System and method for fabricating custom medical implant devices

Patent metadata

Field	Value
Publication number	US-10285829-B2
Application number	US-201514709773-A
Country	US
Kind code	B2
Filing date	May 12, 2015
Priority date	May 12, 2014
Publication date	May 14, 2019
Grant date	May 14, 2019

Abstract

A method for creating tubular inserts is useful for creating custom fitted inserts that correspond to the anatomy of a patient and solve the problem of pressure points, wear of the implant, damage to surrounding tissue, and denting. Surface measurements of the affected portion of a patient's internal cavity are obtained. Those measurements are used to design a core. The core is 3D printed with a soluble material. The core is wrapped with a thin filament or film such that the contours from the core develop on the outer surface of the covering. The covering is hardened and the core is dissolved away, leaving a custom-made implant device that can be deposited in the patient's cavity.

First claim

What is claimed is:

1. A method for creating a tubular insert comprising:
obtaining surface measurements for an internal surface of a portion of a patient;
using the surface measurements to create a core design having non-uniform surfaces;
3D printing a porous core with a water soluble sugar from the core design;
wrapping a thermoplastic filament multiple times around a circumference of the porous core in a first helical direction and a second helical direction that is opposite the first helical direction wherein the second helical direction forms an overlapped pattern with the first helical direction and a plurality of fused overlap points are formed where the second helical direction crosses over the first helical direction;
hardening the filament to create a tubular insert;
placing the porous core in water to dissolve at least a portion of the porous core; and
separating the tubular insert from the porous core.

2. The method of claim 1 wherein the internal surface is within a trachea of the patient, further comprising:
compressing the tubular insert to reduce an outer diameter of the tubular insert;
inserting the tubular insert into the trachea; and
allowing the tubular insert to expand and compress against the inner surface of the trachea.

3. The method of claim 1 wherein the internal surface is within an artery of the patient, further comprising:
compressing the tubular insert to reduce an outer diameter of the tubular insert;
inserting the tubular insert into the artery; and
allowing the tubular insert to expand and compress against the inner surface of the artery.

4. The method of claim 1 further comprising:
heating the filament to a temperature between a glass transition temperature and a melting temperature for the filament; and
thermally bonding a first portion of the filament to a second portion of the filament.

5. The method of claim 1 further comprising: absorbing the filaments by the trachea, wherein the filament material is a bioplastic material.

6. A method for creating a tubular insert comprising:
obtaining magnetic resonance imaging (Mill) data for a portion of a patient;
converting the MRI data into 3D mesh data for an internal surface of the portion of the patient;
using surface measurements of the internal surface to create a core design having non-uniform surfaces;
3D printing a porous core with a water soluble sugar from the core design;
wrapping a thermoplastic filament multiple times around a circumference of the porous core in a first helical direction and a second helical direction that is opposite the first helical direction wherein the second helical direction forms an overlapped pattern with the first helical direction and a plurality of fused overlap points are formed where the second helical direction crosses over the first helical direction;
hardening the filament to create a tubular insert;
placing the porous core in water to dissolve at least a portion of the porous core; and
separating the tubular insert from the porous core.

7. The method of claim 6 wherein the internal surface is within a trachea of the patient, further comprising:
compressing the tubular insert to reduce an outer diameter of the tubular insert;
inserting the tubular insert into the trachea; and
allowing the tubular insert to expand and compress against the inner surface of the trachea.

8. The method of claim 6 wherein the internal surface is within an artery of the patient, further comprising:
compressing the tubular insert to reduce an outer diameter of the tubular insert;
inserting the tubular insert into the artery; and
allowing the tubular insert to expand and compress against the inner surface of the artery.

9. The method of claim 6 further comprising:
heating the filament to a temperature between a glass transition temperature and a melting temperature for the filament; and
thermally bonding a first portion of the filament to a second portion of the filament.

10. The method of claim 6 further comprising:
absorbing the filament by the trachea, wherein the filament material is a bioplastic material.

11. A method for creating a tubular insert comprising:
obtaining surface measurements for an internal surface of a patient having a branch configuration;
using the surface measurements to create a core design having the branch configuration;
3D printing a porous core with a soluble material from the core design;
wrapping a thermoplastic filament multiple times around a circumference of the porous core in a first helical direction and a second helical direction that is opposite the first helical direction wherein the second helical direction forms an overlapped pattern with the first helical direction and a plurality of fused overlap points are formed where the second helical direction crosses over the first helical direction;
hardening the filament to create a tubular insert;
placing the porous core in water to dissolve at least a portion of the porous core; and
separating the tubular insert from the porous core.

12. The method of claim 11 wherein the internal surface is within a trachea and bronchial tubes of the patient, further comprising:
compressing the tubular insert to reduce an outer diameter of the tubular insert;
inserting the tubular insert into the trachea and the bronchial tubes; and
allowing the outer diameter of the tubular to compress the outer diameter of the tubular insert against the inner surface of the trachea and the bronchial tubes.

13. The method of claim 11 wherein the internal surface is within an artery of the patient, further comprising:
compressing the tubular insert to reduce an outer diameter of the tubular insert;
inserting the tubular insert into the artery; and
allowing the tubular insert to expand and compress against the inner surface of the artery.

14. The method of claim 11 further comprising:
heating the filament to a temperature between a glass transition temperature and a melting temperature for the filament; and
thermally bonding a first portion of the filament to a second portion of the filament.

15. The method of claim 11 further comprising:
absorbing the filament by the trachea, wherein the filament material is a bioplastic material.

Assignees

• 3D Systems Inc

Inventors

• Dunne Patrick C

Classifications

• B29L2031/7532

  Artificial members, protheses · CPC title

• B29C41/14

  Dipping a core {(B29C41/10 takes precedence)} · CPC title

• B33Y10/00

  Processes of additive manufacturing · CPC title

• A61B5/1076

  for measuring dimensions inside body cavities, e.g. using catheters (A61B3/1005 takes precedence) · CPC title

• B29L2031/753

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