Phlebotomy Equipment

A nurse needs to administer a medication with the least amount of pain to a patient. Which needle should they choose based on the smallest bore (diameter)?

• 23-gauge needle

• 20-gauge needle

• 21-gauge needle

• 16-gauge needle

A medical professional needs to draw blood from a patient using an evacuated system. Which needle gauges are commonly used for this purpose in the field of Medicine?

• 24, 25, or 26 gauge

• 16, 17, or 18 gauge

• 20, 21, or 22 gauge

• 10, 12, or 14 gauge

In a medical emergency, which size needle would allow blood to flow the fastest during a transfusion?

• 21

• 23

• 20

• 22

In a hospital, the unit used to measure the volume of liquid medication in the metric system is the:

• millimeter

• meter

• centimeter

• gram

• liter

A nurse is preparing to administer an injection to a patient. In terms of needle selection, the larger the gauge number, the:

• longer the needle

• smaller the diameter of the bore

• larger the diameter of the bore

• shorter the needle

In a medical setting, a syringe is commonly used when drawing blood samples from patients, EXCEPT for:

• requests for multiple testing, requiring different anticoagulants and multiple tubes

• persons with fragile vein walls

• persons with rolly veins

• arterial blood gases

A patient is undergoing a blood test. Which anticoagulant used by the lab technician prevents coagulation of blood by removing calcium through the formation of insoluble calcium salt?

• EDTA

• oxalate

• citrate

• lithium heparin

• A, B, and C

You are a doctor in a busy hospital and need to draw blood for multiple tests from several patients. The best and most cost-efficient technique would be:

• butterfly system

• syringe

• lancet

• evacuated tube system

A patient is undergoing a medical procedure where blood gases and other chemistry tests are required. The medical team decides to use the anticoagulant heparin. This is because heparin works by:

• preventing the conversion of plasminogen to plasmin

• binding calcium ions

• activating tissue thromboplastin

• preventing the conversion of prothrombin to thrombin

A nurse is preparing to draw blood samples for various tests. All of the following statements are true EXCEPT:

• Lavender-stoppered tubes are used for CBC, WBC, and platelet testing.

• Gray-stoppered tubes are used for blood glucose tests.

• Red-stoppered tubes are used for many tests, including serum enzyme testing.

• Gray-stoppered tubes are used for CBC and WBC tests.