Lab Exam (From review sheet)

Question 1

What is a hematology assay used for?

Answer 1

Assays are used to diagnose blood disorders such as anemias and other general diseases

Question 2

CDCs: when and why

Answer 2

CBCs are performed when a patient feels symptoms such as weakness, fatigue, fever, bleeding, etc. The purpose is to see what specifically is wrong with the patient

Question 3

CBC: components

Answer 3

a. RBC
b. WBC
c. Platelet
d. MCV
e. MCH
f. MCHC
g. PTT
h. aPTT

Question 4

Reticulocyte units

Answer 4

Normally in %, but also in cells per liter for ARC

Question 5

Sedimentation rate: what does it measure

Answer 5

Used to see if any disease affects the plasma proteins

Question 6

Sedimentation rate: units

Answer 6

Millimeters

Question 7

Sedimentation rate: factors that affect it

Answer 7

gender, habits like diet and drug use

Question 8

Sedimentation rate: Prefered method

Answer 8

Westergren method

Question 9

Sedimentation rate: Men Value

Answer 9

Male: 0-15mm

Question 10

RBC Indices: MCV range

Answer 10

MCV: 80 to 100 femtoliter

Question 11

Most important concern when performing a phlebotomy?

Answer 11

The main concern when taking a person’s blood sample is performing diplomacy and ethical behavior

Question 12

Where do you place tourniquet

Answer 12

The tourniquet should be placed below IV site on the bicep and should be on for no longer than a minute

Question 13

The order of the draw

Answer 13

Coagulation test (Light Blue top), Chemistry test (Red top), CBC test (Lavender top)

Question 14

Tube types: what they’re for

Answer 14

Blue top: Coagulation
Red Top: Chemistry
Lavender: CBC

Question 15

Tube types: what they’re for

Answer 15

Blue top: Coagulation
Red Top: Chemistry
Lavender: Hematology
Yellow: Microbiology

Question 16

Common veins for phlebotomy

Answer 16

Median cubital vein

Question 17

Where to draw/not draw blood sample

Answer 17

Draw blood on opposite arm above the IV site, don’t puncture at IV site

Question 18

When to remove tourniquet

Answer 18

Remove the tourniquet one last tube starts filling

Question 19

How to handle needle

Answer 19

Secure with 3 fingers angled at 15 degree angle entering 3/4s of the needle in the skin

Question 20

Criteria for rejection of blood sample

Answer 20

a. Incorrect specimen collection container.
b. insufficient specimen quantity.
c. Transported incorrectly.
d. Inadequate fixative.
e. specimen too large for container.
f. Incorrect media.
g. Specimen stability compromised

Question 21

Hematocrit

Answer 21

volume occupied by RBCs in a given in a volume of blood, expressed in percentage of the whole blood sample

Question 22

Hemoglobin

Answer 22

the component of the RBC that transports O2 from lungs to tissues and CO2 from tissues to lungs

Question 23

Hematocrit calculation

Answer 23

RBC * MVC / 10 = HCT

Question 24

hematocrit value: infant

Answer 24

Newborn: 53-65 %

Question 25

hematocrit value: Child

Answer 25

Infant: 30-43 %

Question 26

hematocrit value: Women

Answer 26

37-47%

Question 27

hematocrit value: Men

Answer 27

42-52%

Question 28

What is the rule of 3?

Answer 28

Hematocrit = 3*hemoglobin Hemoglobin= 3 * RBC

Question 29

Hemoglobin types

Answer 29

Oxyhemoglobin: with O2 Carbaminohemoglobin: with CO2 Methemoglobin: with ferric Iron Carboxyhemoglobin: with CO Sulfhemoglobin: with S

Question 30

Which types of hemoglobin doesn't carry O2

Answer 30

Methemoglobin: with ferric Iron Carboxyhemoglobin: with CO Sulfhemoglobin: with S

Question 31

Hemoglobin affinity

Answer 31

250x stronger for carbon monoxide than O2

Question 32

Hemoglobin value: infant

Answer 32

13.5-19.5

Question 33

Hemoglobin value: Child

Answer 33

11.5-15.5

Question 34

Hemoglobin value: Women

Answer 34

12-15

Question 35

Hemoglobin value: Men

Answer 35

13.5-18

Question 36

MCV calculation

Answer 36

MCV: HCT/RBC *10

Question 37

MCH calulation

Answer 37

MCH: Hgb/RBC * 10

Question 38

MCHC calculation

Answer 38

MCHC: Hgb/HCT *100

Question 39

What does stain for Reticulocytes

Answer 39

Stains the RNA and ribosomes that are still present in reticulocytes

Question 40

Reticulocyte calculation

Answer 40

of reticulocytes counted/1000*100

Question 41

Sedimentation rate: Women Value

Answer 41

Female: 0-24mm

Question 42

Sedimentation rate: Child Value

Answer 42

Child: 0-24mm

Question 43

RBC Indices: MCH range

Answer 43

MCH: 27 to 31 picograms/cell

Question 44

RBC Indices: MCHC range

Answer 44

MCHC: 32 to 36 grams/deciliter