Adaptor for feeding sets

• US 7,070,575 B2
• Filed: 08/23/2004
• Issued: 07/04/2006
• Est. Priority Date: 04/16/2001
• Status: Expired due to Term

• Current Assignee: Zevex (Moog Incorporated)
• Original Assignee: Zevex (Moog Incorporated)
• Inventors: Beck, Kent F., Miles, Scott D., Malmstrom, James A.
• Primary Examiner(s): Look, Edward K.
• Assistant Examiner(s): Fristoe, Jr., John K.
• Application Number:
  US10/924,246
• Publication Number:
  US 20050209552A1
• Time in Patent Office: 680 Days
• Field of Search: 604/30, 604/31, 604/34, 604/65, 604/66, 604/67, 604/118, 604/119, 604/246, 417/63, 417/474, 417/475, 417/476, 417/477, 737/05
• US Class Current: 604/67
• CPC Class Codes: A61M 2005/16868 Downstream occlusion sensors
• CPC Class Codes: A61M 2005/16872 Upstream occlusion sensors
• CPC Class Codes: A61M 2205/12 with interchangeable cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 2205/3306 Optical measuring means
• CPC Class Codes: A61M 2205/3331 Pressure; Flow
• CPC Class Codes: A61M 39/281 Automatic tube cut-off devices, e.g. squeezing tube on detection of air
• CPC Class Codes: A61M 5/14232 Roller pumps
• CPC Class Codes: A61M 5/16854 by monitoring line pressure
• CPC Class Codes: A61M 5/365 Air detectors A61M5/1684 takes precedence; in extracorporeal blood circuits A61M1/3626
• CPC Class Codes: F04B 43/0072 of tubular flexible members
• CPC Class Codes: F04B 43/1253 by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing

Abstract

A feeding set adaptor and related system for delivering solutions utilize a feeding set adaptor which engages a pump engaging portion of an infusion set and the feeding set adaptor structure to provide monitoring portions for detecting pressures within the infusion set, a sample cell for determining the presence of air within an infusion set, and an anti-freeflow device for selectively preventing freeflow through the infusion set. The feeding set adaptor is configured for mounting on an infusion pump which moves solution through the infusion set for delivery to a patient.

Claims

1. A solution delivery system comprising a feeding set, a void configured for receiving a portion of the feeding set and a first optical signal emitter and a first optical signal detector disposed adjacent to the feeding set, the a first optical signal emitter and a first optical signal detector being configured for determining pressure in the feeding set when a feeding set is disposed in the void;

and

further comprising an optical bubble detector, the bubble detector comprising a sample cell formed as part of the feeding set and a second optical signal emitter and a second optical signal detector disposed adjacent the sample cell, the sample cell being configured such that more light is directed from the second optical signal emitter to the second optical signal detector when an air bubble is present in the sample cell.

2. The solution delivery system according to claim 1, wherein the feeding set has a monitoring portion, and wherein the solution delivery system is configured so that at least a portion of the monitoring portion is disposed between the first optical signal emitter and the first optical signal detector.

3. The solution delivery system according to claim 1, wherein the sample cell is configured to always direct some light from the optical signal emitter to the optical signal detector.

4. The solution delivery system of claim 1, wherein the feeding set comprises a flexible tubing and wherein expansion of the tubing due to pressure within the tubing causes the tubing to block the flow of light from the first optical emitter to the second optical detector.

5. The solution delivery system of claim 1, wherein the first optical emitter and first optical detector are disposed on generally opposite sides of the tubing.

6. The solution delivery system of claim 1, wherein the tubing is disposed between the first optical emitter and first optical detector such that the tubing always obstructs some light flow between the first optical emitter and first optical detector, and such that the tubing always allows some light flow between the first optical emitter and first optical detector.

