PCV Lab 4 Quiz

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Questions and Answers

What is the normal range of hematocrit for adult males?

37-47%
18-25%
42-52% (correct)
36-44%

Which of the following conditions is associated with an increase in PCV?

Pregnancy
Lung disease (correct)
Anemia
Kidney disease

What is the purpose of centrifuging the capillary tube containing the blood sample?

To separate the red blood cells from the plasma (correct)
To sterilize the blood sample
To measure the volume of the blood sample
To mix the blood sample thoroughly

What is the role of a hematocrit reader in the PCV test?

To determine the percentage of red blood cells in the sample (B) Signup and view all the answers

What is the main purpose of the PCV test?

To diagnose anemia and polycythemia (D) Signup and view all the answers

A patient presents with a PCV of 25%. Which of the following conditions is most likely to be present?

Anemia (A) Signup and view all the answers

A patient with a history of kidney disease may have a low PCV due to:

Decreased red blood cell production (A) Signup and view all the answers

Which of the following is NOT a reason for an increased PCV?

Low in minerals like iron (D) Signup and view all the answers

What is the significance of the hematocrit reader in the PCV test?

It measures the percentage of red blood cells in the whole blood sample (D) Signup and view all the answers

If a patient has a PCV of 30%, what is the most likely cause of this?

Anemia (D) Signup and view all the answers

Which of the following conditions would most likely result in a decrease in PCV?

Kidney disease (D) Signup and view all the answers

A patient presents with a PCV of 55%. Which of the following is the most likely cause?

Polycythemia (C) Signup and view all the answers

Which of the following is NOT a step involved in the PCV test procedure?

Analyzing the blood sample under a microscope (A) Signup and view all the answers

What is the purpose of centrifuging the capillary tube during the PCV test?

To separate the red blood cells from the plasma (C) Signup and view all the answers

A patient's PCV is measured at 35%. This result likely indicates that the patient is:

Healthy (C) Signup and view all the answers

A patient with iron deficiency anemia is likely to have a(n) _____.

Decreased PCV (D) Signup and view all the answers

Which of the following conditions does NOT typically result in an increased PCV?

Pregnancy (D) Signup and view all the answers

Which of these is a valid reason for using a sterile lancet when collecting a blood sample for PCV?

To prevent contamination of the blood sample (A) Signup and view all the answers

In the context of the PCV test, what is the primary purpose of centrifuging the blood sample?

To separate the red blood cells from the plasma (D) Signup and view all the answers

Why is it important to fill the hematocrit tube to ¾ its length before centrifuging?

To provide enough blood sample for accurate reading (D) Signup and view all the answers

A doctor suspects a patient has polycythemia. Which of the following steps would be LEAST useful in confirming their diagnosis?

Checking the patient's blood pressure (A) Signup and view all the answers

A patient presents with a PCV of 20%. Which of the following could be a likely explanation for this result?

Iron deficiency anemia (B) Signup and view all the answers

A doctor suspects a patient has polycythemia. What is the expected PCV value for this patient?

Higher than 52% (D) Signup and view all the answers

Which of the following scenarios would NOT lead to an increased PCV?

A patient with iron deficiency anemia (D) Signup and view all the answers

Why is it crucial to clean the finger with spirit before obtaining a blood sample for the PCV test?

To minimize the risk of infection (C) Signup and view all the answers

What is the PRIMARY purpose of centrifuging the blood sample in a capillary tube during the PCV test?

To separate the red blood cells from the plasma (C) Signup and view all the answers

A patient's PCV value is found to be within the normal range. This indicates that the patient most likely has:

Normal red blood cell count (C) Signup and view all the answers

Which of the following conditions is LEAST likely to contribute to an increased PCV?

Iron deficiency anemia (A) Signup and view all the answers

Flashcards

Packed Cell Volume (PCV)

A measure of the relative percentage of red blood cells in whole blood.

Purpose of PCV Testing

Used to diagnose anemia and polycythemia in patients.