NCLEX-RN Hematologic System
Pharmacology Practice Questions |
5 Original ATI & NGN-Style MCQs with
Detailed Rationales
Question 1
Clinical Scenario
A 65-year-old male is admitted to the medical-surgical unit with a
deep vein thrombosis (DVT) in his left lower extremity. He is started
on a continuous intravenous heparin infusion. The baseline
activated partial thromboplastin time (aPTT) was 30 seconds. After 6
hours, the nurse reviews the laboratory results and notes the aPTT is
92 seconds. The client has no signs of active bleeding.
Question Stem
Which action should the nurse take first?
A. Increase the heparin infusion rate by 2 units/kg/hr.
B. Administer 10 mg of intravenous phytonadione (Vitamin K).
C. Pause the heparin infusion and notify the healthcare provider per
protocol.
,D. Continue the current infusion rate and recheck the aPTT in 6
hours.
Correct Answer
Correct Answer: C. Pause the heparin infusion and notify the
healthcare provider per protocol.
Detailed Rationale
The therapeutic range for aPTT in a client receiving heparin is
typically 1.5 to 2 times the control value (approximately 45–70
seconds, depending on the laboratory). An aPTT of 92 seconds is
significantly elevated, indicating a high risk for bleeding
complications. The priority nursing action is to pause the heparin
infusion to prevent hemorrhage and immediately notify the
healthcare provider or follow the institution's high-alert medication
protocol for supratherapeutic aPTT levels. Increasing the infusion
rate (Option A) would further elevate the aPTT and exacerbate
bleeding risk. Administering phytonadione (Option B) is incorrect
because Vitamin K is the antidote for warfarin, not heparin;
protamine sulfate is the antidote for heparin. Continuing the current
rate (Option D) ignores the critical laboratory finding and jeopardizes
patient safety. The nurse must also assess the client for any subtle
signs of bleeding, such as gum bleeding, hematuria, or changes in
neurological status, while awaiting further provider instructions.
Learning Objective
Interpret aPTT laboratory values in the context of heparin therapy.
Prioritize nursing interventions for supratherapeutic anticoagulation
levels.
,Identify the correct antidote for heparin-induced bleeding.
Medication Safety Focus
High-alert medication monitoring and protocol-driven intervention.
Question 2
Clinical Scenario
A 55-year-old female is being discharged home after being
diagnosed with atrial fibrillation. She is prescribed warfarin 5 mg
orally once daily. The nurse is providing discharge education
regarding dietary modifications and medication safety.
Question Stem
Which statement by the client indicates an understanding of the
teaching?
A. "I will keep my intake of green leafy vegetables consistent from
day to day."
B. "I should take an over-the-counter ibuprofen if I develop a
headache."
C. "I will stop taking my warfarin immediately if I notice my gums
bleeding slightly."
D. "I can safely drink two glasses of red wine each evening to help
me relax."
Correct Answer
Correct Answer: A. "I will keep my intake of green leafy vegetables
consistent from day to day."
, Detailed Rationale
Warfarin is a vitamin K antagonist. Green leafy vegetables (e.g.,
spinach, kale, broccoli) are high in vitamin K, which promotes
clotting and directly antagonizes warfarin's therapeutic effect.
Clients do not need to avoid these foods entirely, but they must keep
their vitamin K intake consistent to maintain a stable international
normalized ratio (INR). Option B is incorrect because nonsteroidal
anti-inflammatory drugs (NSAIDs) like ibuprofen increase the risk of
gastrointestinal bleeding and should be avoided; acetaminophen is
the preferred analgesic. Option C is incorrect because clients
should never abruptly stop warfarin without provider guidance, as
this increases the risk of thromboembolic events; minor bleeding
should be reported, but the medication is not stopped
independently. Option D is incorrect because alcohol can interfere
with warfarin metabolism and increase bleeding risk, and intake
should be strictly limited or avoided.
Learning Objective
Educate patients on dietary consistency while taking warfarin.
Recognize medication interactions that increase bleeding risk with
warfarin.
Instruct patients on appropriate actions for minor adverse effects
versus when to seek emergency care.
Medication Safety Focus
Patient education and drug-food interaction management.
