Evaluation of Erythrocyte Sodium-22 Influx as a Laboratory Test for the Diagnosis of Essential Hypertension.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
Pagination or Media Count:
A simple new procedure to measure erythrocyte uptake of sodium-22 was evaluated as a laboratory test for the diagnosis of essential hypertension. Erythrocytes from 25 normotensive controls, 18 normotensive offspring of essential hypertensives, 25 patients with essential hypertension and 25 patients with hypertension secondary to renal disease, were incubated in an isotonic buffer containing sodium-22. Intracellular sodium and potassium were also measured to determine the influence of these cations on net sodium influx. Mean sodium-22 influx was significantly higher in patients with essential hypertension 0.278 or - 0.079mmolliter cellshour than normotensive controls 0.216 or - 0.037 or secondary hypertensives 0.220 or - 0.047 p 0.01. Erythrocyte sodium and potassium concentration in patients with essential hypertension is not significantly different from controls. Sodium influx does not appear to be affected by the intracellular concentration of Na or K. Overlap occurred in all four groups. This procedure may provide important diagnostic and prognostic information for the treatment of patients with essential hypertension.
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