Phlebotomy Quiz & Flashcards

Phlebotomy is primarily performed to collect blood samples for testing.

EDTA is used in lavender-top tubes to prevent blood clotting.

The needle should be inserted at a 15-30 degree angle for optimal blood flow.

Extended tourniquet application can lead to hemoconcentration, affecting test accuracy.

The median cubital vein is preferred due to its size and location.

Inverting the tubes ensures additives are properly mixed with the blood.

A hematoma is a localized collection of blood outside the blood vessels.

The needle should be removed immediately to prevent injury.

Proper labeling prevents misidentification and errors in testing.

A larger bore needle allows for faster blood flow but may increase discomfort.

A too-large needle may damage the vein, leading to collapse.

The order of draw prevents additives in one tube from affecting others.

Bevel facing up reduces tissue damage and makes insertion smoother.

Lancets are used for capillary blood sampling, such as fingersticks.

Capillary samples are often used for glucose monitoring due to ease and speed.

Butterfly needles are used for small or fragile veins due to their design.

Gloves must be changed between patients to prevent cross-infection.

Failing to mix additives properly can result in clotting within the tube.

Drawing from a mastectomy side can lead to lymphedema.

Hemolysis is the rupture of red blood cells, which can alter test results.

Improper needle removal can cause blood to leak into tissues, forming a hematoma.

Palpating helps determine the best vein for venipuncture by assessing size and depth.

Correct volume ensures the right blood-to-additive ratio for accurate results.

Successful venipuncture is indicated by a steady flow of blood and minimal discomfort.

Needles should be disposed of in a sharps container to prevent injury and infection.

Drawing blood from a standing patient increases the risk of fainting, which could lead to injury.

Excessive pressure can cause small ruptures in capillaries, leading to petechiae.

A transfer device allows for safe movement of blood from a syringe to a collection tube.

Checking for allergies prevents adverse reactions to latex or antiseptics used.

Needlestick injuries should be reported and managed according to protocol to prevent infection.

A tourniquet slows blood flow to make veins more visible and easier to access.

A warm compress dilates veins, making them easier to locate.

Patient autonomy should be respected; document and inform healthcare providers of the refusal.

Using a new needle prevents the transmission of infections between patients.

If a vein is missed, the needle should be withdrawn and a new site chosen.

Dehydration causes veins to shrink and become less visible and accessible.

Timely transport preserves sample stability and accuracy of test results.

The bevel allows for a smoother, less painful entry into the skin.

Prolonged application can alter blood concentration, affecting test results.

Phlebotomy chairs are designed to safely support patients, especially if they feel faint.

Clear communication helps ease patient anxiety by making the process transparent.

Repositioning the needle may improve blood flow without causing harm.

Excessive pressure from the tourniquet can rupture small capillaries, causing petechiae.

Hand hygiene prevents the transmission of pathogens between patients.

Vigorous shaking can rupture red blood cells, leading to hemolysis.

Arteries pulsate and are deeper, while veins are less pulsatile and closer to the surface.