Tissue holding devices and methods for making the same

• US 7,850,894 B2
• Filed: 05/02/2007
• Issued: 12/14/2010
• Est. Priority Date: 05/04/2006
• Status: Active Grant

• Current Assignee: Ethicon Incorporated (Johnson & Johnson)
• Original Assignee: Ethicon Incorporated (Johnson & Johnson)
• Inventors: Collier, John P., Lindh, David Sr., Nawrocki, Jesse G.
• Primary Examiner(s): Wollschlager; Jeffrey
• Application Number:
  US11/743,201
• Publication Number:
  US 20070257395A1
• Time in Patent Office: 1,322 Days
• Field of Search: None
• US Class Current: 264/320
• CPC Class Codes: A61B 17/06166 Sutures suture materials A61L17/00; manufacture of artificial threads D01D; treatment of threads D06M
• CPC Class Codes: A61B 2017/00526 Methods of manufacturing
• CPC Class Codes: A61B 2017/00867 shape memory effect for prostheses A61F2210/0014
• CPC Class Codes: A61B 2017/06176 with protrusions, e.g. barbs
• CPC Class Codes: B29C 2043/023 having a plurality of grooves
• CPC Class Codes: B29C 2043/148 using different moulds
• CPC Class Codes: B29C 2043/3615 Forming elements, e.g. mandrels or rams or stampers or pistons or plungers or punching devices
• CPC Class Codes: B29C 43/021 characterised by the shape of the surface
• CPC Class Codes: B29C 43/146 for making multilayered articles
• CPC Class Codes: Y10T 83/4516 Work-feed mechanism in nonfeed motion effects or initiates tool actuation
• CPC Class Codes: Y10T 83/6484 Punch or die station

Abstract

Various methods are provided for forming tissue holding devices having predetermined shapes suitable for use in surgical applications, and devices formed in accordance with such methods are also provided. These methods include press forming methods, and press forming methods in combination with profile punching. Tissue holding devices formed in accordance with such methods include various configurations for a core and a plurality of tissue holding elements extending outwardly from the core.

Claims

1. A method for forming a tissue holding device having a predetermined shape suitable for surgical applications comprising:

providing first and second female dies each having respective first and second top surfaces with first and second recesses formed therein, wherein the first and second recesses are sized and shaped such that, when aligned with one another, they together form a mold cavity defining the predetermined shape, wherein the predetermined shape includes a core extending along a length thereof between a first and a second end, and a plurality of tissue holding elements extending outwardly from the core to a distal end and in a direction toward said first end of the core;

providing a polymeric feedstock material comprised of a single, substantially uniform polymeric solid material;

placing the solid feedstock material between the top surfaces of the first and second dies;

with the solid feedstock material therebetween, pressing the top surfaces of the first and second dies together until the top surfaces of the first and second dies are substantially in contact with one another and the recesses of the first and second dies substantially aligned to form the mold cavity, so that the feedstock material deforms and fills the cavity therebetween to thereby form the tissue holding device having the predetermined shape,

wherein the pressing step is performed entirely at a temperature below a melting point of the feedstock material and

wherein the core has an outermost dimension less than or equal to 0.03 inches.

2. The method according to claim 1, wherein the plurality of tissue holding elements have a length less than or equal to 0.2 inches.

3. The method according to claim 1, wherein the plurality of tissue holding elements include a plurality of sets of first and second tissue holding elements, wherein for each set the first and second tissue holding elements are positioned substantially opposite one another at substantially the same location along the length of the core.

4. The method according to claim 1, wherein the first and second female dies are circular in shape, and wherein the first and second recesses therein are formed in respective outer circumferences thereof.