Monitoring upstream flow characteristics for a pump

Patent metadata

Field	Value
Publication number	US-12377212-B2
Application number	US-202217740153-A
Country	US
Kind code	B2
Filing date	May 9, 2022
Priority date	Oct 15, 2018
Publication date	Aug 5, 2025
Grant date	Aug 5, 2025

Abstract

A system for monitoring upstream flow characteristics for a pump is provided. The system may receive one or more outputs from a fluid level sensor coupled with a pump. The system may detect based on at least the one or more outputs, an abnormal upstream flow condition in the pump, such as a full upstream occlusion in the tube, a partial upstream occlusion in the tube, an empty reservoir, and/or a backflow of the fluid into the drip chamber. The system may adjust, based on the detection of an abnormal upstream flow condition in the pump, operation of the pump.

First claim

What is claimed is:

1. A system, comprising:
at least one data processor; and
at least one memory storing instructions, which when executed by the at least one data processor, result in operations comprising:
receiving, from a fluid level sensor, one or more first outputs indicative of a fluid level in a drip chamber, the fluid level sensor coupled with a pump, the pump configured to move a fluid from a reservoir containing the fluid to the drip chamber, the fluid being moved through a tube upstream from the pump;
receiving one or more second outputs from a drop sensor coupled with the pump and/or a pressure sensor coupled with the pump, wherein the one or more second outputs from the drop sensor indicate a drip rate for the fluid and the one or more second outputs from the pressure sensor indicate existence of a vacuum in the tube;
detecting, based at least on the one or more first outputs and the one or more second outputs, an abnormal upstream flow condition in the pump, the abnormal upstream flow condition including a full upstream occlusion in the tube, a partial upstream occlusion in the tube, an empty reservoir, and/or a backflow of the fluid into the drip chamber; and
adjusting, based on the detection of the abnormal upstream flow condition in the pump, operation of the pump.

2. The system of claim 1 , wherein the fluid level sensor is configured to measure the fluid level in the drip chamber by at least transmitting a signal and measuring a quantity of time required for the signal to travel through the fluid in the drip chamber.

3. The system of claim 2 , wherein the fluid level sensor is configured to detect drops of the fluid entering the drip chamber by at least measuring the fluid level in the drip chamber at a greater frequency than a frequency at which the drops of the fluid enter the drip chamber.

4. The system of claim 1 , wherein the adjusting the operation of the pump comprises:
generating a message to activate an element of the pump, wherein the element includes at least one of a valve, a light, or an audio alarm equipment; and
transmitting the message to the pump.

5. The system of claim 1 , wherein the full upstream occlusion in the tube is detected when a fluid level in the drip chamber remains fixed.

6. The system of claim 1 , wherein the partial upstream occlusion in the tube is detected when the fluid level in the drip chamber decreases while drops of the fluid continue to enter the drip chamber.

7. The system of claim 6 , wherein the partial upstream occlusion in the tube is detected when drops of the fluid continue to enter the drip chamber at a drip rate that is less than an expected drip rate for the pump.

8. The system of claim 1 , wherein the operations further comprise: predicting that the empty reservoir, the full upstream occlusion in the tube, and/or the partial upstream occlusion in the tube will occur when the fluid level in the drip chamber decreases while no drops of fluid enter the drip chamber.

9. The system of claim 1 , wherein the backflow of the fluid into the drip chamber is detected based at least on an increase in the fluid level in the drip chamber.

10. The system of claim 1 , further comprising:
the pump;
the reservoir containing the fluid;
the drip chamber; and
the fluid level sensor.

11. A method comprising:
receiving, from a fluid level sensor, one or more first outputs indicative of a fluid level in a drip chamber, the fluid level sensor coupled with a pump, the pump configured to move a fluid from a reservoir containing the fluid to the drip chamber, the fluid being moved through a tube upstream from the pump;
receiving one or more second outputs from a drop sensor coupled with the pump and/or a pressure sensor coupled with the pump, wherein the one or more second outputs from the drop sensor indicate a drip rate for the fluid and the one or more second outputs from the pressure sensor indicate existence of a vacuum in the tube;
detecting, based at least on the one or more first outputs and the one or more second outputs, an abnormal upstream flow condition in the pump, the abnormal upstream flow condition including a full upstream occlusion in the tube, a partial upstream occlusion in the tube, an empty reservoir, and/or a backflow of the fluid into the drip chamber; and
adjusting, based on the detection of the abnormal upstream flow condition in the pump, operation of the pump.

12. The method of claim 11 , wherein the fluid level sensor is configured to measure the fluid level in the drip chamber by at least transmitting a signal and measuring a quantity of time required for the signal to travel through the fluid in the drip chamber.

13. The method of claim 12 , wherein the fluid level sensor is configured to detect drops of the fluid entering the drip chamber by at least measuring the fluid level in the drip chamber at a greater frequency than a frequency at which the drops of the fluid enter the drip chamber.

14. The method of claim 11 , wherein the adjusting the operation of the pump comprises causing activation of an element of the pump, wherein the element includes at least one of a valve, a light, or an audio alarm equipment.

15. The method of claim 11 , wherein the full upstream occlusion in the tube is detected when the fluid level in the drip chamber remains fixed.

16. The method of claim 11 , wherein the partial upstream occlusion in the tube is detected when the fluid level in the drip chamber decreases while drops of the fluid continue to enter the drip chamber.

17. The method of claim 16 , wherein the partial upstream occlusion in the tube is detected when the drops of the fluid continue to enter the drip chamber at a drip rate that is less than an expected drip rate for the pump.

18. The method of claim 11 , further comprising: predicting that the empty reservoir, the full upstream occlusion in the tube, and/or the partial upstream occlusion in the tube will occur when the fluid level in the drip chamber decreases while no drops of fluid enter the drip chamber.

19. The method of claim 11 , wherein the backflow of the fluid into the drip chamber is detected based at least on an increase in the fluid level in the drip chamber.

Assignees

• Carefusion 303 Inc

Inventors

• Addiego Nicholas
• Bailey Shannon
• Butterfield Robert Dwaine
• Davis Denton

Classifications

• A61M2205/583

  by visual feedback · CPC title

• A61M2205/581

  by audible feedback · CPC title

• A61M2205/3389

  Continuous level detection (A61M2205/3393 takes precedence) · CPC title

• A61M2205/3351

  Controlling upstream pump pressure · CPC title

• A61M2205/18

  with alarm · CPC title