PACEMAKER CATHETER

• US 3,568,660 A
• Filed: 11/20/1967
• Issued: 03/09/1971
• Est. Priority Date: 11/20/1967
• Status: Expired due to Term

• Current Assignee: Nelson A. Crites, Samuel P. Chambers
• Original Assignee: Nelson A. Crites, Samuel P. Chambers
• Inventors: Crites, Nelson A., Chambers, Samuel P.
• Application Number:
  US04/684,460
• Time in Patent Office: 1,205 Days
• US Class Current: 607/122
• 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 25/0012 with embedded structures, e.g. coils, braids, meshes, strands or radiopaque coils
• CPC Class Codes: A61M 25/0045 multi-layered, e.g. coated coating materials A61L29/08
• CPC Class Codes: A61M 25/005 with embedded materials for reinforcement, e.g. wires, coils, braids
• CPC Class Codes: A61M 25/0108 using radio-opaque or ultrasound markers
• CPC Class Codes: A61M 25/04 in the body, e.g. expansible A61M25/10, A61M16/0488 take precedence
• CPC Class Codes: A61N 1/056 Transvascular endocardial electrode systems
• CPC Class Codes: Y10T 29/49162 by using wire as conductive path
• CPC Class Codes: Y10T 29/49204 Contact or terminal manufacturing
• CPC Class Codes: Y10T 29/49885 with coating before or during assembling
• CPC Class Codes: Y10T 29/49888 Subsequently coating

Abstract

A multipurpose catheter and method of producing the same which involves applying a thin, first layer of rubber over the external surface of a selected length of flexible tubing, with the rubber being dissolved in a solvent and applied to the tubing in an atmosphere of the solvent, partially drying the first layer of rubber, helically winding at least two electrical conducting wires over the surface of the tubing and embedding the wires in the first layer of rubber, drying the first layer of rubber, extracting an end portion of each conductor from beneath the first coating near one end of the tubing and flat winding each end portion to form spaced electrode bases, providing a metal contact sleeve over each base to form electrodes, applying a thin second layer of rubber over the first layer in an atmosphere of the rubber solvent, drying the second layer of rubber, and connecting the opposite ends of the conductors to electrical jacks. A split needle is provided for use in inserting the catheter, the needle being thereafter withdrawn. For facilitating such withdrawal, the needle is constructed in two halves with a slidable cylindrical lock ring.

Claims

1. A catheter for insertion into the circulatory system comprising:

a. a flexible tubing having a central lumen;

b. a first coating of rubber on the outer surface of said tubing;

c. at least two conductors helically wound over said flexible tubing and embedded in said first coating of rubber;

d. a second coating of rubber overlying said first coating; and

e. an electrode connected to each said at least two conductors, each said electrode including a flat wound section of the corresponding conductor overlaid by and attached to a metallic sleeve with each said electrode spaced from one another and near one end of said tubing, the conductor ends opposite the electrodes being accessible for connection to electrical jacks.

2. A catheter according to claim 1 wherein said metallic sleeve comprises at least one layer of metal having characteristics resulting from having been electroplated over the flat wound section of the conductor.

3. A catheter for insertion into said circulatory system according to claim 1 wherein a woven Dacron sleeve is positioned between said first and second coatings of rubber.

4. A method of producing a catheter comprising:

a. applying a first coating of rubber to the outer surface of a base tubing in an atmosphere of rubber solvent;

b. helically winding at least two conductors into said first coating of rubber before the rubber has dried;

c. extracting an end portion of each of said conductors from beneath said first coating of rubber near one end of said base tubing and flat winding each of said end portions to form electrode bases;

d. attaching a metal sleeve over each said electrode base to form the outer surface of the electrode;

e. masking off the outer surface of the electrodes;

f. applying a second coating of rubber over said first coating of rubber in an atmosphere of rubber solvent;

g. attaching the end of said base tubing that is opposite from the end having said electrodes to a Luer-Lok and h. connecting said two conductors to electrical plug-in means.

5. A method of producing a catheter comprising;

a. straightening a base tubing by threading said base tubing onto a wire, applying tension to the ends of said base tubing and applying heated air to said base tubing;

b. applying a first coating of rubber to the outer surface of said base tubing in an atmosphere of rubber solvent;

c. helically winding at least two conductors into said first coating of rubber before the rubber has dried;

d. extracting an end portion of each of said conductors from beneath said first coating of rubber near one end of said base tubing and flat winding of each of said end portions to form electrode bases;

e. electroplating a metal sleeve over each said electrode base to form the outer surface of said electrode;

f. masking off the outer surface of the electrodes;

g. applying a second coating of rubber over said first coating of rubber in an atmosphere of rubber solvent;

h. attaching the end of said base tubing that is opposite from the end having said electrodes to a Luer-Lok and i. connecting said two conductors to electrical plug-in means.