Question 1

A patient who is taking warfarin has an international normalized ratio (INR) of 5.5. The nurse will anticipate giving which of the following?

Accepted Answer

An INR of 5.5 indicates that the patient is at risk for bleeding due to excessive anticoagulation with warfarin. The reversal agent for warfarin is vitamin K, which is given orally to reverse the effects of the medication and lower the INR back to the therapeutic range. Fresh frozen plasma and protamine sulfate are reversal agents for heparin, not warfarin. Intravenous iron is used to treat anemia, which is not a concern in this patient.

Question 2

The nurse is assessing a patient prior to administering thrombolytic therapy. Which is an important assessment for this patient?

Accepted Answer

Before administering thrombolytic therapy, it's crucial to assess which medications the patient takes for discomfort or pain, especially because some over-the-counter pain medications, like aspirin or NSAIDs, can increase bleeding risk, which is a significant concern when administering thrombolytics.

Question 3

A patient has been receiving intravenous heparin. When laboratory tests are drawn, the nurse has difficulty stopping bleeding at the puncture site. The patient has bloody stools and is reporting abdominal pain. The nurse notes elevated partial thromboplastin time (PTT) and activated PPT (aPTT). Which action will the nurse perform?

Accepted Answer

The patient is experiencing signs and symptoms of heparin overdose, including bleeding, elevated PTT and aPTT, and bloody stools. Protamine sulfate is the antidote for heparin and should be given to reverse its effects. Oral warfarin, vitamin K, and subcutaneous heparin are not appropriate interventions for an acute heparin overdose.

Question 4

The nurse is teaching a patient who will begin taking warfarin (Coumadin) for atrial fibrillation. Which statement by the patient indicates understanding of the teaching?

Accepted Answer

It is important for patients taking warfarin to inform all health care providers, including dentists, of their medication use to prevent bleeding complications during procedures. It is not recommended to eat large amounts of green, leafy vegetables while taking warfarin as they can affect the medication's effectiveness. NSAIDs increase the risk of bleeding and should be avoided while taking warfarin. Cimetidine is not used to prevent gastric irritation and bleeding while taking warfarin.

Question 5

The nurse is assessing a patient who takes warfarin (Coumadin). The nurse notes a heart rate of 92 beats per minute and a blood pressure of 88/78 mm Hg. To evaluate the reason for these vital signs, the nurse will assess which of the following?

Accepted Answer

Warfarin (Coumadin) is an anticoagulant medication that can increase the risk of bleeding. The nurse would assess for signs of bleeding such as bleeding gums, nosebleeds, and bruises on the skin to evaluate the reason for the patient's tachycardia and hypotension, which could be symptoms of internal bleeding or hemorrhage.

Question 6

A patient experiences a blood clot in one leg, and the provider has ordered a thrombolytic medication. The patient learns that the medication is expensive and asks the nurse if it is necessary. Which response by the nurse is correct?

Accepted Answer

Thrombolytic medications are used to dissolve blood clots and prevent permanent tissue damage. Aspirin is not as effective in treating blood clots and should not be substituted for thrombolytic medications. Additionally, the body may eventually break down the clot, but this can take time and result in further tissue damage. It is important to follow the provider's orders and take the prescribed medication to prevent serious complications.

Question 7

Which of the following is NOT considered a potential life threatening adverse reaction to clopidogrel (Plavix) use?

Accepted Answer

Ischemic stroke is not considered a potential life-threatening adverse reaction to clopidogrel use; instead, clopidogrel is often used to prevent such events in patients at risk.

Question 8

A patient who has recently had a myocardial infarction (MI) will begin taking clopidogrel (Plavix) to prevent a second MI. Which medication will the nurse expect the provider to order as adjunctive therapy for this patient?

Accepted Answer

Aspirin is commonly prescribed as adjunctive therapy with clopidogrel to prevent a second myocardial infarction. Enoxaparin sodium, Ticagrelor, and Warfarin are not typically used as adjunctive therapy with clopidogrel in this situation.

Question 9

Which of the following thrombolytics carries a higher risk for anaphylaxis?

Accepted Answer

Streptokinase has been associated with a higher risk of anaphylaxis compared to other thrombolytics.

