Question 1

Which of the following is a combination system that can be used with the syringe or the vacuum tube?

Accepted Answer

The butterfly collection system is a combination system that can be used with both syringe and vacuum tube methods of blood collection. Capillary puncture system is strictly limited to capillary blood collection, Hematology system is a method of analyzing blood samples in a laboratory, and Blood culture system is used to detect bacterial infections in the blood.

Question 2

Which of the following is the usual site for capillary puncture in adults?

Accepted Answer

Fingertip is the usual site for capillary puncture in adults as it has an abundant blood supply and is easily accessible. Earlobe is usually used in infants and young children. Heel and toe are primarily used in neonates.

Question 3

Place the steps of blood clotting in correct sequence as it occurs.? 1.calcium utilized 4.fibrinogen converts to fibrin?
2)clot forms5.prothrombin converts to thrombin?
3)uncoagulated blood

Accepted Answer

The correct sequence for blood clotting starts with uncoagulated blood (3), followed by the utilization of calcium (1), conversion of prothrombin to thrombin (5), conversion of fibrinogen to fibrin (4), and finally, the clot forms (2).

Question 4

Which of the following is the usual site for capillary puncture in infants?

Accepted Answer

The heel is the usual site for capillary puncture in infants because it has a good blood supply and is less painful than puncturing the fingertip.

Question 5

Which of the following is NOT a factor that can affect laboratory values?

Accepted Answer

All of the other factors listed (fasting, heparin, exercise) can affect laboratory values. However, leaving the tourniquet on for one minute or less is the standard protocol for collecting blood samples and should not affect the results.

Question 6

Which of the following method(s) is used to perform a venipuncture?

Accepted Answer

All three methods (syringe, vacuum tube, butterfly) can be used to perform a venipuncture, and each method has its advantages and disadvantages depending on factors such as patient age, vein size, and the amount of blood needed. Therefore, choosing the appropriate method for each individual patient and situation is important.

Question 7

Indicate whether each item applies to the syringe method or the vacuum tube system.

-Do not need to use a blood transfer device.

Accepted Answer

The statement applies to vacuum tube system because vacuum tubes are designed to be directly attached to the needle, eliminating the need for a blood transfer device. Syringe method, on the other hand, requires a blood transfer device to transfer blood from the syringe to the collection tube.

Question 8

Which of the following is NOT one of the arteries of the arm?

Accepted Answer

The femoral artery is not an artery of the arm, but rather an artery in the thigh. The radial, brachial, and ulnar arteries are all arteries of the arm.

Question 9

When performing a venipuncture, which vein is used the majority of the time?

Accepted Answer

The median cubital vein is the most commonly used vein for venipuncture because it is large, easy to locate, and minimizes the risk of nerve damage or arterial puncture.

Question 10

Which of the following best describes the cause of hemolysis?

Accepted Answer

Puncturing the skin before allowing the alcohol to dry completely can cause hemolysis because alcohol can damage and weaken the red blood cells. When a needle is inserted into the vessel after the alcohol has not completely evaporated, the alcohol can cause the red blood cell to break open or lyse, releasing its contents into the sample.

Question 11

Pressure to the site must be held longer than 2 to 3 minutes after a venipuncture is performed if the patient is taking which of the following?

Accepted Answer

All of the options listed, Coumadin, Aspirin, and Ginko biloba, have blood-thinning properties or can affect blood clotting. Therefore, after a venipuncture, pressure must be applied to the site for longer than the usual 2 to 3 minutes to ensure proper clotting and prevent excessive bleeding.

Question 12

Which of the following is NOT a quality assurance control?

Accepted Answer

Having specimens in syringes with needles still attached is a safety issue and not a quality assurance control. It can lead to accidental needlestick injuries and contamination of specimens.

Question 13

Which of the following is NOT an appropriate action when collecting a capillary blood sample?

Accepted Answer

Using the first drop of blood may be contaminated with tissue fluid, which can affect the accuracy of the results. Collecting blood with capillary tubes and massaging the finger gently to promote blood flow are appropriate actions. It is important to avoid squeezing the fingertip to prevent hemolysis of red blood cells.

Question 14

Indicate whether each item applies to the syringe method or the vacuum tube system.

-This has vacuum in the tubes.

