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OBJECTIVE To establish a norm of the precision achievable with a micropipette in an IRMA assay under routine conditions. MATERIAL AND METHODS A micropipette (Gilson) adjusted to dispense 100 microL was used by a single analyst with experience in its use. In each assay, ten aliquots of radioactive antiprolactin were pipetted in clean tubes (PRE-batch(More)
OBJECTIVE To explore the use of data in patients as a way to evaluate the values of reference in clinical assays. Serum calcium (Ca) and phosphorus (P) were selected for this purpose. MATERIAL A total of 836 consecutive admissions in a 10 week period were revised. Seventy percent (580 cases) had data of Ca and P in the first week following admission. A(More)
Palabras clave: Angiomiolipoma. Esclerosis tuberosa. Summary.-OBJECTIVE: To report the clinical and radiological data of a 23-year-woman with bilateral angiomyo-lipoma and Tuberous Sclerosis with conservative treatment. METHODS: The patient underwent conservative urological management, based on clinical and complementary tests`data (ultrasonography, CT(More)
OBJECTIVE To evaluate the precision and accuracy of the liquid dispensers being used in our institution. MATERIAL A total of 15 dispensers (8 micro and 7 macro) of automatic, semiautomatic or manual types were evaluated. They had been in use from 0.5 to 7 years. METHODS The volume dispensed was established by gravimetry using an analytical balance (Chio(More)
OBJECTIVE To provide an evaluation model of internal accuracy illustrating its use in a quality control program of clinical chemistry. METHODS The model uses data transformed to percentage of assigned value (%AV) that allows the pooling of different controls. Precision is evaluated by the mean of the intracontrol coefficients of variation, and accuracy by(More)
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