#1
What is the primary purpose of using a tourniquet during venipuncture?
To restrict blood flow
ExplanationTo temporarily stop blood flow and make veins more visible and accessible for puncture.
#2
Which vein is commonly used for venipuncture in adults?
Cephalic vein
ExplanationAs it's large and easily accessible, especially in the arm.
#3
What is the recommended technique for properly identifying a patient before venipuncture?
Check the patient's ID bracelet
ExplanationEnsures the right patient receives the correct treatment.
#4
What is the purpose of 'wiping away the first drop' of blood before collecting a sample?
To minimize the risk of contamination
ExplanationRemoves potential contaminants from the puncture site.
#5
What is the proper order of steps for hand hygiene before performing venipuncture?
Wash hands with soap and water, then dry with a paper towel
ExplanationEffective hand hygiene reduces the risk of infection transmission.
#6
What is the standard angle for inserting a needle during routine venipuncture?
45 degrees
ExplanationOptimal for accessing veins without puncturing through.
#7
Which of the following is NOT a recommended practice for reducing pain during venipuncture?
Asking the patient to clench their fist
ExplanationMay increase discomfort and cause veins to collapse.
#8
What is the recommended order of draw when collecting multiple blood samples?
Green, Red, Blue, Gray, Lavender
ExplanationTo avoid contamination or altering results by incompatible additives.
#9
Which of the following factors can affect the accuracy of blood test results?
All of the above
ExplanationExternal factors such as timing, handling, and patient's condition can all influence results.
#10
What should a phlebotomist do if blood flow suddenly stops during venipuncture?
Apply pressure above the site
ExplanationHelps control bleeding and prevents hematoma formation.
#11
What is the primary purpose of palpating the vein before venipuncture?
To determine the size and depth of the vein
ExplanationEnsures proper vein selection and reduces the risk of multiple attempts.
#12
In which situation should a phlebotomist avoid using the antecubital vein for venipuncture?
When the patient has fragile veins
ExplanationTo prevent potential complications such as hematoma.
#13
Which of the following is NOT a potential complication of venipuncture?
Hyperglycemia
ExplanationHyperglycemia is a medical condition and not directly related to the procedure.
#14
What should a phlebotomist do if a patient experiences syncope (fainting) during venipuncture?
Leave the needle in place and elevate the patient's legs
ExplanationPrevents potential injuries and helps restore blood flow to the brain.
#15
Which of the following is a common complication of venipuncture in elderly patients?
Increased vein fragility
ExplanationDue to age-related changes in vascular structure.
#16
What should be done if a patient reports feeling dizzy or lightheaded during venipuncture?
Stop the procedure and assist the patient to a reclining position
ExplanationPrevents potential injuries and helps restore blood flow to the brain.
#17
Which of the following is a potential cause of a collapsed vein during venipuncture?
Failing to anchor the vein
ExplanationAllows the vein to roll or move, increasing the risk of collapse.