Pump Set with Safety Interlock

• US 20070253833A1
• Filed: 01/05/2007
• Published: 11/01/2007
• Est. Priority Date: 03/02/2006
• Status: Active Grant

• Current Assignee: Kpr U.S., LLC (Cardinal Health, Inc.)
• Original Assignee: Tyco Healthcare Group LP (Medtronic Plc)
• Inventors: Hanlon, James G., Meier, Kevin C., Wiesner, Joel D., Swisher, David R.
• Granted Patent: US 7,722,562 B2
• Time in Patent Office: Days
• US Class Current: 417/63
• CPC Class Codes: A61M 2202/0482 Enteral feeding product
• CPC Class Codes: A61M 2205/14 Detection of the presence or absence of a tube, a connector or a container in an apparatus
• CPC Class Codes: A61M 2205/3306 Optical measuring means
• CPC Class Codes: A61M 2205/3313 used specific wavelengths
• CPC Class Codes: A61M 2205/6063 Optical identification systems
• CPC Class Codes: A61M 5/14232 Roller pumps
• CPC Class Codes: F04B 43/0081 systems, control, safety measures
• 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 pump set for use with a pump to deliver a supply of liquid to a patient. The feeding set has a conduit for the nutrient liquid and a safety interlock device associated with the conduit. The pumping apparatus has a pumping device and a control system for controlling operation of the pump. An electromagnetic radiation source is operatively connected to the control system of the pump for emitting an electromagnetic radiation signal in a direction for striking the safety interlock device of the feeding set. The safety interlock device is adapted to affect the direction of the electromagnetic radiation. An electromagnetic radiation detector is operatively connected to the control system for receiving the electromagnetic radiation signal when the direction is affected by the safety interlock device, and providing an indication to the control system that the feeding set conduit is properly positioned in the feeding pump.

Claims

1. A pump set for use in a pumping apparatus having a control system for controlling operation of the pumping apparatus to supply fluid to a patient through the pump set loaded in the pumping apparatus, a source of electromagnetic radiation operatively connected to the control system of the pumping apparatus for emitting electromagnetic radiation, an electromagnetic radiation detector operatively connected to the control system for providing an indication that the pump set is properly loaded on the pumping apparatus, the pump set comprising:

a conduit for carrying fluid to a patient;

an electromagnetic radiation propagation affecting member associated with the conduit and adapted for mounting in the pumping apparatus in the path of the electromagnetic radiation from the source of electromagnetic radiation, the propagation affecting member comprising a body defining a fluid passage in communication with the conduit for passing fluid through the body, the fluid passage having an axis, the body including a light transmitting portion projecting generally radially from the fluid passage, the light transmitting portion being formed of a material that transmits electromagnetic radiation, the light transmitting portion including at least one interposing surface and at least one channel located closer to the axis of the fluid passage than the interposing surface, the channel defining a reflection surface generally disposed on a radially outward side of the channel.

9. A pump set as set forth in claim 1 wherein the channel has a generally L-shaped cross section.

10. A pump set as set forth in claim 9 wherein the channel includes a first portion extending a first axial distance into the body, and a second portion extending a second axial distance into the body greater than the first axial distance.

11. A pump set as set forth in claim 10 wherein the second channel has a generally L-shaped cross section.

12. A pump set as set forth in claim 1 wherein the body includes first and second generally cylindrical portions extending axially in opposite directions from the light transmitting portion, the fluid passage extending through the cylindrical portions.

13. A pump set as set forth in claim 1 wherein the light transmitting portion of the body is formed of a material that transmits electromagnetic radiation in the infrared range and blocks transmission of electromagnetic radiation in the visible range.

14. A pump set as set forth in claim 1 in combination with the pumping apparatus, the pumping apparatus comprising a housing including a recess sized and shaped for receiving the propagation affecting member of the pump set therein, and a door pivotally mounted on the housing for movement between an open position in which the recess is exposed for insertion of the propagation affecting member into and removal from the recess, and a closed position in which the door is adapted to substantially close the propagation affecting member in the recess and block ambient light from entering the recess.

15. A pump set as set forth in claim 14 wherein the pumping apparatus further comprises a door pivotally mounted on the housing for movement between an open position in which the recess is exposed for insertion of the propagation affecting member into and removal from the recess, and a closed position in which the door is adapted to substantially close the propagation affecting member in the recess and block ambient light from entering the recess.

16. A pump set as set forth in claim 1 wherein the ratio of the radius of the reflection surface to the radius of the interposing surface is less than or equal to about 60 percent.

2. A pump set as set forth in 1 wherein the body has a generally axially facing surface, and the channel extends axially inward from the axially facing surface.

