# US 8,739,389 B2 · Compound barb medical device and method

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- Number: US 8,739,389 B2
- Document ID: US8739389B2
- Status: Granted
- Kind: B2
- Application number: 13/213,287
- Filed: 2011-08-19
- Published: 2011-12-15
- Granted: 2014-06-03
- Earliest claimed: 2008-02-20
- Assignees: Covidien LP
- Applicants: Matthew D. Cohen; Nicholas Maiorino; Timothy D. Kosa; Mark S. Buchter; Michael Primavera
- Inventors: Matthew D. Cohen; Nicholas Maiorino; Timothy D. Kosa; Mark S. Buchter; Michael Primavera
- Web page: https://patentgrep.com/patent/US8739389B2

## CPC

- A61B 17/06166: {Sutures (suture materials A61L17/00; manufacture of artificial threads D01D; treatment of threads D06M)}
- A61B 2017/00526: {Methods of manufacturing}
- A61B 2017/00893: {pharmaceutically effective}
- A61B 2017/06176: {with protrusions, e.g. barbs}
- Y10T 29/49996: Successive distinct removal operations
- Y10T 83/0341: Processes
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A compound barb medical device is provided which includes an elongated body having at least one barb formed along the length of the body, the barb defining an inner surface with a first portion disposed at a first orientation relative to a longitudinal axis of the elongated body, and a second portion disposed at a second orientation relative to the longitudinal axis. Optionally, the barb defines a third portion disposed at a third orientation relative to the longitudinal axis. A method for forming a compound barb on a medical device is also provided.

## Claims

### Claim 1

A method of forming a compound barb on a medical device, comprising the steps of:
applying ultrasonic energy to a cutting element of a barb cutting apparatus;
moving a medical device against the cutting element at an angle relative to a longitudinal axis of the medical device to form a compound barb on at least a portion of the medical device including:
forming a first cut in the medical device, the first cut having a first ratio of cut depth to diameter of the medical device; and
forming a second cut in the medical device, the second cut having a second ratio of cut depth to diameter of the medical device; and
varying a signal amplitude of the ultrasonic energy applied to the cutting element after forming the first cut to alter the second ratio of cut depth to diameter from the first ratio of cut depth to diameter.

### Claim 2 (depends on 1)

The method according to claim 1, further comprising the step of forming a third cut in the medical device, the third cut having a third ratio of cut depth to diameter of the medical device.

### Claim 3 (depends on 2)

The method according to claim 2, wherein the third ratio is approximately 15% to about 50%.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the first ratio is approximately 1% to about 40%.

### Claim 5 (depends on 1)

The method according to claim 1, wherein the second ratio is approximately 5% to about 50%.

### Claim 6 (depends on 1)

The method according to claim 1, wherein the medical device is a suture.

### Claim 7 (depends on 1)

A medical device having compound barbs formed by the method of claim 1.

### Claim 8 (depends on 1)

The method according to claim 1, wherein the medical device is a suture and has a needle attached to at least one end.

### Claim 9 (depends on 1)

The method of claim 1, further comprising placing the medical device on a motorized slide of the barb cutting apparatus, the motorized slide movable in X, Y, and Z planes and wherein moving a medical device against the cutting element includes moving the motorized slide towards the cutting element.

### Claim 10 (depends on 9)

The method of claim 9, further comprising moving the medical device after forming the compound barb a specified increment with an advance slide of the barb cutting apparatus and repeating the step of moving the medical device towards the cutting element to form a second compound barb.

### Claim 11 (depends on 1)

The method of claim 1, comprising moving the medical device after forming the compound barb in a circular manner with a rotational motor of the barb cutting apparatus and repeating the step of moving the medical device towards the cutting element to form a second compound barb.