 , further comprising:
an inlet valve upstream of the plunger configured for actuation between an occluding position and a non-occluding position; and an outlet valve downstream of the plunger configured for actuation between an occluding position and a non-occluding position.

7 . The pump according to claim 2 , further comprising:
a pressure sensor configured to estimate a position of the plunger.

8 . The pump according to claim 2 , further comprising:
an ultrasonic sensor sensitive to gas in an infusion tube, the ultrasonic sensor sensitive to gas in an infusion tube.

9 . The pump according to claim 8 , wherein the ultrasonic sensor is located downstream of the plunger.

10 . The pump according to claim 6 , further comprising:
a processor configured to estimate a plunger position when the actuator mechanism is disengaged from the plunger to determine fluid flow and to determine a volume of air pumped downstream based on the estimated plunger position.

11 . A pump, comprising:
a tube platen; a plunger; 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; a position sensor configured to estimate a position of the plunger; and a processor operatively coupled to the position sensor to receive an estimated plunger position of the plunger and to estimate fluid flow in accordance with the estimated plunger position when at least one of the inlet and outlet valve are occluded.

12 . The pump according to claim 11 , further comprising:
a bias member configured to urge the plunger toward the tube platen.

13 . The pump according to claim 12 , further comprising:
an actuator mechanism configured to control an actuation of the plunger, the actuator mechanism being disengageable from the plunger, wherein when the actuator mechanism is disengaged, the bias member is a sole source of actuation force of the plunger toward the tube platen.

14 . The pump according to claim 11 , further comprising:
a pressure sensor configured to estimate a position of the plunger.

15 . The pump according to claim 11 , further comprising:
an ultrasonic sensor sensitive to gas in an infusion tube.

16 . The pump according to claim 15 , wherein the ultrasonic sensor is located downstream of the plunger.

17 . The pump according to claim 13 , further comprising:
a processor configured to estimate a plunger position when the actuator mechanism is disengaged from the plunger to determine fluid flow and to determine a volume of air pumped downstream based on the estimated plunger position.

18 . The pump according to claim 13 , wherein the processor is further configured to estimate fluid flow in accordance with the estimated plunger position when the actuator mechanism is disengaged from the plunger.

19 . The pump according to claim 11 , further comprising:
a processor configured to determine that an occlusion has occurred based on a predetermined condition.

20 . The pump according to claim 11 , further comprising:
a processor configured to determine that a leak has occurred based on a predetermined condition.

21 . The pump according to claim 11 , further comprising:
a processor configured to determine an anomaly has occurred based at least in part on a deviation from an expected rate of plunger position.

Assignees

• Deka Products Lp

Inventors

• Kamen Dean
• Kerwin John M
• Murphy Colin H
• Parker Jonathan
• Pawlowski Daniel F
• Van Der Merwe Dirk A
• Gray Larry B
• Langengeld Christopher C
• Place Michael S
• Slate Michael J

Classifications

• A61M5/365

  Air detectors (A61M5/1684 takes precedence; in extracorporeal blood circuits A61M1/3626) · CPC title

• A61M5/1456

  with a replaceable reservoir comprising a piston rod to be moved into the reservoir, e.g. the piston rod is part of the removable reservoir · CPC title

• A61M5/16831

  Monitoring, detecting, signalling or eliminating infusion flow anomalies (low-level float-valves causing cut-off A61M5/40; indicating or recording presence, absence or direction of flow in general G01P13/0066) · CPC title

• A61M5/172

  electrical or electronic {(A61M5/16804, A61M5/16831 take precedence)} · CPC title

• A61M5/1458

  Means for capture of the plunger flange · CPC title