ASCP Specimen Collection

Question 1

Which test is carried out prior to a patient giving blood?

Accepted Answer

hemoglobin

Answer

A hemoglobin test is routinely performed prior to blood donation to ensure the donor has sufficient red blood cell levels. This prevents the donor from experiencing adverse effects like anemia after donating blood. It also ensures the donated blood is suitable for transfusion, as low hemoglobin would indicate insufficient oxygen-carrying capacity.

Question 2

What proportion of red blood cells, white blood cells, and platelets make up the total volume of blood?

Accepted Answer

45%

Answer

Hemolysis refers to the breakdown or rupture of red blood cells (erythrocytes), which releases hemoglobin into the surrounding plasma or serum. This can occur due to improper blood collection techniques, vigorous shaking of the sample, or certain medical conditions. Hemolysis can interfere with laboratory test results, making the sample unsuitable for analysis.

Question 3

Which color tubes have coagulants in them?

Accepted Answer

gold, red, orange

Answer

Dark blue top tubes are specifically designed for trace metal analysis. These tubes are manufactured with very low levels of trace element contamination in their stoppers and glass. This stringent manufacturing process ensures accurate results for sensitive tests like lead, zinc, or copper levels, preventing external contamination from affecting the sample.

Question 4

Hemolysis: What is it?

Accepted Answer

the breakdown of erythrocytes

Answer

Platelets, also known as thrombocytes, are small, anucleated cell fragments that are crucial for blood clotting (hemostasis). When a blood vessel is injured, platelets aggregate at the site of injury to form a plug, initiating the coagulation cascade and preventing excessive blood loss. They are essential for wound healing and maintaining vascular integrity.

Question 5

When performing trace metal analysis, which color tube would you use?

Accepted Answer

dark blue

Answer

The cephalic vein is frequently utilized for venipuncture in obese patients because it tends to be more superficial and palpable on the outer aspect of the arm. In contrast, the median cubital and basilic veins can be deeper and more challenging to locate due to increased adipose tissue. Its accessibility makes it a reliable choice in these situations.

ASCP Phlebotomy Technician Exam Practice Test

ASCP Phlebotomy Technician Exam Practice Test

ASCP Specimen Collection