1
NR571 Complex Diagnosis Acute Care Midterm Exam
2026/2027 Actual Exam - Complete Questions with
Detailed Rationales | 100% Verified Graded A+ Pass
Guaranteed - A+ Graded
Section 1: Clinical Reasoning & Diagnostic Decision-Making (Q1-12)
1. An Acute Care Nurse Practitioner (ACNP) is evaluating a 45-year-old male with low-risk
chest pain. The patient has a history of GERD. The ACNP applies the HEART score. Which
component of the HEART score is assessed subjectively?
A. History
B. ECG
C. Age
D. Risk factors
A. History [CORRECT]
The History component in the HEART score is considered subjective and slightly weighted,
requiring the clinician to determine if the history is highly suspicious, moderately suspicious, or
slightly suspicious. ECG, Age, and Risk factors are more objectively scored based on specific
criteria and numerical values.
Correct Answer: A
2. A 32-year-old female presents with pleuritic chest pain and tachycardia. The Wells score for
PE is calculated as 1.5 (moderate probability). The ACNP considers the PERC rule to rule out
pulmonary embolism. Which of the following criteria is part of the PERC rule?
A. Age > 50 years
B. Heart rate > 100 bpm
C. Oxygen saturation < 95%
D. Prior DVT or PE
B. Heart rate > 100 bpm [CORRECT]
,2
The PERC (Pulmonary Embolism Rule-out Criteria) rule includes 8 clinical criteria: Age < 50,
HR < 100, O2 sat > 94%, No unilateral leg swelling, No hemoptysis, No recent trauma or
surgery, No prior DVT/PE, and No hormone replacement therapy. If all criteria are negative, PE
can be ruled out without D-dimer in low-risk patients.
Correct Answer: B
3. A diagnostic test has a sensitivity of 95% and a specificity of 60% for a condition with a
prevalence of 20% in the acute care setting. The test returns positive for a patient. The ACNP
explains to the student that a high sensitivity ensures:
A. A high negative predictive value (NPV).
B. A high positive predictive value (PPV).
C. The test accurately identifies those without the disease.
D. The test is useful for ruling in the disease.
A. A high negative predictive value (NPV). [CORRECT]
Sensitivity (SNOUT) refers to the ability of a test to correctly identify those with the disease. A
highly sensitive test (SnNout) has a high Negative Predictive Value; if the test is negative, it
effectively rules out the disease. Specificity (SPIN) rules in disease.
Correct Answer: A
4. A 65-year-old patient presents with fever, dyspnea, and a new infiltrate on chest X-ray. To
determine the severity of Community-Acquired Pneumonia (CAP) and the appropriate site of
care (inpatient vs. outpatient), which clinical decision rule should the ACNP utilize?
A. CURB-65
B. CHA2DS2-VASc
C. Wells Criteria
D. Geneva Score
A. CURB-65 [CORRECT]
,3
CURB-65 (Confusion, Urea >19 mg/dL, Respiratory rate ≥30, Blood pressure <90/60, age ≥65)
is the recommended scoring system to assess mortality risk in CAP and guide admission
decisions. CHA2DS2-VASc is for stroke risk in AFib, Wells for DVT/PE, and Geneva for PE.
Correct Answer: A
5. When applying Bayesian reasoning to a patient with suspected pulmonary embolism, the
ACNP understands that the "pre-test probability" is most crucial for:
A. Determining the length of anticoagulation therapy.
B. Interpreting the results of a D-dimer assay.
C. Selecting the appropriate antibiotic regimen.
D. Deciding if the patient needs ICU admission.
B. Interpreting the results of a D-dimer assay. [CORRECT]
Bayesian reasoning states that the usefulness of a diagnostic test depends on the pre-test
probability. A D-dimer is most useful when the pre-test probability is low (negative D-dimer
rules out PE) or moderate; in high pre-test probability, a positive D-dimer adds little diagnostic
value as imaging is required regardless.
