MEDCA exam study guide Phlebotomy

When blood is removed from the body, the blood clots and the liquid part is called

Serum

If veins in the arms cannot be used for venipuncture, the alternative veins can be found in the

Dorsal side of hands and wrists

The instrument used to speed the removal of serum by spinning the blood is called a

Centrifuge

Before performing a venipuncture, a clean pair of gloves should be put on the presence of the patient because it is a reassuring

Safety concious gesture for both the worker and the patient.

Lying face up on their back is called what position?

Supine position

To avoid blood-clotting in the collection tube, it is extremely important the blood in the..

Purple-topped tube be gently inverted a minimum of eight times.

What is the normal ph range of a normal body?

7.35 to 7.45

Serum should be transported to the laboratory for testing and separated from blood cells within what time limit?

Within 2 hours

Of the total volume of blood, how much percent is liquid

55% is liquid

A person who has too little hemoglobin or a decreased number of red blood cells is known to be

Anemic

Where do blood cells begin their formation?

In the lymph nodes and bone marrow.

If the phlebotomist collects blood in the neonatalogy department, how old is the patient?

Hours to a few days old.

The iron containing pigment of the red blood cells is called

Hemoglobin

How long do mature red blood cells live once they have entered the blood stream?

Approximately 120 days

Approximately how many liters of blood does the body contain?

Approximately 5 liters of blood

The study of the nature and cause of disease is called

Pathology

A specifically labeled puncture-resistant container for the disposal of needles, scalpels and syringes is known as the. .

Sharps container

When drawing blood, which vein is most preferred?

The median cubital

If blood pressure is read 120/80, which is the systolic pressure?

120

What is systolic pressure?

The pressure when the heart is contracted.

A chemical substance that prevents the heart from clogging is called an...

Anticoagulant

Steady-state condition is referred to as

Homeostasis

What cannot be converted into bar code symbols?

Handwritten information

What is interstitial fluid?

Tissue fluid

Fragile veins are most likely to be found in what kind of patient?

Geriatric patients

After a finger stick is performed what should the phlebotomist do first.

Wipe away the first drop of blood with a gauze.

What is the best angle for spreading a blood smear using two slides?

A 30 degree angle.

What are skin puncture samples often used for?

White blood cell differentials.

During a skin puncture procedure, the cut should be across the

Fingerprint lines.

In most cases, when should blood be drawn to determine medication levels?

Prior to the next dose of medication given.

In relation to veins, what does the term occluded mean?

Obstructed.

The thumb has a..

Pulse

What is the last step in any phlebotomy procedure, including skin puncture?

Checking that the bleeding has stopped and thanking the patient for cooperating.

What is the best way to decontaminate a phlebotomists hands if they are visibly dirty with dust and dirt?

Wash them with soap and water.

How long should the alcohol be allowed to dry before venipuncture?

30 to 60 seconds

During a venipuncture what is the best angle for inserting the needle into the skin?

15 to 30 degrees

During a venipuncture, when does the phlebotomist release the tourniquet?

After the needle is inserted and the blood starts to flow.

The term "butterfly" refers to a...

Winged infusion set

During a venipuncture procedure the needle should always be inserted with the...

Bevel side up

Why should blood and urine specimens for microbiological culture be transported to the lab quickly?

To improve the likelihood of detecting pathogens.

How long do normal blood specimens take to clot?

30 to 60 minutes

Bar codes in phlebotomy applications are not used to denote.....

Patient arm preference

The preferred anticoagulant for the collection of whole blood in STAT situations in clinical chemistry is...

Heparin

A 16 gauge needle is larger than a 24 gauge needle because..

The smallest number denotes the largest gauge needle.

A blood cell counts requires whole blood collected in a...

Purple-topped tube.

Color coding of needles indicates..

Gauge

The yellow-topped collection tube has what as an additive?

Polyanetholesufonate (SPS)

For newborns, the penetration depth of lancets for blood collection must be less than..

2.0mm

If a blood specimen has a separation device it should be..

Centrifuged once

What should the health care worker use to chill a blood specimen as it is being transported?

Icy water