NR569 Midterm Exam : Differential Diagnosis in Acute Care –
Patient Assessment, Diagnostic Testing, Clinical Conditions,
and Pharmacology with Rationales
SECTION 1: PATIENT ASSESSMENT FOUNDATIONS
Q1: What is the difference between subjective and objective data in patient assessments?
☑ Correct Answer: Subjective data is reported by the patient (symptoms, feelings, perceptions), while
objective data is observed through physical examination, laboratory information, and test data .
📝 Rationale: Subjective data includes the chief complaint, history of present illness, and review of
systems—information only the patient can provide. Objective data is measurable and verifiable by the
clinician.
Q2: What are the components of a comprehensive adult health history?
☑ Correct Answer: (1) Initial information (identifying patient information/source/reliability), (2) Chief
Complaint(s), (3) History of Present Illness, (4) Past Medical History, (5) Family History, (6)
Personal/Social History, (7) Review of Systems (ROS) .
📝 Rationale: A comprehensive history provides fundamental knowledge about the patient, strengthens
the clinician-patient relationship, and creates a baseline for future assessments.
Q3: When is a comprehensive patient assessment appropriate versus a focused patient assessment?
☑ Correct Answer: Comprehensive assessment is appropriate for new patients in the office or hospital.
,Focused assessment is appropriate for established patients, especially during routine or urgent care
visits .
📝 Rationale: The comprehensive assessment provides baseline data and addresses all systems. The
focused assessment addresses specific concerns or symptoms restricted to a particular body system.
Q4: What are the components of skilled interviewing techniques?
☑ Correct Answer: Active or attentive listening, connecting to the patient's emotional state, and using
verbal and nonverbal skills to encourage patient expression .
📝 Rationale: Skilled interviewing goes beyond asking questions—it requires therapeutic communication
that builds rapport and elicits accurate information.
Q5: What is the difference between pertinent positives and pertinent negatives in medical
documentation?
☑ Correct Answer: Pertinent positives are symptoms or signs that are present that support a possible
diagnosis. Pertinent negatives are expected symptoms or signs that are NOT present, which weaken that
diagnosis .
📝 Rationale: Documenting both helps justify your clinical reasoning and differential diagnosis. For
example, in a patient with chest pain, "no radiation to left arm" is a pertinent negative that may argue
against myocardial infarction.
,SECTION 2: DIFFERENTIAL DIAGNOSIS PROCESS
Q6: What is the significance of creating a differential diagnosis?
☑ Correct Answer: It involves using clinical reasoning to distinguish between two or more conditions that
share similar signs and symptoms .
📝 Rationale: Based on the chief complaint, the NP gathers information through PMH (subjective data)
and physical examination (objective data) to establish a broad list of common and uncommon
diagnoses. As more data is collected, competing hypotheses are either confirmed, disproved, or
prioritized.
Q7: What are the steps for creating a differential diagnosis?
☑ Correct Answer: (1) Start with a broad list until further information is obtained, (2) List top diagnosis
FIRST followed by other potential diagnoses, (3) Aggressively prioritize the most likely and most harmful
(life-threatening) diagnoses, (4) Prioritize ACUTE and REVERSIBLE diseases first, (5) Remove diagnoses as
information rules them out, (6) Once confirmed, make problem list diagnosis-oriented .
📝 Rationale: This systematic approach ensures patient safety by addressing dangerous conditions first
while maintaining diagnostic accuracy.
Q8: What does the clinical adage "Hoofbeats = Horses NOT Zebras" mean in differential diagnosis?
☑ Correct Answer: Common presentations are more likely due to common conditions; clinicians should
consider the most likely diagnoses first before rare ones .
, 📝 Rationale: While rare diseases exist, diagnostic reasoning should begin with conditions that have the
highest probability given the patient's presentation, demographics, and risk factors.
Q9: What is the role of clinical reasoning in creating a differential diagnosis?
☑ Correct Answer: Clinical reasoning integrates patient data, medical knowledge, and experience to
generate and refine diagnostic hypotheses .
📝 Rationale: Clinical reasoning is the cognitive process that allows the clinician to move from initial
presentation to prioritized differential list through iterative hypothesis generation and testing.
Q10: What are the four cardinal elements of evidence-based decisions?
☑ Correct Answer: (1) The research evidence, (2) The patient's clinical state, (3) The patient's preference,
(4) The clinician's judgment and expertise .
📝 Rationale: Evidence-based practice integrates these four elements to provide optimal patient care.
Q11: What is the PICOT format in evidence-based practice?
☑ Correct Answer: A mnemonic for clinical research
questions: Patient/Population, Intervention, Comparison, Outcome, and Time .
📝 Rationale: The PICOT process begins with a case scenario, and the question is phrased to elicit an
answer that guides literature search and clinical decision-making.
Q12: Which study design provides the most powerful results and is the gold standard for determining
the effect of a therapeutic intervention?
