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RVT - Urinalysis > Week 1 & 2 > Flashcards

Week 1 & 2 Flashcards

1
Q

List the tests that are unreliable on the dipstick test

A

SlunG

SPECIFIC , leukocytes, urobilogen, nitrites, GRAVITY

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2
Q

What happens to the leukocytes in a urine sample if left to sit too long at room temperature?

A

Leukocytes decrease

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3
Q

What happens to erythrocytes if urine left too long at room temperature?

A

Hemolyze

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4
Q

What happens to the protein in urine if it sits too long at room temperature?

A

Increases

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5
Q

What happens to the turbidity of urine if it is left to sit out too long at room temperature?

A

Increases

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6
Q

If a sample needs to be preserved past the 12 hours refrigerated time, what can be done?

A

1 drop of formalin added to 30 mLs urine will preserve

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7
Q

Name the 2 basic types of centrifuge rotors

A

swinging bucket and fixed rotor

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8
Q

The specific gravity is off the scale on the refractometer. What can be done to get a reading?

A

Dilute 1:1 with distilled water. Recheck the reading on the refractometer. Multiply the last 2 digits by 2

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9
Q

What is the name of the stain used for an air-dried urine smear?

A

Diff-quick

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10
Q

What PH would you expect in feline cat urine and why?

A

6-7

More acidic due to high protein diet.

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11
Q

How long should urine be centrifuged for and at what speed?

A

3-5 min at 1000-2000rpm

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12
Q

How can we tell is a dark red urine sample is due to hematuria or hemoglobinuria?

A

Centrifuge the sample. If supernatant is yellow and red blood cells appear as sediment in the sample = hematuria
If sample remains red throughout = hemoglobinuria

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13
Q

List 3 potential causes of hematuria in urine

A

1) Inflammation/infection of bladder
2) how sample was obtained ie; cysto or catheterization
3) Blockage due to stone
4) bleeding in urinary or repro tract

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14
Q

What elements cause equine urine to turn cloudy?

A

Presence of mucous

Presence of calcium carbonate crystals

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15
Q

What is anuria?

A

Lack of urine production/output

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16
Q

What element in the urine causes it to turn an abnormal dark brown colour?

A

Myoglobinuria

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17
Q

When preparing a sample to be sent to a lab, what kind of container would you put the sample in for shipment and why? How to store while waiting?

A

Sterile container to avoid contamination
Opaque with tight fitting lid to avoid oxydization
Store in fridge no longer than 12 hours

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18
Q

Is an obstruction of the bladder considered an emergency and why?

A

Yes.

  • The bladder can rupture releasing toxins into the abdomen.
  • The overfull bladder is pushing toxins back up into the kidneys
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19
Q

What procedure would be performed to relieve the urinary obstruction?

A

Catheterization to empty urine out of the bladder as well as to try and flush stone/obstruction back up into the bladder

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20
Q

Would a urinalysis be performed on a blocked cat?

A

Yes

To determine if crystals are found and determine which kind so we know how to treat…ie sx removal or diet change

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21
Q

Could urine be obtained by cystocentesis on a blocked cat?

A

No. The bladder will rupture

Catheterization only

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22
Q

List 3 potential causes of obstruction in a blocked cat or dog?

A

Mucous plug
Stones
Crystals

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23
Q

Why should centrifuge tubes containing urine have a lid?

A

So air doesn’t break down particles an give an inaccurate sample

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24
Q

If centrifuge tubes not available, what can be used to spin down a urine sample in the centrifuge?

A

Red top blood tube

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25
Q

Why is it important to change the diff quick stain periodically?

A

Bacteria can grow in it falsifying your results

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26
Q

What are the most important factors to keep in mind when receiving a sample to perform a urinalysis on…

A

Run the sample within 1 hour!
If it can’t be run within an hour, refrigerate
Bring to room temp before analysis
Label your sample!

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27
Q

List the chemical properties that are obtained from a dipstick analysis 10 items

A

PBK PLUNGES

protein PH Nitrites Specific gravity
bilirubin Leukocytes Glucose
ketones urobilogen erythrocytes

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28
Q

To prepare a urine sample to be sent to the lab what steps should be taken?

