Personal warming systems and apparatuses for use in hospitals and other settings, and associated methods of manufacture and use

• US 6,933,469 B2
• Filed: 04/19/2003
• Issued: 08/23/2005
• Est. Priority Date: 06/14/2000
• Status: Expired due to Term

• Current Assignee: Medline Industries Incorporated (Medline Holdings Incorporated)
• Original Assignee: American Healthcare Products Incorporated
• Inventors: Ellis, Kent D., Wyatt, Charles C., Siegner, Kenneth S., Wilkerson, Jack
• Primary Examiner(s): Walberg, Teresa J.
• Application Number:
  US10/419,705
• Publication Number:
  US 20030218003A1
• Time in Patent Office: 857 Days
• Field of Search: 219/212, 219/217, 219/528, 219/529, 219/548, 219/549, 219/543, 560/1, 562/3
• US Class Current: 219/217
• CPC Class Codes: A61B 2017/00084 Temperature
• CPC Class Codes: A61B 2017/00199 with a console, e.g. a control panel with a display
• CPC Class Codes: A61F 2007/0001 Body part
• CPC Class Codes: A61F 2007/0071 using a resistor, e.g. near the spot to be heated
• CPC Class Codes: A61F 2007/0072 remote from the spot to be heated
• CPC Class Codes: A61F 2007/0288 during operations
• CPC Class Codes: A61F 7/00 Heating or cooling appliances for medical or therapeutic treatment of the human body heating or cooling means in connection with bedsteads or mattresses A47C21/00 ; massage, therapeutic baths A61H; hyperthermia using electric or magnetic fields or ultrasound A61N; electric heating elements H05B
• CPC Class Codes: A61F 7/007 characterised by electric heating
• CPC Class Codes: H05B 2203/005 using multiple resistive elements or resistive zones isolated from each other
• CPC Class Codes: H05B 2203/011 Heaters using laterally extending conductive material as connecting means
• CPC Class Codes: H05B 2203/013 Heaters using resistive films or coatings
• CPC Class Codes: H05B 2203/017 Manufacturing methods or apparatus for heaters
• CPC Class Codes: H05B 3/36 heating conductor embedded in insulating material

Abstract

Personal warming systems and apparatuses for use in hospitals and other settings. In one embodiment, a heating mattress or pad for warming a patient during a hospital procedure can include a heating element positioned between a first foam portion and a second foam portion. The heating element and the foam portions can be at least partially enclosed in a fluid-resistant cover. The heating element can be operably connected to a control unit that allows an operator to select between a plurality of temperature options for the heating pad. In another embodiment, the heating pad can include one or more radiolucent, or at least generally radiolucent, features that will not appreciably obscure x-ray images taken of a patient positioned on the heating pad. In one aspect of this embodiment, the radiolucent features can include one or more of a carbon-based heating element, an optical temperature sensing device, and/or a thermally responsive state-changing device.

Claims

1. A personal warming device usable to warm a patient undergoing an x-ray examination in an x-ray field, the personal warming device comprising:

a patient support portion configured to support at least a portion of the patient in the x-ray field;

a heating element positioned at least proximate to the patient support portion, the heating element configured to generate heat to warm the patient when the patient is positioned at least partially on the patient support portion;

a temperature sensing device positioned at least proximate to the heating element, wherein the temperature sensing device is at least generally transparent to x-rays, and wherein the temperature sensing device is configured to change a characteristic of a light signal passing through it when it is heated to a predetermined temperature;

a first fiber optic tubes operably coupled to the temperature sensing device; and

a second fiber optic tube operably coupled to the temperature sensing device, wherein the first fiber optic tube is configured to transmit the light signal to the temperature sensing device, and wherein the second fiber optic tube is configured to transmit the light signal away from the temperature sensing device.

2. The personal warming device of claim 1 wherein the patient support portion includes a compressible foam portion that at least generally overlays the heating element, and wherein the compressible foam portion is positioned at least generally between the temperature sensing device and the heating element.

3. The personal warming device of claim 1 wherein the heating element includes conductive ink disposed on a flexible substrate, and wherein the heating element is configured to generate heat by conducting electrical current through at least a portion of the conductive ink.

4. The personal warming device of claim 1 wherein the heating element includes conductive non-metallic ink disposed on a flexible substrate, and wherein the heating element is configured to generate heat by conducting electrical current through at least a portion of the conductive non-metallic ink.

5. The personal warming device of claim 1 wherein the heating element includes carbon ink disposed on a flexible substrate, and wherein the heating element is configured to generate heat by conducting electrical current through at least a portion of the carbon ink.

6. The personal warming device of claim 1 wherein the patient support portion includes a first foam pad disposed adjacent to a first surface of the heating element, and further comprising a second foam pad disposed adjacent to a second surface of the heating element opposite the first surface of the heating element.

