What are the methods of estimation of specific gravity of urine?
Introduction: The urine specific gravity is commonly used in clinical practice to measure the renal concentration/dilution ability. Measurement can be performed by three methods: hydrometry, refractometry and reagent strips.
How is specific gravity used in urinalysis?
Urine specific gravity measures how many particles are in a person’s urine compared with water. The higher the number of particles in the urine, the higher the urine specific gravity. If there are more particles than in water, urine will be denser, and the specific gravity will be higher.
Which tool do you use to evaluate the accurate urine specific gravity?
In conclusion, our results suggest that the refractometer is a reliable measure of urine specific gravity. In contrast, the hydrometer and reagent strips were not reliable, nor were they valid measures of urine specific gravity when compared with refractometry.
What is Leu in urine test?
Leukocyte esterase is a screening test used to detect a substance that suggests there are white blood cells in the urine. This may mean you have a urinary tract infection. If this test is positive, the urine should be examined under a microscope for white blood cells and other signs that point to an infection.
Can urine specific gravity be less than 1?
To put it another way, the specific density of water would be 1.000. Ideally, urine specific gravity results will fall between 1.002 and 1.030 if your kidneys are functioning normally. Specific gravity results above 1.010 can indicate mild dehydration. The higher the number, the more dehydrated you may be.
Can I use a refractometer instead of a hydrometer?
It works by measuring the refraction of light through the liquid and calculating the sugar content based on that measurement. There are several advantages to using a refractometer instead of a hydrometer, especially in that the refractometer does not suffer from many of the same shortcomings of the hydrometer.
What is the specific gravity of urine in refractometer?
The refractometer gives values for specific gravity comparable to those obtained by other methods with the advantage of using only one drop of urine. Results greater than 1.035 should be reported as > 1.035. Critical Values are up to the assessment of the physician. IX. Limitations
How do you measure specific gravity on a veterinary refractometer?
Veterinary clinical refractometers typically have two or three scales (figure 2). The scale used to measure specific gravity is normally found on the right hand side and is typically labelled as U.G. (urine gravity) or S.G. (specific gravity) with a range of 1.000-1.030 or 1.000-1.040 Figure 2.
How to use a refractometer to test urine control?
Once a day, a normal and abnormal urine control should be tested on the refractometer. a. On initial use, remove the controls from the refrigerator and allow to reach room temperature prior to testing. b. Remove cap and invert bottle.
How do you measure specific gravity in urine?
Urine Specific Gravity. Here is a method of analyzing urine specific gravity using a refractometer. purpose: monitoring hydration levels to prevent dehydration is important for optimizing performance. Urine specific gravity is a scientific measure of hydration by measuring the density (concentration) of a urine sample.