NR 569 MIDTERM EXAM ACTUAL 2026/2027 |
DIFFERENTIAL DIAGNOSIS ACUTE CARE
PRACTICUM | WEEKS 1-4 VERIFIED Q&A |
CHAMBERLAIN | PASS GUARANTEED - A+
GRADED QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) PLUS
RATIONALES 2026 Q&A | INSTANT
DOWNLOAD PDF.
Core Domains:
• Clinical Reasoning and Diagnostic Frameworks (SNAPPs, OLDCARTS)
• Diagnostic Accuracy and Bayesian Analysis (Sensitivity, Specificity,
Likelihood Ratios, PPV, NPV)
• Comprehensive Patient Assessment, History Taking, and Documentation
• Respiratory System Differential Diagnosis
• Cardiovascular System Differential Diagnosis
• Gastrointestinal and Abdominal Differential Diagnosis
• Infectious Diseases, Systemic Conditions, and Fever Evaluation
• Integrated Clinical Scenarios and Diagnostic Decision-Making
Introduction:
The NR 569 Midterm Examination assesses the acute care nurse practitioner
student's competency in differential diagnosis and clinical decision-making.
The examination evaluates foundational theory, applied professional
knowledge, diagnostic accuracy principles, and evidence-based acute care
,practice. The test structure incorporates multiple-choice and scenario-based
questions that emphasize real-world application, critical thinking, and
prioritization. Candidates are expected to demonstrate competency in
hypothesis-driven reasoning, pattern recognition, Bayesian analysis, and the
systematic evaluation of complex clinical presentations. A strong emphasis is
placed on diagnostic safety, clinical judgment, and the integration of
Chamberlain University NR 569 Weeks 1–4 differential diagnosis concepts.
SECTION ONE: QUESTIONS 1–100
1. A nurse practitioner student is presenting a complex case to their
preceptor using the SNApps framework. After summarizing the history
and physical, the student narrows the differential to three possibilities
and then begins to compare and contrast the clinical findings of each.
Which component of SNApps is the student demonstrating?
A. Probe
B. Analyze
C. Plan
D. Select
Correct answer: B
RATIONALE: The SNApps mnemonic stands for Summarize, Narrow,
Analyze, Probe, Plan, and Select. The "Analyze" step involves comparing and
contrasting the narrowed differential diagnoses by exploring the pertinent
positives and negatives that support or refute each possibility. This differs
from "Probe" (asking the preceptor questions about uncertainties), "Plan"
(proposing the diagnostic and therapeutic management plan), and "Select"
(choosing the most likely diagnosis with case reflection).
,2. When taking a history from a patient presenting with chest pain, the
nurse practitioner uses the OLDCARTS mnemonic. Which of the
following correctly identifies the components assessed by OLDCARTS?
A. Onset, Location/radiation, Duration, Character, Aggravating factors,
Relieving factors, Timing, Severity
B. Onset, Location, Description, Course, Associated symptoms, Risk factors,
Treatment, Status
C. Origin, Length, Duration, Character, Aggravating, Resolution, Timing,
Severity
D. Onset, Lymph nodes, Duration, Character, Aggravating, Relieving,
Treatment, Severity
Correct answer: A
RATIONALE: OLDCARTS expands to Onset, Location/Radiation,
Duration, Character, Aggravating factors, Relieving factors, Timing, and
Severity. It is a comprehensive symptom analysis framework taught in
Chamberlain NR 569 for the HPI. The other options either substitute
incorrect terms or include irrelevant elements.
3. A diagnostic test has a sensitivity of 95% for detecting pulmonary
embolism. Which principle best describes the clinical application of
this finding?
A. SpPin: A positive test rules IN the disease
B. SnNout: A negative test effectively rules OUT the disease
C. A positive test confirms the diagnosis
D. The test has high specificity for pulmonary embolism
Correct answer: B
RATIONALE: Sensitivity is the probability of a positive test when disease
is present. The mnemonic "SnNout" indicates that a test with high Sensitivity,
, when Negative, rules OUT the disease. This is why D-dimer (high sensitivity,
low specificity) is used to exclude PE when negative in low-risk patients.
4. A nurse practitioner is evaluating a new rapid test for influenza with
a specificity of 98%. A patient tests positive. Which statement best
describes the clinical significance of this result?
A. The patient definitely has influenza
B. The probability that the patient truly has influenza depends on the pretest
probability and positive likelihood ratio
C. The test has ruled out influenza
D. The test result is invalid without knowing the sensitivity
Correct answer: B
RATIONALE: Specificity is the probability of a negative test in the absence
of disease. While high specificity (SpPin: a positive test rules IN the disease)
supports the diagnosis, the posttest probability also depends on pretest
probability and the positive likelihood ratio. No test result is definitive
without clinical context.
5. A patient presents with acute dyspnea, and the NP calculates a Wells
score of 1.5 (low probability of PE). The PERC rule is applied and all 8
criteria are negative. What is the most appropriate next step?
