Reagentless Estimation of Urea and Creatinine Concentrations Using Near-Infrared Spectroscopy for Spot Urine Test of Urea-to-Creatinine Ratio

Urea and creatinine concentration, the urea: creatinine ratio

This is the second of two articles that together aim to explore current understanding of the clinical value of measuring serum/plasma urea concentration. The main focus of the first article [1] was physiological topics, such as urea production and renal processing of urea. The causes of increased and reduced plasma/serum urea concentration were also discussed. The main focus of this second arti...

Urea and creatinine excretion

Plasma urea and creatinine concentrations and urea and creatinine clearances and excretion were measured in a sample of 40 infants of 25*5-33 weeks' gestation, birth weight 720-2000 g, between the ages of 0 5 and 33 days. Creatinine excretion rate was between 60 and 120 gmol/kg/day in the first five postnatal weeks (mean 90.5) and was independent of sex or growth retardation. This can be used i...

Comparison of spot urine protein creatinine ratio with 24 hour urine protein for estimation of proteinuria.

The objective of our study was to evaluate and standardise the method of spot (random) urine protein creatinine ratio (UP/C) for estimation of proteinuria. The study contained 241 study participants in a tertiary care hospital inclusive of 208 cases and 33 normal volunteers. The 24 hour urine protein estimation was done on 24 hour urine samples and UP/C ratio was calculated on random urine samp...

Urinary Urea/creatinine Ratio in Healthy and Malnourished Children.

High urea and creatinine concentrations and urea transporter B in mammalian urinary tract tissues.

Although the mammalian urinary tract is generally held to be solely a transit and storage vehicle for urine made by the kidney, in vivo data suggest reabsorption of urea and other urine constituents across urinary tract epithelia. To determine whether urinary tract tissue concentrations are increased as a result of such reabsorption, we measured urea nitrogen and creatinine concentrations and d...