Nursing practice questions with comprehensive rationales
NurseDive Free Nursing Practice Question
A nurse is caring for a patient who is receiving heparin therapy via continuous IV infusion for treatment of deep vein thrombosis (DVT). The nurse should monitor which of the following laboratory values to evaluate therapeutic effectiveness of heparin therapy?
A. Activated partial thromboplastin time (aPTT)
The correct answer is choice A) Activated partial thromboplastin time (aPTT).This is because aPTT is the most commonly used laboratory test to monitor the therapeutic effect of heparin therapy. Heparin is an anticoagulant that inhibits the formation of thrombin and fibrin, which are essential for blood clotting.Heparin therapy is indicated for the treatment of deep vein thrombosis (DVT), which is a condition where blood clots form in the deep veins of the legs or pelvis.
B. Prothrombin time (PT)
Choice B) Prothrombin time (PT) is wrong because PT is used to monitor the therapeutic effect of warfarin therapy, not heparin therapy. Warfarin is another anticoagulant that inhibits the synthesis of vitamin K-dependent clotting factors.Warfarin therapy is also indicated for the treatment of DVT, but it has a different mechanism of action and monitoring than heparin therapy.
C. International normalized ratio (INR)
Choice C) International normalized ratio (INR) is wrong because INR is a standardized way of reporting PT results that accounts for the variability of different laboratory methods.INR is also used to monitor the therapeutic effect of warfarin therapy, not heparin therapy.
D. Platelet count
Choice D) Platelet count is wrong because platelet count is not directly affected by heparin therapy.However, platelet count should be monitored periodically in patients receiving heparin therapy to detect heparin-induced thrombocytopenia (HIT), which is a rare but serious complication of heparin therapy that causes a drop in platelet count and an increased risk of thrombosis.
E. Hemoglobin.
Choice E) Hemoglobin is wrong because hemoglobin is not directly affected by heparin therapy.However, hemoglobin should be monitored periodically in patients receiving heparin therapy to detect bleeding complications, which are the most common adverse effects of heparin therapy.
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Full Explanation
The correct answer is choice A) Activated partial thromboplastin time (aPTT). This is because aPTT is the most commonly used laboratory test to monitor the therapeutic effect of heparin therapy.
Heparin is an anticoagulant that inhibits the formation of thrombin and fibrin, which are essential for blood clotting. Heparin therapy is indicated for the treatment of deep vein thrombosis (DVT), which is a condition where blood clots form in the deep veins of the legs or pelvis.
Choice B) Prothrombin time (PT) is wrong because PT is used to monitor the therapeutic effect of warfarin therapy, not heparin therapy.
Warfarin is another anticoagulant that inhibits the synthesis of vitamin K-dependent clotting factors. Warfarin therapy is also indicated for the treatment of DVT, but it has a different mechanism of action and monitoring than heparin therapy.
Choice C) International normalized ratio (INR) is wrong because INR is a standardized way of reporting PT results that accounts for the variability of different laboratory methods. INR is also used to monitor the therapeutic effect of warfarin therapy, not heparin therapy.
Choice D) Platelet count is wrong because platelet count is not directly affected by heparin therapy. However, platelet count should be monitored periodically in patients receiving heparin therapy to detect heparin-induced thrombocytopenia (HIT), which is a rare but serious complication of heparin therapy that causes a drop in platelet count and an increased risk of thrombosis.
Choice E) Hemoglobin is wrong because hemoglobin is not directly affected by heparin therapy. However, hemoglobin should be monitored periodically in patients receiving heparin therapy to detect bleeding complications, which are the most common adverse effects of heparin therapy.
The normal range for aPTT is 25 to 35 seconds, but the therapeutic range for heparin therapy is usually 1.5 to 2.5 times the normal range, depending on the indication and protocol.
The normal range for PT is 11 to 13 seconds, and the therapeutic range for warfarin therapy is usually an INR of 2 to 3, depending on the indication and protocol
Similar Questions
A nurse is caring for a patient who has been prescribed enoxaparin (Lovenox) subcutaneously for prophylaxis against deep vein thrombosis (DVT). The nurse should instruct the patient to:
A. Avoid foods that are high in vitamin K.
Avoid foods that are high in vitamin K is wrong because vitamin K interacts with warfarin, another anticoagulant, but not with enoxaparin.Vitamin K helps the blood clot, so patients who take warfarin should avoid foods that are high in vitamin K, such as leafy green vegetables, broccoli, or liver.
