Estimation of the 24 Hour Exchangeable Calcium Pool in Children Using ■'^Ca 191 



Results 



In all cases -^^^Ca specific activity fell rapidly following injection so that normal 

 abundance levels were reached within one week. A typical pattern of '*'^Ca abundance 

 change following injection is shown in Fig. 1. When plotted logarithmically the 



Abundance of Ca in urine calciur 



Subject H- 



Dose: 4.03mg ""Ca as 39.7% enrichment 



2 — 



r = 0.9%l 



72 

 Hours 

 Fig. 2 



144 



