Clinical Final Flashcards
What goes hand in hand with casts in urine?
proteinuria
What could cause a false negative for blood on a dipstick?
contamination with betadine
What crystals appear in acid urine?
uric acid, calcium oxalate, amorphous rates, calcium sulfate, sodium urates and cholesterol
What crystals appear in alkaline urine?
triple phosphate, amorphous phosphate, calcium carbonate, calcium phosphate, and ammonium biurate
What is the principle of the reaction on the N-multistix?
at the acid pH of the reagent area, nitrate reacts with p-arsanilic acid to form a diazonium compound, which couples with 1,2,3,4-tetrahydro-benzo(h)quinolin-3-ol to produce a pink color
How may amorphous be dispersed so other sediment may be evaluated?
dissolved in alkali or acetic acid and heated to 60C
What organism may be found n the urine of diabetics
Candida albicans
What is thymol used for?
preserves sediment and inhibits bacterial growth
What is formalin used for?
cellular preservative
What is the clinical significance of bilirubin
liver disease or biliary obstruction
What is the clinical significance of urobilinogen
liver disease
What is the normal SG of urine
1.003-1.035
What is the significance of ketone bodies
diabetes mellitus, starvation, alcoholism, sever exercise, loss of carbs, fat utilization
How is the urine osmolality determined
freezing point or vapor depression
What is the Addis count
used to follow progress of renal disease; WBCs, RBCs and casts counted over a 12 hour period of fasting
