The Test Sample. What is being tested? Osmolality is a measure of the number of dissolved particles in a fluid. The osmolality test reflects the concentration of substances such as sodium, potassium, chloride, glucose, and urea in a sample of blood, urine, or sometimes stool.
https://labtestsonline.org/understanding/analytes/osmolality/tab/sample
In Science. A material that will not dissolve in another is known as insoluble. Wax will not dissolve in water, rocks will not disolve in alcohol, and so on. Caffiene is soluble in liquid… CO2 for example. Differential solubility is a very powerful technique in process chemistry and also in analysis. Teflon (polytetrafluorethylene) is a fairly inert substance, but starts to degrade above 200oC.
http://www.answers.com/Q/The_concentration_of_dissolved_substances_in_urine_is_indicated_by_its
Glomerular Filtration Rate(GFR) This test is a measure of how well the kidneys are removing wastes and excess fluid from the blood. It may be calculated from the serum creatinine level using your age, weight, gender and body size. Normal GFR can vary according to age (as you get older it can decrease). The normal value for GFR is 90 or above.
https://www.kidney.org/atoz/content/kidneytests
Interpreting the Results of Your Urine Concentration Test. The laboratory will test how concentrated your urine is. More concentrated urine means that there are more solutes and less water in the sample. Solutes are dissolved particles, such as sugars, salts, and proteins.
http://www.healthline.com/health/urine-concentration-test
Adulterated Specimen. Samples with pH <3.0 or >11.0 are reported as adulterated. An adulterated specimen is a urine specimen containing a substance that is not a normal constituent of urine or a specimen containing an endogenous substance not present at a normal physiological concentration.9.
https://www.practicalpainmanagement.com/resources/diagnostic-tests/specimen-validity-testing
Urine osmolality is used to measure the number of dissolved particles per unit of water in the urine. As a measure of urine concentration, it is more accurate than specific gravity. Urine osmolality is useful in diagnosing renal disorders of urinary concentration and dilution and in assessing status of hydration.
http://emedicine.medscape.com/article/2088250-overview
A urine concentration test determines how well your kidneys are functioning. The test may be used to test your kidneys’ response to: too much fluid intake (water loading) too little fluid intake (dehydration) a hormone that should concentrate your urine, antidiuretic hormone (ADH)
http://www.healthline.com/health/urine-concentration-test
Sometimes referred to as a mid-void. It requires special cleansing of the external genitalia to avoid contamination of organisms residing near the external opening of the urethra. Is collected and submitted for culturing to identify the number and types of pathogens present in urine. timed urine specimen.
https://quizlet.com/14511916/chapter-47-medical-assisting-flash-cards/
A urine concentration test can also be used to evaluate: 1  dehydration. 2  kidney failure. 3  heart failure.  other hormone 1  problems. complications of a urinary tract infection.
http://www.healthline.com/health/urine-concentration-test
SG is a measurement of the density of a liquid compared to the density of water. It measures the concentration of dissolved particles in the sample. Decreased SG values may be due to excessive fluid intake, renal failure, diabetes insipidus, as well as a variety of other factors.
https://www.practicalpainmanagement.com/resources/diagnostic-tests/specimen-validity-testing
what test that measures the concentration of dissolved substances in urine
The Osmolality test measures the concentration of dissolved substances in urine. Osmolality test measures the concentration of dissolved substances in urine.