NCLEX-RN Pharmacology Hematologic
System Practice Questions |
20 ATI & NGN-Style MCQs with Rationales |
Nursing Exam Study Guide
Question 1
Clinical Scenario
A 68-year-old male client is being discharged with a new
prescription for warfarin 5 mg by mouth daily for the treatment of
deep vein thrombosis. The client has a history of hypertension and
type 2 diabetes mellitus. During the discharge teaching session, the
nurse evaluates the client's understanding of dietary modifications
and medication safety.
Question Stem
Which statement by the client indicates a correct understanding of
the dietary teaching related to warfarin therapy?
A. "I will completely avoid eating green leafy vegetables like spinach
and kale." B. "I should maintain a consistent weekly intake of foods
containing vitamin K." C. "I need to increase my daily consumption
of vitamin K-rich foods to prevent bleeding." D. "I will only eat foods
high in vitamin K on the days I have my INR drawn."
,Correct Answer
Correct Answer: B. "I should maintain a consistent weekly intake of
foods containing vitamin K."
Detailed Rationale
The correct answer is B. Warfarin is a vitamin K antagonist
anticoagulant. Vitamin K promotes the hepatic synthesis of clotting
factors (II, VII, IX, X), which directly counteracts the therapeutic
effect of warfarin. Clients do not need to completely avoid vitamin K;
rather, they must maintain a consistent daily or weekly intake of
vitamin K-rich foods. Sudden increases in vitamin K can decrease
the INR and increase the risk of thrombosis, while sudden
decreases can increase the INR and the risk of bleeding.
Option A is incorrect because complete avoidance of vitamin K is
unnecessary and can lead to nutritional deficiencies; consistency is
the key principle. Option C is incorrect because increasing vitamin K
intake will antagonize warfarin, lowering the INR and increasing the
risk for clot formation. Option D is incorrect because varying vitamin
K intake based on lab draws will cause dangerous fluctuations in the
INR, making anticoagulation unstable and unsafe.
Nursing considerations include educating the client to keep a food
diary if needed, reporting any signs of bleeding or clotting, and
consulting a dietitian. Medication safety focuses on preventing
fluctuations in anticoagulation status through consistent dietary
habits. Monitoring requires regular INR checks, with a typical
therapeutic goal of 2.0 to 3.0 for DVT.
Learning Objective
,After completing this question, the learner should be able to: •
Explain the mechanism of action of warfarin as a vitamin K
antagonist. • Educate patients on the importance of consistent
vitamin K intake rather than avoidance. • Identify the therapeutic
INR range for deep vein thrombosis treatment.
Medication Safety Focus
Patient education
Question 2
Clinical Scenario
A 55-year-old female client is admitted to the medical-surgical unit
with a pulmonary embolism. The healthcare provider prescribes a
continuous intravenous infusion of unfractionated heparin. The
client's baseline activated partial thromboplastin time (aPTT) is 32
seconds. After 24 hours of therapy, the nurse reviews the latest
laboratory results, which show an aPTT of 110 seconds. The control
value is 30 seconds. The client's vital signs are: blood pressure
110/68 mm Hg, heart rate 88/min, respiratory rate 18/min, and
temperature 37.0° C (98.6° F). The client reports no active bleeding.
Question Stem
Based on the laboratory findings, which action should the nurse
take first?
A. Administer protamine sulfate as prescribed. B. Increase the
heparin infusion rate by 2 units/kg/hr. C. Stop the heparin infusion
and notify the healthcare provider. D. Continue the heparin infusion
at the current rate and recheck the aPTT in 6 hours.
, Correct Answer
Correct Answer: C. Stop the heparin infusion and notify the
healthcare provider.
Detailed Rationale
The correct answer is C. The therapeutic aPTT for a client receiving
unfractionated heparin is typically 1.5 to 2.5 times the control value.
With a control of 30 seconds, the therapeutic range is 45 to 75
seconds. The client's aPTT of 110 seconds is significantly elevated
(more than 3.5 times the control), placing the client at a high risk for
severe hemorrhage, even in the absence of active bleeding. The
priority nursing action is to stop the heparin infusion immediately to
prevent further anticoagulation and notify the provider for further
orders, which may include holding the dose or administering a
reversal agent if bleeding occurs.
Option A is incorrect because protamine sulfate is the antidote for
heparin, but it is typically reserved for severe, life-threatening
bleeding or massive overdose. The first step for an asymptomatic
supratherapeutic aPTT is to simply stop the infusion. Option B is
incorrect because increasing the rate would further elevate the aPTT
and exacerbate the bleeding risk. Option D is incorrect because
continuing the infusion at the current rate when the aPTT is critically
high is unsafe and violates heparin nomogram protocols.
Clinical reasoning dictates that any aPTT significantly above the
therapeutic range requires immediate cessation of the drug. Nursing
assessment must continuously monitor for overt or covert signs of
bleeding, such as hematuria, melena, or neurological changes.
