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Lab > QBC Star Instrument > Flashcards

QBC Star Instrument Flashcards

1
Q

What is the most frequently ordered lab?

A

CBC

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2
Q

What are the things you would see on a CBC Results?

A 
WBC (Leukocyte) count 
RBC Count 
Hgb Count 
Hct Count 
Plt Count
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3
Q

What are the RBC indices on a CBC?

A

MCV
MCH
MCHC
RDW

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4
Q

This test is used to determine the presence of an infection or leukemia?

A

White Blood Cells w/Differential

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5
Q

Normal WBC ranges?

A

4.5-11.0 x10

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6
Q

Critical values for WBC w Diff

A

low <2,000

high 30,000

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7
Q

Neutrophils are also known as “_________________”

A

Poly, Segs, or PMN’s

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8
Q

What is the the measurement of the average volume (size) of RBC’s?

A

MCV

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9
Q

an increase in MCV is normally associated with what conditions?

A

Vitamin B 12 or folate deficiency

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10
Q

a decrease in MCV is associated with what conditions?

A

some abnormality in Hgb synthesis

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11
Q

normal range for MCV in a cell

A

76-96fl/cell

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12
Q

an increase in MCH is associated with what conditions?

A

Vitamin B12 or folate deficiency

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13
Q

what does a decrease in MCH usually seen with?

A

decrease seen in an iron deficiency

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14
Q

normal range of MCH?

A

27-32 pg/cell

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15
Q

How is the average concentration of hemoglobin in a given volume of packed red blood cells calculated? (MCHC)

A

MCHC= Hgb/Hct x 100

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16
Q

normal range for MCHC?

A

30-35 g/gl

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17
Q

What part of the CBC is proportionately low in patients with anemia?

A

Hgb

18
Q

Hgb ranges in adults?

A

Males 14-17.5 g/dl
Females 12.3-15.3 g/dl

Critical low: <8 g/dl

19
Q

Platelets below what value could run the risk of hemorrhage or spontaneous bleeding may occur and is considered a life threatening risk?

A

<20,000

20
Q

Platelets at what value could run the risk of thrombosis?

A

> 1,000,000

21
Q

Causes of leukopenia?

A 
bone marrow deficiency 
collagen vascular disease 
liver or spleen issues 
radiation therapy 
chemo therapy 
immune disease
22
Q

causes of leukocytosis

A 
anemia 
bone marrow tumor 
infectious disease 
bacterial infection 
inflammation 
inflammatory disease 
leukemia 
emotional stress
trauma 
intense exercise
23
Q

malignant appearing lymphocyte cells are usually secondary to which type of disease?

A

infectious mononucleosis

24
Q

an increase in eosinophils (eosinophilia) is typical in what type of infections?

A

parasitic infections and allergic disorders

25
Q

what are the term for the disease associated with elevated Hct? low Hct?

A

Anemia is below reference range

Polycythemia is above the reference range

26
Q

decrease in Hgb points to what? its seen in which conditions?

A

Hypochromasia. Is seen in iron deficiency anemia and thalassemia

27
Q

What are the QBC star CBC results?

A 
Hct
Hgb
MCHC
WBC
Gran 
% gran
Lymph/mono
% lymph/mono 
Platelets
28
Q

What are the two routine user controls on the QBC star?

A

STAR button

Door Release Hatch

29
Q

Which side of the QBC star is the power switch located on?

A

left side

30
Q

Three functions of the STAR button on the QBC star?

A

Start testing
Abort testing
Reprint Test Results

31
Q

if you need to reprint test results, what is the most important thing to remember?

A

hit reprint BEFORE OPENING THE DOOR.

32
Q

Where is the Setup Keyboard located and what is it used for?

A

front of the printer, beneath the panel, used to enter setup information into the computer such as date, time, and LCD contrast.

33
Q

The QBC star has an orange stain that colors which WBC? what are the associated color results?

A

Granulocytes appear orange
Lymphocytes appear green
Platelets appear yellow

34
Q

What is measured directly from the cell layers with QBC star?

A

hematocrit, white blood cells, and platelet count

35
Q

required materials for QBC star testing?

A

Whole blood (EDTA) preserved/purple top
collection tube
QBC star instrument
Printer paper

36
Q

How many times do you gently mix the blood sample before filling the QBC star tube?

A

12-15 times

37
Q

How many microliters are resulted in the QBC star tubes?

A

65-75 microliters

38
Q

how many times do we rock the QBC star tube?

A

4 times

39
Q

The QBC start tube must be inserted into the instrument within how many minutes of being prepared and capped?

A

15 min

40
Q

What is the periodicity of QC values being printed and performed?

A

every 8 hours and at startup

Lab (4 decks)

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