Correct Answer: B
6. A patient presents with acute abdominal pain. The ACNP orders a CT scan with contrast. The
radiology report notes a "Likelihood Ratio (LR+) of 12" for the finding of appendiceal
thickening regarding appendicitis. This indicates:
A. The finding is useful for ruling out appendicitis.
B. The finding significantly increases the probability of appendicitis.
C. The finding has no diagnostic value.
D. The test has poor sensitivity.
B. The finding significantly increases the probability of appendicitis. [CORRECT]
, 4
A Likelihood Ratio Positive (LR+) greater than 10 indicates a large and often conclusive increase
in the probability of the disease. An LR+ of 12 for appendiceal thickening strongly rules in the
diagnosis of appendicitis. An LR- < 0.1 would rule it out.
Correct Answer: B
7. The ACNP is reviewing a clinical practice guideline (CPG) for heart failure management.
Which level of evidence is considered the strongest in the hierarchy of evidence?
A. Expert opinion
B. Case-control studies
C. Randomized Controlled Trials (RCTs) and Meta-analyses
D. Cohort studies
C. Randomized Controlled Trials (RCTs) and Meta-analyses [CORRECT]
The hierarchy of evidence ranks systematic reviews and meta-analyses of RCTs at the top,
followed by individual RCTs. These provide the strongest evidence for causality and treatment
efficacy due to randomization and control of bias, unlike observational studies or expert opinion.
Correct Answer: C
8. A 55-year-old male presents with "tearing" chest pain radiating to the back. The ACNP must
rapidly differentiate between Aortic Dissection and Acute Coronary Syndrome (ACS). Which
"red flag" finding most strongly suggests Aortic Dissection?
A. ST-segment elevation in lead aVR
B. Pulse deficit between arms
C. Elevated Troponin I
D. Nausea and vomiting
B. Pulse deficit between arms [CORRECT]
A pulse deficit (difference in blood pressure or pulse strength between arms) is a classic and
highly specific sign of aortic dissection, particularly involving the subclavian artery. While aVR
NR571 Complex Diagnosis Acute Care Midterm Exam
2026/2027 Actual Exam - Complete Questions with
Detailed Rationales | 100% Verified Graded A+ Pass
Guaranteed - A+ Graded
Section 1: Clinical Reasoning & Diagnostic Decision-Making (Q1-12)
1. An Acute Care Nurse Practitioner (ACNP) is evaluating a 45-year-old male with low-risk
chest pain. The patient has a history of GERD. The ACNP applies the HEART score. Which
component of the HEART score is assessed subjectively?
A. History
B. ECG
C. Age
D. Risk factors
A. History [CORRECT]
The History component in the HEART score is considered subjective and slightly weighted,
requiring the clinician to determine if the history is highly suspicious, moderately suspicious, or
slightly suspicious. ECG, Age, and Risk factors are more objectively scored based on specific
criteria and numerical values.
Correct Answer: A
2. A 32-year-old female presents with pleuritic chest pain and tachycardia. The Wells score for
PE is calculated as 1.5 (moderate probability). The ACNP considers the PERC rule to rule out
pulmonary embolism. Which of the following criteria is part of the PERC rule?
A. Age > 50 years
B. Heart rate > 100 bpm
C. Oxygen saturation < 95%
D. Prior DVT or PE
B. Heart rate > 100 bpm [CORRECT]
,2
The PERC (Pulmonary Embolism Rule-out Criteria) rule includes 8 clinical criteria: Age < 50,
HR < 100, O2 sat > 94%, No unilateral leg swelling, No hemoptysis, No recent trauma or
surgery, No prior DVT/PE, and No hormone replacement therapy. If all criteria are negative, PE
can be ruled out without D-dimer in low-risk patients.
