Patch-like infusion device

• US 20040138612A1
• Filed: 07/22/2003
• Published: 07/15/2004
• Est. Priority Date: 07/22/2002
• Status: Active Grant

• Current Assignee: Becton, Dickinson & Co
• Original Assignee: Becton, Dickinson & Co
• Inventors: Kuroda, Melody M.H., Smutney, Chad C., Kinsey, P. Spencer, Polidoro, John M., Sahi, Carl R., Powell, Kenneth G., Lastovich, Alexander G., Stipe, Daniel, Chapin, David S., Moss, Jeff M., Shermer, Charles D., Fentress, James K., Browka, Ed
• Granted Patent: US 7,250,037 B2
• Time in Patent Office: Days
• US Class Current: 604/93.01
• CPC Class Codes: A61M 2005/14252 with needle insertion means
• CPC Class Codes: A61M 2005/1426 with means for preventing access to the needle after use
• CPC Class Codes: A61M 2005/14268 with a reusable and a disposable component
• CPC Class Codes: A61M 2005/14506 mechanically driven, e.g. spring or clockwork
• CPC Class Codes: A61M 5/142 Pressure infusion, e.g. using pumps
• CPC Class Codes: A61M 5/14248 of the skin patch type
• CPC Class Codes: A61M 5/145 using pressurised reservoirs, e.g. pressurised by means of pistons
• CPC Class Codes: A61M 5/148 flexible, e.g. independent bagsA61M5/155 takes precedence

Abstract

A system and method for a patch-like, self-contained substance infusion device which provides one or more substantially hidden patient needles which can be placed in fluid communication with a fluid reservoir subassembly that includes a rigid bladder portion used in conjunction with a non-distensible bladder film, such as a metallized film. Simple removal of an interlock allows a disk, or Belleville spring assembly to apply an essentially even and constant pressure to the contents of the fluid reservoir assembly, and allows the device to then be attached to a skin surface via an adhesive contact surface. A push button activation assembly is provided which can then be used to release and seat one or more spring-loaded patient needles into the skin surface, and establish a fluid communication path between the patient needles and the pressurized fluid reservoir contents thereby delivering an infusion into the skin.

Claims

1. A patch-like infusion device, comprising:

a fluid reservoir having at least one flexible wall;

at least one patient needle in fluid communication with said reservoir;

a Belleville spring having a central aperture for applying pressure to said flexible wall to cause fluid to flow from said reservoir to said patient needle; and

a pin engageable with said central aperture and disengageable therefrom for causing said Belleville spring to begin applying said pressure when said infusion device is placed into operation.

2. A patch-like infusion device as claimed in claim 1, wherein disengagement of said pin from said aperture provides at least one of an audible indication and a tactile indication to a user of said infusion device.

3. A patch-like infusion device as claimed in claim 1, wherein disengagement of said pin from said aperture occurs automatically when the user performs another operation on said infusion device.

4. A patch-like infusion device as claimed in claim 3, wherein said operation comprises operating a pushbutton.

5. A patch-like infusion device as claimed in claim 3, wherein said operation comprises removing a pushbutton guard or interlock.

6. A patch-like infusion device, comprising:

a fluid reservoir having at least one flexible wall;

at least one patient needle in fluid communication with said reservoir;

a Belleville spring for applying pressure to said flexible wall to cause fluid to flow from said reservoir to said patient needle; and

means engageable with said Belleville spring and disengageable therefrom for causing said Belleville spring to begin applying said pressure when said infusion device is placed into operation.

7. A patch-like infusion device as claimed in claim 6, wherein said Belleville spring has a central aperture, and wherein said engageable means comprises a pin for engaging with and disengaging from said central aperture.

8. A patch-like infusion device as claimed in claim 6, wherein disengagement of said engageable means from said Belleville spring provides at least one of an audible indication and a tactile indication to a user of said infusion device.

9. A patch-like infusion device as claimed in claim 6, wherein disengagement of said engageable means from said Belleville spring occurs automatically when the user performs another operation on said infusion device.

10. A patch-like infusion device as claimed in claim 9, wherein said operation comprises operating a pushbutton.

11. A patch-like infusion device as claimed in claim 9, wherein said operation comprises removing a pushbutton guard or interlock.