7. The personal warming device of claim 1 wherein the heating element includes at least a first layer of polyester film carrying a conductive ink, and wherein the heating element is configured to generate heat by conducting electrical current through at least a portion of the conductive ink.

8. The personal warming device of claim 1 wherein the heating element includes a first conductive lead spaced apart from a second conductive lead to define a space therebetween, wherein the heating element further includes conductive ink extending at least partially between the first and second conductive leads, and wherein the heating element is configured to generate heat by conducting electrical current through at least a portion of the conductive ink.

9. The personal warming device of claim 1 wherein the heating element includes first and second conductive leads carried by at least one layer of polyester film, wherein the first conductive lead is spaced apart from the second conductive lead to define a space therebetween, wherein the heating element further includes conductive ink carried by the polyester film and extending at least partially between the first and second conductive leads, and wherein the heating element is configured to generate heat by conducting electrical current through at least a portion of the conductive ink.

10. The personal warming device of claim 1 wherein the patient support portion includes a first pad portion, and further comprising a second pad portion, wherein the heating element and the temperature sensing device are at least generally sandwiched between the first and second pad portions.

11. The personal warming device of claim 1 wherein the temperature sensing device is operatively connected to the heating element via a temperature control circuit, and wherein the temperature control circuit is configured to shut off power to the heating element if the temperature of the heating element exceeds a threshold temperature as sensed by the temperature sensing device.

12. The personal warming device of claim 1 wherein the temperature sensing device is configured to be operatively connected to a display device configured to display a temperature of the heating element.

13. A personal warming device usable to warm a patient undergoing an x-ray examination in an x-ray field, the personal warming device comprising:

a heating element configured to generate heat to warm the patient

a first foam pad disposed adjacent to a first sufface of the heating element;

a second foam pad disposed adjacent to a second surface of the heating element opposite the first surface of the heating element;

a carbon fiber sleeve positioned between the first and second foam pads and at least partially enclosing the heating element; and

a temperature sensing device positioned at least proximate to the heating element and configured to respond to changes in temperature of the heating element, wherein the temperature sensing device is at least generally transparent to x-rays.

14. A personal warming device usable to warm a patient undergoing an x-ray examination in an x-ray field, the personal warming device comprising:

a patient support portion configured to support at least a portion of the patient in the x-ray field;

a heating element positioned at least proximate to the patient support portion, the heating element configured to generate heat to warm the patient when the patient is positioned at least partially on the patient support portion;

a first radiolucent temperature sensing device positioned at least proximate to the heating element and configured to respond to changes in temperature of the heating element, wherein the first radiolucent temperature sensing device is operatively connected to the heating element via a first temperature control circuit, wherein the first temperature control circuit is configured to shut off power to the heating element if the temperature of the heating element exceeds a first threshold temperature as sensed by the first radiolucent temperature sensing device; and

a second radiolucent temperature sensing device operatively connected to the heating element via a second temperature control circuit, wherein the second temperature control circuit is configured to shut off power to the heating element if the temperature of the heating element exceeds a second threshold temperature as sensed by the second radiolucent temperature sensing device.

15. A personal warming device comprising:

a patient support portion configured to support at leat part of person;

a heating element positioned at least proximate to the patient support portion, the heating element configured to generate heat to warm the person when the person is positioned at least partially on the patient support portion;

an optical temperature sensing device positioned at least proximate to the heating element and configured to respond to changes in temperature of the heating element, wherein the optical temperature sensing device is at least generally transparent to x-rays, and;

at least one fiber optic cable operatively coupled to the optical temperature sensing device to transmit temperature information from the optical temperature sensing device.

16. The personal warming device of claim 15 wherein the patient support portion includes foam material.

17. The personal warming device of claim 15 wherein the patient support portion includes a plurality of individual foam particles.

18. The personal warming device of claim 15 wherein the patient support portion includes a viscoelastic foam pad at least generally overlaying the heating element.

19. The personal warming device of claim 15 wherein the patient support portion includes a contoured foam portion configured to support at least a portion of the person'"'"'s body in an elevated position.

20. The personal warming device of claim 15 wherein the optical temperature sensing device includes a thermally responsive device configured to change a characteristic of a light signal passing through it when it is heated to a predetermined temperature.

21. The personal warming device of claim 15 wherein the optical temperature sensing device includes a thermal chromatic liquid crystal.

22. The personal warming device of claim 15 wherein the heating element includes conductive ink disposed on a flexible substrate, and wherein the heating element is configured to generate heat by conducting electrical current through at least a portion of the conductive ink.

23. The personal warming device of claim 15 wherein the heating element includes carbon ink disposed on a flexible substrate, and wherein the heating element is configured to generate heat by conducting electrical current through at least a portion of the carbon ink.