MEDICAL PUMP WITH FIXED STROKE LENGTH

• US 20120197238A1
• Filed: 03/19/2012
• Published: 08/02/2012
• Est. Priority Date: 04/30/2009
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Whitehead, Nicholas R., Gray, John Michael, Haase, James M., Nelson Konen, Cynthia R., Hovind, Thomas W., Young, Dale A.
• Granted Patent: US 8,668,666 B2
• Time in Patent Office: Days
• US Class Current: 604/891.1
• CPC Class Codes: A61M 2205/52 with memories providing a history of measured variating parameters of apparatus or patient
• CPC Class Codes: A61M 2205/6018 providing set-up signals for the apparatus configuration
• CPC Class Codes: A61M 5/1413 Modular systems comprising interconnecting elements
• CPC Class Codes: A61M 5/14216 Reciprocating piston type
• CPC Class Codes: A61M 5/14276 specially adapted for implantation
• CPC Class Codes: A61M 5/16877 Adjusting flow; Devices for setting a flow rate
• CPC Class Codes: G16H 20/17 delivered via infusion or injection
• CPC Class Codes: G16H 40/63 for local operation

Abstract

A method comprises measuring a volume of fluid delivered per pump stroke for each of a plurality of substantially identical medical pumps. The substantially identical medical pumps each have a fixed stroke length. The method further comprises: storing indications of the measured volumes on one or more data storage mediums; and for each of the plurality of substantially identical medical pumps, generating a separate therapy control program based on the indication of the measured volume associated with that one of the plurality of substantially identical medical pumps.

Claims

1. A system comprising:

a medical pump, wherein the medical pump is one of a series of medical pumps manufactured according to the same design and specifications;

a memory storing data indicating a measured volume of fluid delivered during a test of the medical pump to associate the pump with measured volume;

a programmer including a user interface to receive a user input indicating a specified quantity of fluid to be transferred by the medical pump to a patient; and

a processor that generates a therapy control program for operating the medical pump based on the measured volume and the specified quantity of fluid to calibrate the therapy control program to the measured volume associated with the medical pump.

2. The system of claim 1, wherein the medical pump is included in an implantable medical device that also includes the memory.

3. The system of claim 1, wherein the medical pump is included in an implantable medical device that also includes the memory and the processor.

4. The system of claim 1, wherein the programmer includes the memory.

5. The system of claim 1, wherein the programmer includes the memory and the processor.

6. The system of claim 1, wherein the medical pump is configured to deliver a therapeutic fluid to a patient.

7. The system of claim 1,

wherein the medical pump has a fixed stroke length, and

wherein the indication of the measured volume associated with the medical pump is an indication of a volume of fluid delivered per pump stroke of the medical pump.

8. The system of claim 1, wherein the medical pump comprises:

a magnetic cup forming a recess, wherein the magnetic cup includes a protrusion within the recess, wherein the cup forms a central aperture through the protrusion;

a one-way valve that controls fluid flow within the central aperture;

an electromagnetic coil within the recess and circumscribing the protrusion;

a piston within the central aperture;

a magnetic pole attached to the piston; and

a cover enclosing the magnetic pole between an interior surface of the cover and the electromagnetic coil,

wherein the cover includes one or more fixed protrusions on the interior surface of the cover, and wherein the protrusions set a stroke length of the piston.

9. The system of claim 8, wherein the medical pump further comprises a barrier plate between the magnetic cup and the pole, wherein the barrier plate fluidically separates an interior of the cup from the external surface of the barrier plate.

10. The system of claim 9, wherein the medical pump further comprises:

a sleeve within the central aperture of the magnetic cup;

a band fixed to the magnetic cup and surrounding the recess;

a first seal between the sleeve and the barrier plate; and

a first seal between the band and the barrier plate.

11. The system of claim 8, wherein the medical pump further comprises a bulkhead that forms a cup-mounting bay, wherein the cup is mounted within the cup-mounting bay.

12. The system of claim 11, wherein the bulkhead forms a filter-mounting bay and a fluid passageway that connects the filter-mounting bay to the cup-mounting bay, the medical pump assembly further comprising a filter mounted within the filter-mounting bay.

13. The system of claim 8, wherein the cover includes a filter within an inlet flow path of the medical pump assembly.

14. A system comprising:

a medical pump, wherein the medical pump is one of a series of medical pumps manufactured according to the same design and specifications; and

a means for delivering a specified quantity of therapeutic fluid to a patient with the medical pump according to data indicating a measured volume of fluid delivered during a test of the medical pump.

15. A computer-readable data-storage medium comprising instructions that cause a programmable processor to:

access a user input indicating a specified quantity of fluid to be delivered to a target site within a patient by a medical pump, wherein the medical pump is one of a series of medical pumps manufactured according to the same design and specifications;

access data indicating a measured volume of fluid delivered during a test of the medical pump; and

generate a therapy control program for operating the medical pump based on the accessed user input and the accessed data to calibrate the therapy control program to the measured volume.

16. The computer-readable medium of claim 15, wherein the computer-readable medium comprises further instructions that cause the programmable processor to control the medical pump to deliver the specified quantity of therapeutic fluid to the target site within the patient according to the therapy control program calibrated to the measured volume.

17. The computer-readable medium of claim 15, wherein the computer-readable medium is a component of an implantable medical device (IMD) that includes the medical pump.

18. The computer-readable medium of claim 15, wherein the computer-readable medium is a component an external controller for an implantable medical device (IMD) that includes the medical pump.

19. The computer-readable medium of claim 15,

wherein the medical pump has a fixed stroke length, and

wherein controlling the medical pump to deliver the specified quantity comprises issuing one or more commands specifying a number of pump strokes corresponding to the specified quantity of therapeutic fluid.

20. The computer-readable medium of claim 15, wherein the computer-readable medium comprises further instructions that cause the programmable processor to:

for each of the medical pumps in the series of medical pumps manufactured according to the same design and specifications, access data indicating a measured volume of fluid delivered during a test of the medical pump; and

for each of the medical pumps in the series of medical pumps manufactured according to the same design and specifications, issue one or more commands that cause the medical pump to deliver a specified quantity of therapeutic fluid to a target site within a patient based on the accessed data.