Practice Test 2 - Critical Thinking Flashcards
According to Eisenhower’s “Urgent/Important” Principles which of these four tasks has the second-highest priority?
a) A high urgency, high importance task
b) A high urgency, low importance task
c) A low urgency, high importance task
d) A low urgency, low importance task
c) A low urgency, high importance task
Highest priority: high urgency, high importance task
2nd highest priority: low urgency, high importance task
3rd highest priority: high urgency, low importance task
Lowest priority: low urgency, low importance task
The process of checking and rectifying the precision and accuracy of a measuring instrument is called?
a) calibration
b) estimation
c) graduation
d) menstruation
a) calibration
A phlebotomist is peforming venipuncture on a difficult vein using a butterfly. The phlebotomist has to collect an SST and light blue-topped tube. How should the phlebotomist proceed?
a) Collect the SST first then the light blue top tube
b) Collect the light blue top tube first then the SST
c) Draw a clear tube first, then collect the light blue top tube, then the SST
d) Draw half of the SST first, then collect the light blue top tube, then finish the SST
c) Draw a clear tube first, then collect the light blue top tube, then the SST
If a winged blood collection device (butterfly) iis used too collect a light-blue top tube, a waste (clearr) tube should be drawn first to remove the air in the tubing of the butterfly. If the air is not removed first, then the air will be drawn into the light-blue tube, which will affect the blood-to-anticoagulant ratio and cause erroneous results.
Furthermore, the light blue tube must be drawn before the SST, to avoid the clot activator in the SST from contaminating the light blue tube.
A phlebotomist has finished drawing blood into a citrate tube for PT testing. However, the blood in the tube is below the minimum line. The phlebotomist should:
a) fill another citrate tube partly full and mix the two tubes
b) pour a little blood from another tube into the citrate tube
c) repeat the procedure with a new citrate tube
d) submit the tube for testing as usual
c) repeat the procedure with a new citrate tube
The citrate (blue-topped) tube is the most sensitive tube to underfilling. The ratio of blood to sodium citrate in this tube must be 9:1. If the tube is underfilled, the concentration of anticoagulant will be too high, causing falsely prolonged PT and PTT results.
For this reason, it is important to fill the tube to the indicated line.
If a citrate tube is underfilled, the best course of action is to repeat thee blood collection procedure with a new citrate tube to ensure an adequate and uncontaminated sample.
A phlebotomist needs to collect a blood sample for a coagulation test but the patient has an IV in the left arm near the wrist and a hematoma in the antecubital area of the right arm. Which of the following is the best place to collect the specimen?
a) Above the IV site
b) Distal to the hematoma
c) From the IV
d) From the patient’s leg
b) Distal to the hematoma
If one arm has a hematoma and the other arm is not available for venipuncture, then venipuncture should be performed from a site distal to the hematoma.
Above the IV site is the wrong answer because collecting the sample above the IV site could contaminate the sample with fluids or medications infused through the IV, potentially leading to inaccurate test results.
From the IV is the wrong answer because thee IV line may contain anticoagulants or other substances that can interfere with the test results.
From the patient’s leg is the wrong answer because leg veins are generally not preferred for coagulation tests. The blood flow from leg veins may differ from arm veins, potentially affecting the test results.
If a patient is having blood drawn for a prothrombin time test, you might expect:
a) the patient to be fasting
b) the patient to bleed for a long time
c) to have a difficulty filling the tube
d) too have to mix the tube more
b) the patient to bleed for a long time
The prothrombin time (PT) test evaluates blood clotting. A doctor would order a PT test if the patient bleeds excessively.
A phlebotomist has mixed up two specimens. What should the phlebotomist do?
a) Ask the nurse to identify the specimen
b) Ask the patients which one is theirs
c) Continue regardless
d) Retake both specimen
d) Retake both specimen
In this scenario, the only way to be sure which specimen is which is to retake both specimens.
