Implantable injection body

• US 5,066,278 A
• Filed: 08/06/1990
• Issued: 11/19/1991
• Est. Priority Date: 08/09/1989
• Status: Expired due to Fees

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Svensson, Bengt, Hirschberg, Jakub
• Primary Examiner(s): Yasko, John D.
• Assistant Examiner(s): CERMAK, ADAM
• Application Number:
  US07/562,696
• Time in Patent Office: 470 Days
• Field of Search: 604/51, 604/244, 604/246, 604/270, 604/890.1, 604/263-268, 604/256
• US Class Current: 604/256
• CPC Class Codes: A61M 25/0045 multi-layered, e.g. coated coating materials A61L29/08
• CPC Class Codes: A61M 25/007 Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
• CPC Class Codes: A61M 5/14276 specially adapted for implantation

Abstract

An implantable injection body for the time-dependent dosable, long-term injection of a medication into a living being, the medication being stored in an implanted medication dosing device and being supplied by the latter to the injection body via a programmable pump arrangement. The injection body has a plurality of medication discharge openings, at least some of which are initially sealed, by a selectively openable seal, preferably by a dissolvable tissue-compatible, plastic material that dissolves at different times, so that, after closure of the initially unsealed discharge opening caused by overgrowth of connective tissue, agglomeration of matter, and/or the like, the initially sealed discharge openings can be selectively unsealed, preferably in serial fashion, to permit continued medication flow-through. Alternatively, the openable seals can comprise rupturable membranes of varying strengths.

Claims

1. An implantable injection body for long-term time dependent injection of a medication into a living being, the medication being stored in an implantable dosing device and operatively supplied to the injection body via a suitable pump arrangement, comprising:

two or more discharge openings in said injection body through which the medication is supplied into said living body; and

a dissolvable tissue-compatible seal material operatively initially sealing at least some of said discharge openings such that as said seal material dissolves, these initially sealed discharge openings become unsealed at different times.

2. The injection body of claim 1, wherein the discharge openings are positioned serially along a flow direction of the medication through the injection body.

3. The injection body of claim 2, wherein the discharge openings are positioned on opposite sides of the medication flow in two rows, one row of discharge openings being arranged in offset position relative to the other row of discharge openings.

4. The injection body of claim 1, wherein the injection body comprises an injection cannula operatively connected at a distal end of a catheter.

5. The injection body of claim 4, wherein one discharge opening is initially unsealed and is positioned at a distal end of the cannula.

6. The injection body of claim 1, wherein the injection body comprises an integral component of the dosing device such that said discharge openings comprise openings that extend through a housing of the dosing device.

7. The injection body of claim 1, wherein said seal material comprises a plastic synthetic.

8. The injection body of claim 7, wherein said seal material comprises a synthetic that dissolves due to biological influences within a time span defined by a thickness of a layer of the synthetic.

9. The injection body of claim 7, wherein said seal material comprises a synthetic that dissolves under a noninvasive influence such as a thermal or chemical influence.

10. The injection body of claim 1, wherein at least two of said initially sealed discharge openings are sealed by different thicknesses of said seal material.

11. The injection body of claim 1, wherein said injection body is provided with a paracentesis septum that is accessible from outside of said living being and into which a rinsing agent can be injected under a pressure sufficient to cause a sealed discharge opening to become unsealed.

12. The injection body of claim 1, wherein said discharge openings have different diameters.

13. The injection body of claim 1, wherein said injection body comprises a catheter that is coated by said seal material in tapered fashion such that a thickness of said seal material increases from a distal end of said catheter to a predetermined point along said catheter.

14. An injection body through which medication is discharged into a living being comprising a plurality of medication discharge openings through which the medication is supplied into the living being and a dissolvable, tissue compatible material operatively covering said body so that initially at least some of said discharge openings are sealed closed so that over time, said initially sealed discharge openings become unsealed at different times due to dissolving of said seal material to permit transmission of the medication therethrough.

15. The injection body of claim 14, wherein the seal material comprises a synthetic plastic.

16. The injection body of claim 14, wherein said initially sealed discharge openings are arranged serially along a flow direction of the medication.

17. The injection body of claim 14, wherein said seal material is applied in varying thicknesses to said discharge openings so that said discharge openings become unsealed at different points in time over the life of the injection body.

18. The implantable injection body of claim 14, wherein said seal material comprises a biogel.

19. The implantable injection body of claim 14, wherein said seal material comprises hydroxy butyrate.

20. The implantable injection body of claim 14, wherein said seal material comprises hydroxy venemate.

21. An implantable injection body operatively associated with a medication dosing device for long-term, time dependent discharge injection of medication into a living being, the medication being stored in the medication dosing device and being supplied to the injection body via a pump, the injection body comprising:

a distal end from which said medication is supplied to said living body;

a plurality of medication discharge openings in said distal end; and

a dissoluble tissue compatible seal material covering said body so as to initially seal all of said discharge openings except one.

22. A body through which a fluid is transmitted comprising a plurality of discharge openings in a wall of said body and a dissolvable seal material initially sealing at least some of said discharge openings, said initially sealed discharge openings being operative to become unsealed at different times over time as said seal material dissolves.

23. The body of claim 22, wherein said seal material is applied in different quantities to said discharge openings so that said initially sealed discharge openings are operative to become unsealed at different times.

24. An injection body for injecting medication into a living being, comprising a plurality of discharge openings in said body, at least some of said discharge openings initially being sealed by selectively openable seals, so that as an unsealed discharge opening becomes overgrown by connective tissue or plugged by agglomerated matter, said initially sealed openings can be selectively unsealed to permit continued injection of medication into said living being.

25. The injection body of claim 24, wherein said seals comprise thin membrane walls that can be selectively ruptured due to a pressure differential between an interior of said injection body and an exterior of said injection body.

26. The injection body of claim 24, wherein said seals comprise dissolvable tissue compatible material, a quantity of which determines when a particular discharge opening becomes unsealed.