« previous next »

Author Question: A patient's white blood count comes off an automated cell counter as 380 109/L. Which of the ... (Read 88 times)

Caiter2013

  • Hero Member
  • *****
  • Posts: 607
on: Jun 25, 2018
A patient's white blood count comes off an automated cell counter as 380  109/L. Which of the following could be reported without any additional testing?
 
  a. Red blood count
  b. Hemoglobin
  c. Hematocrit
  d. Platelet count

Question 2

When the electronic impedance principle is used to count blood cells, what is done to increase platelet-counting sensitivity?
 
  a. Decrease the size of the RBC/platelet aperture.
  b. Increase the size of the RBC/platelet aperture.
  c. Use a strong lysing agent to selectively lyse the RBCs.
  d. Lower the upper threshold for counting platelets so that even microcytic red cells are excluded.


bubulittle310@msn.cn

  • Sr. Member
  • ****
  • Posts: 281
Reply #1 on: Jun 25, 2018
Answer to Question 1

ANS: D
The platelet count could be reported, but none of the other results are reportable. White cells are always counted with red cells; however, there normally are so few of them in comparison to the number of red cells that their presence does not significantly affect the red count. When the white count is markedly elevated, it significantly affects the red count and MCV and thus the hematocrit. The hemoglobin is also invalid because the high number of white cells adds turbidity to the hemoglobin measurement, thus falsely increasing the hemoglobin determination (and then also the MCH and MCHC). The markedly elevated white cell count necessitates at least a blood film review, if not a manual white cell differential (varies with the instrument limitations).

Answer to Question 2

ANS: A
To improve the sensitivity when counting platelets, the size of the RBC/platelet aperture is decreased.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

For high blood pressure (hypertension), a new class of drug, called a vasopeptidase blocker (inhibitor), has been developed. It decreases blood pressure by simultaneously dilating the peripheral arteries and increasing the body's loss of salt.

Did you know?

Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.

Did you know?

If you could remove all of your skin, it would weigh up to 5 pounds.

Did you know?

As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

Did you know?

Patients should never assume they are being given the appropriate drugs. They should make sure they know which drugs are being prescribed, and always double-check that the drugs received match the prescription.

Pneumonia patient’s chest x-ray. Note the irregular areas of density. Pneumonia patient’s chest x-ray. Note the irregular areas of density.
Patient Physical Status Classification Patient Physical Status Classification
Sign and symptoms of a patient with heart failure Sign and symptoms of a patient with heart failure
Stem Cell Production Stem Cell Production
Blood Flow Through Capillaries Blood Flow Through Capillaries
Structural comparison of human blood vessels and the direction of blood flow through them Structural comparison of human blood vessels and the direction of blood flow through them
Video: Audiology

For a complete list of videos, visit our video library