# US 11,896,207 B2 · Method for making braided medical devices

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- Number: US 11,896,207 B2
- Document ID: US11896207B2
- Status: Granted
- Kind: B2
- Application number: 17/217,779
- Filed: 2021-03-30
- Published: 2021-10-07
- Granted: 2024-02-13
- Earliest claimed: 2020-04-02
- Assignees: KA Medical, LLC
- Applicants: KA Medical, LLC
- Inventors: Pat Russo; Bill Riewer; John Oslund
- Web page: https://patentgrep.com/patent/US11896207B2

## CPC

- D04C 3/48: Auxiliary devices
- A61B 17/0057: {Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect (sutures A61B17/04; closing rectum or urethra near body surface A61F2/0009)}
- B21F 45/008: {of medical instruments, e.g. stents or corneal rings}
- D04C 1/06: Braid or lace serving particular purposes
- A61B 2017/00526: {Methods of manufacturing}
- A61B 2017/00575: {for closure at remote site, e.g. closing atrial septum defects}
- A61B 2017/00592: {Elastic or resilient implements}
- A61B 2017/00606: {Implements H-shaped in cross-section, i.e. with occluders on both sides of the opening}
- A61B 2017/00867: {shape memory effect}
- A61B 2090/037: {with a frangible part, e.g. by reduced diameter}
- D10B 2101/20: Metallic fibres
- D10B 2401/046: Shape recovering or form memory
- D10B 2509/08: Hernia repair mesh
- D04C: BRAIDING OR MANUFACTURE OF LACE, INCLUDING BOBBIN-NET OR CARBONISED LACE; BRAIDING MACHINES; BRAID; LACE (machines for making soles from strips of material A43D29/00; cane working B27J1/00)
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- B21F: WORKING OR PROCESSING OF METAL WIRE (rolling of metal wire B21B1/16; by drawing, auxiliary operations used in connection with metal-working without essentially removing material B21C)
- D10B: INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES

## Abstract

A method for making a braided medical device may involve positioning an insert inside a braided material, processing the braided material to form the braided medical device, dissolving and/or crushing the insert into multiple pieces, and removing the multiple pieces from the braided medical device. In some embodiments, the insert is made of gypsum. A braided medical device for occluding a defect in a heart may include a right disc for residing in a right side of the heart, a left disc having a partially circular shape for residing in a left side of the heart, and a waist extending between the right disc and the left disc and having a smaller diameter than that of either the right disc or the left disc.

## Claims

### Claim 1

A method for making a braided medical device, the method comprising:
positioning a first frangible insert inside a first length of the braided structure, wherein the first length is configured to become an inner layer of the braided medical device;
positioning a second frangible insert over the first length of the braided structure;
placing a second length of the braided structure over the second frangible insert, wherein the second length is configured to become an outer layer of the braided medical device; and
processing the braided structure to form the braided medical device; and
removing the first frangible insert and the second frangible insert from the braided medical device.

### Claim 2 (depends on 1)

The method of claim 1, wherein the first frangible insert and the second frangible insert comprise gypsum.

### Claim 3 (depends on 1)

The method of claim 1, wherein positioning the second frangible insert over the first length of the braided structure comprises positioning the second frangible insert over the first frangible insert, wherein the first length of the braided structure is disposed between the first frangible insert and the second frangible insert.

### Claim 4 (depends on 1)

The method of claim 1, wherein the first length of the braided structure is stiffer than the second length of the braided structure.

### Claim 5 (depends on 1)

The method of claim 1, wherein processing the braided structure comprises:
loading the braided structure into a forming mold;
heating the forming mold to a temperature high enough to affect a phase transformation in a material of the braided structure and calcination of the first frangible insert and the second frangible insert; and
quenching the forming mold.

### Claim 6 (depends on 1)

The method of claim 1, wherein removing the first frangible insert and the second frangible insert comprises crushing the first frangible insert and the second frangible insert into multiple pieces and washing the multiple pieces out of the braided medical device with water.

### Claim 7 (depends on 1)

The method of claim 1, wherein removing the frangible insert comprises dissolving the first frangible insert and the second frangible insert with water.

### Claim 8 (depends on 1)

The method of claim 1, further comprising sewing a fabric onto the braided medical device.

### Claim 9 (depends on 1)

The method of claim 1, wherein the braided medical device comprises a closure device for a heart defect.