3. A pump set as set forth in claim 2 wherein the channel is at least partially in axial alignment with the interposing surface

4. A pump set as set forth in claim 3 wherein the channel and reflection surface are generally annular extending around the axis of the fluid passage.

5. A pump set as set forth in claim 4 wherein the axially facing surface constitutes a first axially facing surface, the light transmitting portion of the body further comprising a second generally axially facing surface facing in an axial direction opposite to the first axially facing surface.

6. A pump set as set forth in claim 5 wherein the second axially facing surface is disposed at an angle to the axis of the fluid passage.

7. A pump set as set forth in claim 6 wherein the second axially facing surface is generally frustoconical in shape.

8. A pump set as set forth in claim 5 wherein the channel in the first axially facing surface constitutes a first channel, and wherein the second axially facing surface has a second channel formed therein.

17. A safety interlock for use in a medical device having a control system for controlling operation of the medical device, a source of electromagnetic radiation operatively connected to the control system of the medical device for emitting electromagnetic radiation, an electromagnetic radiation detector operatively connected to the control system for providing an indication that the safety interlock is properly loaded on the medical device, the safety interlock comprising an electromagnetic radiation propagation affecting member associated with the conduit and adapted for mounting in the medical device in the path of the electromagnetic radiation from the source of electromagnetic radiation, the propagation affecting member comprising a body defining a fluid passage in communication with the conduit for passing fluid through the body, the fluid passage having an axis, the body including a light transmitting portion projecting generally radially from the fluid passage, the light transmitting portion being formed of a material that transmits electromagnetic radiation, the light transmitting portion including at least one interposing surface and at least one channel located closer to the axis of the fluid passage than the interposing surface, the channel defining a reflection surface generally disposed on a radially outward side of the channel.

25. A safety interlock as set forth in claim 17 wherein the channel has a generally L-shaped cross section.

26. A safety interlock as set forth in claim 25 wherein the channel includes a first portion extending a first axial distance into the body, and a second portion extending a second axial distance into the body greater than the first axial distance.

27. A safety interlock as set forth in claim 26 wherein the second channel has a generally L-shaped cross section.

28. A safety interlock as set forth in claim 17 wherein the body includes first and second generally cylindrical portions extending axially in opposite directions from the light transmitting portion, the fluid passage extending through the cylindrical portions.

29. A pump set as set forth in claim 17 wherein the light transmitting portion of the body is formed of a material that transmits electromagnetic radiation in the infrared range and blocks transmission of electromagnetic radiation in the visible range.

30. A pump set as set forth in claim 17 wherein the ratio of the radius of the reflection surface to the radius of the interposing surface is less than or equal to about 60 percent.

18. A safety interlock as set forth in 17 wherein the body has a generally axially facing surface and the channel extends axially inward from the axially facing surface.

19. A safety interlock as set forth in claim 18 wherein the channel is at least partially in axial alignment with the interposing surface

20. A safety interlock as set forth in claim 19 wherein the channel and reflection surface are generally annular extending around the axis of the fluid passage.

21. A safety interlock as set forth in claim 20 wherein the axially facing surface constitutes a first axially facing surface, the light transmitting portion of the body further comprising a second generally axially facing surface facing in an axial direction opposite to the first axially facing surface.

22. A safety interlock as set forth in claim 21 wherein the second axially facing surface is disposed at an angle to the axis of the fluid passage.

23. A safety interlock as set forth in claim 22 wherein the second axially facing surface is generally frustoconical in shape.

24. A safety interlock as set forth in claim 21 wherein channel in the first axially facing surface constitutes a first channel, and wherein the second axially facing surface has a second channel formed therein.

31. A pumping system comprising:

pumping apparatus having a control system for controlling operation of the pumping apparatus to supply fluid to a patient through a pump set loaded in the pumping apparatus, a source of electromagnetic radiation operatively connected to the control system of the pumping apparatus for emitting electromagnetic radiation, an electromagnetic radiation detector operatively connected to the control system for providing an indication that the pump set is properly loaded on the pumping apparatus;

the pump set comprising;

a conduit for carrying fluid to a patient,

an electromagnetic radiation propagation affecting member associated with the conduit and adapted for mounting in the pumping apparatus in the path of the electromagnetic radiation from the source of electromagnetic radiation, the propagation affecting member comprising a body defining a fluid passage in communication with the conduit for passing fluid through the body, the fluid passage having an axis, the body including a light transmitting portion projecting generally radially from the fluid passage, the light transmitting portion being formed of a material that transmits electromagnetic radiation, the light transmitting portion including at least one interposing surface and at least one channel located closer to the axis of the fluid passage than the interposing surface, the channel defining a reflection surface generally disposed on a radially outward side of the channel.