B. Administer injections into areas with decreased subcutaneous tissue.
Administer injections into areas with decreased subcutaneous tissue is wrong because enoxaparin should be injected into areas with adequate subcutaneous tissue, such as the abdomen or the thighs.Injecting into areas with decreased subcutaneous tissue can cause bruising, pain, or hematoma formation.
C. Massage injection sites after administration.
Massage injection sites after administration is wrong because massaging the injection sites can cause bleeding, bruising, or irritation.Patients who take enoxaparin should not rub or press on the injection sites after administration.
D. Use a soft-bristled toothbrush.
This is because enoxaparin (Lovenox) is an anticoagulant that prevents blood clots by thinning the blood.Therefore, patients who take enoxaparin should avoid activities that can cause bleeding, such as using a hard-bristled toothbrush, flossing, shaving, or cutting their nails.
Full Explanation
The correct answer is choice D) Use a soft-bristled toothbrush.
This is because enoxaparin (Lovenox) is an anticoagulant that prevents blood clots by thinning the blood. Therefore, patients who take enoxaparin should avoid activities that can cause bleeding, such as using a hard-bristled toothbrush, flossing, shaving, or cutting their nails.
Choice A) Avoid foods that are high in vitamin K is wrong because vitamin K interacts with warfarin, another anticoagulant, but not with enoxaparin. Vitamin K helps the blood clot, so patients who take warfarin should avoid foods that are high in vitamin K, such as leafy green vegetables, broccoli, or liver.
Choice B) Administer injections into areas with decreased subcutaneous tissue is wrong because enoxaparin should be injected into areas with adequate subcutaneous tissue, such as the abdomen or the thighs. Injecting into areas with decreased subcutaneous tissue can cause bruising, pain, or hematoma formation.
Choice C) Massage injection sites after administration is wrong because massaging the injection sites can cause bleeding, bruising, or irritation. Patients who take enoxaparin should not rub or press on the injection sites after administration.
A client has been prescribed warfarin (Coumadin) for treatment of deep vein thrombosis (DVT). Which of the following instructions should the nurse include in patient teaching? Select all that apply.
A. Avoid foods that are high in vitamin K.
Vitamin K is needed for the production of some clotting factors in the liver. Warfarin blocks the action of vitamin K, and thus reduces the clotting ability of the blood. However, if the intake of vitamin K varies significantly from day to day, it can affect the stability of the warfarin effect.Foods that are high in vitamin K include green leafy vegetables, such as spinach, kale, broccoli, cabbage, and lettuce, as well as some vegetable oils, such as soybean and canola.Patients should not avoid these foods completely, but they should keep their intake consistent and inform their doctor or pharmacist if they make any changes to their diet.
B. Take aspirin for pain relief.
Aspirin is a medication that also prevents blood clots by inhibiting platelets, which are cells that stick together to form clots.Taking aspirin with warfarin can increase the risk of bleeding significantly and is not recommended unless prescribed by a doctor for a specific reason.Patients should avoid taking aspirin or other nonsteroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen or naproxen, for pain relief unless advised by their doctor.They should also check the labels of any over-the-counter medications or supplements they use and avoid those that contain aspirin or NSAIDs.
C. Report any unusual bleeding to healthcare provider.
Warfarin can increase the risk of bleeding, especially if the dose is too high or if it interacts with other medications or supplements.Patients should notify their doctor or seek emergency care if they have any signs of bleeding, such as bruising, red or black stools, blood in the urine, coughing up blood, vomiting blood, nosebleeds, heavy menstrual bleeding, headaches, dizziness, weakness, or swelling.They should also inform their doctor of any other medications or supplements they are taking, including over-the-counter products and herbal remedies.
D. Use an electric razor when shaving.
Warfarin can make the skin more prone to bleeding from minor cuts or injuries. Patients should use an electric razor when shaving to reduce the risk of nicking themselves and causing bleeding.They should also use a soft toothbrush and avoid flossing if it causes bleeding.They should wear gloves when handling sharp objects or working in the garden.
E. Wear shoes that fit well and avoid tight clothing.
This instruction is not related to warfarin therapy and does not affect its efficacy or safety. However, it may be a general advice for patients with DVT to prevent further complications or discomfort.Wearing shoes that fit well and avoiding tight clothing can help improve blood circulation in the legs and prevent swelling or pain.Patients with DVT should also elevate their legs when possible and wear compression stockings if prescribed by their doctor.
Full Explanation
Warfarin (Coumadin) is a blood thinner that prevents blood clots from forming or growing larger.
It is used to treat or prevent deep vein thrombosis (DVT), a condition in which a blood clot forms in a vein deep in the body, usually in the legs.
