NCLEX-RN Pharmacology Made Easy Exam Questions &
Answers | Hematologic System | 15 Original ATI & NGN-
Style Practice Questions with Detailed Rationales |
Anticoagulants, Antiplatelets, Thrombolytics, Iron
Therapy & Hematopoietic Agents | Nursing Exam Prep
Study Guide
Question 1
Clinical Scenario
A 72-year-old male client is admitted to the medical-surgical
unit with a deep vein thrombosis (DVT) in his left lower
extremity. The healthcare provider prescribes a continuous
intravenous infusion of unfractionated heparin. The client's
baseline aPTT is 32 seconds, and the therapeutic goal is 1.5 to
2.5 times the baseline. Six hours after initiating the infusion, the
client's aPTT is reported as 88 seconds.
Question Stem
Which action should the nurse take based on this laboratory
finding?
,A. Increase the heparin infusion rate as prescribed.
B. Document the result as expected and continue monitoring.
C. Administer vitamin K as a reversal agent.
D. Prepare to administer protamine sulfate.
Correct Answer: B. Document the result as expected and
continue monitoring.
Detailed Rationale
The correct answer is B. The therapeutic aPTT goal for a client
on unfractionated heparin is typically 1.5 to 2.5 times the
baseline value. With a baseline aPTT of 32 seconds, the target
range is 48 to 80 seconds . An aPTT of 88 seconds is just slightly
above this target. While it is at the upper end of the therapeutic
range, it does not require an immediate dose adjustment or
reversal. The nurse should document this finding and continue
to monitor the client for signs of bleeding as per protocol.
Option A is incorrect. Increasing the infusion rate would raise
the aPTT even further, placing the client at an increased risk for
bleeding complications such as hemorrhage.
Option C is incorrect. Vitamin K is the specific antidote for
warfarin (Coumadin) toxicity, not heparin. It works by reversing
,the effects of vitamin K antagonism to restore the production of
clotting factors.
Option D is incorrect. Protamine sulfate is the antidote for
heparin. It is indicated in cases of significant or life-threatening
bleeding due to heparin overdose. At 88 seconds, the aPTT is
not critically elevated enough to require the administration of a
reversal agent. Furthermore, administering protamine sulfate
carries its own risks, including hypotension and anaphylaxis.
Clinical Reasoning: The priority is to assess the laboratory value
against the established therapeutic goal. Recognizing the target
range is key to preventing both thrombotic events (from
subtherapeutic levels) and bleeding complications (from
supratherapeutic levels). The nurse must apply critical thinking
to differentiate between a result requiring close monitoring and
one that necessitates an immediate, high-alert intervention.
Learning Objective
After completing this question, the learner should be able to:
• Identify the therapeutic aPTT goal for a client receiving
unfractionated heparin.
• Distinguish between heparin and warfarin toxicity
management.
, • Interpret laboratory values to guide safe medication
administration and monitoring.
Medication Safety Focus
High-alert medication; Laboratory monitoring.
Question 2
Clinical Scenario
A 65-year-old female client is prescribed warfarin (Coumadin)
for chronic atrial fibrillation. She has a history of hypertension
and osteoarthritis. During a routine follow-up visit, the client
tells the nurse, "I've been taking my new glucosamine
supplement for my joints, and I also started a low-carb diet, so
I'm eating a lot more leafy green salads."
Question Stem
Which response by the nurse is most appropriate?
A. "It's good that you're eating more greens; they are a great
source of vitamin K."
B. "You should stop taking the glucosamine and avoid leafy
green vegetables while on warfarin."
C. "The glucosamine and the change in your diet can affect your
warfarin and require closer monitoring."
Answers | Hematologic System | 15 Original ATI & NGN-
Style Practice Questions with Detailed Rationales |
Anticoagulants, Antiplatelets, Thrombolytics, Iron
Therapy & Hematopoietic Agents | Nursing Exam Prep
Study Guide
Question 1
Clinical Scenario
A 72-year-old male client is admitted to the medical-surgical
unit with a deep vein thrombosis (DVT) in his left lower
extremity. The healthcare provider prescribes a continuous
intravenous infusion of unfractionated heparin. The client's
baseline aPTT is 32 seconds, and the therapeutic goal is 1.5 to
2.5 times the baseline. Six hours after initiating the infusion, the
client's aPTT is reported as 88 seconds.
Question Stem
Which action should the nurse take based on this laboratory
finding?
,A. Increase the heparin infusion rate as prescribed.
B. Document the result as expected and continue monitoring.
C. Administer vitamin K as a reversal agent.
D. Prepare to administer protamine sulfate.
Correct Answer: B. Document the result as expected and
continue monitoring.
Detailed Rationale
The correct answer is B. The therapeutic aPTT goal for a client
on unfractionated heparin is typically 1.5 to 2.5 times the
baseline value. With a baseline aPTT of 32 seconds, the target
range is 48 to 80 seconds . An aPTT of 88 seconds is just slightly
above this target. While it is at the upper end of the therapeutic
range, it does not require an immediate dose adjustment or
reversal. The nurse should document this finding and continue
to monitor the client for signs of bleeding as per protocol.
Option A is incorrect. Increasing the infusion rate would raise
the aPTT even further, placing the client at an increased risk for
bleeding complications such as hemorrhage.
Option C is incorrect. Vitamin K is the specific antidote for
warfarin (Coumadin) toxicity, not heparin. It works by reversing
,the effects of vitamin K antagonism to restore the production of
clotting factors.
Option D is incorrect. Protamine sulfate is the antidote for
heparin. It is indicated in cases of significant or life-threatening
bleeding due to heparin overdose. At 88 seconds, the aPTT is
not critically elevated enough to require the administration of a
reversal agent. Furthermore, administering protamine sulfate
carries its own risks, including hypotension and anaphylaxis.
Clinical Reasoning: The priority is to assess the laboratory value
against the established therapeutic goal. Recognizing the target
range is key to preventing both thrombotic events (from
subtherapeutic levels) and bleeding complications (from
supratherapeutic levels). The nurse must apply critical thinking
to differentiate between a result requiring close monitoring and
one that necessitates an immediate, high-alert intervention.
Learning Objective
After completing this question, the learner should be able to:
• Identify the therapeutic aPTT goal for a client receiving
unfractionated heparin.
• Distinguish between heparin and warfarin toxicity
management.
, • Interpret laboratory values to guide safe medication
administration and monitoring.
Medication Safety Focus
High-alert medication; Laboratory monitoring.
Question 2
Clinical Scenario
A 65-year-old female client is prescribed warfarin (Coumadin)
for chronic atrial fibrillation. She has a history of hypertension
and osteoarthritis. During a routine follow-up visit, the client
tells the nurse, "I've been taking my new glucosamine
supplement for my joints, and I also started a low-carb diet, so
I'm eating a lot more leafy green salads."
Question Stem
Which response by the nurse is most appropriate?
A. "It's good that you're eating more greens; they are a great
source of vitamin K."
B. "You should stop taking the glucosamine and avoid leafy
green vegetables while on warfarin."
C. "The glucosamine and the change in your diet can affect your
warfarin and require closer monitoring."
