Medical Assisting| Phlebotomy NHA 180
Pre-Assessment Test| Latest Questions
and Answers| Graded A+
A medical assistant is preparing to perform venipuncture. What is the first step the assistant
should take?
Verify the patient’s identity using two identifiers, such as full name and date of birth, before
proceeding with the procedure.
When drawing blood from a patient with small veins, which gauge needle should the medical
assistant select?
A 23-gauge needle is recommended for smaller veins to reduce the risk of vein damage.
What is the correct order of draw for a venipuncture procedure?
Blood culture bottles, light blue (sodium citrate), red (serum), green (heparin), lavender
(EDTA), gray (sodium fluoride).
What action should a medical assistant take if a hematoma begins to form during a venipuncture?
Stop the procedure immediately, remove the needle, apply direct pressure to the site, and
elevate the arm.
1
,How long should a medical assistant apply pressure to the puncture site after removing the
needle in a patient on anticoagulant therapy?
Apply pressure for at least 5 minutes to prevent excessive bleeding.
Which vein is most commonly used for venipuncture in adults?
The median cubital vein, located in the antecubital fossa, is the preferred vein for blood
collection.
What is the proper procedure for labeling blood collection tubes after a venipuncture?
Label the tubes immediately after collection, including the patient’s name, date of birth, date,
and time of collection.
What action should a medical assistant take if a patient faints during a venipuncture?
Remove the needle, lay the patient down, elevate their legs, and monitor their condition.
How should a medical assistant cleanse the site before performing a venipuncture?
Use a 70% isopropyl alcohol pad, cleaning in a circular motion from the center outward, and
allow the area to dry completely.
Which of the following is the maximum amount of blood that can be drawn from an adult in one
session without causing harm?
No more than 100 mL/kg body weight should be drawn during a single session to prevent
hypovolemia.
2
,A medical assistant is performing a capillary puncture on a patient’s fingertip. Which action
should the assistant take?
Wipe away the first drop of blood with gauze to ensure accurate test results.
How should a medical assistant handle a needle after performing venipuncture?
Immediately dispose of the needle in a sharps container without recapping to avoid
needlestick injuries.
What is the purpose of using a tourniquet during venipuncture?
The tourniquet temporarily restricts venous blood flow, making veins easier to locate and
puncture.
How long should the tourniquet be left in place during a venipuncture procedure?
The tourniquet should not remain on the arm for more than 1 minute to prevent
hemoconcentration.
What is the appropriate action if a patient expresses a fear of needles before venipuncture?
Calmly explain the procedure, use relaxation techniques, and offer to allow the patient to lie
down if necessary.
What should a medical assistant do if blood flow stops midway through a venipuncture?
3
, Slightly reposition the needle, or if unsuccessful, discontinue the attempt and use another
site.
A medical assistant is preparing to perform a blood draw using a butterfly needle on a pediatric
patient. What is the correct angle of insertion?
The needle should be inserted at a 15- to 30-degree angle for a venipuncture.
What is the appropriate tube for collecting a blood specimen for a complete blood count (CBC)?
A lavender-topped tube containing EDTA should be used for CBC collection.
What is the correct method for performing a heel puncture on an infant?
Use a lancet to puncture the outer edge of the heel and collect blood into a capillary tube,
avoiding the calcaneus bone.
When collecting a blood specimen for coagulation studies, which tube should be used?
A light blue-topped tube containing sodium citrate is used for coagulation studies.
How should a medical assistant handle a patient’s request to stop a venipuncture procedure
midway?
Respect the patient's request, stop the procedure, and explain the next steps to ensure the
patient’s safety.
4
Pre-Assessment Test| Latest Questions
and Answers| Graded A+
A medical assistant is preparing to perform venipuncture. What is the first step the assistant
should take?
Verify the patient’s identity using two identifiers, such as full name and date of birth, before
proceeding with the procedure.
When drawing blood from a patient with small veins, which gauge needle should the medical
assistant select?
A 23-gauge needle is recommended for smaller veins to reduce the risk of vein damage.
What is the correct order of draw for a venipuncture procedure?
Blood culture bottles, light blue (sodium citrate), red (serum), green (heparin), lavender
(EDTA), gray (sodium fluoride).
What action should a medical assistant take if a hematoma begins to form during a venipuncture?
Stop the procedure immediately, remove the needle, apply direct pressure to the site, and
elevate the arm.
1
,How long should a medical assistant apply pressure to the puncture site after removing the
needle in a patient on anticoagulant therapy?
Apply pressure for at least 5 minutes to prevent excessive bleeding.
Which vein is most commonly used for venipuncture in adults?
The median cubital vein, located in the antecubital fossa, is the preferred vein for blood
collection.
What is the proper procedure for labeling blood collection tubes after a venipuncture?
Label the tubes immediately after collection, including the patient’s name, date of birth, date,
and time of collection.
What action should a medical assistant take if a patient faints during a venipuncture?
Remove the needle, lay the patient down, elevate their legs, and monitor their condition.
How should a medical assistant cleanse the site before performing a venipuncture?
Use a 70% isopropyl alcohol pad, cleaning in a circular motion from the center outward, and
allow the area to dry completely.
Which of the following is the maximum amount of blood that can be drawn from an adult in one
session without causing harm?
No more than 100 mL/kg body weight should be drawn during a single session to prevent
hypovolemia.
2
,A medical assistant is performing a capillary puncture on a patient’s fingertip. Which action
should the assistant take?
Wipe away the first drop of blood with gauze to ensure accurate test results.
How should a medical assistant handle a needle after performing venipuncture?
Immediately dispose of the needle in a sharps container without recapping to avoid
needlestick injuries.
What is the purpose of using a tourniquet during venipuncture?
The tourniquet temporarily restricts venous blood flow, making veins easier to locate and
puncture.
How long should the tourniquet be left in place during a venipuncture procedure?
The tourniquet should not remain on the arm for more than 1 minute to prevent
hemoconcentration.
What is the appropriate action if a patient expresses a fear of needles before venipuncture?
Calmly explain the procedure, use relaxation techniques, and offer to allow the patient to lie
down if necessary.
What should a medical assistant do if blood flow stops midway through a venipuncture?
3
, Slightly reposition the needle, or if unsuccessful, discontinue the attempt and use another
site.
A medical assistant is preparing to perform a blood draw using a butterfly needle on a pediatric
patient. What is the correct angle of insertion?
The needle should be inserted at a 15- to 30-degree angle for a venipuncture.
What is the appropriate tube for collecting a blood specimen for a complete blood count (CBC)?
A lavender-topped tube containing EDTA should be used for CBC collection.
What is the correct method for performing a heel puncture on an infant?
Use a lancet to puncture the outer edge of the heel and collect blood into a capillary tube,
avoiding the calcaneus bone.
When collecting a blood specimen for coagulation studies, which tube should be used?
A light blue-topped tube containing sodium citrate is used for coagulation studies.
How should a medical assistant handle a patient’s request to stop a venipuncture procedure
midway?
Respect the patient's request, stop the procedure, and explain the next steps to ensure the
patient’s safety.
4
