MEDCA exam study guide Phlebotomy 50 Questions with Verified Answers
When blood is removed from the body, the blood clots and the liquid part is called
... [Show More] - CORRECT ANSWER Serum
If veins in the arms cannot be used for venipuncture, the alternative veins can be found in the - CORRECT ANSWER Dorsal side of hands and wrists
The instrument used to speed the removal of serum by spinning the blood is called a - CORRECT ANSWER Centrifuge
Before performing a venipuncture, a clean pair of gloves should be put on the presence of the patient because it is a reassuring - CORRECT ANSWER Safety concious gesture for both the worker and the patient.
Lying face up on their back is called what position? - CORRECT ANSWER Supine position
To avoid blood-clotting in the collection tube, it is extremely important the blood in the.. - CORRECT ANSWER Purple-topped tube be gently inverted a minimum of eight times.
What is the normal ph range of a normal body? - CORRECT ANSWER 7.35 to 7.45
Serum should be transported to the laboratory for testing and separated from blood cells within what time limit? - CORRECT ANSWER Within 2 hours
Of the total volume of blood, how much percent is liquid - CORRECT ANSWER 55% is liquid
A person who has too little hemoglobin or a decreased number of red blood cells is known to be - CORRECT ANSWER Anemic
Where do blood cells begin their formation? - CORRECT ANSWER In the lymph nodes and bone marrow.
If the phlebotomist collects blood in the neonatalogy department, how old is the patient? - CORRECT ANSWER Hours to a few days old.
The iron containing pigment of the red blood cells is called - CORRECT ANSWER Hemoglobin
How long do mature red blood cells live once they have entered the blood stream? - CORRECT ANSWER Approximately 120 days
Approximately how many liters of blood does the body contain? - CORRECT ANSWER Approximately 5 liters of blood
The study of the nature and cause of disease is called - CORRECT ANSWER Pathology
A specifically labeled puncture-resistant container for the disposal of needles, scalpels and syringes is known as the. . - CORRECT ANSWER Sharps container
When drawing blood, which vein is most preferred? - CORRECT ANSWER The median cubital
If blood pressure is read 120/80, which is the systolic pressure? - CORRECT ANSWER 120
What is systolic pressure? - CORRECT ANSWER The pressure when the heart is contracted.
A chemical substance that prevents the heart from clogging is called an... - CORRECT ANSWER Anticoagulant
Steady-state condition is referred to as - CORRECT ANSWER Homeostasis
What cannot be converted into bar code symbols? - CORRECT ANSWER Handwritten information
What is interstitial fluid? - CORRECT ANSWER Tissue fluid
Fragile veins are most likely to be found in what kind of patient? - CORRECT ANSWER Geriatric patients
After a finger stick is performed what should the phlebotomist do first. - CORRECT ANSWER Wipe away the first drop of blood with a gauze.
What is the best angle for spreading a blood smear using two slides? - CORRECT ANSWER A 30 degree angle.
What are skin puncture samples often used for? - CORRECT ANSWER White blood cell differentials.
During a skin puncture procedure, the cut should be across the - CORRECT ANSWER Fingerprint lines.
In most cases, when should blood be drawn to determine medication levels? - CORRECT ANSWER Prior to the next dose of medication given.
In relation to veins, what does the term occluded mean? - CORRECT ANSWER Obstructed.
The thumb has a.. - CORRECT ANSWER Pulse
What is the last step in any phlebotomy procedure, including skin puncture? - CORRECT ANSWER 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? - CORRECT ANSWER Wash them with soap and water.
How long should the alcohol be allowed to dry before venipuncture? - CORRECT ANSWER 30 to 60 seconds
During a venipuncture what is the best angle for inserting the needle into the skin? - CORRECT ANSWER 15 to 30 degrees
During a venipuncture, when does the phlebotomist release the tourniquet? - CORRECT ANSWER After the needle is inserted and the blood starts to flow.
The term "butterfly" refers to a... - CORRECT ANSWER Winged infusion set
During a venipuncture procedure the needle should always be inserted with the... - CORRECT ANSWER Bevel side up
Why should blood and urine specimens for microbiological culture be transported to the lab quickly? - CORRECT ANSWER To improve the likelihood of detecting pathogens.
How long do normal blood specimens take to clot? - CORRECT ANSWER 30 to 60 minutes
Bar codes in phlebotomy applications are not used to denote..... - CORRECT ANSWER Patient arm preference
The preferred anticoagulant for the collection of whole blood in STAT situations in clinical chemistry is... - CORRECT ANSWER Heparin
A 16 gauge needle is larger than a 24 gauge needle because.. - CORRECT ANSWER The smallest number denotes the largest gauge needle.
A blood cell counts requires whole blood collected in a... - CORRECT ANSWER Purple-topped tube.
Color coding of needles indicates.. - CORRECT ANSWER Gauge
The yellow-topped collection tube has what as an additive? - CORRECT ANSWER Polyanetholesufonate (SPS)
For newborns, the penetration depth of lancets for blood collection must be less than.. - CORRECT ANSWER 2.0mm
If a blood specimen has a separation device it should be.. - CORRECT ANSWER Centrifuged once
What should the health care worker use to chill a blood specimen as it is being transported? - CORRECT ANSWER Icy water [Show Less]
