Arterial Punctures and the Allen Test

The purpose of the Allen test is to:

• Determine collateral circulation in the hand

• Used for emergency venipunctures

• Evaluate cardiac function

• Test for nerve damage

The Allen test is used to assess the adequacy of which of the following?

• Radial and ulnar artery blood flow

• Venous return in the lower limb

• Lymphatic drainage in the arm

• Nerve function in the hand

What is the act of rotating a collection tube up and down called?

• Inversion

• Shaking

• Stirring

• Swirling

Why is it important to avoid shaking the tube or inverting too vigorously?

• To prevent contamination

• To ensure accurate results

• To avoid damaging the sample

• To maintain proper temperature

How many inversions are generally needed for most additives?

• Between 8-10 inversions for most additives.

• Only 1 inversion is needed for all additives.

• No inversions are needed for any additives.

• Between 3-5 inversions are always required.

The recommended order of draw for blood collection tubes is:

• Red, Blue, Green, Lavender, Gray

• Blue, Red, Green, Lavender, Gray

• Blue, Lavender, Red, Green, Gray

• Red, Green, Blue, Lavender, Gray

Which tube is used first in the recommended order of draw?

• Coagulation tube

• Blood culture tube

• Non-additive tube

• Additive tube

What does the plasma separator tube (PST) contain?

• Lithium heparin

• Sodium citrate

• EDTA

• Potassium oxalate

During a medical training session, Jasiyah and Avi are practicing venipuncture techniques. Which antecubital vein do they learn is considered the best vein for venipuncture?

• Medial cubital

• Basilic

• Cephalic

• Brachial

What is the primary difference between arteries and veins in terms of blood flow?

• Arteries carry blood towards the heart, while veins carry blood away from the heart

• Arteries carry oxygenated blood, while veins carry deoxygenated blood

• Arteries carry blood away from the heart, while veins carry blood towards the heart

• There is no significant difference in terms of blood flow