Patient Assessment, Diagnostic Testing, Clinical Conditions,
and Pharmacology with Rationales
SECTION 1: PATIENT ASSESSMENT FOUNDATIONS
Q1: What is the difference between subjective and objective data in patient assessments?
☑ Correct Answer: Subjective data is reported by the patient (symptoms, feelings, perceptions), while
objective data is observed through physical examination, laboratory information, and test data .
📝 Rationale: Subjective data includes the chief complaint, history of present illness, and review of
systems—information only the patient can provide. Objective data is measurable and verifiable by the
clinician.
Q2: What are the components of a comprehensive adult health history?
☑ Correct Answer: (1) Initial information (identifying patient information/source/reliability), (2) Chief
Complaint(s), (3) History of Present Illness, (4) Past Medical History, (5) Family History, (6)
Personal/Social History, (7) Review of Systems (ROS) .
📝 Rationale: A comprehensive history provides fundamental knowledge about the patient, strengthens
the clinician-patient relationship, and creates a baseline for future assessments.
Q3: When is a comprehensive patient assessment appropriate versus a focused patient assessment?
☑ Correct Answer: Comprehensive assessment is appropriate for new patients in the office or hospital.
,Focused assessment is appropriate for established patients, especially during routine or urgent care
visits .
📝 Rationale: The comprehensive assessment provides baseline data and addresses all systems. The
focused assessment addresses specific concerns or symptoms restricted to a particular body system.
Q4: What are the components of skilled interviewing techniques?
☑ Correct Answer: Active or attentive listening, connecting to the patient's emotional state, and using
verbal and nonverbal skills to encourage patient expression .
📝 Rationale: Skilled interviewing goes beyond asking questions—it requires therapeutic communication
that builds rapport and elicits accurate information.
Q5: What is the difference between pertinent positives and pertinent negatives in medical
documentation?
☑ Correct Answer: Pertinent positives are symptoms or signs that are present that support a possible
diagnosis. Pertinent negatives are expected symptoms or signs that are NOT present, which weaken that
diagnosis .
📝 Rationale: Documenting both helps justify your clinical reasoning and differential diagnosis. For
example, in a patient with chest pain, "no radiation to left arm" is a pertinent negative that may argue
against myocardial infarction.
,SECTION 2: DIFFERENTIAL DIAGNOSIS PROCESS
Q6: What is the significance of creating a differential diagnosis?
☑ Correct Answer: It involves using clinical reasoning to distinguish between two or more conditions that
share similar signs and symptoms .
📝 Rationale: Based on the chief complaint, the NP gathers information through PMH (subjective data)
and physical examination (objective data) to establish a broad list of common and uncommon
diagnoses. As more data is collected, competing hypotheses are either confirmed, disproved, or
prioritized.
Q7: What are the steps for creating a differential diagnosis?
☑ Correct Answer: (1) Start with a broad list until further information is obtained, (2) List top diagnosis
FIRST followed by other potential diagnoses, (3) Aggressively prioritize the most likely and most harmful
(life-threatening) diagnoses, (4) Prioritize ACUTE and REVERSIBLE diseases first, (5) Remove diagnoses as
information rules them out, (6) Once confirmed, make problem list diagnosis-oriented .
📝 Rationale: This systematic approach ensures patient safety by addressing dangerous conditions first
while maintaining diagnostic accuracy.
Q8: What does the clinical adage "Hoofbeats = Horses NOT Zebras" mean in differential diagnosis?
☑ Correct Answer: Common presentations are more likely due to common conditions; clinicians should
consider the most likely diagnoses first before rare ones .
, 📝 Rationale: While rare diseases exist, diagnostic reasoning should begin with conditions that have the
highest probability given the patient's presentation, demographics, and risk factors.
Q9: What is the role of clinical reasoning in creating a differential diagnosis?
☑ Correct Answer: Clinical reasoning integrates patient data, medical knowledge, and experience to
generate and refine diagnostic hypotheses .
📝 Rationale: Clinical reasoning is the cognitive process that allows the clinician to move from initial
presentation to prioritized differential list through iterative hypothesis generation and testing.
Q10: What are the four cardinal elements of evidence-based decisions?
☑ Correct Answer: (1) The research evidence, (2) The patient's clinical state, (3) The patient's preference,
(4) The clinician's judgment and expertise .
📝 Rationale: Evidence-based practice integrates these four elements to provide optimal patient care.
Q11: What is the PICOT format in evidence-based practice?
☑ Correct Answer: A mnemonic for clinical research
questions: Patient/Population, Intervention, Comparison, Outcome, and Time .
📝 Rationale: The PICOT process begins with a case scenario, and the question is phrased to elicit an
answer that guides literature search and clinical decision-making.
Q12: Which study design provides the most powerful results and is the gold standard for determining
the effect of a therapeutic intervention?
