Urinalysis Flashcards
What would you look for on low magnification (10x)?
- Crystals
- Casts
- Epithelial cells
What would you look for on high magnification (40x)?
- RBC
- WBC
- Crystals
- Bacteria
A normal urinalysis consists of less than ____ RBCs / 40x field.
5
A normal urinarlysis consists of less than ____ WBCs / 40x field.
5
True or False: RBC count will be higher in cystocentesis than free catch cystocentesis.
TRUE
True or False: WBC count will be higher in cystocentesis than free catch urinalysis.
FALSE: WBC higher in free catch urine.
Crystal formation in the urine is dependent on what 4 factors?
- pH
- Concentration
- Solutes
- Diet
What pH urine are struvite crystals found in?
Alkaline
What pH urine are calcium oxalate dihydrate crystals found in?
Acidic
Can struvite crystals be present in normal urine?
Yes
Can calcium oxalate dihydrate crystals be present in normal urine?
Yes
Which type of crystals are normal in horses and rabbits?
Calcium carbonate (if these are not present, THAT is pathogenic)
In what 2 conditions might you see bilirubin crystals?
- Hematuria
2. Bilirubinuria
When would you see calcium oxalate monohydrate crystals?
Ethylene glycol toxicosis
What is the chemical composition of “thorn apple” crystals?
Ammonium biurate
In which 2 species are ammonium biurate crystals normal?
- Dalmatians
2. Bulldogs
What 3 crystal types suggest liver failure certain breeds of dogs?
- Ammonium biurate
- Urate
- Tryosine
In which breeds would you expect to find cystine crystals?
- Rottweiler
- Dachshund
- Newfoundland
- Bulldog
Would you expect cystine crystals more in females or males?
Males
If you have a waxy cast, what is your concern?
End-stage renal failure
If you see leukocyte casts, what is your top differential?
Pyelonephritis
If you see erythrocyte casts, what is your top differential?
Coagulopathy
What type of drugs cause urinary crystals?
- Sulfa drugs
- Penicillins/beta lactams
- Fluoroquinolones
Which fungi is most commonly seen in the urinary bladder?
Candida
What is the kidney worm of the dog?
Dioctophyma
What is the kidney worm of the pig?
Stephanurus
What is the urinary bladder worm of the dog and cat?
Capillaria
Which of the following is sterile: cystocentesis, catheterization, free catch?
- Cystocentesis
2. Catheterization
When would you want to collect urine to best assess concentrating ability?
Early morning
When would you want to collect urine to best assess mineral excretion?
Postprandial (3-6 hours)
When would you want to collect urine to best assess glucose excretion?
Postprandial (3-6 hours)
When would you want to collect urine to best assess crystalluria?
Postprandial (3-6 hours)
Red urine
- RBCs
- Free hemoglobin
- Free myoglobin
Red/brown urine
- Rbcs
- Free hemoglobin
- Free myoglobin
- Horse = catecholamines
Brown/black urine
Methemoglobin
Yellow/orange urine
Bilirubin
Yellow/green urine
Bilirubin and biliverdin
Fluorescent
- Antifreeze
2. Porphyrins
Urine is normally transparent, with the exception of which species?
- Horses
2. Rabbits
Turbid urine is due to what?
Increased formed elements in the urine
What are formed elements?
- Bacteria
- Lipid
- RBC
- WBC
- Epithelial cells
- Debris
- Crystals
Smell of urine: Ammonia
Bacterial cystitis
Smell of urine: Ketotic
Ketoacidosis
Smell of urine: Uremic
Renal failure
What 3 soluble elements artificially elevate USG?
- Glucosuria
- Hetastarch
- Proteinuria
What is the isosthenuric range?
1.007 - 1.013
What does isosthenuric urine suggest?
There is NO concentrating or diluting capacity
What does hyposthenuric urine suggest?
There is still tubular function present
What condition is commonly associated with hyposthenuria?
Diabetes insipidus
What is the normal pH of a carnivore’s urine?
6 - 7
What is the normal pH of a herbivore’s urine?
7.5 - 8.5
Exposure of urine to air increases, decreases, or does nothing to the pH of the urine?
Increases
What is the glucose reabsorption threshold in the dog, cat, horse, and cow?
Cat = 300
Dog = 200
Horse = 150
Cow = 100
What 3 conditions cause hyperglycemic glucosuria?
- Diabetes mellitus
- Catecholamines
- Hypercortisolemia
Would urine glucose be increased or decreased with proximal tubular damage?
Neither, euglycemic glucosuria
Would urine glucose be increased or decreased with a congenital tubular defect like fanconi syndrome?
Neither, euglycemic glucosuria
Which ketones are detected via urine dipstick?
- Acetone
2. Acetoacetate
Which ketones are NOT detected via urine dipstick?
Beta-hydroxybutyrate
What does a ketonuria suggest?
Negative energy balance
Which urine value is inaccurate when the urine is either pigmented or sits out too long in the light?
Bilirubin
What does bilirubinuria suggest?
Hyperbilirubinemia
What does hemaglobinuria suggest?
Hemolysis
What does myoglobinuria suggest?
Muscle damage