Question 3
Pharmacology Practice Questions |
5 Original ATI & NGN-Style MCQs with
Detailed Rationales
Question 1
Clinical Scenario
A 65-year-old male is admitted to the medical-surgical unit with a
deep vein thrombosis (DVT) in his left lower extremity. He is started
on a continuous intravenous heparin infusion. The baseline
activated partial thromboplastin time (aPTT) was 30 seconds. After 6
hours, the nurse reviews the laboratory results and notes the aPTT is
92 seconds. The client has no signs of active bleeding.
Question Stem
Which action should the nurse take first?
A. Increase the heparin infusion rate by 2 units/kg/hr.
B. Administer 10 mg of intravenous phytonadione (Vitamin K).
C. Pause the heparin infusion and notify the healthcare provider per
protocol.
,D. Continue the current infusion rate and recheck the aPTT in 6
hours.
Correct Answer
Correct Answer: C. Pause the heparin infusion and notify the
healthcare provider per protocol.
Detailed Rationale
The therapeutic range for aPTT in a client receiving heparin is
typically 1.5 to 2 times the control value (approximately 45–70
seconds, depending on the laboratory). An aPTT of 92 seconds is
significantly elevated, indicating a high risk for bleeding
complications. The priority nursing action is to pause the heparin
infusion to prevent hemorrhage and immediately notify the
healthcare provider or follow the institution's high-alert medication
protocol for supratherapeutic aPTT levels. Increasing the infusion
rate (Option A) would further elevate the aPTT and exacerbate
bleeding risk. Administering phytonadione (Option B) is incorrect
because Vitamin K is the antidote for warfarin, not heparin;
protamine sulfate is the antidote for heparin. Continuing the current
rate (Option D) ignores the critical laboratory finding and jeopardizes
patient safety. The nurse must also assess the client for any subtle
signs of bleeding, such as gum bleeding, hematuria, or changes in
neurological status, while awaiting further provider instructions.
Learning Objective
Interpret aPTT laboratory values in the context of heparin therapy.
Prioritize nursing interventions for supratherapeutic anticoagulation
levels.
,Identify the correct antidote for heparin-induced bleeding.
Medication Safety Focus
High-alert medication monitoring and protocol-driven intervention.
Question 2
Clinical Scenario
A 55-year-old female is being discharged home after being
diagnosed with atrial fibrillation. She is prescribed warfarin 5 mg
orally once daily. The nurse is providing discharge education
regarding dietary modifications and medication safety.
Question Stem
Which statement by the client indicates an understanding of the
teaching?
A. "I will keep my intake of green leafy vegetables consistent from
day to day."
B. "I should take an over-the-counter ibuprofen if I develop a
headache."
C. "I will stop taking my warfarin immediately if I notice my gums
bleeding slightly."
D. "I can safely drink two glasses of red wine each evening to help
me relax."
Correct Answer
Correct Answer: A. "I will keep my intake of green leafy vegetables
consistent from day to day."
, Detailed Rationale
Warfarin is a vitamin K antagonist. Green leafy vegetables (e.g.,
spinach, kale, broccoli) are high in vitamin K, which promotes
clotting and directly antagonizes warfarin's therapeutic effect.
Clients do not need to avoid these foods entirely, but they must keep
their vitamin K intake consistent to maintain a stable international
normalized ratio (INR). Option B is incorrect because nonsteroidal
anti-inflammatory drugs (NSAIDs) like ibuprofen increase the risk of
gastrointestinal bleeding and should be avoided; acetaminophen is
the preferred analgesic. Option C is incorrect because clients
should never abruptly stop warfarin without provider guidance, as
this increases the risk of thromboembolic events; minor bleeding
should be reported, but the medication is not stopped
independently. Option D is incorrect because alcohol can interfere
with warfarin metabolism and increase bleeding risk, and intake
should be strictly limited or avoided.
Learning Objective
Educate patients on dietary consistency while taking warfarin.
Recognize medication interactions that increase bleeding risk with
warfarin.
Instruct patients on appropriate actions for minor adverse effects
versus when to seek emergency care.
Medication Safety Focus
Patient education and drug-food interaction management.
Question 3