It can also prevent pulmonary embolism (PE), a condition in which a blood clot breaks off and travels to the lungs, blocking blood flow and causing breathing problems.
Patients taking warfarin should follow these instructions:
• Avoid foods that are high in vitamin K.
Vitamin K is needed for the production of some clotting factors in the liver.
Warfarin blocks the action of vitamin K, and thus reduces the clotting ability of the blood.
However, if the intake of vitamin K varies significantly from day to day, it can affect the stability of the warfarin effect. Foods that are high in vitamin K include green leafy vegetables, such as spinach, kale, broccoli, cabbage, and lettuce, as well as some vegetable oils, such as soybean and canola. Patients should not avoid these foods completely, but they should keep their intake consistent and inform their doctor or pharmacist if they make any changes to their diet.
• Report any unusual bleeding to healthcare provider.
Warfarin can increase the risk of bleeding, especially if the dose is too high or if it interacts with other medications or supplements. Patients should notify their doctor or seek emergency care if they have any signs of bleeding, such as bruising, red or black stools, blood in the urine, coughing up blood, vomiting blood, nosebleeds, heavy menstrual bleeding, headaches, dizziness, weakness, or swelling. They should also inform their doctor of any other medications or supplements they are taking, including over-the-counter products and herbal remedies.
• Use an electric razor when shaving.
Warfarin can make the skin more prone to bleeding from minor cuts or injuries.
Patients should use an electric razor when shaving to reduce the risk of nicking themselves and causing bleeding. They should also use a soft toothbrush and avoid flossing if it causes bleeding. They should wear gloves when handling sharp objects or working in the garden.
Choice B and E are wrong because:
• Take aspirin for pain relief.
Aspirin is a medication that also prevents blood clots by inhibiting platelets, which are cells that stick together to form clots. Taking aspirin with warfarin can increase the risk of bleeding significantly and is not recommended unless prescribed by a doctor for a specific reason. Patients should avoid taking aspirin or other nonsteroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen or naproxen, for pain relief unless advised by their doctor. They should also check the labels of any over-the-counter medications or supplements they use and avoid those that contain aspirin or NSAIDs.
• Wear shoes that fit well and avoid tight clothing.
This instruction is not related to warfarin therapy and does not affect its efficacy or safety.
However, it may be a general advice for patients with DVT to prevent further complications or discomfort. Wearing shoes that fit well and avoiding tight clothing can help improve blood circulation in the legs and prevent swelling or pain. Patients with DVT should also elevate their legs when possible and wear compression stockings if prescribed by their doctor.
A patient has been prescribed rivaroxaban (Xarelto) for deep vein thrombosis (DVT). Which statement by the patient indicates understanding of medication teaching?
A. “I will take aspirin if I get a headache.”
Choice A is wrong because aspirin is also an antiplatelet drug that can further increase the risk of bleeding when taken with rivaroxaban. The patient should not take aspirin or any other nonsteroidal anti-inflammatory drugs (NSAIDs) without consulting the prescriber.
B. “I will avoid activities that may cause injury.”
This statement indicates that the patient understands that rivaroxaban (Xarelto) is an anticoagulant that can increase the risk of bleeding and bruising. The patient should avoid activities that may cause injury, such as contact sports, sharp objects, or falls.
C. “I will take my medication with food.”
Choice C is wrong because rivaroxaban can be taken with or without food. The patient does not need to take the medication with food to prevent stomach upset or absorption problems.
D. “I will stop taking my medication if I feel better.”.
Choice D is wrong because rivaroxaban should be taken as prescribed and not stopped abruptly without consulting the prescriber. Stopping the medication can increase the risk of blood clots and stroke. The patient should not stop taking the medication even if they feel better or have no symptoms.
Full Explanation
This statement indicates that the patient understands that rivaroxaban (Xarelto) is an anticoagulant that can increase the risk of bleeding and bruising. The patient should avoid activities that may cause injury, such as contact sports, sharp objects, or falls.
Choice A is wrong because aspirin is also an antiplatelet drug that can further increase the risk of bleeding when taken with rivaroxaban. The patient should not take aspirin or any other nonsteroidal anti-inflammatory drugs (NSAIDs) without consulting the prescriber.
Choice C is wrong because rivaroxaban can be taken with or without food. The patient does not need to take the medication with food to prevent stomach upset or absorption problems.
Choice D is wrong because rivaroxaban should be taken as prescribed and not stopped abruptly without consulting the prescriber. Stopping the medication can increase the risk of blood clots and stroke. The patient should not stop taking the medication even if they feel better or have no symptoms.