Other Routine Procedures
This is what HCT is measuring.
What is packed cell volume?
The total ruled area of a hemacytometer.
What is 9 mm2?
Basophilia in the cytoplasm of a RBC indicates this.
What is immaturity (presence of RNA)?
Put the six stages of myeloid cell maturation into the correct order.
What is:
Myeloblast>Promyelocyte>Myelocyte>Metamyelocyte>Band>SegThis RBC morphology is found in patients with abnormal lipid metabolism.
What is an acanthocyte?
Name the three stages involved in the ESR procedure (in order).
1) Rouleaux
2) Sedimentation
3) Slow packing of RBCs
A manual count was performed utilizing all 9 squares in the hemacytometer. The patient's sample was diluted 1:20. 175 WBCs were counted on Side 1 and 183 WBCs were counted on Side 2. What is the total WBC count?
What is 4.0 x 109/L?
This RBC morphology could be observed in a patient with DIC or an artifical heart valve.
What is schistocytes?
These cells originate from the lymphoid stem cell.
What are lymphocytes?
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Follow-up: What cells originate from the myeloid stem cell?
The term for a variation in sizes.
What is anisocytosis?
The most common cause for an increased HCT.
What is dehydration?
A patient's WBC count is 6.6 x 109/L. When performing the differential, the lab tech noted 6 NRBCs. What total WBC count should be reported?
What is 6.2 x 109/L?
This supravital stain is used to stain RBCs to count reticulocytes.
What is New Methylene Blue?
Plasma cells differentiate from this cell.
What are lymphocytes?
Specifically B-lymphs!
The most common reason to see an echinocyte.
What is a slow drying blood smear?
This is the single most important factor affecting the ESR result.
What is the plasma composition? Increased positively charged plasma proteins will decrease the zeta potential allowing rouleaux to form.
The patient has the following results:
WBC= 12.0 x 109/L
Neutrophils= 40%
What is the absolute neutrophil count (ANC)? What terminology could we use to describe these results?
ANC = 4.8 x 109/L
Leukocytosis & Relative neutropenia
This RBC inclusion is made up to denatured or precipitated Hgb.
What are Heinz bodies?
This is the precursor of a platelet.
What is a megakaroyte?
You noted spherocytes on the patient's blood smear. How would that affect their RBC indices?
MCV could be decresed, MCHC would be increased
This is a better test for inflammation than ESR and is performed in the clinical chemistry lab.
What is CRP?
A manual WBC count was performed using the four corner squares on the hemacytometer. 20 uL of the patient sample was diluted with 380 uL of diluent. The results of Side 1 was 99 and Side 2 was 103. What is the WBC count?
What is 5.1 x 109/L?
This stain is used to identify the presence of siderocytes.
What is Prussian Blue?
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Follow-up: What are siderocytes called if they are stained with Wright Stain?
Monocytes differentiate into this type of cell.
What are tissue macrophages?
These cells have what in common?
-Acanthocytes
-Target Cells
-Stomatocytes
They could all be seen in a patient with liver disease.