Question 10

The nurse is caring for a postoperative patient who is receiving alteplase tPA (Activase) after developing a blood clot. The nurse notes a heart rate of 110 beats per minute and a blood pressure of 90/60 mm Hg. The nurse will perform which action?

Accepted Answer

Alteplase tPA (Activase) is a thrombolytic agent used to dissolve blood clots, which increases the risk of bleeding. The nurse should assess for signs of bleeding, including checking the surgical dressing, especially if the patient shows signs of potential bleeding such as tachycardia (heart rate of 110 beats per minute) and hypotension (blood pressure of 90/60 mm Hg).

Question 11

The nurse is preparing to administer a first dose of clopidogrel (Plavix) to a patient. As part of the history, the nurse learns that the patient has a previous history of peptic ulcers, diabetes, hyperlipidemia, and hypertension. The nurse understands that which of these conditions warrants caution with clopidogrel treatment?

Accepted Answer

Peptic ulcer disease warrants caution with clopidogrel treatment as the medication can increase the risk of bleeding in the stomach, which can exacerbate the ulcer. The other conditions listed do not require special caution with clopidogrel treatment.

Question 12

The nurse is caring for a patient who is receiving warfarin (Coumadin) and notes bruising and petechiae on the patient's extremities. The nurse will request an order for which laboratory test?

Accepted Answer

The International Normalized Ratio (INR) is the most appropriate test to monitor the therapeutic effect of warfarin (Coumadin) and assess for over-anticoagulation, which can lead to bruising and petechiae.

Question 13

A patient who has received heparin after previous surgeries will be given enoxaparin sodium (Lovenox) after knee-replacement surgery. The patient asks how this drug is different from heparin. The nurse will explain that the benefit of enoxaparin over heparin is that it:

Accepted Answer

Enoxaparin (Lovenox) is a low molecular weight heparin that has a more predictable anticoagulant response than unfractionated heparin, thus decreasing the need for frequent laboratory monitoring (such as aPTT tests) that is often required with heparin therapy.

Question 14

A patient is receiving a thrombolytic medication. The patient calls the nurse to report having bloody diarrhea. The nurse will anticipate administering which medication?

Accepted Answer

Bloody diarrhea is a sign of gastrointestinal bleeding, which is a potential adverse effect of thrombolytic medications. Aminocaproic acid can be used to treat bleeding associated with the use of thrombolytics. Enoxaparin, protamine sulfate, and vitamin K would not be appropriate for this situation.

Question 15

A patient is taking clopidogrel (Plavix). When teaching this patient about dietary restrictions while taking this medication, the nurse will instruct the patient to avoid excessive consumption of which food?

Accepted Answer

Garlic can increase the risk of bleeding when taken with clopidogrel (Plavix), a medication that inhibits platelet aggregation. Patients should be advised to avoid excessive consumption of garlic to prevent an increased risk of bleeding.

Question 16

The nurse is caring for a postoperative patient. The nurse will anticipate administering which medication to this patient to help prevent thrombus formation caused by slow venous blood flow?

Accepted Answer

Low-molecular-weight heparin is an anticoagulant medication that is commonly used to prevent thrombus formation caused by slow venous blood flow in postoperative patients. Alteplase is a thrombolytic medication used to dissolve blood clots, aspirin and clopidogrel are antiplatelet medications used to prevent blood clots from forming in arteries.

Question 17

A nursing student asks why the anticoagulant heparin is given to patients who have disseminated intravascular coagulation (DIC) and are at risk for excessive bleeding. The nurse will explain that heparin is used in this case for which reason?

Accepted Answer

Heparin is given to patients with DIC to decrease the risk of venous thrombosis. DIC causes blood clots to form in small blood vessels throughout the body, using up clotting factors and platelets. This can lead to bleeding, and heparin helps to prevent further clotting and decrease the risk of venous thrombosis. Heparin does not dissolve clots as they form or enhance the formation of fibrous clots. It may temporarily preserve platelet function, but this is not the primary reason for its use in DIC.

Question 18

A patient who is taking clopidogrel (Plavix) and aspirin is preparing for orthopedic surgery. The nurse will consult with the surgeon and provide which instruction to the patient?

Accepted Answer

Both clopidogrel and aspirin increase bleeding risk. Stopping them 7 days prior to surgery reduces this risk while allowing time for their effects to diminish.

Quiz 40: Anticoagulants, Antiplatelets, and Thrombolytics