NCLEX-RN Pharmacology Hematologic
System Exam |
20 Original ATI & NGN-Style Practice
Questions with Detailed Rationales
Question 1
Clinical Scenario
A 65-year-old male is admitted with a deep vein thrombosis (DVT)
and is receiving a continuous intravenous infusion of unfractionated
heparin. The baseline activated partial thromboplastin time (aPTT)
was 30 seconds. The nurse reviews the morning laboratory results
and notes the current aPTT is 90 seconds. The client has no signs of
active bleeding.
Question Stem
Which action should the nurse take first?
A. Continue the infusion at the current rate.
B. Stop the infusion permanently and notify the health care provider.
C. Administer intravenous vitamin K immediately.
D. Hold the infusion for 60 minutes and decrease the rate per the
facility's heparin protocol.
,Correct Answer
D. Hold the infusion for 60 minutes and decrease the rate per the
facility's heparin protocol.
Detailed Rationale
The therapeutic range for aPTT in a patient receiving unfractionated
heparin is typically 1.5 to 2.5 times the control value (45 to 75
seconds for a control of 30 seconds). An aPTT of 90 seconds is
supratherapeutic, placing the client at an increased risk for
bleeding. The standard, evidence-based nursing action for a
supratherapeutic aPTT without active bleeding is to temporarily hold
the infusion (usually for 30 to 60 minutes) and then restart it at a
decreased rate according to the facility's standardized heparin
nomogram. Option A is unsafe because continuing the current rate
will further elevate the aPTT and bleeding risk. Option B is incorrect
because permanent discontinuation is not indicated unless there is
life-threatening bleeding or a diagnosis of heparin-induced
thrombocytopenia (HIT). Option C is incorrect because vitamin K is
the reversal agent for warfarin, not heparin; protamine sulfate is the
reversal agent for heparin, but it is reserved for severe, life-
threatening bleeding, not asymptomatic lab elevations.
Learning Objective
Interpret aPTT laboratory values in the context of unfractionated
heparin therapy.
Prioritize nursing interventions for supratherapeutic anticoagulation
without active bleeding.
Differentiate between reversal agents for various anticoagulant
medications.
,Medication Safety Focus
High-alert medication / Monitoring parameters
Question 2
Clinical Scenario
A 58-year-old female is being discharged with a new prescription for
warfarin following a diagnosis of atrial fibrillation. The nurse is
providing dietary education to the client regarding her new
medication regimen.
Question Stem
Which statement by the client indicates understanding of the
teaching?
A. "I will increase my daily intake of spinach and kale to improve my
health."
B. "I will maintain a consistent, moderate intake of green leafy
vegetables."
C. "I will take my warfarin tablet with a full glass of milk every
morning."
D. "I will stop taking my daily multivitamin entirely to avoid
interactions."
Correct Answer
B. "I will maintain a consistent, moderate intake of green leafy
vegetables."
Detailed Rationale
Warfarin is a vitamin K antagonist. Green leafy vegetables (e.g.,
spinach, kale, broccoli) are high in vitamin K, which directly
, counteracts the therapeutic effect of warfarin, leading to a
subtherapeutic INR and increased clotting risk. The goal of patient
teaching is not to eliminate vitamin K from the diet, but to maintain a
consistent daily intake so the warfarin dose can be accurately
adjusted to match the patient's baseline diet. Option A is incorrect
because suddenly increasing vitamin K intake will decrease
warfarin's efficacy. Option C is incorrect because while taking
warfarin with food can reduce GI upset, dairy products do not
specifically enhance warfarin therapy, and consistency in
administration timing is more critical. Option D is incorrect because
a standard multivitamin can be continued as long as its vitamin K
content is consistent and accounted for in the overall dietary plan;
abrupt cessation is unnecessary and may alter the INR
unexpectedly.
Learning Objective
Explain the pharmacodynamic relationship between warfarin and
vitamin K.
Educate patients on appropriate dietary modifications while taking
oral anticoagulants.
Recognize the importance of consistency in diet and medication
administration timing.
