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Author Question: All of the following will be invalid when lipemia is present in a blood sample except: a. MCHC ... (Read 17 times)

haleyc112

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on: Jun 25, 2018
All of the following will be invalid when lipemia is present in a blood sample except:
 
  a. MCHC
  b. MCV
  c. MCH
  d. Hemoglobin

Question 2

Select the most appropriate action for the results in Question 18:
 
  a. Report the results.
  b. Lyse the red cells manually and rerun.
  c. Warm sample to 37 C and rerun.
  d. Replace plasma with saline and rerun.


tuwy

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Reply #1 on: Jun 25, 2018
Answer to Question 1

ANS: B
When a blood sample is lipemic, the hemoglobin is falsely elevated. The MCH and MCHC are also falsely elevated because they use the hemoglobin measurement for their calculation. The MCV is valid because it does not depend on the hemoglobin measurement.

Answer to Question 2

ANS: C
The blood sample should be warmed to 37 C and rerun when a cold agglutinin is present or suspected of being present. The antibody will disassociate from the red cell membrane at this temperature, and the red cells will unclump. This raises the red count and lowers the MCV, MCH, and MCHC.


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