System Practice Questions |
20 ATI & NGN-Style MCQs with Rationales |
Nursing Exam Study Guide
Question 1
Clinical Scenario
A 68-year-old male client is being discharged with a new
prescription for warfarin 5 mg by mouth daily for the treatment of
deep vein thrombosis. The client has a history of hypertension and
type 2 diabetes mellitus. During the discharge teaching session, the
nurse evaluates the client's understanding of dietary modifications
and medication safety.
Question Stem
Which statement by the client indicates a correct understanding of
the dietary teaching related to warfarin therapy?
A. "I will completely avoid eating green leafy vegetables like spinach
and kale." B. "I should maintain a consistent weekly intake of foods
containing vitamin K." C. "I need to increase my daily consumption
of vitamin K-rich foods to prevent bleeding." D. "I will only eat foods
high in vitamin K on the days I have my INR drawn."
,Correct Answer
Correct Answer: B. "I should maintain a consistent weekly intake of
foods containing vitamin K."
Detailed Rationale
The correct answer is B. Warfarin is a vitamin K antagonist
anticoagulant. Vitamin K promotes the hepatic synthesis of clotting
factors (II, VII, IX, X), which directly counteracts the therapeutic
effect of warfarin. Clients do not need to completely avoid vitamin K;
rather, they must maintain a consistent daily or weekly intake of
vitamin K-rich foods. Sudden increases in vitamin K can decrease
the INR and increase the risk of thrombosis, while sudden
decreases can increase the INR and the risk of bleeding.
Option A is incorrect because complete avoidance of vitamin K is
unnecessary and can lead to nutritional deficiencies; consistency is
the key principle. Option C is incorrect because increasing vitamin K
intake will antagonize warfarin, lowering the INR and increasing the
risk for clot formation. Option D is incorrect because varying vitamin
K intake based on lab draws will cause dangerous fluctuations in the
INR, making anticoagulation unstable and unsafe.
Nursing considerations include educating the client to keep a food
diary if needed, reporting any signs of bleeding or clotting, and
consulting a dietitian. Medication safety focuses on preventing
fluctuations in anticoagulation status through consistent dietary
habits. Monitoring requires regular INR checks, with a typical
therapeutic goal of 2.0 to 3.0 for DVT.
Learning Objective
,After completing this question, the learner should be able to: •
Explain the mechanism of action of warfarin as a vitamin K
antagonist. • Educate patients on the importance of consistent
vitamin K intake rather than avoidance. • Identify the therapeutic
INR range for deep vein thrombosis treatment.
Medication Safety Focus
Patient education
Question 2
Clinical Scenario
A 55-year-old female client is admitted to the medical-surgical unit
with a pulmonary embolism. The healthcare provider prescribes a
continuous intravenous infusion of unfractionated heparin. The
client's baseline activated partial thromboplastin time (aPTT) is 32
seconds. After 24 hours of therapy, the nurse reviews the latest
laboratory results, which show an aPTT of 110 seconds. The control
value is 30 seconds. The client's vital signs are: blood pressure
110/68 mm Hg, heart rate 88/min, respiratory rate 18/min, and
temperature 37.0° C (98.6° F). The client reports no active bleeding.
Question Stem
Based on the laboratory findings, which action should the nurse
take first?
A. Administer protamine sulfate as prescribed. B. Increase the
heparin infusion rate by 2 units/kg/hr. C. Stop the heparin infusion
and notify the healthcare provider. D. Continue the heparin infusion
at the current rate and recheck the aPTT in 6 hours.
, Correct Answer
Correct Answer: C. Stop the heparin infusion and notify the
healthcare provider.
Detailed Rationale
The correct answer is C. The therapeutic aPTT for a client receiving
unfractionated heparin is typically 1.5 to 2.5 times the control value.
With a control of 30 seconds, the therapeutic range is 45 to 75
seconds. The client's aPTT of 110 seconds is significantly elevated
(more than 3.5 times the control), placing the client at a high risk for
severe hemorrhage, even in the absence of active bleeding. The
priority nursing action is to stop the heparin infusion immediately to
prevent further anticoagulation and notify the provider for further
orders, which may include holding the dose or administering a
reversal agent if bleeding occurs.
Option A is incorrect because protamine sulfate is the antidote for
heparin, but it is typically reserved for severe, life-threatening
bleeding or massive overdose. The first step for an asymptomatic
supratherapeutic aPTT is to simply stop the infusion. Option B is
incorrect because increasing the rate would further elevate the aPTT
and exacerbate the bleeding risk. Option D is incorrect because
continuing the infusion at the current rate when the aPTT is critically
high is unsafe and violates heparin nomogram protocols.
Clinical reasoning dictates that any aPTT significantly above the
therapeutic range requires immediate cessation of the drug. Nursing
assessment must continuously monitor for overt or covert signs of
bleeding, such as hematuria, melena, or neurological changes.
