HEMATOLOGY - LEMAR - POST TESTS (6) +
PROGRESS EXAMS. 2024.
Compare the volume of plasma to serum obtained from a given volume of whole blood:
Plasma greater volume than serum
Plasma lesser volume than serum
Same volume
Variable
Plasma greater volume than serum
EDTA is used in concentrations of ___ mg/1 mL of whole blood.
0.5 mg/1 mL of whole blood
1.5 mg/1 mL of whole blood
2.0 mg/1 mL of whole blood
2.5 mg/1 mL of whole blood
1.5 mg/1 mL of whole blood
EDTA is used in concentrations of 1.5 mg/1 mL of whole blood.
A 7.0 mL EDTA tube is received in the laboratory containing only 2.0 mL of blood. If the laboratory is
using manual techniques, which of the following tests will most likely be erroneous?
RBC count
Hemoglobin
Hematocrit
,WBC count
Hematocrit
EDTA-induced pseudothrombocytopenia can be identified on blood smear by:
Finding platelets pushed to the feathered end
Finding platelets adhering to WBCs
Finding no platelets at all on the smear
discoloration to the macroscopic appearance of the slide
Finding platelets adhering to WBCs
Platelet satellitosis (platelet encircling the peripheral borders of neutrophils) is seen in a rare patient
whose blood is anticoagulated with EDTA. This phenomenon is thought to be due to a serum factor
which reacts in the presence of EDTA.
Platelet satellitosis (platelet encircling the peripheral borders of neutrophils) is seen in a rare patient
whose blood is anticoagulated with EDTA. This phenomenon is thought to be due to a serum factor
which reacts in the presence of EDTA.
Report the automated platelet count since it is more accurate than a platelet estimate
Warm the EDTA tube and repeat the automated platelet count
Rerun the original specimen since the platelet count and blood smear estimate do not match
Recollect a specimen for a platelet count using a different anticoagulant
Recollect a specimen for a platelet count using a different anticoagulant
,Sodium citrate in the concentration of ___ solution has been adopted as the appropriate
concentration for coagulation studies.
1.5%
2.8%
3.2%
3.8%
3.2%
Sodium citrate in the concentration of a 3.2% solution has been adopted as the appropriate
concentration by the ICSH and the International Society for Thrombosis and Hemostasis for coagulation
studies.
Which ratio of anticoagulant to blood is correct for coagulation procedures?
1:4
1:5
1:9
1:10
1:9
Which results would be expected for the PT and APTT in a patient with polycythemia?
Both prolonged
Both shortened
, Normal PT, prolonged APTT
Both normal
Both prolonged
What is the proper angle of needle insertion for phlebotomy?
5 degrees
15 degrees
35 degrees
45 degrees
15 degrees
Select the needle most commonly used in standard venipuncture in an adult:
One inch, 18 gauge
One inch, 21 gauge
One-half inch, 21 gauge
One-half inch, 25 gauge
One inch, 21 gauge
The advantage of using a 1-inch needle is that it provides better control during venipuncture.
The bevel of the needle should be held _____ in the performance of a venipuncture.
Sideways
PROGRESS EXAMS. 2024.
Compare the volume of plasma to serum obtained from a given volume of whole blood:
Plasma greater volume than serum
Plasma lesser volume than serum
Same volume
Variable
Plasma greater volume than serum
EDTA is used in concentrations of ___ mg/1 mL of whole blood.
0.5 mg/1 mL of whole blood
1.5 mg/1 mL of whole blood
2.0 mg/1 mL of whole blood
2.5 mg/1 mL of whole blood
1.5 mg/1 mL of whole blood
EDTA is used in concentrations of 1.5 mg/1 mL of whole blood.
A 7.0 mL EDTA tube is received in the laboratory containing only 2.0 mL of blood. If the laboratory is
using manual techniques, which of the following tests will most likely be erroneous?
RBC count
Hemoglobin
Hematocrit
,WBC count
Hematocrit
EDTA-induced pseudothrombocytopenia can be identified on blood smear by:
Finding platelets pushed to the feathered end
Finding platelets adhering to WBCs
Finding no platelets at all on the smear
discoloration to the macroscopic appearance of the slide
Finding platelets adhering to WBCs
Platelet satellitosis (platelet encircling the peripheral borders of neutrophils) is seen in a rare patient
whose blood is anticoagulated with EDTA. This phenomenon is thought to be due to a serum factor
which reacts in the presence of EDTA.
Platelet satellitosis (platelet encircling the peripheral borders of neutrophils) is seen in a rare patient
whose blood is anticoagulated with EDTA. This phenomenon is thought to be due to a serum factor
which reacts in the presence of EDTA.
Report the automated platelet count since it is more accurate than a platelet estimate
Warm the EDTA tube and repeat the automated platelet count
Rerun the original specimen since the platelet count and blood smear estimate do not match
Recollect a specimen for a platelet count using a different anticoagulant
Recollect a specimen for a platelet count using a different anticoagulant
,Sodium citrate in the concentration of ___ solution has been adopted as the appropriate
concentration for coagulation studies.
1.5%
2.8%
3.2%
3.8%
3.2%
Sodium citrate in the concentration of a 3.2% solution has been adopted as the appropriate
concentration by the ICSH and the International Society for Thrombosis and Hemostasis for coagulation
studies.
Which ratio of anticoagulant to blood is correct for coagulation procedures?
1:4
1:5
1:9
1:10
1:9
Which results would be expected for the PT and APTT in a patient with polycythemia?
Both prolonged
Both shortened
, Normal PT, prolonged APTT
Both normal
Both prolonged
What is the proper angle of needle insertion for phlebotomy?
5 degrees
15 degrees
35 degrees
45 degrees
15 degrees
Select the needle most commonly used in standard venipuncture in an adult:
One inch, 18 gauge
One inch, 21 gauge
One-half inch, 21 gauge
One-half inch, 25 gauge
One inch, 21 gauge
The advantage of using a 1-inch needle is that it provides better control during venipuncture.
The bevel of the needle should be held _____ in the performance of a venipuncture.
Sideways