Accepted Answer

The clue "vacuum in the tubes" clearly indicates the vacuum tube system. The syringe method involves manually drawing blood into a syringe without the use of vacuum tubes.

Question 15

Which of the following is in a mixture of blood obtained from capillary puncture specimens?

Accepted Answer

Capillary puncture specimens contain a mixture of blood from arterioles, venules, and interstitial fluid due to the nature of the puncture site being in the capillary bed, which is a network of small blood vessels that connect arterioles and venules.

Question 16

Which of the following is the most appropriate next step when a medical assistant attempts a venipuncture on an adult patient and cannot obtain a sample, and a second medical assistant is also unsuccessful?

Accepted Answer

If two medical assistants have been unable to obtain a blood sample, it is appropriate to inform the physician. Additional steps may be taken based on the physician's recommendation, which may include ordering a different type of test, sending the patient to a laboratory for the blood draw, or requesting the services of a more experienced phlebotomist. Choices A and B may be appropriate earlier in the process, but after two failed attempts, it is time to escalate the matter to the attention of the physician. Choice D is not ideal because it delays necessary medical tests, and the patient may not be available to return the next day.

Question 17

Indicate whether each item applies to the syringe method or the vacuum tube system.

-This uses a multi-draw needle.

Accepted Answer

The multi-draw needle is part of the vacuum tube system, which uses a single needle to collect multiple blood samples in separate tubes. The syringe method involves using a separate needle for each sample.

Question 18

Indicate whether each item applies to the syringe method or the vacuum tube system.

-Vacuum is created when plunger is pulled.

Accepted Answer

In the syringe method, a vacuum is created manually when the plunger of the syringe is pulled back, drawing blood into the syringe barrel. The vacuum tube system, on the other hand, uses pre-evacuated tubes that automatically draw blood when the tube's stopper is pierced by a needle.

Question 19

When using the safer plastic vacuum tubes, which of the following is the correct order of draw?

Accepted Answer

The correct order of draw when using plastic vacuum tubes is to start with blood cultures to avoid contamination, followed by coagulation tubes (blue top with citrate), and then serum tubes (red top and/or SST). This sequence helps prevent cross-contamination and ensures the accuracy of test results.

Question 20

Indicate whether each item applies to the syringe method or the vacuum tube system.

-This is used less often in venipuncture.

Accepted Answer

The syringe method is used less often in venipuncture compared to the vacuum tube system because the vacuum tube system is more efficient and reduces the risk of needlestick injuries.

Quiz 39: Phlebotomy: Venipuncture and Capillary Puncture

Which of the following is a combination system that can be used with the syringe or the vacuum tube?

Which of the following is the usual site for capillary puncture in adults?

Place the steps of blood clotting in correct sequence as it occurs.? 1.calcium utilized 4.fibrinogen converts to fibrin? 2) clot forms5.prothrombin converts to thrombin? 3) uncoagulated blood

Which of the following is the usual site for capillary puncture in infants?

Which of the following is NOT a factor that can affect laboratory values?

Which of the following method(s) is used to perform a venipuncture?

Indicate whether each item applies to the syringe method or the vacuum tube system. -Do not need to use a blood transfer device.

Which of the following is NOT one of the arteries of the arm?

When performing a venipuncture, which vein is used the majority of the time?

Which of the following best describes the cause of hemolysis?

Pressure to the site must be held longer than 2 to 3 minutes after a venipuncture is performed if the patient is taking which of the following?

Which of the following is NOT a quality assurance control?

Which of the following is NOT an appropriate action when collecting a capillary blood sample?

Indicate whether each item applies to the syringe method or the vacuum tube system. -This has vacuum in the tubes.

Which of the following is in a mixture of blood obtained from capillary puncture specimens?

Which of the following is the most appropriate next step when a medical assistant attempts a venipuncture on an adult patient and cannot obtain a sample, and a second medical assistant is also unsuccessful?

Indicate whether each item applies to the syringe method or the vacuum tube system. -This uses a multi-draw needle.

Indicate whether each item applies to the syringe method or the vacuum tube system. -Vacuum is created when plunger is pulled.

When using the safer plastic vacuum tubes, which of the following is the correct order of draw?

Indicate whether each item applies to the syringe method or the vacuum tube system. -This is used less often in venipuncture.