Dry warming method and device for preparing thermoplastic materials

• US 5,816,797 A
• Filed: 07/19/1996
• Issued: 10/06/1998
• Est. Priority Date: 07/19/1996
• Status: Expired due to Fees

• Current Assignee: S&S X-Ray Products Incorporated
• Original Assignee: S&S X-Ray Products Inc.
• Inventors: Shoenfeld, Harold
• Primary Examiner(s): KILNER, CHRISTOPHER B
• Application Number:
  US08/684,449
• Time in Patent Office: 809 Days
• Field of Search: 432/33, 219/385, 219/386
• US Class Current: 432/33
• CPC Class Codes: A61B 90/14 Fixators for body parts, e.g. skull clamps; Constructional details of fixators, e.g. pins
• CPC Class Codes: A61B 90/18 Retaining sheets, e.g. immobilising masks made from a thermoplastic material
• CPC Class Codes: A61L 15/12 containing macromolecular materials
• CPC Class Codes: A61N 2005/1097 Means for immobilizing the patient

Abstract

A method for preparing a thermoplastic material, with dry heat, for use in patient fixation. The method includes generating heat to a threshold temperature and transferring the heat to the thermoplastic material by a heat conductive path. Once the thermoplastic material has become pliable, it is molded into a cast for fixation purposes. The heat may be generated by a device having a housing and a member movable attached to the housing. The device also includes a heating element for providing a heat conductive path to the member.

Claims

1. A device for warming a thermoplastic material so that the material may be prepared for use on a patient, the device comprising:

a housing;

a member movably mounted to the housing and being alternately movable between a closed position and an open position with respect to the housing;

a support surface disposed on the member for supporting the thermoplastic material; and

a heating element for distributing heat substantially uniformly over a planar surface area coincident with the element, the planar surface area of the heating element being in contact with the member.

2. A device according to claim 1 wherein the heating element is disposed in the member so that the heating element is in direct contact with the support surface.

4. A device according to claim 1 wherein the support surface includes a non-stick layer.

5. A device according to claim 1 further comprising a temperature regulator for maintaining the heating element at a set temperature.

6. A device according to claim 1 wherein the housing includes an insulation material to maintain heat within the housing.

7. A device according to claim 1 wherein the member is slidable with respect to the housing.

18. A device according to claim 1, wherein the heating element is sized with a shape similar in dimensions to that of the member, so that heat generated by the heating element may be uniformly distributed across the support surface.

3. A device for warming a thermoplastic material so that the material may be prepared for use on a patient, the device comprising:

a housing;

a member movably mounted to the housing and being alternately movable between a closed position and an open position with respect to the housing;

a support surface disposed on the member for supporting the thermoplastic material; and

heating element for distributing heat substantially uniformly over a planar surface area coincident with the element, the heating element being disposed in the housing such that when the member is moved to a closed position, the heating element is in direct contact with the support surface.

8. A device for warming a thermoplastic material into a pliable form for use in patient fixation, the device comprising:

a housing;

a member movably mounted to the housing;

a conductive panel positioned on the member and having a surface for supporting the thermoplastic material thereon above the member; and

a heating element disposed in the member beneath the surface of the conductive panel to provide a heat conductive path to the surface of the conductive panel.

9. A device according to claim 8 wherein the heating element distributes heat substantially uniformly across the support surface of the conductive panel.

10. A device according to claim 8 wherein the conductive panel includes a non-stick layer on the support surface.

11. A device according to claim 8 further comprising a temperature regulator for maintaining the heating element at a set temperature.

12. A device according to claim 8 wherein the housing includes an insulation material to maintain heat within the housing.

19. A device according to claim 8, wherein the heating element is sized with a shape similar in dimensions to that of the member, so that heat generated by the heating element may be uniformly distributed across the conductive panel.

13. A device for warming a thermoplastic material into a pliable form for use in patient fixation, the device comprising:

a housing;

a member movably mounted to the housing and capable of moving between a closed position and an open position relative to the housing;

a conductive panel situated on the member and having a surface for supporting the thermoplastic material thereon; and

a heating element disposed within the housing for providing heat substantially uniformly over a planar surface area coincident with the element, such that when the member is moved into the closed position, the heating element is in approximation with the conductive panel beneath the surface of the panel so as to provide a heat conductive path to the surface of the panel.

14. A device according to claim 13 wherein the heating element distributes heat substantially uniformly across the support surface of the conductive panel.

15. A device according to claim 13 wherein the conductive panel includes a non-stick layer on the support surface.

16. A device according to claim 13 further comprising a temperature regulator for maintaining the heating element at a set temperature.

17. A device according to claim 13 wherein the housing includes an insulation material to maintain heat within the housing.

20. A device according to claim 13, wherein the heating element is sized with a shape similar in dimensions to that of the member, so that heat generated by the heating element may be uniformly distributed across the conductive panel.