Alignment and attachment of a heat exchanger cartridge to a pump device

• US 7,896,834 B2
• Filed: 08/07/2007
• Issued: 03/01/2011
• Est. Priority Date: 03/17/2005
• Status: Active Grant

• Current Assignee: Smisson-Cartledge Biomedical LLC
• Original Assignee: Smisson-Cartledge Biomedical LLC
• Inventors: Cartledge, Richard G., Jaecklein, William J., Field, David C., Stafford, Roland T., Koltz, Michael L., Smisson, Hugh F. III, Lewis, Harvey A. Jr., Rainier, Bradford J.
• Primary Examiner(s): Mendez; Manuel A
• Application Number:
  US11/835,095
• Publication Number:
  US 20080146995A1
• Time in Patent Office: 1,302 Days
• Field of Search: 604 65- 67, 604/890.1, 604/131, 128/DIG.12, 128/DIG.13
• US Class Current: 604/67
• CPC Class Codes: A61M 1/0281 Apparatus for treatment of blood or blood constituents prior to transfusion, e.g. washing, filtering or thawing
• CPC Class Codes: A61M 2205/127 with provisions for heating or cooling
• CPC Class Codes: A61M 2206/10 Flow characteristics
• CPC Class Codes: A61M 2206/14 Static flow deviators in tubes disturbing laminar flow in tubes, e.g. archimedes screws
• CPC Class Codes: A61M 5/16831 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 Class Codes: A61M 5/172 electrical or electronic A61M5/16804, A61M5/16831 take precedence
• CPC Class Codes: A61M 5/36 with means for eliminating or preventing injection or infusion of air into body dialysis systems, blood oxygenators A61M1/14; haemofiltration equipment A61M1/34; automatic tube cut-off A61M39/281
• CPC Class Codes: A61M 5/365 Air detectors A61M5/1684 takes precedence; in extracorporeal blood circuits A61M1/3626
• CPC Class Codes: A61M 5/44 having means for cooling or heating the devices or media

Abstract

A pump system selectably controls the temperature, flow rate, flow volume, and flow pressure of a fluid being infused into a patient'"'"'s body. The pump system includes a cartridge and components that removably connect with a pump housing and corresponding components, providing simple attachment of the cartridge to the pump housing. The pump housing includes a pressure sensor, a bubble detector, and a temperature sensor on a first side of the pump housing, and an engaging actuator and a central controller. The cartridge includes on a first side a heat exchanger, a pressure receptor correspondingly aligned with the pressure sensor, and a detector interface correspondingly aligned with the bubble detector and temperature sensor. Upon aligning the cartridge with the pump housing and actuating the engaging actuator, the pressure receptor communicates with the pressure sensor and the detector interface aligns with the bubble detector and temperature sensor.

Claims

1. A pump system, comprising:

a. a pump housing comprising at least one pressure sensor, at east one bubble detector, and at least one temperature sensor on a first side of said pump housing, an engaging actuator, and a central controller; and

b. a cartridge removably connected to said first side of said pump housing comprising a heat exchanger, at least one pressure receptor correspondingly aligned with said at least one pressure sensor, at least one detector interface correspondingly aligned with said at least one bubble detector and said at least one temperature sensor on a first side of said cartridge;

wherein upon aligning said first side of said cartridge with said first side of said pump housing and actuating said engaging actuator to secure said cartridge to said pump housing, said at least one pressure receptor communicates with said at least one pressure sensor and said at least one detector interface aligns with said at least one bubble detector and said at least one temperature sensor.

2. The system in claim 1, wherein:

said cartridge further comprises an infusion tubing in communication with said at least one pressure receptor; and

said at least one pressure sensor transmits the pressure at least one point in said infusion tubing to said central controller.

3. The system in claim 1, wherein:

said at least one pressure sensor comprises a pressure sensing needle; and

said at least one pressure receptor comprises an orifice for receiving said at least one pressure sensor.

4. The system in claim 3, wherein:

said at least one pressure receptor further comprises a substantially rigid collar communicating with said first side of said cartridge and surrounding the exterior edges of said at least one pressure receptor;

said at least one pressure receptor comprises a pliable material forming a tight seal around said at least one pressure receptor; and

said rigid collar prevents deformation of said at least one pressure receptor when under pressure.

5. The system in claim 1, wherein at least one of said at least one pressure receptor or said at least one pressure sensor is lubricated to facilitate placement of said at least one pressure sensor with said at least one pressure receptor.

