The production of anesthesia by freezing, the relief of pain by heat or cold, the reduction of pyrexia by cold baths, evaporation of water or alcohol, etc., are all familiar practices; so also are the cold morning sponge, spray, shower or tub given for the general tonic effect. Since little attention, however, has in the past been paid to hydrotherapy in our medical schools, such measures are not always accurately prescribed nor given the serious attention which they deserve.
THE PHYSIOLOGIC EFFECTS OF COLD WATER
As the effect of cold has been most carefully studied by the hydrotherapeutist, and as water offers the most convenient medium for laboratory experimentation, let us first consider the effect of cold water. Without entering into physiologic detail we may understand by the word "cold," those temperatures which lower the temperature of the human body. (All those temperatures below a neutral zone which has no
HOWARD BF. THE THERAPEUTIC USE OF COLD: WITH ESPECIAL REFERENCE TO THE CLIMATIC TREATMENT OF TUBERCULOSIS. JAMA. 1915;LXIV(13):1045–1047. doi:10.1001/jama.1915.02570390005002
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