Fluid delivery device refill access

Patent metadata

Field	Value
Publication number	US-10143796-B2
Application number	US-201113218007-A
Country	US
Kind code	B2
Filing date	Aug 25, 2011
Priority date	Aug 25, 2010
Publication date	Dec 4, 2018
Grant date	Dec 4, 2018

Abstract

A therapeutic fluid delivery system including, in various examples, a first reservoir configured to house a first therapeutic fluid, a second reservoir configured to house a second therapeutic fluid, and an inlet port configured to receive a fluid delivery needle is described. The inlet port is configured for fluid communication between the fluid delivery needle and the first reservoir, and the inlet port is further configured for fluid communication between the fluid delivery needle and the second reservoir.

First claim

The invention claimed is:

1. A therapeutic fluid delivery system comprising:
a first reservoir configured to house a first therapeutic fluid;
a second reservoir configured to house a second therapeutic fluid;
an inlet port configured to receive a first fluid delivery needle having a first diameter and a second fluid delivery needle having a second diameter less than the first diameter, wherein the inlet port comprises a first septum and a second septum, and
wherein the inlet port is configured for fluid communication between the first fluid delivery needle and the first reservoir when the first fluid delivery needle penetrates the first septum but not the second septum, and the inlet port is further configured for fluid communication between the second fluid delivery needle and the second reservoir when the second fluid delivery needle penetrates both the first septum and the second septum; and
wherein the inlet port exhibits a reduced cross-sectional area between the first septum and the second septum such that the second needle exhibiting the second diameter less than the first diameter can access both the first septum and the second septum, while the first needle exhibiting the first diameter can access the first septum but not the second septum.

2. The therapeutic fluid delivery system of claim 1 , wherein the inlet port is configured so the second fluid delivery needle penetrates the first septum before the second fluid delivery needle penetrates the second septum.

3. The therapeutic fluid delivery system of claim 1 , wherein the inlet port defines a fluid intake aperture interposed between the first septum and the second septum.

4. The therapeutic fluid delivery system of claim 1 , further comprising the first fluid delivery needle and the second fluid delivery needle.

5. The therapeutic fluid delivery system of claim 1 , wherein at least one of the first reservoir or the second reservoir is defined by a bellows.

6. The therapeutic fluid delivery system of claim 5 , wherein the bellows comprises a convolution constructed of an elastomer.

7. The therapeutic fluid delivery system of claim 1 , further comprising a propellant reservoir.

8. The therapeutic fluid delivery system of claim 1 , further comprising one or more sensors configured to detect when the second fluid delivery needle penetrates the first septum but not the second septum, and further detect when the second fluid delivery needle penetrates both the first septum and the second septum;
wherein, to detect when the second fluid delivery needle penetrates the first septum but not the second septum, and further detect when the second fluid delivery needle penetrates both the first septum and the second septum, the one or more sensors are configured to detect a characteristic that varies when the second fluid delivery needle penetrates the first septum but not the second septum, and further varies when the second fluid delivery needle penetrates both the first septum and the second septum, the system further comprising: a processor configured to determine that the second fluid delivery needle has penetrated the first septum but not the second septum based on the detected characteristic.

9. The therapeutic fluid delivery system of claim 8 , wherein the processor is configured to determine that the second fluid delivery needle has penetrated both the first septum and the second septum based on the detected characteristic.

10. The therapeutic fluid delivery system of claim 8 , wherein the characteristic is selected from the group consisting of pressure, current, voltage, and resistance.

11. The therapeutic fluid delivery system of claim 10 , wherein the characteristic is pressure, the one or more sensors comprise a first pressure sensor and a second pressure sensor, and the processor is configured to determine that the second fluid delivery needle has penetrated the first septum but not the second septum based on the pressure detected by the first pressure sensor, and further that the second fluid delivery needle has penetrated both the first septum and the second septum based on the pressure detected by the second pressure sensor.

12. The therapeutic fluid delivery system of claim 10 , wherein the characteristic is electrical resistance.

13. The therapeutic fluid delivery system of claim 12 , further comprising a wire mesh proximate to at least one of the first septum or the second septum, wherein the wire mesh is electrically connected to the one or more sensors.

14. The therapeutic fluid delivery system of claim 13 , wherein the wire mesh comprises a first wire mesh proximate to the first septum, and further comprising a second wire mesh proximate to the second septum.

15. The therapeutic fluid delivery system of claim 12 , further comprising a set of two or more stacked discs proximate to at least one of the first septum or the second septum, wherein each of the discs comprises a plurality of slots, wherein the slots in the respective discs are arranged at an angle to one another to form a plurality of apertures in the set of stacked discs, and wherein the set of stacked discs is electrically connected to the one or more sensors.

16. The therapeutic fluid delivery system of claim 15 , wherein the angle between the slots of the respective discs of the set of stacked discs is at least one of approximately 90 or approximately 120 degrees.

17. The therapeutic fluid delivery system of claim 15 , wherein the set of stacked discs comprises a first set of stacked discs proximate to the first septum, and further comprising a second set of stacked discs proximate to the second septum.

18. The therapeutic fluid delivery system of claim 8 , further comprising a programmer, wherein the processor is configured to cause the programmer to at least one of vibrate, issue an audible sound, display text, or display a visual graphic when at least one of the first septum but not the second septum is penetrated by the second fluid delivery needle or when both the first septum and the second septum are penetrated by the second fluid delivery needle.

19. The therapeutic fluid delivery system of claim 18 , wherein the processor is configured to cause the programmer to at least one of vibrate, issue an audible sound, display text, or display a visual graphic when at least one of the first fluid delivery needle and the second fluid delivery needle is withdrawn from at least one of the first septum or the second septum.

20. The therapeutic fluid delivery system of claim 1 , further comprising a valve interposed between a fluid delivery pump and the first and second reservoirs.

21. The therapeutic fluid delivery system of claim 20 , wherein the valve comprises a rotary valve.

22. The therapeutic fluid delivery system of claim 20 , wherein the valve comprises a first valve interposed between the first reservoir and the fluid delivery pump, and a second valve interposed between the second reservoir and the fluid delivery pump.

23. The therapeutic fluid delivery system of claim 22 , wherein the first valve is configured to actuate in response to instructions from a processor, and the second valve is a passive valve.

24. The therapeutic fluid delivery system of claim 23 , wherein the second valve is a check valve.

25. The therapeutic fluid delivery system of claim 24 , wherein a force required to open the check valve is less than or equal to approximately 2 pounds per square inch.

Assignees

• Haase James M
• Medtronic Inc

Inventors

• Haase James M

Classifications

• A61M5/168

  Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters {; Monitoring media flow to the body (flow control in general G05D7/00)} · CPC title

• A61M5/16813

  by controlling the degree of opening of the flow line · CPC title

• A61M2209/045

  for filling, e.g. for filling reservoirs · CPC title

• A61M5/14216 Primary

  Reciprocating piston type · CPC title

• A61M5/14276

  specially adapted for implantation · CPC title