Interlock, latching, and retaining mechanism for an infusion pump

• US 5,601,420 A
• Filed: 09/12/1994
• Issued: 02/11/1997
• Est. Priority Date: 09/12/1994
• Status: Expired due to Term

• Current Assignee: Carefusion 303 Incorporated (Becton, Dickinson & Co)
• Original Assignee: IVAC Medical Systems, Inc. (Becton, Dickinson & Co)
• Inventors: Warner, Eric A., Howard, Paul L., Hobson, Phillip M., Minami, Don S.
• Primary Examiner(s): Freay, Charles G.
• Application Number:
  US08/305,468
• Time in Patent Office: 883 Days
• Field of Search: 417/474, 417/63, 417/477.1, 417/477.2, 417/360, 417/238, 604/153, 128/DIG. 12, 73/19.1, 73/753, 73/754, 73/756
• US Class Current: 417/474
• CPC Class Codes: A61M 5/14228 with linear peristaltic action, i.e. comprising at least three pressurising members or a helical member
• CPC Class Codes: F04B 43/021 the plate-like flexible member is pressed against a wall by a number of elements, each having an alternating movement in a direction perpendicular to the plane of the plate-like flexible member and each having its own driving mechanism
• CPC Class Codes: F04B 43/14 having plate-like flexible members
• CPC Class Codes: Y10S 128/12 Pressure infusion

Abstract

An interlock, latching and retaining mechanism for use in an infusion system, embodying a latch arm mounted to a rotatable shaft having a plurality of cams and gears attached thereto, a rectangular faceplate with a plurality of apertures formed therethrough, and a clamp. Rotating the latch arm functions to engage fluid monitoring, flow control and pumping structure of the infusion system with a pumping segment for control of fluid flow through the segment and also causes the clamp to hold the pumping segment in a required position. In another aspect, rotation of the latch arm additionally causes an air-in-line sensor to rotate into position on the pumping segment.

Claims

1. An interlock, latching and retaining mechanism for placing an infusion set into operating position on an infusion system having fluid flow control and pumping structure, comprising:

a faceplate;

a latch arm, said latch arm being rotatably mounted to said faceplate; and

means cooperating with said latch arm and said faceplate for placing the infusion set into operating position with the fluid flow control and pumping structure of the infusion system, wherein said cooperating means includes a shaft adapted to rotate in response to movement of the latch arm and place the infusion set into operating position with the fluid flow control and pumping structure of the infusion system.

2. An interlock, latching and retaining mechanism for placing an infusion set into operating position on an infusion system having fluid line monitoring and flow control structure, comprising:

a faceplate;

a latch arm, said latch arm being rotatably mounted to said faceplate; and

means cooperating with said latch arm and said faceplate for placing the infusion set into operating position with the fluid line monitoring and flow control structure of the infusion system, wherein said cooperating means includes a shaft adapted to rotate in response to movement of the latch arm and place the infusion set into operating position with the fluid line monitoring and flow control structure of the infusion system.

3. An interlock, latching and retaining mechanism for placing an infusion set into operating position on an infusion system having fluid line monitoring and pumping structure, comprising:

a faceplate;

a latch arm, said latch arm being rotatably mounted to said faceplate; and

means cooperating with said latch arm and said faceplate for placing the infusion set into operating position with the fluid line monitoring and pumping structure of the infusion system, wherein said cooperating means includes a shaft adapted to rotate in response to movement of the latch arm and place the infusion set into operating position with the fluid line monitoring and pumping structure of the infusion system.

4. An interlock, latching and retaining mechanism for placing an infusion set into operating position on an infusion system having fluid line monitoring, flow control and pumping structure, comprising:

a faceplate;

a latch arm, said latch arm being rotatably mounted to said faceplate; and

means cooperating with said latch arm and said faceplate for placing the infusion set into operating position with the fluid line monitoring, flow control and pumping structure of the infusion system, wherein said cooperating means includes a shaft adapted to rotate in response to movement of the latch arm and place the infusion set into operating position with the fluid line monitoring, flow control and pumping structure of the infusion system.

5. The interlock, latching and retaining mechanism of claim 4, wherein said cooperating means includes a clamp to hold a fluid flow segment of the infusion set in engagement with the fluid line monitoring, flow control and pumping structure of the infusion system.

6. The interlock, latching and retaining mechanism of claim 4, wherein said cooperating means places the pumping structure into operating position prior to placing the flow control structure into operating position to thereby avoid free flow conditions.

