Implantable medication delivery device having needle receiving slot

• US 20060142705A1
• Filed: 10/20/2005
• Published: 06/29/2006
• Est. Priority Date: 04/24/2003
• Status: Abandoned Application

• Current Assignee: Infusion Systems, LLC
• Original Assignee: Infusion Systems, LLC
• Inventors: Halili, Edgardo Castro
• Application Number:
  US11/255,686
• Publication Number:
  US 20060142705A1
• Time in Patent Office: Days
• US Class Current: 604/288.10
• CPC Class Codes: A61M 2039/0081 Means for facilitating introduction of a needle in the septum, e.g. guides, special construction of septum
• CPC Class Codes: A61M 2039/0211 with multiple chambers in a single site
• CPC Class Codes: A61M 39/0208 Subcutaneous access sites for injecting or removing fluids transcutaneous access sites A61M39/0247; implantable infusion devices A61M5/14276
• CPC Class Codes: A61M 39/045 pre-slit to be pierced by blunt instrument
• CPC Class Codes: A61M 5/14276 specially adapted for implantation

Abstract

A medication delivery device having a housing including at least one needle receiving port comprising a septum and a needle entrance opening. The entrance opening in accordance with the invention comprises an elongate slot having a length L and a width W where L is significantly greater than W and where W is dimensioned to pass only needles smaller than a certain size.

Claims

1. An implantable medication delivery device comprising:

a housing defining an interior volume;

a needle receiving port in said housing for communicating with said interior volume;

said port comprising a septum and an entrance opening overlaying said septum;

said entrance opening comprising a slot having a length L and a width W where W is selected to prevent penetration by a needle larger than a certain size and where L is greater than four times W.

2. The device of claim 1 wherein said needle receiving port defines an oval shaped depression having a sloping peripheral wall converging downwardly toward said entrance opening.

3. The device of claim 1 including a reservoir mounted in said interior volume;

and wherein

said needle receiving port communicates with said reservoir for supplying medication thereto

4. The device of claim 1 further including an outlet port in said housing;

and wherein

said needle receiving port communicates with said outlet port.

5. An implantable medication delivery device comprising:

a housing defining an interior volume;

first and second reservoirs mounted in said interior volume;

said housing defining first and second needle receiving ports respectively coupled to said first and second reservoirs, each of said ports comprising a septum and an entrance opening overlaying said septum; and

wherein

at least one of said entrance openings comprises a slot having a length L and a width W where W is selected to prevent a needle larger than a certain size from penetrating the underlying septum.

6. The device of claim 5 wherein said needle receiving port having an entrance opening slot further includes:

an oval shaped depression having a sloping peripheral wall converging downwardly toward said slot.

7. The device of claim 5 further including an outlet port in said housing;

and

a metering flow path coupling each of said reservoirs to said outlet port.

8. An implantable medication delivery device comprising:

a medication reservoir;

an outlet port adapted for coupling to a catheter;

a flow path coupling said reservoir to said outlet port;

a first needle receiving port for receiving medication to fill said reservoir;

said first port comprising a septum and a first needle entrance opening overlaying said septum;

a second needle receiving port for extracting fluid from or introducing fluid to said outlet port;

said second port comprising a septum and a second needle entrance opening overlaying said septum; and

wherein

at least one of said first and second needle entrance openings comprises a slot having a length L and a width W where L is greater than four times W.

9. The device of claim 8 wherein said second entrance opening comprises a slot having a width W greater than 0.0205 inches for passing a 25 gauge needle and less than 0.0275 inches for rejecting a 22 gauge needle.

10. The device of claim 9 wherein said second inlet port further defines an oval shaped depression having a sloping peripheral wall converging downwardly toward said second opening slot.

11. The device of claim 8 wherein said first entrance opening is large enough to pass a 22 gauge needle.

12. An implantable medication delivery device comprising:

a medication reservoir;

a catheter outlet port;

a flow path coupling said reservoir to said catheter outlet port;

a first inlet port coupled to said reservoir;

said first inlet port comprising a septum and a first needle entrance opening overlaying said septum;

a second inlet port coupled to said catheter outlet port;

said second inlet port comprising a septum and a second needle entrance opening overlaying said septum;

said first needle entrance opening comprising a slot having a width W₁ greater than 0.0285 inches for passing a 22 gauge needle and a length L₁ greater than four times W₁; and

said second needle entrance opening comprising a slot having a width W₂ greater than 0.0205 inches for passing a 25 gauge needle and less than 0.0275 inches for rejecting a 22 gauge needle and a length L₂ greater than four times W₂.

14. The device of claim 12 wherein said first inlet port defines an oval shaped depression having a sloping peripheral wall converging toward said first needle entrance opening.

15. The device of claim 12 wherein said second inlet port defines an oval shaped depression having a sloping peripheral wall converging toward said second needle entrance opening.

13. The device of 12 wherein said first inlet port defines a first peripheral wall surface diverging outwardly from said first needle entrance opening slot;

and wherein

said second inlet port defines a second peripheral wall surface diverging outwardly from said second needle entrance opening slot.

16. A method of configuring a medication delivery device defining an interior volume comprising:

providing a needle receiving port for communicating with said interior volume; and

forming an entrance opening to said port comprising an elongate slot having a length L and a width W where W is selected to prevent penetration by a needle larger than a certain size and where L is considerably greater than W.

17. The method of claim 16 where L is greater than four times W.

18. The method of claim 16 wherein said elongate slot has a width W greater than 0.0205 inches for passing a 25 gauge needle and less than 0.0275 inches for rejecting a 22 gauge needle.

19. The method of claim 16 further including:

forming an oval shaped depression having a sloping peripheral wall converging toward said entrance opening.