CATHETER APPARATUS

• US 3,659,588 A
• Filed: 04/08/1970
• Issued: 05/02/1972
• Est. Priority Date: 04/08/1970
• Status: Expired due to Term

• Current Assignee: Alan R. Kahn, Florence A. Stroebel
• Original Assignee: Alan R. Kahn, Florence A. Stroebel
• Inventors: Kahn, Alan R., Stroebel, Florence A.
• Primary Examiner(s): Truluck, Dalton L.
• Application Number:
  US05/026,697
• Time in Patent Office: 755 Days
• Field of Search: 128/2.5R,2.5D,2.6R,2.6E,2,348-351 138/118 317/2R
• US Class Current: 600/301
• CPC Class Codes: A61B 5/0215 by means inserted into the body catheters A61M25/00
• CPC Class Codes: A61B 5/276 Protection against electrode failure
• CPC Class Codes: A61B 5/283 Invasive
• CPC Class Codes: A61M 25/00 Catheters; Hollow probes dilators A61M29/00; peritoneal catheters A61M1/285; tracheal tubes A61M16/04; for drainage A61M27/00; for uterus, vagina or rectum A61M31/00 ; for measuring or testing A61B; materials for catheters A61L29/00
• CPC Class Codes: A61M 25/0009 Making of catheters or other medical or surgical tubes
• CPC Class Codes: A61M 25/005 with embedded materials for reinforcement, e.g. wires, coils, braids
• CPC Class Codes: A61N 1/056 Transvascular endocardial electrode systems
• CPC Class Codes: Y10S 128/908 Patient protection from electric shock

Abstract

A catheter having walls of which at least a portion is electrically conductive and has an electrical resistivity approximately equal to the electrical resistivity of blood.

Claims

1. Catheter apparatus comprising tubular means having walls, at least a portion of said walls being electrically conductive and having an electrical resistivity of approximately from 12 ohmcentimeters to 1,200 ohm-centimeters.

2. The apparatus of claim 1 in which all of said walls are electrically conductive and have an electrical resistivity of approximately from 12 ohm-centimeters to 1,200 ohm-centimeters.

3. The apparatus of claim 1 in which the electrical resistivity of said portion of said walls is approximately equal to the electrical resistivity of blood.

4. The apparatus of Claim 3 in which the electrical resistivity of said portion of said walls is approximately from one-tenth to 10 times the electrical resistivity of blood.

5. The apparatus of claim 1 in which said portion of said walls comprises a part of said walls adapted to be adjacent to the skin of an animal during intracorporeal application of said catheter apparatus.

6. The apparatus of claim 1 in which said portion of said walls is electrically semiconductive.

7. Improved catheter apparatus comprising:

tubular means defining a lumen for the passage of fluids into an animal'"'"''"'"'s body; and

said means being electrically semiconductive and having a substantially uniform electrical resistivity selected in the range from approximately 12 ohm-centimeters to 1,200 ohm-centimeters.