7. The interlock, latching and retaining mechanism of claim 4, wherein the infusion system includes an air-in-line sensor and said cooperating means places the infusion set into operating position with said air-in-line sensor by rotating said air-in-line sensor into and out of operating position with the infusion set.

8. The interlock, latching and retaining mechanism of claim 4, wherein said shaft includes a plurality of camming and gearing surfaces which interact with the fluid line monitoring, flow control and pumping structure of the infusion system.

9. An interlock, latching and retaining mechanism for an infusion set comprising:

a faceplate having a plurality of apertures formed therethrough;

a latch arm rotatably mounted to said faceplate and extending through a first aperture of said plurality of apertures formed in said faceplate;

a clamp having two opposing members, said clamp pivotably mounted to a rear surface of said faceplate, said opposing members extending through a second aperture of said plurality of apertures formed in said faceplate;

a shaft having a plurality of camming surfaces, said shaft being rotatably attached to said rear surface of said faceplate, said shaft adapted to be rotated by said latch arm; and

a first camming surface of said plurality of camming surfaces adapted to lock and unlock said clamp.

10. The interlock, latching and retaining mechanism as recited in claim 9, wherein a terminal end of said opposing members includes a plurality of fingers, said fingers adapted to releasably hold a fluid flow segment.

11. The interlock, latching and retaining mechanism as recited in claim 9, further comprising spring means for biasing said clamp in a closed configuration.

12. The interlock, latching and retaining mechanism as recited in claim 9, wherein said shaft includes a plurality of gearing surfaces.

13. The interlock, latching and retaining mechanism as recited in claim 12, wherein said latch arm includes a latch gear surface, said latch gear surface adapted to cooperate with a first gear surface of said plurality of gearing surfaces of said shaft.

14. The interlock, latching and retaining mechanism as recited in claim 13, wherein a second gear surface of said plurality of gearing surfaces of said shaft engages a flow control structure mounted to said faceplate.

15. The interlock, latching and retaining mechanism as recited in claim 14, wherein a third gear surface of said plurality of gearing surfaces of said shaft engages an air-in-line sensing structure mounted to said faceplate.

16. A mechanism for placing an infusion set into operating position on an infusion system capable of performing a plurality of functions, comprising:

a faceplate;

a latch arm, said latch arm being rotatably attached to said faceplate; and

means cooperating with said latch arm and said faceplate for placing the infusion set into operating position with the infusion system, wherein said cooperating means includes a shaft adapted to rotate in response to movement of the latch arm and place the infusion set into operating position.

17. A mechanism for placing an infusion set into operating position on an infusion system having a plurality of functions including an air-in-line sensor, comprising:

a faceplate;

a latch arm, said latch arm being rotatably attached to said faceplate; and

means cooperating with said latch arm and said faceplate for placing the infusion set into operating position with the infusion system, wherein said cooperating means places the infusion set into operating position with said air-in-line sensor by rotating said air-in-line sensor into operating position with the infusion set.

18. A mechanism for placing an infusion set into operating position on an infusion system having a fluid pumping device and a flow stop device, comprising:

a faceplate;

a latch arm, said latch arm being rotatably attached to said faceplate; and

means cooperating with said latch arm and said faceplate for placing the infusion set into operating position with the fluid pumping device of the infusion system prior to placing the fluid stop device in a position for allowing flow, so as to avoid free flow conditions.

19. The mechanism of claim 18, wherein the cooperating means places the flow stop device into a flow stop position so the infusion set is occluded prior to disengaging the fluid segment from the pumping device.

20. The mechanism of claim 19, wherein the infusion set includes fluid line monitoring structure and said cooperating means operates to place the fluid line monitoring structure into operating position contemporaneously with placing the fluid pumping structure into operating position.

21. The mechanism of claim 20, wherein the fluid line monitoring structure includes an air-in-line sensor and said cooperating means places the infusion set into operating position with said air-in-line sensor by rotating said air-in-line sensor.

22. A mechanism for placing an infusion set into operating position on an infusion system having a plurality of functions, comprising:

a faceplate;

a latch arm, said latch arm being rotatably attached to said faceplate; and

means cooperating with said latch arm and said faceplate for placing the infusion set into operating position with the infusion system, wherein said cooperating means includes a clamp responsive to movement of the latch arm that holds a fluid flow segment of the infusion set in a predetermined position.

23. The mechanism of claim 22, wherein said clamp includes spring-loaded fingers that engage the fluid flow segment to position the segment into the operating position.

24. The mechanism of claim 23, wherein actuation of said latch arm causes said spring-loaded fingers to alternatively assume locked and unlocked configurations.

