IMPLANTABLE PROSTHETIC PASS-THROUGH DEVICE

• US 3,638,649 A
• Filed: 07/07/1969
• Issued: 02/01/1972
• Est. Priority Date: 07/07/1969
• Status: Expired due to Term

• Current Assignee: Neuromedics Incorporated
• Original Assignee: Robert A. Ersek
• Inventors: Ersek, Robert A.
• Primary Examiner(s): Truluck, Dalton L.
• Application Number:
  US04/839,297
• Time in Patent Office: 939 Days
• Field of Search: 128/348-351,214,214.4 138/177,178 15/104.3
• US Class Current: 604/8
• CPC Class Codes: A61L 29/06 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: A61M 1/3655 Arterio-venous shunts or fistulae
• CPC Class Codes: A61M 2039/0261 Means for anchoring port to the body, or ports having a special shape or being made of a specific material to allow easy implantation/integration in the body
• CPC Class Codes: A61M 39/0247 Semi-permanent or permanent transcutaneous or percutaneous access sites to the inside of the body peritoneal dialysis catheters A61M1/285; tracheostomy devices A61M16/0465; measuring pressure within the body A61B5/03; colostomy devices A61F5/445; gastrotomy feeding tubes A61J15/0015; means for fixing a feeding tube outside of the body A61J15/0053
• CPC Class Codes: C08L 83/04 Polysiloxanes

Abstract

An implantable through-the-skin prosthetic device for the permanent entry into the body for passage of liquid, conductors or the like. The device includes a roughened synthetic resinous member that courses through the skin and subcutaneous tissues and into the body. This special roughening promotes tissue ingrowth and thus effects a firm mechanical seal. Animal experimentation and clinical success imply that the seal is also dry and germproof. One form of such a device is an arteriovenous shunt for use in artificial dialysis. A roughened plastic cannula passes through the skin into the blood vessel itself. A ball joint fitting for connection to the external circuits allows for one-handed operation by a trained patient. A special reamer is provided for use with the shunt.

Claims

1. An implantable through-the-skin prosthetic cannula device for making a firm dry germproof mechanical seal, said device comprising:

A. a flexible inert nontoxic synthetic resinous tube of length and subcutaneous tissue of a living being, B. at least a portion of the length of said tube at least sufficient to extend through said cutaneous and subcutaneous tissue having a roughened outer surface, C. said roughened surface consisting of a plurality of integral closely spaced hairlike projecting fibers whereby tissue ingrowth into and among said projecting fibers is promoted when said tube is implanted into living body tissue.

2. A device according to claim 1 further characterized in that said synthetic resinous tube is formed from polytetrafluoroethylene resin.

3. A method of making a firm dry germproof mechanically sealed passage through the skin of a living being which comprises implanting a tubular device according to claim 1 extending through the cutaneous and subcutaneous tissue of a living being and maintaining therein by means of attachment between the body tissues and roughened surface of the tube.

4. An arteriovenous shunt comprising:

A. a pair of cannula segments according to claim 1, each having a roughened outer surface intermediate of their ends, B. a distal arterial segment and a distal venous segment, C. occlusion means connecting each of said distal segments with a cannula segment, and D. disengageable junction means between said distal segments.

5. An arteriovenous shunt according to claim 4 further characterized in that said junction means comprises a bulbous male member on one of said distal segments and a mating female socket member on the other of said distal segments.

6. An arteriovenous shunt according to claim 4 further characterized in that the outer surface of the tip of each of said cannula segments opposite from said occlusion means is smooth and tapered.

7. An arteriovenous shunt according to claim 4 further characterized in that:

A. said occlusion means comprises a length of flexible tubing extending telescopically over the ends of the cannula segments and distal segments connected thereby, B. the ends of said cannula segments and distal segments telescoped within the ends of the occlusion means are provided with a cuff of enlarged exterior diameter, and C. means are provided to secure the ends of said occlusion means to the ends of said cannula segments and distal segments spaced inwardly from said cuffs.

8. An arteriovenous shunt according to claim 4 further characterized in that said cannula segments and said distal segments are formed from polytetrafluoroethylene resin.

9. An arteriovenous shunt according to claim 4 further characterized in that said occlusion means is formed from silicone rubber tubing.

10. An arteriovenous shunt according to claim 5 further characterized in that:

A. said mating male and female members are relatively thin walled, B. said male member mates with a close sealing fit in said female member, and C. the open end of said female member is of diameter less than the outer diameter of the bulbous male member such that slight deformation of said members occurs during engagement and disengagement of the members.

11. An arteriovenous shunt comprising:

A. a semirigid tubular arterial cannula segment and a semirigid tubular venous cannula segment formed from polytetrafluoroethylene resin, B. a roughened outer surface composed of a plurality of closely spaced hairlike projecting fibers intermediate of the ends of each of said cannula segments, C. a smooth and tapered outer surface intravascular tip on each of said cannula segments, D. a distal arterial segment and a distal venous segment formed from polytetrafluoroethylene resin, E. tubular silicone rubber occlusion means extendinG telescopically over the ends of each of said respective cannula segments and distal segments connecting the same, and F. disengageable junction means between said distal segments comprising a bulbous male member on one of said segments and a mating female socket member on the other of said segments.