A

Check Specific gravity first!
Package in appropriate sterile, opaque container with tight fitting lid
Label with hospital name, owner and pets name, date, what sample is and what for
Package in box with cooler pack to keep cool for transport
Fill out appropriate idexx/ahl paperwork

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29
Q

Besides the change in elements, what can happen to a urine sample if left out at room temperature too long?

A

Bacteria can grow in it

Crystals start to form

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30
Q

What test is performed to evaluate the renal tubules ability to concentrate or dilute urine?

A

Specific gravity

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31
Q

What does the term isosthernuria mean?

A

The specific gravity of the urine is the same as that of plasma

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32
Q

Why is urine collected first thing in the morning best for urinalysis?

A
  • more concentrated

- less likely to be affected by diet and water intake

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33
Q

What does the term polyuria mean?

A

Uncreased urine output/production

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34
Q

What does the blood test pad on the urine dipstick detect?

A

Erythrocytes/Myoglobin/Hemoglobin

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35
Q

If a urine sample is brown/red, what does this indicate the presence of?

A

Myoglobinuria

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36
Q

What type of protein does the protein test pad on a urine dip stick detect?

A

Albumin

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37
Q

After struggling to collect urine from a fractious cat, the urine is found to have glucosuria? Why is this and why would this appear in a healthy cat?

A

Cat stress= hyperglycemia causing glucose in the urine

Misreading of the dipstick - perhaps the dipstick wasn’t given an accurate amount of time before reading
Faulty dipstick - always check to make sure product not expired

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38
Q

Would equine urine be considered alkaline or acidic and why?

A

Due to the horse being an herbivore, the urine would be alkaline

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39
Q

Would a carnivore’s urine be alkaline or acidic?

A

Acidic

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40
Q

What is hemoglobin?

A

Protein found in blood cells

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41
Q

What is myoglobin?

A

Protein found in muscle cells

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42
Q

What does polydipsia mean?

A

Increased thirst/drinking

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43
Q

What change in specific gravity would you expect in a patient with polydipsia?

A

Low specific gravity from increased water intake

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44
Q

What change in urine specific gravity would you expect to find in an animal that is dehydrated?

A

Higher specific gravity

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45
Q

Name 2 common diseases that cause PU/PD in animals?

A

Diabetes mellitis

Diabetes insipidus

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46
Q

What does the type of crystal formation in urine depend on?

A

PH
Temperature
Concentration

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47
Q

What are 2 other names for struvite crystals?

A

Triple phosphate

Magnesium Ammonium phosphate

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48
Q

How is struvite crysalluria treated in dogs and cats?

A

Diet

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49
Q

How are calcium oxalate crystals treated in dogs and cats?

A

Surgical removal then diet

50
Q

What is the type of crystal seen in rabbit and horse urine?

A

Calcium carbonate

51
Q

What is the medical term for bladder stones?

A

Uroliths

52
Q

Name 5 contaminants that may be seen in urine

A 
Parasite eggs
pollen
mucus
fibers
crystals
53
Q

What are the 4 methods for collecting urine?

A

Free flow/catch
cystocentesis
catheterization
Bladder expression

54
Q

What is the advantage and disadvantage of cystocentesis?

A

Adv- good for culture and sensitivity testing, no distal urethra contamination
Dis- Blood possible in sample, animal must cooperate, invasive, increased skill level required

55
Q

What is the advantage and disadvantage to free flow urine for testing?

A

Adv- least intrusive, owners can do it to bring in sample

Dis- risk of distal urethral contamination

56
Q

What is the advantage and disadvantage of bladder expression?

A

Adv- less intrusive than cysto or catheter

Dis- difficult in cats, may injure bladder, reflux to the kidneys, not for obstructed animals, falsely increase rbc’s

57
Q

What is the advantage and disadvantage of catheterization?

A

Adv- good for samples that need to be sent for c&s

Dis- falsely increased rbc’s

58
Q

What are the 4 primary factors that may affect urine PH?

A

Diet
Fever
Starvation
Drugs/medications

59
Q

In what species is urine normally coloured reddish brown?

A

Rabbits

60
Q

What does specific gravity measure?

A

The density of urine compared to the density of water. Measures the solutes in the urine.

61
Q

What is the pigment made by the liver from dead or dying rbc’s?