25. The mechanism of claim 23, wherein the infusion system includes an air-in-line sensor and said cooperating means are also for rotating said air-in-line sensor into operating position with said infusion set.

26. A mechanism for placing an infusion set into operating position on an infusion system capable of performing a plurality of functions, the infusion set including tubing for fluid flow, said mechanism comprising:

a faceplate; and

a latch arm having a slot, said latch arm being rotatably attached to said faceplate and having an open position and a closed position;

wherein said slot engages and retains tubing when said latch arm is in the closed position.

27. The mechanism of claim 26, further comprising means cooperating with said latch arm and said faceplate for placing the infusion set into operating position with the infusion system, wherein the infusion system includes an air-in-line sensor and said cooperating means places the infusion set into operating position with said air-in-line sensor by rotating said air-in-line sensor.

28. The mechanism of claim 26, further comprising a clamp responsive to actuation of the latch arm for holding a fluid flow segment of the infusion set in operating position with the infusion system.

29. The mechanism of claim 28, wherein said clamp includes a plurality of spring-loaded fingers that engage the fluid flow segment.

30. The mechanism of claim 29, wherein said latch arm includes locking means responsive to movement of said latch arm, said locking means causing said spring-loaded fingers to assume a locked configuration when said latch arm is in the closed position and to assume an unlocked configuration when said latch arm is in the open position.

31. A mechanism for placing an infusion set into operating position with an infusion system having a flow control mechanism, comprising:

a faceplate;

a latch arm, said latch arm being rotatably attached to said faceplate; and

means cooperating with said latch arm and said faceplate for placing the infusion set into operating position with the infusion system, wherein said cooperating means includes means for retracting the flow control mechanism of the infusion system away from said faceplate so as to place the flow control mechanism out of operating position with the infusion set.

32. The mechanism of claim 31, wherein the infusion system includes an air-in-line sensor and said cooperating means places the infusion set into and out of operating position with said air-in-line sensor by rotating said air-in-line sensor.

33. The mechanism of claim 31, wherein said cooperating means includes a clamp having an open position and a closed position, said clamp adapted to receive the infusion set when placed in the open position and adapted to hold the infusion set in operating position with the infusion system when placed in the closed position.

34. The mechanism of claim 33, wherein said clamp includes spring-loaded fingers that engage and hold the infusion set in operating position with the infusion system.

35. The mechanism of claim 34, wherein said latch arm includes locking means responsive to said latch arm, said locking means causing said spring-loaded fingers to assume a locked configuration when said latch arm is in the closed position and to assume an unlocked configuration when said latch arm is in the open position.

36. A flow control system for an infusion system that operates to transfer fluid through a conduit to a patient, comprising:

an infusion segment having a slider with a first position and a second position, said slider allowing fluid flow when placed in the first position and stopping fluid flow when placed in the second position; and

a rotating actuator mounted on the infusion system for engaging the slider, said actuator including an engaging device configured to interface with the slider;

wherein as said actuator rotates said slider is alternatively placed in the first and second positions.

37. The flow control system of claim 36, wherein said segment includes a slot closed at one end for receiving the engaging device.

38. A method for controlling the infusion of a fluid to a patient through an infusion set having a pumping segment and a flow stop device in engagement with the infusion set, said flow stop device having a flow position allowing flow through the infusion set and a flow stop position at which the infusion set is occluded, said infusion set configured for engagement with a pumping device, said pumping device occluding the pumping segment when the pumping segment is in the operating position, the method comprising the steps of:

mounting the pumping segment to the pumping device;

moving a latch arm to a closed position;

wherein the step of moving the latch arm to the closed position comprises the steps of;

moving the pumping segment into the operating position with the pumping device so that the pumping device occludes the pumping segment, and thereafter;

moving the flow stop device to the flow position.

39. The method of claim 38 further comprising the steps of:

moving the latch arm to an open position;

wherein the step of moving the latch arm to the open position comprises the steps of;

moving the flow stop device to the flow stop position; and

thereafter

moving the pumping segment into a non-operating position with the pumping device so that the pumping device no longer occludes the pumping segment.

40. The method of claim 38 further comprising the step of engaging a portion of the infusion set adjacent the pumping segment with the latch arm when the latch arm is moved to the closed position to confine the infusion set to a predetermined position.

41. The method of claim 40 further comprising the step of disengaging the portion of the infusion set when the latch arm is moved to the open position to allow removal of the infusion set.

42. The method of claim 38 wherein the step of moving the latch arm to the closed position further comprises the step of rotating an air-in-line sensor into an operating position in relation to the infusion set.