| abstract |
A fever indicator which can be visually monitored by observation of a temperature-dependent color-changing characteristic thereof. Said indicator is advantageously formed of a mixture of liquid crystals, e.g., a mixture formed of cholesteryl pelargonate and cholesteryl oleyl carbonate and maintained in contact with a porous and inert, but translucent, material. The mixture is incorporated into an apparatus comprising a reservoir, which can be formed of the porous inert material, and normally includes a fastening means for holding said reservoir in close contact with the body of a patient. Where a black background is required to aid the visibility of the color change, graphite-type carbon powders have been found most advantageous for use. |