NR 511 / NR511 Differential Diagnosis Primary Care
Review Midterm Exam Actual 2026/2027 with Detailed
Rationales | 100% Verified | Pass Guaranteed – A+
Graded
SECTION 1: Clinical Decision-Making & Diagnostic Reasoning
(Questions 1–14)
Q1: A nurse practitioner is evaluating a 45-year-old patient who presents with fatigue,
weight loss, and night sweats. Which diagnostic reasoning approach is most
appropriate for organizing the differential diagnosis?
A. Starting with the most common diagnosis and working downward
B. Using a pathophysiologic framework to generate a comprehensive differential that
includes infectious, inflammatory, neoplastic, and endocrine causes
C. Ordering a complete metabolic panel and imaging before formulating a
differential
D. Focusing exclusively on the patient's stated concern without considering
associated symptoms
Correct Answer: B
Rationale: A systematic pathophysiologic framework ensures a comprehensive
differential diagnosis by categorizing potential causes into major pathophysiologic
categories, preventing premature closure and diagnostic error.
,Q2: A patient presents with chest pain. The nurse practitioner uses the HEARTS
framework to guide the differential diagnosis. Which component of this framework
addresses whether the pain changes with position, inspiration, or palpation?
A. History
B. ECG
C. Auscultation
D. Troponin
Correct Answer: A
Rationale: The HEARTS framework includes History, ECG, Age, Risk factors, Troponin,
and Sex; the history component specifically evaluates pain characteristics including
positional, inspiratory, and palpation-related changes that suggest non-cardiac
etiologies.
Q3: A 62-year-old patient with hypertension and diabetes presents with acute-onset
chest pain. Which clinical decision rule is most appropriate for assessing the pre-test
probability of acute coronary syndrome?
A. HEART score
B. Wells criteria
C. CURB-65
D. Ottawa ankle rules
Correct Answer: A
,Rationale: The HEART score (History, ECG, Age, Risk factors, Troponin) is specifically
designed to assess the risk of major adverse cardiac events in patients presenting
with chest pain in the emergency department setting.
Q4: A nurse practitioner is considering test characteristics when ordering a
diagnostic test. Which term describes the proportion of patients with the disease
who have a positive test result?
A. Specificity
B. Positive predictive value
C. Sensitivity
D. Negative predictive value
Correct Answer: C
Rationale: Sensitivity is the proportion of true positive results among all patients who
have the disease, indicating the test's ability to correctly identify those with the
condition; high sensitivity is essential for screening tests.
Q5: A patient with a pre-test probability of 30% for pulmonary embolism has a
negative D-dimer test. Which concept best explains why the post-test probability is
significantly lower?
A. The test has high specificity
B. The test has high negative predictive value when pre-test probability is low to
intermediate
C. The test has low sensitivity
D. The test is not affected by pre-test probability
, Correct Answer: B
Rationale: D-dimer has high sensitivity but low specificity; its negative predictive
value is excellent when pre-test probability is low to intermediate, meaning a
negative test effectively rules out pulmonary embolism in these patients.
Q6: A nurse practitioner is using the Ottawa Ankle Rules to determine whether an
ankle X-ray is needed. Which finding would indicate the need for imaging?
A. Ability to bear weight for four steps immediately after injury and in the
examination room
B. Tenderness over the posterior edge or tip of the lateral malleolus
C. Pain isolated to the soft tissues without bony tenderness
D. Swelling without point tenderness
Correct Answer: B
Rationale: The Ottawa Ankle Rules indicate ankle X-ray is needed if there is bony
tenderness at the posterior edge or tip of either malleolus, or if the patient cannot
bear weight for four steps both immediately and during examination.
Q7: A patient presents with a sore throat. The nurse practitioner calculates a Centor
score of 3 (fever, tonsillar exudates, tender anterior cervical nodes, no cough). Which
management is most appropriate?
