Distribution and Excretion of Electrolytes after Acute Whole-body Irradiation Injury. I. Studies with Radiopotassium.

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Abstract
Radiopotassium is useful as a tracer to follow alterations in tissue concn. and the pattern of excretion of K after whole-body irradiation above an LD50 to adult male rats. There is a prompt loss of K from radiosensitive tissues except testis and from bone. The loss from bone represents K moving out of bone marrow as well as K from bone lattice or from bone cells. With the onset of diarrhea there is a sharp rise in fecal radio-K excretion. Urinary radio-P is increased for the first 72 hrs. after irradiation.