The invention relates to extended life thermal packs. In one embodiment, the thermal pack comprises a container having a first thermally reactive chemical solute therein, a rupturable solvent packet containing a solvent, and a rupturable solute packet containing a second thermally reactive chemical solute in the solute packet. The solutes are chemically separated until time of use and are different from one another. The chemical separation of solutes until time of use in combination with the structure of the thermal pack structure afford both extended duration of thermal effect by the pack and afford the user with increased control by permitting optional sequential combination of the reactants. The thermal reaction produced by the combination of solute and solvent can be either endothermic or exothermic and therefore can be used to apply cold or hot therapy, respectively.
An absorbent thermal bag made in accordance with the principles of the present invention includes an absorbent pad operatively associated with a thermal bag which can be regenerated in situ. The junction of the absorbent pad and the thermal bag defines an unobstructed perimeter area that is an area of the absorbent pad that extends beyond the thermal bag. The unobstructed perimeter area provides an area of improved absorption and allows the side-by-side simultaneous placement of the thermal bag and the absorbent pad on a wound site. The thermal bag can contain endothermic materials such as ice for cold therapy or, alternatively, exothermic materials for heat therapy.
Daniel Kohout - Grayslake IL Charles Ray Mason - Moberly MO Michael Fleck - Moberly MO E. Ron Phipps - Columbia MO Tim Shaneberger - Columbia MO Everett Posey - Jacksonville TX Gregory Groenke - Gurnee IL
Assignee:
Allegiance Corporation - McGaw Park IL
International Classification:
A61F 700
US Classification:
607 96, 607114, 5603, 5421, 5945
Abstract:
The invention disclosed herein relates to a device for applying thermal therapy, treatment or comfort to a patient or user which includes a container having an upper side and lower side with a space therebetween containing a chemical composition adapted to provide a thermal effect, and a plurality of discrete attachment areas which generally define a central location in the container. The device has a nest configuration and automatically conforms to the users geometry upon application of weight thereon. The discrete attachment areas are positioned to define an inner peripheral base portion and outer peripheral portion in the device which collectively form the nest configuration. The device is particularly useful in thermal treatment for infants.
A cold pack 10 made in accordance with the principles of the present invention includes a container 18. Disposed within the container 18 is a first endotherm-producing chemical 15. Also disposed within the container 18 is a solvent packet 13 and a chemical packet 11. Second endotherm-producing chemical 43 is disposed in the chemical packet 11. First endotherm-producing chemical 15, the solvent packet 13 and the chemical packet 11 are collectively components of the cold pack. Preferably the container 18 is sealed so as to surround and encase the components of the cold pack 10. The first endotherm-producing chemical 15 and the second endotherm-producing chemical 43 are selected to be different. Both the first endotherm-producing chemical 15 and the second endotherm-producing chemical 43 may be selected from among those compounds with a positive enthalpy of solution (. DELTA. sub. sol /H. degree. , kJ/mol) and which produce a reduced temperature of solution that is greater than 10. degree. F.
An absorbent ice bag (10) made in accordance with the principles of the present invention includes an absorbent pad (12) operatively associated with an ice bag (15). The junction of the absorbent pad (12) and the ice bag (15) defines an unobstructed perimeter area that is an area of the absorbent pad (12) that extends beyond the ice bag (15). The unobstructed perimeter area provides an area of improved absorption and allows the side-by-side simultaneous placement of the ice bag (15) and the absorbent pad (12) on wound site. The ice bag (15) may contain ice (14), or other suitable phase change material. The ice bag (15) may also contain water (16), or other liquid that results from melting of the phase change.
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