Self-sealing subcutaneous injection site

• US 4,543,088 A
• Filed: 11/07/1983
• Issued: 09/24/1985
• Est. Priority Date: 11/07/1983
• Status: Expired due to Fees

• Current Assignee: Baxter International Inc.
• Original Assignee: American Hospital Supply Corp. (Baxter International Inc.)
• Inventors: Yamamoto, Ronald K., Bootman, Matthew W.
• Primary Examiner(s): Pellegrino, Stephen C.
• Application Number:
  US06/549,092
• Time in Patent Office: 687 Days
• Field of Search: 604/175, 604/8-10, 604/212, 604/93
• US Class Current: 604/288.02
• CPC Class Codes: A61M 2039/0072 Means for increasing tightness of the septum, e.g. compression rings, special materials, special constructions
• CPC Class Codes: A61M 2205/32 with radio-opaque indicia
• CPC Class Codes: A61M 39/0208 Subcutaneous access sites for injecting or removing fluids transcutaneous access sites A61M39/0247; implantable infusion devices A61M5/14276

Abstract

A self-sealing subcutaneous injection site for implantation in the body includes a housing having a bottom wall and a generally resilient dome-shaped wall which defines an interior chamber within the housing. The interior chamber has a durometer and shape for providing compressive forces within the dome-shaped wall for sealing punctures extending through the dome-shaped wall upon fluid pressurization of the interior chamber. A conduit extends through the dome-shaped wall into the interior chamber to provide a fluid-flow passageway to the chamber.

Claims

1. A self-sealing subcutaneous injection site comprising:

a housing having a bottom wall and a resilient, generally dome-shaped wall defining an interior chamber, which interior chamber has a convex upper wall formed by a portion of the dome-shaped wall for providing compressive forces within such upper wall for sealing punctures through the upper wall upon fluid pressurization of such interior chamber; and

a conduit extending through the dome-shaped wall into the interior chamber for providing a fluid-flow passageway to the interior chamber.

2. A self-sealing subcutaneous injection site as recited in claim 1 wherein the sidewall is constructed of a non-elongating resilient material.

3. A self-sealing subcutaneous injection site as recited in claim 1 wherein the interior chamber further comprises a convex-shaped chamber sidewall formed by a portion of the dome-shaped wall for providing compressive forces within the chamber sidewall for sealing punctures extending therethrough upon fluid pressurization of such chamber.

4. A self-sealing subcutaneous injection site as recited in claim 1 wherein the housing includes a generally flat upper, outer surface.

5. A self-sealing subcutaneous injection site as recited in claim 1 wherein the resilient dome-shaped wall comprises silicone elastomer.

6. A self-sealing subcutaneous injection site as recited in claim 1 wherein the housing is constructed of a silicone elastomer.

7. A self-sealing subcutaneous injection site as recited in claim 1 further comprising a needle guard extending along the bottom wall of the housing and at least partially positioned in the inner chamber.

8. A self-sealing subcutaneous injection site as recited in claim 1 wherein the bottom wall of the housing is constructed of a material impenetrable by a needle.

9. A self-sealing subcutaneous injection site as recited in claim 1 further comprising reinforcing cuff means extending around and imbedded in the resilient dome-shaped wall for reducing hoop strain in the resilient dome-shaped wall.

10. A self-sealing subcutaneous injection site as recited in claim 1 wherein the reinforcing cuff means comprises a Dacron mesh cuff.

11. A self-sealing subcutaneous injection site as recited in claim 1 further comprising a peripherally extending flange portion on the housing, which flange portion includes means for securing the housing within and to a patient.