Plasma & urinary catecholamines & urinary vanillylmandelic acid levels in patients with generalized vitiligo
نویسندگان
چکیده
منابع مشابه
Uniform chromatographic conditions for quantifying urinary catecholamines, metanephrines, vanillylmandelic acid, 5-hydroxyindoleacetic acid, by liquid chromatography, with electrochemical detection.
Uniform liquid-chromatographic conditions were developed such that we could quantify norepinephrine, epinephrine, normetanephrine, metanephrine, vanillylmandelic acid, and 5-hydroxyindoleacetic acid in urine by using a single mobile phase of monochloroacetic acid and citric acid, 0.1 mol/L each. All compounds were separated on a C18 column and detected electrochemically at a potential of +0.800...
متن کاملAge dependence of the levels of plasma norepinephrine, aldosterone, renin activity and urinary vanillylmandelic acid in normal and essential hypertensives.
In the present study the upper reference limits (URLs) for resting plasma norepinephrine, epinephrine, serum aldosterone, plasma renin activity, aldosterone/renin activity ratio, as well as urinary vanillylmandelic acid in healthy Egyptian normotensive subjects over a range of ages (5-60 yr) were established. There was a significant age effect on plasma norepinephrine, UVMA, serum aldosterone a...
متن کاملPlasma and urinary catecholamines in salt-sensitive idiopathic hypertension.
Nineteen patients with normal renin idiopathic hypertension were arbitrarily classified as salt-sensitive or salt-resistant depending on whether their mean arterial pressure did or did not increase by 8% or more when sodium intake was increased. The responses of the two subsets and of five normal subjects to sodium intakes of 9, 109, and 249 mEq/day given for 7 days were as follows: The salt-se...
متن کاملUrinary and plasma catecholamines and urinary catecholamine metabolites in pheochromocytoma: diagnostic value in 19 cases.
We review our data on the measurement of catecholamines and their metabolites in 19 patients with pheochromocytoma. All the assays were specific high-performance liquid chromatographic procedures with electrochemical detection. The assay of fractionated metanephrines was 100% sensitive. Normal values for both urinary norepinephrine and epinephrine were found in two asymptomatic patients with ph...
متن کاملDetermination of urinary 3-methoxy-4-hydroxymandelic acid (vanillylmandelic acid) by paper electrophoresis.
called vanillylmandelic acid (VMA), in urine has recently come into use as a confirmatory test for pheochromocytoma (1-6). Armstrong and his associates (1, 2, 7) discovered that this phenolic acid occurred in small amounts in normal human urine and in elevated concentrations in pheochromocytoma. As a result of their observations (1, 2) and especially of those by others in related investigations...
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ژورنال
عنوان ژورنال: Indian Journal of Medical Research
سال: 2018
ISSN: 0971-5916
DOI: 10.4103/ijmr.ijmr_657_16