Impact of Time Delay in the Analysis of Serum Ionized Calcium, Sodium, and Potassium.

The difference was not significant at 4 hours but it was statistically significant beyond that ( Table 2 ). The increase in the concentration of potassium was not significant at 4 hours, but at 24 hours it was highly significant in the samples stored as such in the vacutainer, signifying the effect of clot contact.

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