Laboratory Report on Urine Examination
When testing urine the test results may provide information regarding the status of carbohydrate metabolism and kidney function.
The kidney glomeruli act as ultrafilters for the plasma protein; however as much as 150 mg/dl of protein may normally be excreted into the urine. In glomerular proteinuria, an increase in glomerular permeability occurs, resulting in an increase of urine proteins. High urine protein concentration therefore may indicate proteinuria.
Blood glucose concentration above the renal threshold will overflow into the urine. This situation normally arises in diabetes patients. In renal diabetes, the renal threshold is reduced to the point where sugar appears in the urine despite normal levels being present in the blood. In both situations, monitoring of urine glucose becomes important.
In the following exercises it will be determined, by using three simulated urine specimens, what color, pH, specific gravity, glucose, and protein has on urine.
Urine Normal is normal, and Urine high (positive) on all tests. In part 2, unknown simulated urine will be tested and determine the probable disorders.
Materials and Methods: Part 1
Color: Record the color of each simulated urine (Low, Normal, and High) in Table 1.
pH: 1. Obtain three pH indictor strips and label each to match the containers (L,N,H).
2. Test each simulated urine (Low, Normal, and High) by dipping the appropriate pH strip into it
three consecutive times.
3. Shake off excess liquid and compare the color of the strip to the colors on the pH chart. The
color that most closely matches your strip corresponds to the pH of the simulated urine.
4. Record each pH in Table 1.
The pH of normal urine averages 6.0, which is slightly acidic. Certain foods and diseases that can affect urine pH.
1. The instructor will...