6. The system in claim 1, wherein:

said at least one pressure sensor comprises an inflow pressure sensor, a pump outflow pressure sensor, and a fluid outflow pressure sensor; and

said at least one pressure receptor comprises an inflow pressure receptor, a pump outflow pressure receptor, and a fluid outflow pressure receptor.

7. The system in claim 1, wherein:

said cartridge further comprises an infusion tubing;

said infusion tubing remains at least partially exposed at said least one detector interface;

said at least one bubble detector and said at least one temperature sensor align with said at least one detector interface and communicate with said infusion tubing; and

at least one of said at least one bubble detector or said at least one temperature sensor comprises one of an ultrasonic sensor or an optical sensor.

8. The system in claim 7, wherein:

said at least one detector interface comprises an aperture in said first side of said cartridge; and

said at least one bubble detector and said at least one temperature sensor extend through said at least one detector interface to communicate with said infusion tubing.

9. The system in claim 7, wherein:

said infusion tubing is exposed on said first side of said cartridge;

and said at least one detector interface comprises the portion of said infusion tubing that aligns with said at least one bubble detector and said at least one temperature sensor.

10. The system in claim 7, wherein:

said at least one bubble detector comprises an inflow bubble detector positioned to sense bubbles in said infusion tubing at a point after said infusion tubing enters into said cartridge and before said infusion tubing passes through a pumping mechanism, and comprises an outflow bubble detector positioned to sense bubbles in said infusion tubing at a point before infusing fluid to a patient; and

said at least one detector interface comprises a first detector interface aligning with said inflow bubble detector upon attachment of said cartridge to said pump housing, and comprises a second detector interface aligned with said outflow bubble detector upon attachment of said cartridge to said pump housing.

11. The system in claim 7, wherein:

said at least one bubble detector comprises a c-shaped clamp having substantially the same inner diameter as the outer diameter of said infusion tubing so as to engage said infusion tubing and;

at least one of said infusion tubing or said at least one bubble detector is lubricated at approximately the points at which said at least one bubble detector engages said infusion tubing to facilitate placement of said infusion tubing with said at least one bubble detector.

12. The system in claim 7, wherein at least one of said infusion tubing, said at least one bubble detector, or said at least one temperature sensor further comprises an energy transmitting material to facilitate sensor signal transmission.

13. The system of claim 7, wherein:

said at least one temperature sensor comprises an inflow fluid temperature sensor positioned to measure fluid temperature in said infusion tubing at a point after said infusion tubing enters into said cartridge and before said infusion tubing passes through a pumping mechanism, and comprises an outflow fluid temperature sensor positioned to measure fluid temperature in said infusion tubing at a point before infusing fluid to a patient; and

said at least one detector interface comprises a first detector interface aligning with said inflow fluid temperature sensors upon attachment of said cartridge to said pump housing, and comprises a second detector interface aligning with said outflow fluid temperature sensor upon attachment of said cartridge to said pump housing.

14. The system in claim 7, wherein:

said at least one temperature sensor comprises a c-shaped clamp having substantially the same inner diameter as the outer diameter of said infusion tubing so as to engage said infusion tubing and;

at least one of said infusion tubing or said at least one bubble detector is lubricated by a lubricant at approximately the points at which said at least one bubble detector engages said infusion tubing to facilitate placement of said infusion tubing with said at least one bubble detector.

15. The system in claim 1, wherein:

said cartridge further comprises a plurality of flow limiting interfaces, an infusion tubing, and an air output tubing;

said infusion tubing and said air output tubing remain at least partially exposed at said plurality of flow limiting interfaces;

said pump housing further comprises a plurality of flow limiting mechanisms extending from said first side of said pump housing;

each of said plurality of flow limiting mechanisms align with said plurality of flow limiting interfaces and align with one of said infusion tubing or said air output tubing upon attachment of said cartridge to said pump housing; and

each of said plurality of flow limiting mechanisms reversibly engage and compress said infusion tubing or said air output tubing when actuated so as to prevent the flow of fluid or air at the points of compression.

16. The system in claim 15, wherein:

said plurality of flow limiting interfaces comprise apertures in said first side of said cartridge; and

said plurality of flow limiting mechanisms extend through said plurality of flow limiting interfaces to reversibly engage with said infusion tubing and said air output tubing.