A. Obtain a D-dimer to further reduce probability
B. No further testing for PE is required; PE is ruled out clinically
C. Order a CT pulmonary angiogram
D. Start anticoagulation empirically
Correct answer: B
RATIONALE: In patients with low pretest probability of PE (Wells < 2)
and all PERC criteria negative, the probability of PE is so low (< 1.8%) that no
DIFFERENTIAL DIAGNOSIS ACUTE CARE
PRACTICUM | WEEKS 1-4 VERIFIED Q&A |
CHAMBERLAIN | PASS GUARANTEED - A+
GRADED QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) PLUS
RATIONALES 2026 Q&A | INSTANT
DOWNLOAD PDF.
Core Domains:
• Clinical Reasoning and Diagnostic Frameworks (SNAPPs, OLDCARTS)
• Diagnostic Accuracy and Bayesian Analysis (Sensitivity, Specificity,
Likelihood Ratios, PPV, NPV)
• Comprehensive Patient Assessment, History Taking, and Documentation
• Respiratory System Differential Diagnosis
• Cardiovascular System Differential Diagnosis
• Gastrointestinal and Abdominal Differential Diagnosis
• Infectious Diseases, Systemic Conditions, and Fever Evaluation
• Integrated Clinical Scenarios and Diagnostic Decision-Making
Introduction:
The NR 569 Midterm Examination assesses the acute care nurse practitioner
student's competency in differential diagnosis and clinical decision-making.
The examination evaluates foundational theory, applied professional
knowledge, diagnostic accuracy principles, and evidence-based acute care
,practice. The test structure incorporates multiple-choice and scenario-based
questions that emphasize real-world application, critical thinking, and
prioritization. Candidates are expected to demonstrate competency in
hypothesis-driven reasoning, pattern recognition, Bayesian analysis, and the
systematic evaluation of complex clinical presentations. A strong emphasis is
placed on diagnostic safety, clinical judgment, and the integration of
Chamberlain University NR 569 Weeks 1–4 differential diagnosis concepts.
SECTION ONE: QUESTIONS 1–100
1. A nurse practitioner student is presenting a complex case to their
preceptor using the SNApps framework. After summarizing the history
and physical, the student narrows the differential to three possibilities
and then begins to compare and contrast the clinical findings of each.
Which component of SNApps is the student demonstrating?
A. Probe
B. Analyze
C. Plan
D. Select
Correct answer: B
RATIONALE: The SNApps mnemonic stands for Summarize, Narrow,
Analyze, Probe, Plan, and Select. The "Analyze" step involves comparing and
contrasting the narrowed differential diagnoses by exploring the pertinent
positives and negatives that support or refute each possibility. This differs
from "Probe" (asking the preceptor questions about uncertainties), "Plan"
(proposing the diagnostic and therapeutic management plan), and "Select"
(choosing the most likely diagnosis with case reflection).
,2. When taking a history from a patient presenting with chest pain, the
nurse practitioner uses the OLDCARTS mnemonic. Which of the
following correctly identifies the components assessed by OLDCARTS?
A. Onset, Location/radiation, Duration, Character, Aggravating factors,
Relieving factors, Timing, Severity
B. Onset, Location, Description, Course, Associated symptoms, Risk factors,
Treatment, Status
C. Origin, Length, Duration, Character, Aggravating, Resolution, Timing,
Severity
D. Onset, Lymph nodes, Duration, Character, Aggravating, Relieving,
Treatment, Severity
Correct answer: A
RATIONALE: OLDCARTS expands to Onset, Location/Radiation,
Duration, Character, Aggravating factors, Relieving factors, Timing, and
Severity. It is a comprehensive symptom analysis framework taught in
Chamberlain NR 569 for the HPI. The other options either substitute
incorrect terms or include irrelevant elements.
3. A diagnostic test has a sensitivity of 95% for detecting pulmonary
embolism. Which principle best describes the clinical application of
this finding?
A. SpPin: A positive test rules IN the disease
B. SnNout: A negative test effectively rules OUT the disease
C. A positive test confirms the diagnosis
D. The test has high specificity for pulmonary embolism
Correct answer: B
RATIONALE: Sensitivity is the probability of a positive test when disease
is present. The mnemonic "SnNout" indicates that a test with high Sensitivity,
, when Negative, rules OUT the disease. This is why D-dimer (high sensitivity,
low specificity) is used to exclude PE when negative in low-risk patients.
4. A nurse practitioner is evaluating a new rapid test for influenza with
a specificity of 98%. A patient tests positive. Which statement best
describes the clinical significance of this result?
A. The patient definitely has influenza
B. The probability that the patient truly has influenza depends on the pretest
probability and positive likelihood ratio
C. The test has ruled out influenza
D. The test result is invalid without knowing the sensitivity
Correct answer: B
RATIONALE: Specificity is the probability of a negative test in the absence
of disease. While high specificity (SpPin: a positive test rules IN the disease)
supports the diagnosis, the posttest probability also depends on pretest
probability and the positive likelihood ratio. No test result is definitive
without clinical context.
5. A patient presents with acute dyspnea, and the NP calculates a Wells
score of 1.5 (low probability of PE). The PERC rule is applied and all 8
criteria are negative. What is the most appropriate next step?
A. Obtain a D-dimer to further reduce probability
B. No further testing for PE is required; PE is ruled out clinically
C. Order a CT pulmonary angiogram
D. Start anticoagulation empirically
Correct answer: B
RATIONALE: In patients with low pretest probability of PE (Wells < 2)
and all PERC criteria negative, the probability of PE is so low (< 1.8%) that no
