Persistent asymptomatic isolated hematuria in children: clinical and histopathological features and prognosis.

Background: This study involving 351 children who had undergone kidney biopsy secondary to persistent asymptomatic isolated hematuria was undertaken to assess histological diagnosis of the disease and its natural history and prognosis.

Methods: The patients were divided into two groups: 215 patients with asymptomatic isolated microhematuria (AIMH; proteinuria <0.1 g/day) and 136 patients with persistent asymptomatic microhematuria, recurrent macrohematuria and/or proteinuria (AMHP; proteinuria 0.

[Clinical features of 121 infants below 3 months of age with congenital syphilis].

Objective: To investigate the clinical features and diagnosis of infants under 3 months of age with congenital syphilis.

Method: Data of 121 infants below 3 months of age with congenital syphilis were collected from January 1997 to May 2007 at the authors' hospital. Their clinical features, laboratory findings and treatment were reviewed.

[Determination of trace selenium in milk cow serum with graphite furnace atomic absorption spectrophotometry].

Trace metal selenium in milk cow serums has determined by graphite furnace atomic absorption spectrometry with matrix modifier. It's found that addition the solution of 0.1% Ni(NO3)2 as matrix modifier, the ash temperature will increase up to 1,000 degrees C.

[Determination of Na in anticoagulant sodium heparin by flame atomic absorption spectrophotometry].

This paper report the development of the determination of Na in anticoagulant sodium heparin by flame atomic absorption spectrophotometry. The method is convenient and the results show good precision and accuracy. The relative standard deviation (RSD) is 2.