17. The system of claim 15, wherein:

said plurality of flow limiting mechanisms comprises a fluid outflow flow limiting mechanism positioned to prevent fluid from flowing out of an air-trap on said cartridge and to a patient, and comprises an air output flow limiting mechanism to prevent air from escaping said air-trap; and

said plurality of flow limiting interfaces comprises a first flow limiting interface aligning with said fluid outflow flow limiting mechanism and maintaining exposure of said infusion tubing upon attachment of said cartridge to said pump housing, and a comprises second flow limiting interface aligning with said air output flow limiting mechanism and maintaining exposure of said air output tubing upon attachment of said cartridge to said pump housing.

18. The system in claim 1, wherein:

said cartridge further comprises an air-trap comprising an air-trap intake port, a fluid output port, an air output port, and at least one fluid level sensor interface;

said pump housing further comprises at least one fluid level sensor; and

said at least one fluid level sensor aligns and communicates with said at least one fluid level sensor interface upon attachment of said cartridge to said pump housing.

19. The system in claim 18, wherein:

said at least one fluid level sensor interface comprises an energy transmitting material to facilitate sensor signal transmission; and

wherein said at least one fluid level sensor is one of an ultrasonic sensor, an optical sensor, or a thermal sensor.

20. The system in claim 18, wherein:

said at least one fluid level sensor interface comprises an upper level fluid level sensor interface and a lower level fluid sensor interface, wherein said lower level fluid interface is positioned at a point on said air trap distal to said upper level fluid sensor; and

said at least one fluid level sensor comprises an upper level fluid level sensor aligning and communicating with said upper level fluid sensor interface and a lower level fluid sensor aligning and communicating with said lower level fluid sensor interface.

21. The system in claim 1, wherein:

said pump housing further comprises at least one heat exchanger temperature sensor on said first side of said pump housing; and

said at least one heat exchanger temperature sensor aligns and communicates with said heat exchanger on said cartridge upon attachment of said cartridge to said pump housing.

22. The system in claim 21, wherein said heat exchanger temperature sensor comprises one of an infrared sensor, an optical sensor, or a thermistor.

23. The system in claim 1, further comprising:

at least one clamping mechanism extending from said pump housing; and

at least one attachment point on said cartridge;

wherein;

said at least one attachment point is configured to receive said at least one clamping mechanism; and

actuating said engaging actuator causes said at least one clamping mechanism to attach said cartridge to said pump housing.

24. The system in claim 23, wherein said at least one clamping mechanism comprises at least one bail and said at least one attachment point comprises at least one bracket.

25. The system in claim 23, wherein engaging said engaging actuator causes between about 100 pounds and about 500 pounds of compressive force to be distributed between said heat exchanger on said cartridge and a thermal element on said pump housing.

26. The system in claim 1, further comprising:

at least one guide pin extending from said pump housing; and

at least one correspondingly aligned guide receptor on said cartridge;

wherein said at least one guide receptor is configured to receive said at least one guide pin.

27. The system in claim 1, further comprising an install detector that communicates a signal to said central controller based at least in part on proper attachment of said cartridge.

28. The system in claim 1, further comprising at least one of a blood sensor or a flow sensor.

29. A pump system, comprising:

a. a pump housing comprising at least one sensing device on a first side; and

b. a cartridge removably connected to said first side of said pump housing comprising at least one detector interface correspondingly aligned with said at least one sensing device and an infusion tubing remaining at least partially exposed at said at least one detector interface;

wherein;

said at least one sensing device comprises a c-shaped clamp having substantially the same inner diameter as the outer diameter of said infusion tubing;

at least one of said infusion tubing or said at least one sensing device is lubricated at the points at which said at least one sensing device engages said infusion tubing to facilitate engaging said infusion tubing with said at least one sensing device; and

upon aligning said first side of said cartridge with said first side of said pump housing, said at least one sensing device aligns with said at least one detector interface and engages said infusion tubing.

30. The system in claim 29, wherein:

said at least one detector interface comprises an aperture in said first side of said cartridge; and

said at least one sensing device extends through said at least one detector interface to communicate with said infusion tubing.

31. The system in claim 29, wherein said infusion tubing is exposed on said first side of said cartridge and said at least one detector interface comprises the portion of said infusion tubing that aligns with said at least one sensing device.

32. The system in claim 29, wherein said at least one sensing device comprises at least one of a bubble detector or a temperature sensor.