A Calculation Model For Serum Ionized Calcium Based On An Equilibrium Equation For Complexation | 10219
ISSN: 2155-9872

Journal of Analytical & Bioanalytical Techniques
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A calculation model for serum ionized calcium based on an equilibrium equation for complexation

4th International Conference and Exhibition on Analytical & Bioanalytical Techniques

Susumu Takano and Kayo Osawa

Posters: J Anal Bioanal Tech

DOI: 10.4172/2155-9872.S1.014

Background: Measurement of ionized calcium is more important than the measurement of total calcium in serum samples. Equations for calculating the amount of ionized calcium have been determined using the levels of total calcium; however, these are not accurate, and therefore we devised new equations. Methods: Our equations were derived from equilibrium equations of complex formation and acid dissociation such that the amount of ionized calcium could be determined from the observed level of total calcium, albumin, total protein and inorganic phosphate in serum. The ionized calcium level was calculated in 67 serum samples from healthy subjects and 34 outpatients previously identified with abnormal serum calcium levels. Results: The correlation coefficient and the equation for linear regression between our method (y) and the electrode method (x) was 0.953 and y=0.97x, respectively, at pH 7.4 as a factor value of 0.21. The factor value was the basis of the difference of values for the amount of calcium phosphorus compounds by the electrode method. Conclusions: Our method of calculation proved to be as useful and accurate as the electrode method and therefore extremely useful for clinical diagnoses.
Susumu Takano has completed his master?s degree from Kobe University. He is a researcher and specialist in the department of clinical chemistry.