Systems, devices and methods of making surgical sutures having reformed, reduced diameter tips

Patent metadata

Field	Value
Publication number	US-11224421-B2
Application number	US-201816203113-A
Country	US
Kind code	B2
Filing date	Nov 28, 2018
Priority date	Nov 28, 2018
Publication date	Jan 18, 2022
Grant date	Jan 18, 2022

Abstract

A method of making a surgical suture having a reformed tip includes providing an elongated fiber having a first end, a second end, a central axis extending between the first and second ends thereof, and an outer surface that defines a cross-sectional dimension of the elongated fiber, and compressing a center region of the elongated fiber that is located between the first and second ends thereof for reshaping the center region into a core mass and a deformed mass that extends laterally outside the cross-sectional dimension of said elongated fiber. The method includes separating the deformed mass of the center region from the core mass of the center region so that only the core mass remains for interconnecting the first and second ends of the elongated fiber, and after separating the deformed mass from the core mass, reshaping the core mass into a reformed mass having a reformed mass central axis that is offset from the central axis of the elongated fiber.

First claim

What is claimed is:

1. A method of making a surgical suture having a reformed tip comprising:
providing an elongated fiber having a first end, a second end, a central axis extending between the first and second ends thereof, and an outer surface that defines a cross-sectional dimension of said elongated fiber;
compressing a center region of said elongated fiber that is located between the first and second ends thereof for reshaping the center region into a core mass and a deformed mass that extends laterally outside the cross-sectional dimension of said elongated fiber;
separating said deformed mass of the center region from said core mass of the center region so that only said core mass remains for interconnecting the first and second ends of said elongated fiber;
after separating said deformed mass from said core mass, reshaping said core mass into a reformed mass having a reformed mass central axis that is offset from the central axis of said elongated fiber.

2. The method as claimed in claim 1 , wherein the compressing the center region of said elongated fiber comprises using a die for compressing at least two sides of the outer surface of said elongated fiber.

3. The method as claimed in claim 2 , wherein the using the die for compressing at least two sides of said elongated fiber comprises:
providing a receiver die having a top surface and an elongated channel formed in the top surface;
providing an upper die having a bottom surface that opposes the top surface of said receiver die;
with the bottom surface of said upper die spaced away from the top surface of said receiver die, positioning the center region of said elongated fiber within said elongated channel of said receiver die;
moving the bottom surface of said upper die into contact with the top surface of said receiver die for compressing the center region of said elongated fiber between said upper die and said receiver die.

4. The method as claimed in claim 3 , wherein the separating said deformed mass step comprises cutting said deformed mass from said core mass.

5. The method as claimed in claim 4 , wherein the cutting said deformed mass from said core mass comprises using a cutting element having a sharpened cutting blade for cutting said deformed mass from said core mass.

6. The method as claimed in claim 4 , wherein the reshaping said core mass comprises:
after the cutting said deformed mass from said core mass, moving said upper die away from said receiver die to provide a gap between the bottom surface of said upper die and the top surface of said receiver die;
advancing first and second reforming dies into the gap between the bottom surface of said upper die and the top surface of said receiver die to engage said core mass for reshaping said core mass from a post-cut shape to a reformed shape that is different than the post-cut shape.

7. The method as claimed in claim 6 , wherein said first reforming die comprises a first J-shaped structure including a first concave curved surface, and wherein said second reforming die comprises a second J-shaped structure including a second concave curved surface.

8. The method as claimed in claim 1 , wherein the compressing the center region of said elongated fiber comprises using a die for constraining at least three sides of the center region of said elongated fiber for forming said core mass while not constraining one side of said elongated fiber for forming said deformed mass.

9. The method as claimed in claim 1 , further comprising heating said elongated fiber.

10. The method as claimed in claim 1 , wherein said elongated fiber comprises a biocompatible polymer.

Assignees

• Ethicon Inc

Inventors

• Rousseau Robert A

Classifications

• A61B17/06195 Primary

  Apparatus or means for preparing the cut end of the suture thread to be attached to the needle, e.g. tipping to prevent brooming (A61B17/06004 takes precedence) · CPC title

• B29L2031/753

  Medical equipment; Accessories therefor (bloodbags, medical bags B29L2031/7148; artificial eyes B29L2011/0008) · CPC title

• A61B17/06166

  Sutures (suture materials A61L17/00; manufacture of artificial threads D01D; treatment of threads D06M) · CPC title

• B29C43/52

  Heating or cooling · CPC title

• B29C2793/0027

  Cutting off · CPC title