Experiences with radioisotope renography in children.

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Abstract
Experiences with isotope renography in 159 children are described. In children over 2 years old the normal reno-gram is the same as in the adult. The variations of the normal are wide and the tracing is influenced by the function of the opposite kidney and by extrarenal factors. Three types of abnormal tracing, the flat, the rising, and the subnormal are recognized. In younger children, particularly in infants under 6 months, the normal tracing is of the flat type. Provided allowance is made for extrarenal and contralateral influences, changes in the shape of a renogram with the passage of time are indicative of changes in the tubular function and in the evacuatory capacity of the kidney under investigation. The detection of such changes in the individual kidney constitutes the main value of renog-graphy in childhood.