A. Start empiric amoxicillin without testing
B. Perform rapid strep testing or throat culture; treat if positive
C. Start azithromycin empirically
D. Reassure and recommend supportive care only
Review Midterm Exam Actual 2026/2027 with Detailed
Rationales | 100% Verified | Pass Guaranteed – A+
Graded
SECTION 1: Clinical Decision-Making & Diagnostic Reasoning
(Questions 1–14)
Q1: A nurse practitioner is evaluating a 45-year-old patient who presents with fatigue,
weight loss, and night sweats. Which diagnostic reasoning approach is most
appropriate for organizing the differential diagnosis?
A. Starting with the most common diagnosis and working downward
B. Using a pathophysiologic framework to generate a comprehensive differential that
includes infectious, inflammatory, neoplastic, and endocrine causes
C. Ordering a complete metabolic panel and imaging before formulating a
differential
D. Focusing exclusively on the patient's stated concern without considering
associated symptoms
Correct Answer: B
Rationale: A systematic pathophysiologic framework ensures a comprehensive
differential diagnosis by categorizing potential causes into major pathophysiologic
categories, preventing premature closure and diagnostic error.
,Q2: A patient presents with chest pain. The nurse practitioner uses the HEARTS
framework to guide the differential diagnosis. Which component of this framework
addresses whether the pain changes with position, inspiration, or palpation?
A. History
B. ECG
C. Auscultation
D. Troponin
Correct Answer: A
Rationale: The HEARTS framework includes History, ECG, Age, Risk factors, Troponin,
and Sex; the history component specifically evaluates pain characteristics including
positional, inspiratory, and palpation-related changes that suggest non-cardiac
etiologies.
Q3: A 62-year-old patient with hypertension and diabetes presents with acute-onset
chest pain. Which clinical decision rule is most appropriate for assessing the pre-test
probability of acute coronary syndrome?
A. HEART score
B. Wells criteria
C. CURB-65
D. Ottawa ankle rules
Correct Answer: A
,Rationale: The HEART score (History, ECG, Age, Risk factors, Troponin) is specifically
designed to assess the risk of major adverse cardiac events in patients presenting
with chest pain in the emergency department setting.
Q4: A nurse practitioner is considering test characteristics when ordering a
diagnostic test. Which term describes the proportion of patients with the disease
who have a positive test result?
A. Specificity
B. Positive predictive value
C. Sensitivity
D. Negative predictive value
Correct Answer: C
Rationale: Sensitivity is the proportion of true positive results among all patients who
have the disease, indicating the test's ability to correctly identify those with the
condition; high sensitivity is essential for screening tests.
Q5: A patient with a pre-test probability of 30% for pulmonary embolism has a
negative D-dimer test. Which concept best explains why the post-test probability is
significantly lower?
A. The test has high specificity
B. The test has high negative predictive value when pre-test probability is low to
intermediate
C. The test has low sensitivity
D. The test is not affected by pre-test probability
, Correct Answer: B
Rationale: D-dimer has high sensitivity but low specificity; its negative predictive
value is excellent when pre-test probability is low to intermediate, meaning a
negative test effectively rules out pulmonary embolism in these patients.
Q6: A nurse practitioner is using the Ottawa Ankle Rules to determine whether an
ankle X-ray is needed. Which finding would indicate the need for imaging?
A. Ability to bear weight for four steps immediately after injury and in the
examination room
B. Tenderness over the posterior edge or tip of the lateral malleolus
C. Pain isolated to the soft tissues without bony tenderness
D. Swelling without point tenderness
Correct Answer: B
Rationale: The Ottawa Ankle Rules indicate ankle X-ray is needed if there is bony
tenderness at the posterior edge or tip of either malleolus, or if the patient cannot
bear weight for four steps both immediately and during examination.
Q7: A patient presents with a sore throat. The nurse practitioner calculates a Centor
score of 3 (fever, tonsillar exudates, tender anterior cervical nodes, no cough). Which
management is most appropriate?
A. Start empiric amoxicillin without testing
B. Perform rapid strep testing or throat culture; treat if positive
C. Start azithromycin empirically
D. Reassure and recommend supportive care only
