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CLINICAL MICROSCOPY > Preservation > Flashcards

Preservation Flashcards

1
Q

specimen should be delivered to the laboratory promptly and tested within

A

2 HRS

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2
Q

If it cannot be delivered and tested within 2 hours it should be

A

Refrigerated
Added with preservatives

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3
Q

Physical Preservation

A

Refrigeration (2-8 deg)
Freezer

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4
Q

Chemical Preservation

A

a. formalin
b. Thymol
c. Boric acid
d. Toluene/Tuluol
e. Sodium fluoride/Benzoic acid
F. Phenol
g. HCl
h. H2SO4
i. Saccamano’s fixative

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5
Q

Chemical Preservation:

Addis count

A

Formalin

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6
Q

Chemical Preservation:

Culture

A

Boric Acid

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7
Q

Chemical Preservation:

Glucose

A

Sodium fluoride
benzoic acid

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8
Q

Chemical Preservation:

Catecholamines

A

HCl

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9
Q

Chemical Preservation:

Cytology

A

Saccamano’s fixative

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10
Q

URINE PRESERVATIVES:

Advantage:
Does not interfere with chemical test

Disadvantage:
Precipitates amorphous urates and phosphates

Additional Info:
Prevents bacterial growth in 24 hrs

A

Refrigeration

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11
Q

URINE PRESERVATIVES:

Advantage:
Glucose and Sediments

Disadvantage:
interferes acid precipitation (Protein)

Other:

A

Thymol

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12
Q

URINE PRESERVATIVES:

Advantage:
Proteins and formed elements

Disadvantage:
precipitate crystals when used in large amounts

Other:
maintains pH @6.0

A

Boric Acid

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13
Q

URINE PRESERVATIVES:

Advantage:
Excellent sediment preservative

Disadvantage:
-acts as reducing agent
- Interfere:
glucose
blood
leukocyte esterase
copper reduction

Other:
rinse container to preserve cells and cast

A

Formalin

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14
Q

URINE PRESERVATIVES:

Advantage:
does not interfere with routine tests

Disadvantage:
floats on surface and clings to pipet

Other:
Preserves ketones, proteins, reducing substances

A

Toluene

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15
Q

URINE PRESERVATIVES:

Advantage:
- prevents glycolysis
- drug analyses

Disadvantage:
- Inhibits reagent strip
Glucose
Blood
Leukocytes

Other:

A

Sodium Fluoride

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16
Q

This may used instead of sodium fluoride for reagent strip

A

Sodium benzoate

17
Q

URINE PRESERVATIVES:

Advantage:
does not interfere with routine test

Disadvantage:
odor change

Other:
use 1 drop per ounce of specimen

A

Phenol

18
Q

URINE PRESERVATIVES:

Advantage:
convenient when refrigeration is not possible

Disadvantage:
may contain 1 or more preservatives
Other:

A

Commercial preservatives

19
Q

URINE PRESERVATIVES:

Advantage:
contains collection cup, C&S preservative, UA tube

A

Urine Collection Kit

20
Q

URINE PRESERVATIVES:

Advantage:
- sample stable at room temperature @ 48hrs
- preserves bacteria

Other:
uses Boric acid
may not be used UA

A

Gray C&S Tube

21
Q

URINE PRESERVATIVES:

Advantage:
used on automated instruments

Disadvantage:
must refrigerate within 2 hrs

Other:
Round/Conical bottom

A

Yellow plain UA

22
Q

URINE PRESERVATIVES:

Advantage:
stable for 72 hours @Room temperature

Disadvantage:
If left @RT and light; decreased in Bilirubin and Urobilinogen

Other:
Preservative is SODIUM PROPIONATE

A

Cherry Red/Yellow top tube

23
Q

URINE PRESERVATIVES:

Advantage:
Cellular elements
Cytology studies

A

Saccamano’s fixatives

CLINICAL MICROSCOPY (24 decks)

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