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Table 1 Renal functions and related clinical or laboratory parameters

From: Renal co-morbidity in patients with rheumatic diseases

Function

Clinical or laboratory parameter

Excretion

Serum levels of creatinine, blood urea nitrogen, uric acid

Filtration barrier

Proteinuria as determined by dipstick test and/or by urinary protein/creatinine ratio, urinary albumin/creatinine ratio

 

Hematuria as determined by dipstick test and/or microscopy

Sodium balance

Blood pressure and edema to be evaluated by clinical examination

Water balance

Serum sodium concentration, serum osmolarity

Acid-base status

Serum bicarbonate (and chloride) concentration

Renal hormones

Erythropoietin: hemoglobin level 1,25-(OH)2 vitamin D: serum calcium/phosphorus Concentrations, iPTH

  1. iPTH, intact parathyroid hormone.