Implantable apparatus

• US 5,336,194 A
• Filed: 07/27/1993
• Issued: 08/09/1994
• Est. Priority Date: 08/01/1992
• Status: Expired due to Term

• Current Assignee: Palyon Medical Corporation
• Original Assignee: Fresenius AG (Fresenius SE & Co. KGaA)
• Inventors: Steinbach, Bernd, Polaschegg, Hans-Dietrich
• Primary Examiner(s): WEISS, JOHN
• Application Number:
  US08/097,673
• Time in Patent Office: 378 Days
• Field of Search: 604/132, 604/891.1, 604/890.1, 604/131, 604/175
• US Class Current: 604/175
• CPC Class Codes: A61M 2039/0211 with multiple chambers in a single site
• CPC Class Codes: A61M 2039/0241 having means for filtering
• 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: A61M 5/165 Filtering accessories, e.g. blood filters, filters for infusion liquids A61M1/14 , A61M1/34, A61M1/3627, A61M1/3679, A61M1/3687 take precedence; needle sets with incorporated air inlet filters A61M5/162

Abstract

Implantable infusion apparatus comprising a chamber sealed by a septum and having an outlet aperture leading therefrom, to which a catheter tube is connected. A wire anchored in the chamber base projects into the catheter lumen, forming a ring slot whose diameter is smaller than the average size of a punched out particle. The wire thus serves as a particle retention means.

Claims

1. Implantable apparatus for dosed administration of liquid medicines in the human body, with a housing having at least one chamber for storing a liquid medicine defined by at least one wall, an inlet aperture in the housing sealed by a perfortable spectum and flow-connected to said chamber, and an outlet aperture in the housing connected to a catheter tube with a lumen and with particle retention means disposed in the area of the outlet aperture, wherein said particle retention means comprises a wire anchored in the chamber wall and projecting into said outlet aperture to form a ring slot in order to restrict the diameter of said outlet aperture.

2. Apparatus according to claim 1 wherein the diameter of the ring is smaller than the average diameter of a particle.

3. Implantable apparatus for dosed administration of liquid medicines in the human body, with a housing having at least one chamber for storing a liquid medicine defined by at least one wall, an inlet aperture in the housing sealed by a perfortable spectum and flow connected to said chamber, and an outlet aperture in the housing connected to a catheter tube with a lumen and with particle retention means disposed in the area of the outlet aperture, wherein said particle retention means comprises a capillary anchored in the chamber wall and projecting into said outlet aperture to form a ring slot in order to restrict the diameter of said outlet aperture.

4. Apparatus according to claim 3 wherein the diameter of the ring slot is smaller than the average diameter of a particle.