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AUBF > 1.2 URINE PRESERVATIVE - LEC > Flashcards

1.2 URINE PRESERVATIVE - LEC Flashcards

1
Q

Types of urine preservatives

A

Refrigeration
Acids
Formalin
Sodium fluoride
Commercial preservative tablets
Urine collection kits
Culture and sensitivity tubes
Yellow UA plus tube
Cherry red/yellow preservative plus tube

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2
Q

Advantage of Refrigeration

A

Does not interfere with chemical tests

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3
Q

Advantages of Acids

A

Prevents bacterial growth and metabolism

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4
Q

Advantages of Formalin

A

Excellent sediment preservative

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5
Q

Advantages of Sodium fluoride

A

Good preservative for drug analyses

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6
Q

Advantages of Commercial preservative
tablets

A

Convenient when refrigeration not possible

Have controlled concentration to minimize interference

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7
Q

Advantages of Urine Collection Kits

A

Contains collection cup, transfer straw, culture and sensitivity (C&S) preservative tube, or UA tube

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8
Q

Advantages of Light gray and gray
C&S tube

A

Specimen stable at room temperature (RT) for
48 hours

prevents bacterial growth and
metabolism

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9
Q

Advantages of Yellow UA Plus tube

A

Use on automated instruments

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10
Q

Advantages of Cherry red/yellow Preservative Plus tube

A

Specimen stable for 72 hours at RT;
instrument-compatible

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11
Q

Disadvantages of Refrigeration

A

Precipitates amorphous phosphates and urates

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12
Q

Disadvantages of Acids

A

Interferes with analysis of drugs and hormones

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13
Q

Disadvantages of Formalin

A

Acts as a reducing agent,

interfering with chemical tests for glucose, blood, leukocyte esterase, and copper reduction

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14
Q

Disadvantages of Commercial preservative
tablets

A

Check tablet composition to determine possible effects on desired tests

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15
Q

Disadvantages of Sodium fluoride

A

Inhibits reagent strip tests for glucose, blood, and leukocytes

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16
Q

Disadvantages of Light gray and gray
C&S tube

A

Do not use if urine is below
minimum fill line

17
Q

Disadvantages of Yellow UA Plus tube

A

Must refrigerate within 2 hours

18
Q

Disadvantages of Cherry red/yellow
Preservative Plus tube

A

Must be filled to minimum fill line
Bilirubin and urobilinogen may be decreased if specimen is exposed to light and left at RT

19
Q

Prevents bacterial growth for 24 hours

A

Refrigeration

20
Q

Keeps pH at about 6.0 Can be used for transport of urine cultures

A

Acids

21
Q

Rinse specimen container with _________ to preserve cells and casts

A

formalin

22
Q

Light and gray C and S tube preservatives

A

boric acid,
sodium borate
sodium formate

23
Q

Round or conical bottom, no preservative tube

A

Yellow UA Plus tube

24
Q

Cherry red/ yellow preservative plus tubes preservatives

A

sodium propionate,
ethyl paraben,
chlorhexidine

25
Q

Urine Collection Kits examples

A

Becton,
Dickinson,
Rutherford,
NJ

26
Q

Acids examples

A

boric acid,
HCL,
acetic acid,
tartaric acid

AUBF (9 decks)

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