Free MLPAO Laboratory Techniques and Procedures Questions and Answers

Question 1

Which of the following is a transfusion science test?

Accepted Answer

DAT

Answer

The Direct Antiglobulin Test (DAT) is a crucial test in transfusion science, used to detect antibodies or complement components bound to red blood cells in vivo. It is vital for diagnosing conditions such as hemolytic disease of the newborn, autoimmune hemolytic anemia, and transfusion reactions. The other options listed are typically associated with chemistry or hematology, not directly transfusion science.

Question 2

Which of the following items is NOT found in cryoprecipitate?

Accepted Answer

Factor V

Answer

Cryoprecipitate is a concentrated plasma derivative rich in specific clotting factors that precipitate out when fresh frozen plasma is thawed at cold temperatures. It primarily contains Factor I (fibrinogen), Factor VIII, Factor XIII, and von Willebrand factor. Factor V, however, remains in the cryoprecipitate-poor plasma and is therefore not found in significant amounts in cryoprecipitate.

Question 3

A fecal sample for culture and sensitivity is collected:

Accepted Answer

by aseptic technique.

Answer

A fecal sample for culture and sensitivity must be collected using aseptic technique. This involves employing procedures to prevent contamination of the sample from external sources, ensuring that only the microorganisms present in the stool are cultured. While stool is not sterile, aseptic collection minimizes the introduction of environmental contaminants that could interfere with accurate diagnostic results.

Question 4

What is the function of the gel separator in an evacuated blood collection tube?

Accepted Answer

RBCS and WBCS from plasma and serum

Answer

The gel separator in an evacuated blood collection tube forms a stable physical barrier between the cellular components (red blood cells and white blood cells) and the liquid portion (plasma or serum) after centrifugation. This separation prevents metabolic activity of the cells from altering analyte concentrations in the plasma or serum. It ensures sample integrity and allows for accurate testing of various analytes.

Question 5

The laboratory rejects a specimen for INR testing because the specimen is in an evacuated tube with a light blue top and the specimen is:

Accepted Answer

delayed in transit for 6 hours.

Answer

A specimen for INR testing, collected in a light blue top tube with sodium citrate, is typically rejected if there's a significant delay in transit, such as 6 hours. Coagulation factors are labile and can degrade over time, leading to inaccurate results if not processed or tested within recommended timeframes. Prolonged delays compromise the integrity of the coagulation factors, making the test unreliable.

MLPAO - Medical Laboratory Professionals Association of Ontario Practice Test

MLPAO - Medical Laboratory Professionals Association of Ontario Practice Test

Free MLPAO Laboratory Techniques and Procedures Questions and Answers