Phlebotomy Technician Practice Exam (NCPT/CPT)

In an effort to prevent what, is it important to wipe away the first drop of blood?

1. Infection

2. Contamination

3. Hemolysis

4. Coagulation

The correct answer is: Hemolysis

Wiping away the first drop of blood is important to prevent hemolysis, which is the rupturing or destruction of red blood cells. This can occur if the skin around the puncture site is touched or pressed too hard, contaminating the sample and affecting the accuracy of the results. Infection (option A) is usually caused by pathogens and can occur if proper sanitation measures are not taken. Contamination (option B) refers to the presence of unwanted substances or bacteria, which can alter the composition of the blood sample. Coagulation (option D) is the process of blood clotting, which can be affected by the pressure of wiping away the first drop of blood, leading to inaccurate results. Therefore, wiping away the first drop of blood is important to prevent hemolysis and ensure accurate test results.