No abstract

28 male, clinically well preterm and fullterm infants with an Apgar score >7 at 5 mine were studied. The purpose was to determine whether an impaired renal conservation of cal cium(Ca) exists; the relationship of urinary Ca excretion to Ca intake and serum Ca levels; and the relationship of urinary Ca excretion to sodium(Na) intake and urinary Na excretion. Timed urine specimens were collected between 24 and 48 hrs. of age for Ca, phosphate(P), Na, creatinine(cr), and cyclic AMP (CAMP); blood was drawn at the end of the urine collection period for cr, Ca, P, and Na. Ca was measured by atomic absorption spectrophotometry, P by the method of Fiske and Subbarow, Na

28 male, clinically well preterm and fullterm infants with an Apgar score >7 at 5 mine were studied. The purpose was to determine whether an impaired renal conservation of cal cium(Ca) exists; the relationship of urinary Ca excretion to Ca intake and serum Ca levels; and the relationship of urinary Ca excretion to sodium(Na) intake and urinary Na excretion. Timed urine specimens were collected between 24 and 48 hrs. of age for Ca, phosphate(P), Na, creatinine(cr), and cyclic AMP (CAMP); blood was drawn at the end of the urine collection period for cr, Ca, P, and Na. Ca was measured by atomic absorption spectrophotometry, P by the method of Fiske and Subbarow, Na

28 male, clinically well preterm and fullterm infants with an Apgar score >7 at 5 mine were studied. The purpose was to determine whether an impaired renal conservation of cal cium(Ca) exists; the relationship of urinary Ca excretion to Ca intake and serum Ca levels; and the relationship of urinary Ca excretion to sodium(Na) intake and urinary Na excretion. Timed urine specimens were collected between 24 and 48 hrs. of age for Ca, phosphate(P), Na, creatinine(cr), and cyclic AMP (CAMP); blood was drawn at the end of the urine collection period for cr, Ca, P, and Na. Ca was measured by atomic absorption spectrophotometry, P by the method of Fiske and Subbarow, Na