A

Bilirubin

62
Q

What is important to remember about quality assurance with regard to urine dipsticks?

A
  • expiry dates : expires sticks will give false readings
  • follow manufacturers guidelines for when to read each pad
  • do not allow urine from one pad to run through urine of another pad
63
Q

Why is performing urinalysis important?

A

Its a inexpensive and easy preventative medicine

  • detects renal and pre-renal disease
  • May detect early stages of other diseases
64
Q

What is the role of the urinary system (5)?

A
  • excretion of waste
  • regulates blood pressure and volume
  • regulates solute concentration in circulation
  • regulates extracellular fluid PH
  • regulates synthesis of rbc’s
65
Q

In what area of the kidney are most of the renal corpuscles and convoluted tubules found?

A

Renal cortex

66
Q

Where in the kidney are the loops of henle of the nephrons located?

A

Medulla

67
Q

Approx how many nephrons can be in a kidney?

A

up to a million per kidney

68
Q

What is the physical difference between kidneys in cattle, horses and cats/dogs?

A

Cattle- multi-lobulated
Horses- smooth, one is heart shaped
cats/dogs - smooth and bean shaped

69
Q

What do nephrons do?

A
  • maintain water balance
  • maintain acid-based balance
  • maintain electrolyte balance
  • remove waste
70
Q

In what 4 ways is urine analyzed in clinic?

A

Physical evaluation
Chemical evaluation
Sediment evaluation
Specific gravity

71
Q

If urine is processed later in the day, how will the specific gravity be affected? How will the PH be affected?

A

SG- It will be more dilute due to water intake

PH- more alkaline

72
Q

If urine is processed early in the morning, how will specific gravity be affected? How will PH be affected?

A

SG - higher

PH- more acidic

73
Q

What factors can affect the ‘volume’ of urine?

A
  • fluid intake
  • external loses (panting)
  • environmental temp -hot day=fluid lose
  • food type- high or low sodium food
  • levels of physical activity
  • size of animal
74
Q

List the test pads that are found on a urine dipstick (10)

A

PBK PLUNGES

protein, bilirubin, ketones
pH, leukocytes, urobilogen, nitrites, glucose, erythrocytes(and wbc’s), specific gravity

75
Q

What ‘stain’ do we use in class to stain a urine slide (non-dried)

A

Sedi-stain

76
Q

What is a normal color that we see in urine while doing our physical analysis?

A

Light yellow to amber

77
Q

The presence of a brown/green color in urine is indicative of the presence of…..

A

Bile

78
Q

Red/brown color in urine is indicative of the presence of….

A

RBC’s of freefloating hemoglobin

79
Q

A turbid urine same is an indication of ‘what’ in the urine?

A

crystals

80
Q

When doing a physical examination of urine, what 5 words could be used to describe the ‘odour’ of the sample?

A 
Urinoid  (normal urine smell)
Strong
No odour
Ammonia
Fruity/sweet
81
Q

Is a specific gravity done before or after centrifuging?

A

After…..sg done with supernatent

82
Q

For accuracy of testing, what time of day will a urine sample yield the ‘best’ results?

A

First urine of the morning

83
Q

When analyzing sediment of a urine sample, what are some things we may see that could be considered normal?

A 
Small number of rbc's and wbc's
Casts
Epithelial cells
Sperm
small number of crystals
mucus
fat droplets
artifacts
84
Q

What volume of urine should we use for centrifuging?

A

3-5 mLs

85
Q

After centrifuging and removing supernatent, how much sediment fluid should we have to work with in the bottom of the tube?

A

0.5mL

86
Q

What factors could we see in the urine of a dog with diabetes mellitus?

A

Dilute urine due to excessive drinking
Glucose in urine
Ketones may be present in urine
May have ‘fruity/sweet’ smelling urine and breathe
…..these dogs often have chronic UTI’s and other infections due to a compromised immune system

87
Q

What factor may we see in a dog with diabetes insipidus?

A

VERY dilute urine due to excessive drinking

88
Q

What is ‘pyuria’ and what would we see in the urine to indicate this?

A

Pus in the urine

We would see the presence of WBC’s and bacteria

89
Q

What element from the urine stick decreases with light exposure?

