scholarly journals Whole blood versus serum ionized calcium concentrations in dialysis patients

2014 ◽  
Vol 29 (2) ◽  
pp. 226 ◽  
Author(s):  
Seok Hui Kang ◽  
Kyu Hyang Cho ◽  
Jong Won Park ◽  
Kyung Woo Yoon ◽  
Jun Young Do
Keyword(s):  
Whole Blood ◽  
Ionized Calcium ◽  
Dialysis Patients ◽  
Serum Ionized Calcium

Effect of storage on measurement of ionized calcium in serum of uremic patients.

1985 ◽  
Vol 31 (2) ◽  
pp. 287-289 ◽  
Author(s):  
N I Nikolakakis ◽  
A M De Francisco ◽  
R S Rodger ◽  
E Gaiger ◽  
T H Goodship ◽  
...  
Keyword(s):  
Whole Blood ◽  
Room Temperature ◽  
Ionized Calcium ◽  
Measured Concentration ◽  
Analytical Variance ◽  
Serum Ionized Calcium ◽  
Uremic Patients ◽  
Serum Storage

Abstract We studied, in 70 acidotic and non-acidotic uremic patients, the analytical variance in serum ionized calcium as related to duration and temperature of storage. Storage of serum or whole blood at 4 degrees C for as long as 6 h did not significantly alter the measured concentration of ionized calcium in the serum. Storage at room temperature for 6 h, or longer at 4 degrees C or -20 degrees C, resulted in inaccuracies in 39 to 79% of the samples of serum and in 38 to 92% of the samples of whole blood. These errors were not negated by correcting the values for ionized calcium to a pH of 7.40. Indeed, corrected values for calcium were even more unreliable in acidotic patients. We conclude that samples from uremic patients should be analyzed for ionized calcium within 2 h, or within 6 h if stored at 4 degrees C.

INFLUENCE OF SAMPLING METHOD ON WHOLE BLOOD IONIZED CALCIUM VALUES

1989 ◽  
Vol 71 (Supplement) ◽  
pp. A418 ◽  
Author(s):  
I. CONSTANT ◽  
B. BENETEAU ◽  
B. JUST ◽  
E. DELVA ◽  
M. VAUBOURDOLLE ◽  
...  
Keyword(s):  
Whole Blood ◽  
Sampling Method ◽  
Ionized Calcium

SERUM IONIZED CALCIUM IN NEWBORN INFANTS

PEDIATRICS ◽  
1972 ◽  
Vol 49 (6) ◽  
pp. 841-846
Author(s):  
David M. Brown ◽  
James Boen ◽  
Audrey Bernstein
Keyword(s):  
Biochemical Parameters ◽  
Newborn Infants ◽  
Ionized Calcium ◽  
Entire Group ◽  
Total Calcium ◽  
Serum Total Protein ◽  
Ionic Calcium ◽  
Serum Ionized Calcium ◽  
Absolute Concentrations ◽  
Positive Correlations

Relationships of serum ionized calcium with several biochemical parameters have been examined in newborn infants under 72 hours of age. Hypocalcemia was defined as plasma total calcium below 7.5 mg/100 ml. There was a linear correlation between plasma total calcium and ionized calcium in the entire group. Other positive correlations included: (1) plasma total calcium and serum total protein, albumin, and globulins and (2) absolute concentrations of ionic calcium and albumin. No statistically significant correlations were observed between either total or ionized calcium and serum phosphorus, percent ionized calcium, capillary pH, or Pco2. The derived values for serum ionic calcium from the McLean-Hastings nomogram did not correlate with the plasma ionic calcium as determined by the ion-specific electrode and may not be used in newborn infants to predict accurately the level of plasma ionic calcium.

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