Device for tissue injection

• US 20080091149A1
• Filed: 10/13/2006
• Published: 04/17/2008
• Est. Priority Date: 10/13/2006
• Status: Active Grant

• Current Assignee: Michael D. Laufer
• Original Assignee: Michael D. Laufer
• Inventors: Laufer, Michael D.
• Granted Patent: US 8,870,821 B2
• Time in Patent Office: Days
• US Class Current: 604/246
• CPC Class Codes: A61M 37/00 Other apparatus for introducing media into the body for reproduction or fertilisation A61B17/425; apparatus for iontophoresis or cataphoresis A61N1/30; Percutany, i.e. introducing medicines into the body by diffusion through the skin salt baths A61H33/04

Abstract

A system for administering an injection is described. The invention consists of an adhesive patch with an integrated injector that controllably insets an injection needle and delivers the medication contained within the patch. Variations of the system may also subsequently and automatically retracts the needle, rendering the patch safely inert. In additional variations, a portion of the system may remain on the patient and function as a bandage.

Claims

1. A method of injecting a substance into tissue comprising:

affixing an injection system onto a surface of the tissue;

positioning a portion of the injection system to prepare the injection system for deployment;

adding an agent to the injection system where the agent causes a build in pressure to automatically drive a needle through tissue and inject the substance.

2. The method of claim 1, where affixing-the injection system onto the surface of tissue comprises exposing an adhesive on an exterior surface of the system and placing the adhesive onto the surface of tissue.

3. The method of claim 2, further comprising an agent located on an exterior of the injection system.

4. The method of claim 3, where the agent is selected from a group consisting of an antiseptic agent, an anesthetic agent, a clotting agent, and a combination of agents.

5. The method of claim 3, where the agent is located on the portion of the surface of the system having the adhesive.

6. The method of claim 1, where adding the agent to the injection system comprises building pressure to drive the needle prior to injecting the substance.

7. The method of claim 1, where positioning the portion of the injection system comprises moving the injection system perpendicular to the tissue.

8. The method of claim 1, where positioning the portion of the injection system comprises laying the injection system flat against the tissue.

9. The method of claim 1, further comprising venting the system to retract the needle from the tissue.

10. The method of claim 9, where venting the system creates an audible signal.

11. A system for delivering an injection into tissue, the system comprising:

a body having an exterior surface, the body containing a first and a second chamber;

the first chamber comprising a needle affixed to a first piston, where the needle and first piston are slidably located in the first chamber;

a second chamber containing a therapeutic substance, where the therapeutic substance is in fluid communication with the needle;

a first port in fluid communication with the first chamber and second chamber, where a body of the first portion blocks the first port;

a pressure generating compound located within at least the first chamber, such that upon generating pressure, the pressure drives the first piston and needle out of the body and into tissue and subsequently causes movement of the therapeutic substance through the needle; and

an adhesive located on the exterior surface.

12. The system of claim 11, further comprising a second piston where upon generating pressure, the pressure drives the second piston against the therapeutic substance to deliver the substance through the needle.

13. The system of claim 12, where the body comprises an exhaust port, and where the second piston comprises a venting port in fluid communication with at least the second chamber, such that when the venting port is moved in fluid communication with the exhaust port, the venting port and exhaust port exhausts the pressure from within the body.

14. The system of claim 13, further comprising an audible noise generator configured to generate an audible noise as gas exhausts from the exhaust port.

15. The system of claim 11, further comprising a spring mechanism coupled to the first piston such that upon the generation of pressure, the spring resists movement of the first piston and upon decrease in pressure, the spring retracts the first piston and needle.

16. The system of claim 15, where the spring comprises a compression spring.

17. The system of claim 15, where the spring comprises a compression spring.

18. The system of claim 11, further comprising an agent located on an exterior of the injection system.

19. The system of claim 18, where the agent is selected from a group consisting of an antiseptic agent, an anesthetic agent, a clotting agent, and a combination of agents.

20. The system of claim 11, further comprising a seal and where the needle is driven through the seal when exiting the body.

21. The system of claim 20, where the needle is curved.

22. The system of claim 11, where the gas generation compound comprises sodium bicarbonate.

23. The system of claim 22, further comprising an activator compound to activate the gas generation compound.

24. The system of claim 23, where the activator compound comprises an acetic acid solution.