A

Bilirubin

90
Q

Do formed elements in the urine increase or decrease in an

A.M sample? P.M sample?

A

A.M - Increase

P.M - decrease

91
Q

What 2 structures make up the renal corpuscle?

A

Glomerulus

Bowman’s capsule

92
Q

List the physical properties of urine that we record when doing a urinalysis

A
  • Colour
  • transparency/turbidity
  • odour
  • volume
  • Specific gravity
93
Q

What is a normal volume of urine produced by a dog

per kg/day

A

20-100mL/kg/day

94
Q

What is a normal volume of urine for a cat to produce in a day?

A

10-20mL/kg/day

95
Q

‘sthen’ as in hypersthenuria means…..

A

strength

hypersthenuria = Specific gravity > 1.012

96
Q

What is the difference between the physical and the chemical properties of urine?

A

Physical properties are the observations we can make without the aid of a microscope or chemical reagents.

Chemical properties are observed by use of the aid of appropriate chemicals/reagents.

97
Q

What are the 6 components of the urinary system?

A

Left and right kidney
Left and right ureter
Bladder
Urethra

98
Q

The kidneys of what animal have a lobulated appearance?

A

Cow

99
Q

The hilis in the urinary system is….

A

The indented area on the side of the kidney

100
Q

The ___________ is the basic functioning unit of the kidney?

A

Nephron

101
Q

The urinary bladder is lined with what kind of cells?

A

Transitional epithelium

102
Q

The term that describes a decrease in the volume of voided urine over a 24hr period is….

A

Oliguria

103
Q

The term that describes an increase in the amount of urine being produced in a 24 hr period is….

A

Polyuria

104
Q

The preferred method of specimen collection for urine samples that need a culture and sensitivity is…….

A

Cystocentesis

105
Q

What test should be performed before refrigerating a urine sample?

A

Specific gravity

106
Q

The term that describes an increase in the frequency of urination over a 24hr period is…..

A

Pollakiuria

107
Q

The term that describes the absence of urine production is….

A

Anuria

108
Q

Urine that appears __________has a low specific gravity

A

Clear

109
Q

Urine that appears __________has a high specific gravity

A

Yellowish/brown

110
Q

Which test is used to confirm the presence of bilirubin when detected on a dipstick test?

A

Ictotest

111
Q

When are ketones produced in the body?

A

Produced during fat metabolism

112
Q

What diseases can lead to ketonuria?

A 
Diabetes mellitus
Long term anorexia
Starvation
Hypoglycemia ( seen in late term pregnancy with cattle)
Animals nursing their young
113
Q

How are ketones detected on the dipstick pad?

A

Nitroprusside reaction - can detect acetoacetic acid and acetone….but not beta-hydroxbutyrate ( which is 1st ketone produced in ketosis)

114
Q

What happens if there is excessive ketone production in the body?

A

Toxicity - CNS depression and acidosis

115
Q

What are ketones?

A

Produced during fat metabolism. Made up of acetone and acetoacidic acid and beta-hydroxybutyric acid

116
Q

Why would we see glucose in a urine sample? What is occurring in the renal system?

A

Glucose is normally reabsorbed into the body from the renal tubules. However, if the body already has too much glucose, it won’t reabsorb and the glucose then travels to the bladder. Therefore already too much glucose in system= disease/hyperglycemia

117
Q

What chemical is used in a reagent strip to test for glucose?

A

Glucose oxidase

118
Q

What can affect the presence of glucose in the urine?

A

High concentrations of vitamin C in the body (ie; pet on a supplement)
If urine is cold
If dipstick is expired

119
Q

What is a Bence-Jones protein?

A

It is a globulin protein found in urine that is indicative of certain cancers. We can not detect it in our tests.

120
Q

Explain the terms
Isosthenuria
Hyposthenuria
Hypersthenuria

A

Isosthenuria - a specific gravity equal to that of plasma
Hyposthenuria - a low specific gravity
Hypersthenuria - a high specific gravity

121
Q

Why is horse and rabbit urine not transparent?

A

Presence of mucous and calcium carbonate crystals

122
Q

What component of horse and rabbit urine gives it its red/brown color?

A

Porphyrin pigments

RVT - Urinalysis (1 decks)

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