Leukogram/Thrombogram

Question 1

Neutrophils should be the predominant WBC in
the blood. How would you interpret a
neutrophil concentration of 80% in a dog?

Answer 1

That value must be interpreted in the context of the
[WBC]

Question 2

What cell types are not reliably identified by an
automated hematology analyzer and indicates
that a manual WBC differential should be
performed?

Answer 2

Basophils, band neutrophils, nRBC

Question 3

Basophils will count as a part of

Answer 3

[WBC]

Question 4

band neut will be counted as

Answer 4

neutrophils

Question 5

nRBC will be counted as

Answer 5

lymphocytes

Question 6

What 2 values are used to calculate a
thrombocrit (AKA plateletcrit)?

Answer 6

MPV and [PLT]

Question 7

How can you estimate platelet
concentration on a blood smear?

Answer 7

Count the average number of platelets per 100x
field and multiply by 15,000/uL

Question 8

Quantitative Data of WBC in CBC

Answer 8

total concentration = specific WBC % and concentrations for neuts, lymphocytes, monos, eos, basos

Question 9

Qualitative data of WBC/platelets

Answer 9

blood smear

Question 10

Quantitative Data of platelets in CBC

Answer 10

Concentration, MPV, Pct

Question 11

Thrombogram?

Answer 11

Platelet Evaluation

Question 12

Platelet Concentration

Answer 12

of platelets per volume of blood

Question 13

is [platelet] reliable if there’s platelet clump?

Answer 13

noooo

Question 14

Hemocytometer?

Answer 14

rare platelet count method

Question 15

MPV?

Answer 15

Mean Platelet Volume measured by automated..

Question 16

How does storage affect MPV values?

Answer 16

Stored platelets (in lab samples or transfusion units) tend to swell, which falsely increases MPV

Question 17

Pct?

Answer 17

Plateletcrit

Question 18

Plateletcrit

Answer 18

% volume of blood filled by platelets

Question 19

Why can’t analyzers directly measure Pct?

Answer 19

the value is too small to measure directly

Question 20

How is Pct measured?

Answer 20

calculated from MPV and platelet concentration.

Question 21

How does platelet size relate to function?

Answer 21

Larger platelets are stronger (more metabolically and enzymatically active) than smaller ones

Question 22

What information can a blood smear provide about platelets?

Answer 22

for clumps, concentration estimate, size, inclusions

Question 23

Leukogram?

Answer 23

WBC Evaluation

Question 24

[WBC] measured by

Answer 24

automated hematology analyzer

Question 25

[WBC] ?

Answer 25

total # of leukocytes per volume of blood

Question 26

WBC differential count?

Answer 26

% of each WBC type