Synthetic tissue structures for electrosurgical training and simulation

Patent metadata

Field	Value
Publication number	US-11034831-B2
Application number	US-201816138652-A
Country	US
Kind code	B2
Filing date	Sep 21, 2018
Priority date	May 14, 2015
Publication date	Jun 15, 2021
Grant date	Jun 15, 2021

Abstract

A surgical simulator for electrosurgical training and simulation is provided. The surgical simulator includes one or more simulated tissue structures made substantially of a hydrogel comprising a dual interpenetrating network of ionically cross-linked alginate and covalently cross-linked acrylamide. Combinations of different simulated tissue structures define procedural-based models for the practice of various electrosurgical procedures including laparoscopic total mesorectal excision, transanal total mesorectal excision, cholecystectomy and transanal minimally invasive surgery. Methods of making the simulated tissue structures are also provided.

First claim

The invention claimed is:

1. A method of making a surgical simulator, comprising:
providing a solution comprising an acrylamide polymer, an alginate polymer and water;
casting the solution into hollow tube molds;
curing the solution in the hollow tube molds to form hollow tubes made of hydrogel; and
arranging the formed hollow tubes of hydrogel to form a simulated electrosurgery model for practicing and simulating electrosurgery.

2. The method of claim 1 wherein at least one of the hollow tube molds includes a mandrel.

3. The method of claim 1 further comprising providing a colorant and mixing the colorant into the provided solution.

4. The method of claim 1 further comprising flushing the provided solution with argon gas.

5. The method of claim 1 further comprising adding a persulfate to the provided solution.

6. The method of claim 1 wherein the arranging the formed hollow tubes of hydrogel further comprises concentrically placing the formed hollow tubes of hydrogel within each other.

7. The method of claim 6 further comprising providing a collagen layer and placing the collagen layer in between the concentrically placed hollow tubes of hydrogel.

8. The method of claim 1 wherein the arranging the formed hollow tubes of hydrogel further comprises stacking the formed hollow tubes of hydrogel on each other.

9. The method of claim 8 further comprising overmolding the stacked formed hollow tubes of hydrogel.

10. The method of claim 8 further comprising adhering the stacked formed hollow tubes of hydrogel together.

11. A method of making a surgical simulator, comprising:
providing a first solution comprising an acrylamide polymer, an alginate polymer and water;
casting the first solution into a first hollow tube mold;
curing the first solution in the hollow tube molds to form a first hollow tube made of hydrogel;
providing a second solution comprising an acrylamide polymer, an alginate polymer and water;
placing the first hollow tube in a second hollow tube mold;
pouring the second solution over the first hollow tube;
curing the second solution and the first hollow tube to form a simulated electrosurgery model for practicing and simulating electrosurgery.

12. The method of claim 11 further comprising providing a colorant and mixing the colorant into at least one of the provided first solution and second solution.

13. The method of claim 11 further comprising flushing at least one of the provided first solution and second solution with argon gas.

14. The method of claim 11 further comprising adding a persulfate to at least one of the provided first solution and second solution.

15. A surgical simulator for surgical training comprising:
a synthetic tissue model comprising:
a first tube formed of a hydrogel including an alginate network cross-linked with an acrylamide network; and
a second tube formed of a hydrogel including an alginate network cross-linked with an acrylamide network, the first tube having a first diameter larger than a second diameter of the second tube.

16. The surgical simulator of claim 15 wherein the second tube is disposed within the first tube.

17. The surgical simulator of claim 15 wherein the second tube is positioned on the first tube.

18. The surgical simulator of claim 15 further comprising a layer disposed over the first tube, the layer being made of at least one of silicone, mesh, urethane and hydrogel.

19. The surgical simulator of claim 15 further comprising a conductive pathway coupled to the first tube and extending away from the first and second tubes.

20. The surgical simulator of claim 15 wherein the hydrogel of the first and second tubes each has a ratio of acrylamide to alginate by weight, each ratio being the same.

Assignees

• Applied Med Resources

Inventors

• Felsinger Natasha
• Chehayeb Sam
• Bolanos Eduardo

Classifications

• G09B23/30 Primary

  Anatomical models {(G09B23/281 - G09B23/288 take precedence)} · CPC title

• C08J2405/04

  Alginic acid; Derivatives thereof · CPC title

• C08J5/122

  using low molecular chemically inert solvents, swelling or softening agents · CPC title

• B29K2033/26

  Polymers of acrylamide or methacrylamide · CPC title

• B29K2005/00

  Use of polysaccharides or derivatives as moulding material · CPC title