A tourniquet is used in venipuncture to:

• concentrate the blood specimen

• find and enter veins more easily

• keep the vein from collapsing

• all of the above

What causes evacuated tubes to fill with blood automatically?

• Arterial blood pressure

• Fist pumping by the patient

• Premeasured tube vacuum

• Pressure from the tourniquet

Which additive prevents glycolysis?

• EDTA

• Sodium fluoride

• Potassium oxalate

• Heparin

Lavender-top tubes are most commonly used to collect:

• chemistry tests

• coagulation specimens

• hematology tests

• immunology tests

Of the following tubes or containers, which is filled last in the recommended order of draw?

• Blood culture bottle

• Lavender top

• Light-blue top

• Red top

Tiny red spots that appear on a patient’s arm when the tourniquet is applied are a sign that the:

• patient is allergic to latex

• patient is anemic

• site may bleed excessively

• tourniquet is too tight

When the arm of the patient is swollen with excess fluids, the condition is called:

• edema

• hemoconcentration

• icterus

• syncope

Tags

NGSS.HS-LS1-3

Which of the following situations can result in hemoconcentration?

• Drawing a large tube with a small needle

• Mixing the specimen too vigorously

• Leaving the tourniquet on over 1 minute

• Partially filling a normal-draw tube

Which of the following parts of the syringe system refers to the “wings” that jut out from the side of the barrel that provide an area or surface for the index and middle finger to grasp during aspiration and administration?

• Flange

• Plunger

• Thumb press

• Plunger Rod

Which of the following needles has the largest bore diameter?

• 18 gauge

• 21 gauge

• 20 gauge

• 23 gauge