1. Which period of laboratory process is the major source of analytical errors?
preanalytical
analytical
postanalytical
pre-preanalytical
post-postanalytical
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2. Which anatomical region is the most preferred site for venous blood sampling?
dorsal hand veins
head veins
antecubital fossa veins
dorsal foot veins
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3. Number the following tubes in order of collecting the blood samples (…) Hemogram (purple cap)
(…) Heparinized (green cap)
(…) Blood culture
(…) Serum tubes (red, yellow and orange cap)
(…) Citrated tubes (blue and black cap)
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4. What should be the right angle between the arm and the needle during blood sampling?
90 degrees
15–30 degrees
parallel to the veins
120 degrees
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5. Which of the following is true?
Only the tubes with anticoagulant should be inverted after blood sampling
Only the serum tubes should be inverted after blood sampling
All tubes should be inverted after blood sampling
Tubes should not be inverted after blood sampling
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6. What is compromised with the rejection of samples by the laboratory?
Employee safety
Patient safety
Laboratory safety
Institution safety
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7. When is the correct time for blood gas analysis following blood collection?
Within 5 minutes
Within 15 minutes
Within 30 minutes
Within 45 minutes
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8. What is hemolysis?
The destruction or dissolution of platelets with release of cell content
The destruction or dissolution of macrophages with release of cell content
The destruction or dissolution of monocytes with release of cell content
The destruction or dissolution of erythrocytes with release of cell content
The destruction or dissolution of neutrophils with release of cell content
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9. What do we call a value that represents a pathophysiological state at such variance with normal (reference values) as to be life-threatening unless something is done promptly and for which some corrective action must be taken?
critical (panic) value
high value
abnormal value
normal value
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10. When is the laboratory in charge of the samples?
After the test requests are made.
After the sample collection is completed
After the sample is accepted.
When the samples are analyzed
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11. Which region is suitable for collecting blood samples?
hematoma region
presence of scar tissue on the region
proximally of the IV catheters
distally of the IV catheters
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