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Hematology 1 > Laboratory: WBC and RBC Counting > Flashcards

Laboratory: WBC and RBC Counting Flashcards

1
Q

Cell count is higher in adults compared to newborns.

WBC Counting

RBC Counting

Both

Neither

A

Neither

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2
Q

Inverted “L” rule is applied in counting

WBC Counting

RBC Counting

Both

Neither

A

Both

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3
Q

There are 2 basic methods in counting: the manual method and using Coulter counter analyzers.

WBC Counting

RBC Counting

Both

Neither

A

Both

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4
Q

Diluting fluid is a weak acid solution.

WBC Counting

RBC Counting

Both

Neither

A

WBC Counting

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5
Q

Sample can be both capillary blood and venous blood

WBC Counting

RBC Counting

Both

Neither

A

Both

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6
Q

Depth factor = 10

WBC Counting

RBC Counting

Both

Neither

A

Both

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7
Q

HPO is used in counting

WBC Counting

RBC Counting

Both

Neither

A

Both

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8
Q

Cell count is corrected in the presence of NRBC

WBC Counting

RBC Counting

Both

Neither

A

WBC Counting

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9
Q

Increased following strenuous physical activity.

WBC Counting

RBC Counting

Both

Neither

A

Both

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10
Q

Cells are counted in each 5 small square in the upper-left large corner square.

WBC Counting

RBC Counting

Both

Neither

A

Neither

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11
Q

4 drops of mixture is discarded after mixing.

WBC Counting

RBC Counting

Both

Neither

A

Both

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12
Q

Area counted factor = 25/5

WBC Counting

RBC Counting

Both

Neither

A

RBC Counting

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13
Q

Whole blood is aspirated up to 0.5 mark

WBC Counting

RBC Counting

Both

Neither

A

Both

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14
Q

Source of error: Improper mixing

WBC Counting

RBC Counting

Both

Neither

A

Both

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15
Q

Cells are counted in 4 large corner squares

WBC Counting

RBC Counting

Both

Neither

A

WBC Counting

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16
Q

Diluting fluid: Formol citrate

WBC Counting

RBC Counting

Both

Neither

A

RBC Counting

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17
Q

Diluting fluid is aspirated up to 101 mark

WBC Counting

RBC Counting

Both

Neither

A

RBC Counting

18
Q

In healthy individual, WBC falls in the range of _

A

4.0-11.0 x 10^9/L

19
Q

WBC above 11.0 x 10^9 L is termed _

A

Leukocytosis

20
Q

White count below normal is known as _

A

Leukopenia

21
Q

WBC count is slightly higher in the afternoon than in the
morning. True or False?

A

True

22
Q

WBC may drop below normal values in parasitic infection, radiation and certain drug therapy. True or False?

A

False

Rationale: WBC may drop in viral diseases, radiation and drug therapy

23
Q

Components of Turk’s diluting fluid

A

Gentian violet
Glacial acetic acid
Water

24
Q

2% acetic and 1% HCl along with Turks’s diluting fluid is used as WBC diluting fluid. True or False?

A

True

25
Q

Kimwipes is a brand of hematocytometer?

A

False

Rationale: Brand of cloth/wipes

26
Q

Principle of WBC Count: Whole blood is mixed with a weak acid solution to dilute the blood and hemolyze the WBCs

A

False

Rationale: RBCs should be the one being hemolyzed

27
Q

How many drops should be discarded before usage?

A

4 drops

28
Q

Reported unit in WBC count

A

cells/uL

29
Q

In leukopenia, blood should be drawn up until the _ mark?

A

1

30
Q

In leukocytosis, blood should be drawn up until the _ mark?

A

0.5

31
Q

Normal RBC range for adult males

A

4.2-6.0 x 10^12/L

32
Q

Normal RBC range for adult females

A

3.6-5.6 x 10^12/L

33
Q

Normal RBC range for newborn

A

5.0-6.5 x 10^12/L

34
Q

Strenuous physical activity tends to _ the red count

A

Increase

35
Q

_ red cell count is found in polycythemia vera and secondary polycythemia

A

Increased

36
Q

There are two basic methods used for counting red blood cells

A

The manual method
Electronic cell counter

37
Q

These solutions are examples of what fluid?

NSS
3.8% sodium citrate
Dacies/Formol citrate
Hayem’s
Toisson’s
Bethell’s
Gower’s

A

Red Count Diluting Fluid

38
Q

To facilitate counting and promote lysis of the red blood cells, whole blood is diluted with an isotonic diluting fluid. True or False?

A

False

Rationale: Isotonic diluting fluid should prevent lysis of RBC

39
Q

In polycythemia/erythemia, blood should be drawn up until the _ mark?

A

0.3

40
Q

In anemia, blood should be draw up until the _ mark?

A

1

Hematology 1 (13 decks)

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