Abstract
Summary
1) These studies indicate that the behavior of radiostrontium in man is similar to that in animals. When ingested in water solution by adults, about 74% was excreted via the feces and 6% via the urine; the absorption occurred mainly within 4 hours after ingestion. Values are given for the plasma and urinary levels attained at steady state under conditions of ingestion with milk at each meal; these may be of use for monitoring purposes. 2) Two leukemia patients showed low plasma and urinary levels of radiostrontium whereas a patient with an osteolytic lesion showed a tendency towards high plasma levels. 3) When radiostrontium and radiocalcium were fed simultaneously in milk with each meal for several days there was a discrimination against strontium by a factor of about 2; this resulted almost equally from preferential absorption of calcium and preferential urinary excretion of strontium.
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