7. The solution delivery system of claim 1, wherein the sample cell is connected to a flexible infusion tubing.

8. The solution delivery system of claim 1, wherein the sample cell has a pair of non-parallel sidewalls.

9. A solution delivery system comprising a feeding set, a void configured for receiving a portion of the feeding set and an optical sensor disposed adjacent to the feeding set, the optical sensor being configured for determining pressure in the feeding set when a feeding set is disposed in the void;

wherein the feeding set has a monitoring portion, and wherein the optical sensor comprises an optical signal emitter and an optical signal detector, and wherein the solution delivery system is configured so that at least a portion of the monitoring portion is disposed between the optical signal emitter and the optical signal detector; and

wherein the monitoring portion is disposed between the optical signal emitter and the optical signal detector, so that it always occludes some light flow between the optical signal emitter and the optical signal detector during use.

10. A solution delivery system comprising a feeding set, a void configured for receiving a portion of the feeding set and an optical sensor disposed adjacent to the feeding set, the optical sensor being configured for determining pressure in the feeding set when a feeding set is disposed in the void;

wherein the feeding set has a monitoring portion, and wherein the optical sensor comprises an optical signal emitter and an optical signal detector, and wherein the solution delivery system is configured so that at least a portion of the monitoring portion is disposed between the optical signal emitter and the optical signal detector; and

wherein the monitoring portion is disposed between the optical signal emitter and the optical signal detector, so that it always allows some light flow between the optical signal emitter and the optical signal detector during use.

11. A method for monitoring pressure in an infusion set, the method comprising:

selecting a feeding set adaptor having a pump engaging portion of an infusion set disposed thereon and defining a monitoring portion; and

disposing the monitoring portion between an optical emitter and an optical detector to measure changes in the size of the tube to thereby detect pressure changes in the monitoring portion by changes in the diameter of the monitoring portion; and

wherein the method comprises disposing the monitoring portion between the optical emitter and the optical detector, so that the monitoring portion always allows some light to pass unobstructed between the optical emitter and the optical detector when the pressure within the infusion set is within a normal range.

12. The method according to claim 11, wherein the method further comprises selecting a feeding set adapter having a sample cell and disposing the sample cell between a second optical emitter and a second optical detector.

13. The method according to claim 12, wherein the method comprises selecting a sample cell having non-parallel side walls such that more light is directed from the optical emitter to the optical detector when a bubble is present in the sample cell.

14. The method according to claim 11, wherein the method comprises disposing the monitoring portion between the optical emitter and the optical detector, so that the monitoring portion always obstructs some light flow between the optical emitter and the optical detector when the pressure within the infusion set is within a normal range.

15. A method for monitoring pressure in an infusion set, the method comprising:

selecting a feeding set adaptor having a pump engaging portion of an infusion set disposed thereon and defining a monitoring portion; and

disposing the monitoring portion in an optical sensor to detect pressure changes in the monitoring portion by changes in the diameter of the monitoring portion;

wherein the method comprises disposing the monitoring portion between an optical emitter and an optical detector to measure changes in the size of the tube; and

wherein the method further comprises limiting the radial expansion of the monitoring portion in at least one dimension, so as to exaggerate radial expansion of the monitoring portion in another dimension.

16. The method according to claim 15, wherein the method comprises placing an abutment member against the infusion set along the monitoring portion.

17. The method according to claim 15, wherein the method comprises placing a jacket around part of the infusion set along the monitoring portion.

18. The method according to claim 15, wherein the method comprises triggering an alarm in response to undesired expansion of the monitoring portion of the infusion set.

19. A solution delivery system comprising a feeding set, a void configured for receiving a portion of the feeding set and an optical sensor disposed adjacent to the feeding set, the optical sensor being configured for determining pressure in the feeding set when a feeding set is disposed in the void;

and

further comprising an abutment member disposed to at least partially limit radial expansion of the monitoring portion.

20. The system according to claim 19, wherein the abutment member is disposed on a side of the monitoring portion opposite a side disposed between the optical sensor and the optical emitter.

21. A solution delivery system comprising a feeding set, a void configured for receiving a portion of the feeding set and an optical sensor disposed adjacent to the feeding set, the optical sensor being configured for determining pressure in the feeding set when a feeding set is disposed in the void;

and

further comprising a jacket disposed to at least partially limit radial expansion of the monitoring portion.

22. The system according to claim 21, wherein the jacket has an opening disposed on a side of the monitoring portion disposed between the optical sensor and the optical emitter.