# US 10,765,832 B2 · Medical tubing having variable characteristics and method of making same

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- Number: US 10,765,832 B2
- Document ID: US10765832B2
- Status: Granted
- Kind: B2
- Application number: 15/949,443
- Filed: 2018-04-10
- Published: 2018-08-09
- Granted: 2020-09-08
- Earliest claimed: 2004-01-28
- Assignees: Applied Medical Resources Corporation
- Applicants: Applied Medical Resources Corporation
- Inventors: John R. Brustad; Said S. Hilal; Nabil Hilal; Charles C. Hart; Gary M. Johnson; Serene Wachli; Ghassan Sakakine; Donald L. Gadberry; Edward D. Pingleton; Matthew N. Petrime; Payam Adlparvar; Carl B. Hadley; Kenneth K. Vu
- Web page: https://patentgrep.com/patent/US10765832B2

## CPC

- A61M 25/0012: {with embedded structures, e.g. coils, braids, meshes, strands or radiopaque coils}
- A61B 1/0011: {Manufacturing of endoscope parts}
- A61B 1/0055: {Constructional details of insertion parts, e.g. vertebral elements}
- A61B 17/3421: {Cannulas}
- A61M 25/0043: {characterised by structural features}
- A61B 2017/003: {Steerable}
- A61M 2025/0034: {characterized by elements which are assembled, connected or fused, e.g. splittable tubes, outer sheaths creating lumina or separate cores}
- A61M 2025/0037: {characterized by lumina being arranged side-by-side}
- A61M 2039/082: {Multi-lumen tubes}
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

The invention primarily is directed to a medical tubing adapted for insertion into a body tissue or cavity and method of manufacturing different variations of the tubing along a length of the tubing. The tubing comprises a plurality of individual, discrete, generally ring-shaped elements arranged in series and fused or bonded together forming a continuous tubular structure. The ring-shaped elements may include a combination of flexible and rigid ring-shaped elements assembled along different portions or sections of the tubular structure. In another aspect of the invention, the medical tubing may further comprise a secondary lumen and a pull wire to control the tubular structure. In another aspect of the invention, the ring-shaped elements may vary in diameter and/or composition in different portions or sections of the tubular structure.

## Claims

### Claim 1

A method of manufacturing a multi-lumen tube, comprising:
coating a first wire with a plastic material;
winding the coated first wire around a first mandrel, thereby forming a plurality of windings in a first wound coated wire;
coating a second wire with a plastic material;
winding the coated second wire around a second mandrel, thereby forming a plurality of windings in a second wound coated wire;
placing a compression sleeve over the second wound coated wire and the first wound coated wire to compress the second wound coated wire against the first wound coated wire prior to heating; and
heating the second wound coated wire and the first wound coated wire in the compression sleeve until the plastic material fuses the windings such that a second wire-reinforced tube is formed next to a first wire-reinforced tube as the multi-lumen tube.

### Claim 2 (depends on 1)

The method of claim 1, further comprising removing the compression sleeve after heating the second wound coated wire along with the first wound coated wire.

### Claim 3 (depends on 1)

The method of claim 1 wherein the wire-reinforced tube has a lumen and a diameter size different than a lumen and diameter size of the second wire-reinforced tube.

### Claim 4 (depends on 1)

The method of claim 1, wherein the plastic material comprises at least one of polyurethane, a thermoplastic or a thermoset.

### Claim 5 (depends on 1)

The method of claim 1, wherein at least one of the wires comprises at least one of a metallic material or a second plastic material.

### Claim 6 (depends on 1)

The method of claim 1, wherein at least one of the wires is coated with the plastic material in a coextrusion process.

### Claim 7 (depends on 1)

The method of claim 1, wherein at least one of the first wire-reinforced tube or the second wire-reinforced tube has a wall thickness of approximately 0.015 inches or less.

### Claim 8 (depends on 1)

The method of claim 1, wherein at least one of the first wire-reinforced tube or the second wire-reinforced tube has an inner diameter that ranges from approximately 0.026 inches to approximately 0.75 inches.

### Claim 9 (depends on 8)

The method of claim 8, wherein the tolerance on the inner diameter is on the order of approximately 0.001 inches or less.

### Claim 10 (depends on 1)

The method of claim 1, wherein the heating is effected until the plastic material is formed above, below and between all the windings.

### Claim 11 (depends on 10)

The method of claim 10 further comprising dipping the multi-lumen tube in a solvent-based solution forming an outer layer on the multi-lumen tube.