Correct Answer: B
3. A diagnostic test has a sensitivity of 95% and a specificity of 60% for a condition with a
prevalence of 20% in the acute care setting. The test returns positive for a patient. The ACNP
explains to the student that a high sensitivity ensures:
A. A high negative predictive value (NPV).
B. A high positive predictive value (PPV).
C. The test accurately identifies those without the disease.
D. The test is useful for ruling in the disease.
A. A high negative predictive value (NPV). [CORRECT]
Sensitivity (SNOUT) refers to the ability of a test to correctly identify those with the disease. A
highly sensitive test (SnNout) has a high Negative Predictive Value; if the test is negative, it
effectively rules out the disease. Specificity (SPIN) rules in disease.
Correct Answer: A
4. A 65-year-old patient presents with fever, dyspnea, and a new infiltrate on chest X-ray. To
determine the severity of Community-Acquired Pneumonia (CAP) and the appropriate site of
care (inpatient vs. outpatient), which clinical decision rule should the ACNP utilize?
A. CURB-65
B. CHA2DS2-VASc
C. Wells Criteria
D. Geneva Score
A. CURB-65 [CORRECT]
,3
CURB-65 (Confusion, Urea >19 mg/dL, Respiratory rate ≥30, Blood pressure <90/60, age ≥65)
is the recommended scoring system to assess mortality risk in CAP and guide admission
decisions. CHA2DS2-VASc is for stroke risk in AFib, Wells for DVT/PE, and Geneva for PE.
Correct Answer: A
5. When applying Bayesian reasoning to a patient with suspected pulmonary embolism, the
ACNP understands that the "pre-test probability" is most crucial for:
A. Determining the length of anticoagulation therapy.
B. Interpreting the results of a D-dimer assay.
C. Selecting the appropriate antibiotic regimen.
D. Deciding if the patient needs ICU admission.
B. Interpreting the results of a D-dimer assay. [CORRECT]
Bayesian reasoning states that the usefulness of a diagnostic test depends on the pre-test
probability. A D-dimer is most useful when the pre-test probability is low (negative D-dimer
rules out PE) or moderate; in high pre-test probability, a positive D-dimer adds little diagnostic
value as imaging is required regardless.
Correct Answer: B
6. A patient presents with acute abdominal pain. The ACNP orders a CT scan with contrast. The
radiology report notes a "Likelihood Ratio (LR+) of 12" for the finding of appendiceal
thickening regarding appendicitis. This indicates:
A. The finding is useful for ruling out appendicitis.
B. The finding significantly increases the probability of appendicitis.
C. The finding has no diagnostic value.
D. The test has poor sensitivity.
B. The finding significantly increases the probability of appendicitis. [CORRECT]
, 4
A Likelihood Ratio Positive (LR+) greater than 10 indicates a large and often conclusive increase
in the probability of the disease. An LR+ of 12 for appendiceal thickening strongly rules in the
diagnosis of appendicitis. An LR- < 0.1 would rule it out.
Correct Answer: B
7. The ACNP is reviewing a clinical practice guideline (CPG) for heart failure management.
Which level of evidence is considered the strongest in the hierarchy of evidence?
A. Expert opinion
B. Case-control studies
C. Randomized Controlled Trials (RCTs) and Meta-analyses
D. Cohort studies
C. Randomized Controlled Trials (RCTs) and Meta-analyses [CORRECT]
The hierarchy of evidence ranks systematic reviews and meta-analyses of RCTs at the top,
followed by individual RCTs. These provide the strongest evidence for causality and treatment
efficacy due to randomization and control of bias, unlike observational studies or expert opinion.
Correct Answer: C
8. A 55-year-old male presents with "tearing" chest pain radiating to the back. The ACNP must
rapidly differentiate between Aortic Dissection and Acute Coronary Syndrome (ACS). Which
"red flag" finding most strongly suggests Aortic Dissection?
A. ST-segment elevation in lead aVR
B. Pulse deficit between arms
C. Elevated Troponin I
D. Nausea and vomiting
B. Pulse deficit between arms [CORRECT]
A pulse deficit (difference in blood pressure or pulse strength between arms) is a classic and
highly specific sign of aortic dissection, particularly involving the subclavian artery. While aVR
