urinalysis quiz 1

what is the composition of urine?

ultrafiltrate of plasma.

1. 94% water

2. Organic solutes

3. inorganic solutes

4. hormones, vitamins, and medications

what are the three organic solutes found in urine?

urea, creatinine, uric acid

what are three primary inorganic solutes in urine?

chloride, sodium, potassium

also calcium, magnesium, ammonia, phosphates, and sulfates

what is urea?

a major waste product produced in the liver from the breakdown of protein and AA

what is creatinine?

excretion from the muscle mass

what is uric acid?

nitrogenous waste produced from breaking down purines (food and cell destruction)

What might affect urinary composition?

dietary intake, physical activity, body metabolism, endocrine function, and body position

What solutes can you test for to identify an unknown substance as urine?

urea and creatinine. they may be found in other fluids but are at much higher volumes in urine

what is the clinical usefulness of urinalysis?

provides information on state of the kidney and urinary tract as well as metabolic or nonrenal systemic disorders

What are the five main methods of urine collection?

1. routine void

2. midstream clean catch

3. catheterized

4. suprapubic aspiration

5. pediatric

When should a midstream “clean catch” be preformed?

routine bacterial screening