Hemoglobin Laboratory2

Cyanmethemoglobin is the colored product being directly measured in the method for hemoglobin determination.

• True

• False

TRUE about the QC in cyanmethemoglbin method (more than 1 answer required)

• standard should have an absorbance of 0

• Drabkin's reagent should be kept in polythene containers

• reagent should be prepared monthly

• reagent should be clear pale yellow with a pH of 7.0-7.4

A patient suffering from multiple myeloma had her blood drawn for Hb determination. Result turned out to be higher than normal. What is the BEST course of action?

• Report the result.

• Recollect sample.

• Repeat test.

• Ask patient to fast.

Cyanmethemoglobin determination was performed on a patient suffering from leukemia. What is the possible effect of the patient's condition on the result?

• falsely increase

• falsely decrease

• variable

• no effect

Failure to store the Drabkin's reagent properly would cause what erroneous result?

• falsely increased

• falsely decreased

• variable

• no effect

TRUE about cyanmethemoglobin method (more than 1 answer required)

• involves production of a colored compound

• involves reduction reaction

• involves oxidation reaction

• measures active hemoglobins only

Method that involves titration using TiCl₃

• Visual colorimetric

• Photoelectric colorimetric

• Chemical

• Gravimetric

• Gasometric

In the gravimetric method of Hb determination, the drop of blood remained in suspension after 5 seconds. What is the BEST course of action?

• Report as normal.

• Report as increased.

• Report as decreased.

• Repeat the test.

• Recollect sample.

FALSE about the gravimetric method of Hb determination (more than 1 answer required)

• recommended for routine procedures

• quantitative test for Hb

• drop of blood that floats indicates normal Hb level

• drop of blood that sinks indicates abnormal Hb level

TRUE about cyanmethemoglobin method (more than 1 answer required)

• incorporated in automated machines

• best method for Hb determination

• useful for mass screening

• measures all forms of Hb