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During the process of drawing blood from a patient for analysis of blood corpuscles and plasma, you are provided with four types of test tubes. Select the test tube that should NOT be used for this purpose.
A test tube containing calcium bicarbonate.
A chilled test tube.
A test tube containing heparin.
A test tube containing sodium hydroxide
Answers (1)
Option 3, a test tube containing heparin, should not be used for storing the blood sample during the analysis of blood corpuscles and plasma. Heparin is an anticoagulant that prevents blood clotting, which can interfere with the analysis of blood components. Therefore, using a test tube containing heparin may affect the accuracy of the test results. It is important to use appropriate test tubes that do not contain substances that can alter the properties of the blood sample being analyzed.
Hence, the correct answer is option 3.
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