Magnetorheological elastomer and magnetorheological fluid for clinical wrap

Patent metadata

Field	Value
Publication number	US-11801161-B2
Application number	US-202217952615-A
Country	US
Kind code	B2
Filing date	Sep 26, 2022
Priority date	Apr 20, 2018
Publication date	Oct 31, 2023
Grant date	Oct 31, 2023

Abstract

A reinforcing clinical wrap is provided with integral thermal management. The clinical wrap includes a fluid circuit for a heat transfer medium to circulate between a fluid inlet and a fluid outlet. A shape conforming medium is disposed within a portion of the clinical wrap providing selective reinforcement support of the portion of the clinical wrap to conform to a surface of a patient. Non-limiting examples of the shape conforming medium may include a magnetorheological elastomer, a magnetorheological elastomer, a magnetorheological foam, a UV curable resin, and a phase change material.

First claim

What is claimed is:

1. A reinforcing clinical wrap with integral thermal management, the clinical wrap comprising:
a fluid inlet;
a fluid outlet;
a first set of channels providing a fluid circuit for a heat transfer medium to circulate between the fluid inlet and the fluid outlet;
a second set of channels providing fluid communication through a portion of the clinical wrap configured to interface with a patient; and
a shape conforming medium disposed in the second set of channels and comprising a magnetorheological fluid with a viscosity that varies in response to exposure to a magnetic field to provide adjustable reinforcement support of the portion of the clinical wrap to conform to a surface of a patient.

2. The clinical wrap according to claim 1 , wherein the magnetorheological fluid comprises a distribution of ferromagnetic particles with a range of densities to minimize particle settling and agglomeration.

3. The clinical wrap according to claim 1 , further comprising an electrically conductive circuit disposed throughout the clinical wrap and configured to selectively generate a magnetic field.

4. The clinical wrap according to claim 1 , wherein the shape conforming medium is thermally conductive.

5. The clinical wrap according to claim 1 , wherein the fluid circuit is configured to circulate a heat transfer medium selected from the group consisting of air and water.

6. The clinical wrap according to claim 1 , wherein the first set of channels and the second set of channels are arranged in an alternating side-by-side alignment with one another.

7. The clinical wrap according to claim 1 , wherein the second set of channels is shaped to selectively maintain the clinical wrap at a predetermined configuration to immobilize at least a portion of the patient.

8. The clinical wrap according to claim 1 , wherein the first set of channels defines at least two thermal zones configured for selectively maintaining different temperatures.

9. The clinical wrap according to claim 1 , wherein the second set of channels defines at least two pressure zones configured for selectively maintaining different pressures.

10. A method for incorporating thermal management with an immobilizing patient clinical wrap, the method comprising:
integrating a shape conforming medium within a clinical wrap, the clinical wrap being configured to be applied around a predetermined location of a patient, contouring an inside surface of the clinical wrap adjacent the patient;
integrating a heat transfer medium within the clinical wrap, the heat transfer medium being configured to circulate throughout the clinical wrap at a predetermined temperature, maintaining a consistent temperature at the inside surface adjacent the patient; and
providing a controller to selectively activate the shape conforming medium.

11. The method according to claim 10 , wherein the shape conforming medium exhibits a change in rigidity in response to exposure to a magnetic field.

12. The method according to claim 11 , wherein the shape conforming medium comprises at least one of a magnetorheological fluid, a magnetorheological elastomer, and a magnetorheological foam.

13. The method according to claim 11 , wherein the shape conforming medium is activated by engaging an electromagnet to generate the magnetic field.

14. The method according to claim 11 , wherein the magnetic field is generated by energizing an electrically conductive circuit disposed throughout the clinical wrap.

15. The method according to claim 10 , wherein the shape conforming medium comprises an ultraviolet (UV) curable resin, and activating the shape conforming medium comprises applying UV irradiation to polymerize and cure the UV curable resin.

16. The method according to claim 10 , wherein the clinical wrap defines a first set of channels providing a fluid circuit for circulating the heat transfer medium through the clinical wrap between a fluid inlet and a fluid outlet, and the clinical wrap defines a second set of channels containing the shape conforming medium.

17. The method according to claim 16 , wherein the first set of channels and the second set of channels are arranged in an alternating side-by-side alignment with one another.

18. The method according to claim 10 , wherein, when activated, the shape conforming medium disposed within the clinical wrap produces a pressure between the inside surface of the clinical wrap and the patient; and
circulating the heat transfer medium through the clinical wrap does not increase the pressure.

19. The method according to claim 10 , wherein the clinical wrap is separated into first and second regions, and the first and second regions are configured to be maintained at a different temperature, a different rigidity, or both.

20. The method according to claim 10 , wherein the shape conforming material is provided as a layer throughout a portion of the clinical wrap.

Assignees

• Stryker Corp

Inventors

• Taylor Gregg
• Titov Alexey
• Phan Hieu

Classifications

• A61F7/02 Primary

  Compresses or poultices for effecting heating or cooling · CPC title

• C08K3/08

  Metals · CPC title

• A47G9/0215

  with cooling or heating means (electric blankets H05B3/34) · CPC title

• A47G2009/004

  comprising magnets · CPC title

• A47G2009/008

  using a liquid as filling material · CPC title