Transcutaneous infusion system

• US 4,569,675 A
• Filed: 09/12/1983
• Issued: 02/11/1986
• Est. Priority Date: 09/12/1983
• Status: Expired due to Term

• Current Assignee: AngioDynamics, Inc., Rita Medical Systems Incorporated (AngioDynamics, Inc.)
• Original Assignee: Infusaid Corporation
• Inventors: Prosl, Frank R., Szymanski, Joseph J.
• Primary Examiner(s): PELLEGRINO, STEPHEN C
• Application Number:
  US06/531,038
• Time in Patent Office: 883 Days
• Field of Search: 604/175, 604/174, 604/179, 604/93, 604/280, 604/164, 604/283, 128/DIG. 26
• US Class Current: 604/175
• CPC Class Codes: A61M 2005/1581 Right-angle needle-type devices
• 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 39/0208 Subcutaneous access sites for injecting or removing fluids transcutaneous access sites A61M39/0247; implantable infusion devices A61M5/14276
• CPC Class Codes: Y10S 128/26 Cannula supporters

Abstract

A transcutaneous infusion system comprises an implantable infusate injection port for conducting infusate from the port to an infusion site in the body. The port is supplied with infusate through a penetrable septum located directly under the skin. To infuse the patient, a flexible injection cannula encircling a needle which is slightly longer than the cannula is inserted through the septum into the port and then the needle is withdrawn leaving the free end of the flexible cannula in the port. The opposite end of the cannula is provided with a fitting for connecting the cannula to the outlet of a fluid administration set. The system also includes a bracket removably connected to the cannula and taped to the patient adjacent the injection site so that the bracket anchors the cannula and its associated fittings and tubing against the patient'"'"'s skin, while assuring that the cannula is not bent to an extent that will stop fluid flow into the port.

Claims

1. A transcutaneous infusion system comprising

A. an implantable infusate injection port including a housing and having a self-sealing injection septum leading into the port and an outlet tube leading from the port, said injection port being arranged to be implanted in a human or animal body with the septum located directly under the skin and the outlet tube leading to an infusion site in the body;

B. an injection set including a flexible injection cannula and a fitting at one end of the cannula, the opposite end of the cannula being insertable through said septum into the port; and

C. a cannula retaining bracket having opposite end segments which are generally perpendicular to one another and an intermediate segment which makes a curved transition between said two end segments, all of said segments lying in a common first plane, and tab means integral with said retaining means and extending in a second plane perpendicular to said first plane and having a flat undersurface so that, when the bracket is positioned with its tab means undersurface flush against the skin surface with said one end segment located adjacent to the injection site, the bracket retains said cannula in a gentle more or less right-angle bend with the cannula fitting held close to the skin surface.

2. The infusion system defined in claim 1 and further including means for adhering the tab means to the skin surface.

3. The system defined in claim 1 wherein said injection port also includes

A. a tubular sealing member including a stem whose diameter is selected to engage snugly in the end of said outlet tube;

and

B. means for releasably connecting said sealing member to said housing in fluid connection with said port so that different diameter outlet tubes may be connected selectively to the port by appropriate selection of the sealing member stem diameter.