نتایج جستجو برای: metanephrines
تعداد نتایج: 296 فیلتر نتایج به سال:
The influence of 35 commonly used drugs on measurement of metanephrines in urine was evaluated. Two concentrations of drugs were chosen for study based on usual doses and the percent of dose excreted unchanged in the urine. At "medium" drug concentrations, only phenylephrine falsely elevated metanephrine levels, whereas at a 10-fold higher drug concentration, guanethidine, hydrocortisone, imipr...
A 74-year-old man presented with right flank pain and a palpable mass in the left flank. Blood pressure was normal. Contrastenhanced computed tomography (CT) showed a 17 × 16 × 12 cm retroperitoneal mass over the left kidney, solid and heterogeneous. There were also 3 retro aortic lymph nodes and bilateral renal lithiasis. Twenty four-hour urinary metanephrines and normetanephrines were normal....
Spectrophotometric assays for urinary metanephrines are still widely used because of the simple equipment needed. These methods, however, have the major drawback of being very susceptible to interference. Using the original Pisano technique (Pisano, J. J. (1960) Clin. Chim. Acta 5, 406-414) we have often observed overestimation of the metanephrine concentration. By measuring absorbances at thre...
High prevalence of germinal mutations in pheochromocytomas with normal urinary metanephrines results
Endocrine Hypertension: Diagnostic Approaches. Endocrine diseases are the most common secondary forms of hypertension. Because of its high prevalence (5–13 % in hypertension), primary hyperaldosteronism is most important in this context. Diagnosis of this entity is recommended in hypokalemic hypertension, in therapy-resistant hypertension (≥ 3 drugs and RR > 140/90 mmHg), in strong hypertension...
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