Medication Safety Focus
Patient education / Drug-food interaction
Question 3
System Exam |
20 Original ATI & NGN-Style Practice
Questions with Detailed Rationales
Question 1
Clinical Scenario
A 65-year-old male is admitted with a deep vein thrombosis (DVT)
and is receiving a continuous intravenous infusion of unfractionated
heparin. The baseline activated partial thromboplastin time (aPTT)
was 30 seconds. The nurse reviews the morning laboratory results
and notes the current aPTT is 90 seconds. The client has no signs of
active bleeding.
Question Stem
Which action should the nurse take first?
A. Continue the infusion at the current rate.
B. Stop the infusion permanently and notify the health care provider.
C. Administer intravenous vitamin K immediately.
D. Hold the infusion for 60 minutes and decrease the rate per the
facility's heparin protocol.
,Correct Answer
D. Hold the infusion for 60 minutes and decrease the rate per the
facility's heparin protocol.
Detailed Rationale
The therapeutic range for aPTT in a patient receiving unfractionated
heparin is typically 1.5 to 2.5 times the control value (45 to 75
seconds for a control of 30 seconds). An aPTT of 90 seconds is
supratherapeutic, placing the client at an increased risk for
bleeding. The standard, evidence-based nursing action for a
supratherapeutic aPTT without active bleeding is to temporarily hold
the infusion (usually for 30 to 60 minutes) and then restart it at a
decreased rate according to the facility's standardized heparin
nomogram. Option A is unsafe because continuing the current rate
will further elevate the aPTT and bleeding risk. Option B is incorrect
because permanent discontinuation is not indicated unless there is
life-threatening bleeding or a diagnosis of heparin-induced
thrombocytopenia (HIT). Option C is incorrect because vitamin K is
the reversal agent for warfarin, not heparin; protamine sulfate is the
reversal agent for heparin, but it is reserved for severe, life-
threatening bleeding, not asymptomatic lab elevations.
Learning Objective
Interpret aPTT laboratory values in the context of unfractionated
heparin therapy.
Prioritize nursing interventions for supratherapeutic anticoagulation
without active bleeding.
Differentiate between reversal agents for various anticoagulant
medications.
,Medication Safety Focus
High-alert medication / Monitoring parameters
Question 2
Clinical Scenario
A 58-year-old female is being discharged with a new prescription for
warfarin following a diagnosis of atrial fibrillation. The nurse is
providing dietary education to the client regarding her new
medication regimen.
Question Stem
Which statement by the client indicates understanding of the
teaching?
A. "I will increase my daily intake of spinach and kale to improve my
health."
B. "I will maintain a consistent, moderate intake of green leafy
vegetables."
C. "I will take my warfarin tablet with a full glass of milk every
morning."
D. "I will stop taking my daily multivitamin entirely to avoid
interactions."
Correct Answer
B. "I will maintain a consistent, moderate intake of green leafy
vegetables."
Detailed Rationale
Warfarin is a vitamin K antagonist. Green leafy vegetables (e.g.,
spinach, kale, broccoli) are high in vitamin K, which directly
, counteracts the therapeutic effect of warfarin, leading to a
subtherapeutic INR and increased clotting risk. The goal of patient
teaching is not to eliminate vitamin K from the diet, but to maintain a
consistent daily intake so the warfarin dose can be accurately
adjusted to match the patient's baseline diet. Option A is incorrect
because suddenly increasing vitamin K intake will decrease
warfarin's efficacy. Option C is incorrect because while taking
warfarin with food can reduce GI upset, dairy products do not
specifically enhance warfarin therapy, and consistency in
administration timing is more critical. Option D is incorrect because
a standard multivitamin can be continued as long as its vitamin K
content is consistent and accounted for in the overall dietary plan;
abrupt cessation is unnecessary and may alter the INR
unexpectedly.
Learning Objective
Explain the pharmacodynamic relationship between warfarin and
vitamin K.
Educate patients on appropriate dietary modifications while taking
oral anticoagulants.
Recognize the importance of consistency in diet and medication
administration timing.
Medication Safety Focus
Patient education / Drug-food interaction
Question 3
