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Analysis of Urine and Body Fluids > Ch. 3 - Urine Preservatives & Types of Specimens (General) > Flashcards

Ch. 3 - Urine Preservatives & Types of Specimens (General) Flashcards

1
Q

What urine preservative does not interfere with chemical tests and prevents bacterial growth?

A

Refrigeration

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2
Q

What are the disadvantages of refrigeration?

A

Raises specific gravity by hydrometer

Precipitates amorphous phosphates and urates

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3
Q

What urine preservative preserves glucose and sediments well?

A

Thymol

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4
Q

What are the disadvantages of using thymol as a preservative?

A

It interferes with acid precipitation tests for protein

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5
Q

What urine preservative preserves protein and formed elements well and does not interfere with routine analyses other than pH? It keeps pH at about 6.0

A

Boric acid

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6
Q

The disadvantage of this urine preservative is that it may precipitate crystals when used in large amounts and can interfere with drugs and hormone analyses

A

Boric acid

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7
Q

What urine preservative is an excellent sediment preservative?

A

Formalin (formaldehyde)

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8
Q

The disadvantage of this urine preservative is that it acts as a reducing agent, interfering with chemical tests for glucose, blood, leukocyte esterase, and copper reduction.

A

Formalin (formaldehyde)

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9
Q

What urine preservatives do not interfere with routine tests?

A

Toluene

Phenol

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10
Q

The disadvantage of this urine preservative is that it floats on surface of specimens and clings to pipettes and testing materials.

A

Toluene

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11
Q

What urine preservative prevents glycolysis and is a good preservative for drug analysis?

A

Sodium flouride

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12
Q

The disadvantage of this urine preservative is that it inhibits reagent strip tests for glucose, blood, and leukocytes

A

Sodium flouride

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13
Q

It is a urine preservative that is convenient when refrigeration is not possible and has controlled concentration to minimize interference.

A

Commercial preservative tablets

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14
Q

The disadvantage of this urine preservative is that it may contain one or more of the preservatives including sodium flouride

A

Commercial preservative tablets

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15
Q

The disadvantage of this urine preservative is that it causes on odor change.

A

Phenol

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16
Q

It is a urine preservative that contains collection cup, C&S preservative tube or UA tube

A

Urine Collection Kit^6 (Becton Dickinson, Rutherford, NJ)

17
Q

It is a urine preservative that has no noted disadvantages

A

Urine Collection Kit^6 (Becton Dickinson, Rutherford, NJ)

Saccomanno Fixative

18
Q

It is a urine preservative that preserves bacteria and has the sample stable at room temperature for 48 hrs.

A

Gray C&S tube

19
Q

The disadvantage of this urine preservative is that it decreases pH. It should not be used when urine is below minimum fill line.

A

Gray C&S tube

20
Q

It is a urine preservative that is used on automated instruments

A

Yellow plain UA tube

21
Q

The disadvantage of this urine preservative is that it must be refrigerate within 2 hrs

A

Yellow plain UA tube

22
Q

It is a urine preservative that is stable for 72 hrs at RT and is instrument-compatible

A

Cherry red/yellow top tube

23
Q

The disadvantage of this urine preservative is that it may decrease bilirubin and urobilinogen if specimen is exposed to light and left at RT

A

Cherry red/yellow top tube

24
Q

It is a urine preservative that preserves cellular elements and is used for cytology studies

A

Saccomanno Fixative

25
Q

The type of specimen used for routine screening only

A

Random

26
Q

The type of specimen used for routine screening, pregnancy tests, and orthostatic protein

A

First morning

27
Q

The type of specimen used for diabetic screening/monitoring

A

Fasting (Second morning)

28
Q

The type of specimen used for diabetic monitoring

A

2-hour postprandial

29
Q

The type of specimen that is optional with blood samples in glucose tolerance tests

A

Glucose tolerance test

30
Q

The type of specimen used for quantitative chemical analysis

A

24-h (or timed)

31
Q

The type of specimen used for bacterial culture

A

Catheterized

32
Q

The type of specimen used for routine screening and bacterial culture

A

Midstream clean-catch

33
Q

The type of specimen that is bladder urine used for bacterial culture and cytology

A

Suprapubic aspiration

34
Q

The type of specimen used for prostatic infection

A

Three-glass collection

Analysis of Urine and Body Fluids (6 decks)

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