Phlebotomy MCQ Quiz With Answers

Lavender topped collection tubes are used for hematology type of tests. Hematology is the study of blood and blood disorders. These tubes contain an anticoagulant called EDTA, which helps prevent blood from clotting. This type of tube is commonly used for complete blood count (CBC) tests, which measure different components of blood like red blood cells, white blood cells, and platelets. By using lavender topped tubes, the blood can be preserved in its liquid state and accurately analyzed for various hematological parameters.

Grey topped tubes are used for drawing blood samples for glucose testing. The color of the tube indicates the type of additive or anticoagulant present in the tube, which is necessary for accurate blood sugar testing.

Light blue-top tubes contain sodium citrate, which is an anticoagulant that prevents blood from clotting. This makes them suitable for collecting blood specimens for coagulation studies, such as the PT (prothrombin time) and INR (international normalized ratio) tests. These tests measure the time it takes for blood to clot and are used to assess a patient's blood clotting ability and monitor the effectiveness of anticoagulant therapy. The sodium citrate in the tube binds to calcium ions in the blood, preventing clot formation and preserving the blood sample for accurate coagulation testing.

Warming the antecubital space or hand prior to puncture increases blood flow. When the area is warmed, the blood vessels dilate, allowing more blood to flow through them. This increased blood flow can make it easier to find a suitable vein for puncture and can also improve the accuracy of blood tests by ensuring an adequate sample size.

Phlebotomy is the process of drawing blood from a patient for laboratory testing. This procedure takes place before any analysis or testing is done on the blood sample. Therefore, phlebotomy falls under the pre-analytical phase of the laboratory workflow, which involves all the steps taken before the actual testing of the sample begins.

Gray topped tubes contain a chemical that stops the action of insulin on glucose. This means that when blood is collected in a gray topped tube, the chemical present in the tube inhibits the activity of insulin, a hormone responsible for regulating blood sugar levels. As a result, the glucose in the blood is not metabolized properly, leading to higher blood sugar levels. This information is important for medical professionals to accurately assess a patient's blood glucose levels and diagnose any potential glucose-related disorders.

When a tourniquet is applied for longer than 3 minutes, it can cause stasis and ischemia in the limb, leading to changes in blood flow and analyte levels. Glucose levels may become falsely elevated due to increased glycolysis in the ischemic tissue. Potassium levels may also increase due to the release of potassium from damaged cells. Protein levels may become elevated due to increased vascular permeability and leakage of proteins into the blood. Therefore, all of the above analyte results are likely to become falsely elevated when a tourniquet is applied for longer than 3 minutes.

The tiger topped tube would be used to draw a BUN and Creatine. The color of the tube is not specified in the question, so it can be assumed that the tiger topped tube is the correct choice.

The correct order for drawing blood is tiger topped, lavender, gray. This is because tiger topped tubes are used for serum separation, lavender tubes are used for hematology tests, and gray tubes are used for glucose testing.

Phlebotomy refers to the process of making an incision or puncture in a blood vessel in order to collect blood samples or perform medical procedures. This involves cutting into a vessel, typically a vein, to access the bloodstream. Therefore, the given answer "Cut into vessel" accurately describes the meaning of phlebotomy.

The label of a tube of blood should include the patient's name and date of birth, as this is crucial for accurate identification. Additionally, the date and time of draw should be included to track the timeline of the blood sample. Including your initials is important for traceability and accountability. However, including the patient's residential address twice is unnecessary and could potentially violate privacy regulations.