Wilkes University NSG 550 Exam 2 Diagnostic Reasoning –
(2026/2027) Actual Questions, Verified Answers with
Rationales | Guarantee Pass
1. Which component of the patient encounter contributes most to establishing
an accurate diagnosis?
• A. Physical examination alone
• B. Laboratory testing
• C. A comprehensive history
• D. Diagnostic imaging
• Answer: C. A thorough patient history is the cornerstone of the diagnostic
process, establishing approximately 70–80% of diagnoses before any tests
are ordered.
2. A patient's chief complaint should be documented as:
• A. The clinician's diagnosis
• B. The patient's own words whenever possible
• C. The most abnormal laboratory finding
• D. The final medical impression
• Answer: B. The chief complaint should reflect the patient's primary reason
for seeking care using their own words.
3. Which diagnostic error results from relying too heavily on the first
impression?
• A. Availability bias
• B. Confirmation bias
• C. Anchoring bias
• D. Outcome bias
, • Answer: C. Anchoring bias is the tendency to latch onto the first piece of
information and fail to adequately consider subsequent data.
4. Which finding is considered a red flag in patients presenting with headache?
• A. Intermittent tension headache
• B. Headache after prolonged screen time
• C. Sudden severe "thunderclap" headache
• D. Mild sinus congestion
• Answer: C. A thunderclap headache is a sudden, severe headache that
reaches maximum intensity within minutes and may indicate a
subarachnoid hemorrhage, requiring emergency evaluation.
5. Which laboratory test is most useful for evaluating long-term glucose control?
• A. Fasting glucose
• B. Random glucose
• C. Hemoglobin A1c
• D. Urinalysis
• Answer: C. Hemoglobin A1c reflects average blood glucose levels over the
past 2-3 months, making it the standard test for monitoring long-term
glycemic control.
6. What is the first diagnostic test used to diagnose Peripheral Artery Disease
(PAD)?
• A. Arteriography
• B. Doppler ultrasound
• C. Ankle-Brachial Index (ABI)
• D. CT angiography
• Answer: C. The ABI compares blood pressure in the ankle with that in the
arm. A healthy ABI is 1.00 or greater; an ABI less than 0.90 suggests PAD.
,7. A hallmark symptom of PAD is:
• A. Leg swelling that worsens with elevation
• B. Pain, aching, or cramping in the legs with walking that resolves with rest
• C. Leg pain that is worse at night
• D. Constant, throbbing pain in the feet
• Answer: B. This is known as intermittent claudication, the most common
symptom of PAD, caused by insufficient blood flow to the muscles during
exercise.
8. Which test is used to assess for heart failure by measuring a hormone
released from the ventricles?
• A. Troponin
• B. B-type Natriuretic Peptide (BNP)
• C. C-reactive protein (CRP)
• D. Complete Metabolic Panel (CMP)
• Answer: B. BNP is a blood test used to help rule out heart failure as a cause
of dyspnea.
9. What does the FEV1/FVC ratio measure?
• A. Total lung capacity
• B. Residual volume
• C. The percentage of vital capacity exhaled in the first second
• D. Peak expiratory flow rate
• Answer: C. This ratio is key in diagnosing obstructive vs. restrictive lung
disease. A low ratio (<70%) is indicative of an obstructive pattern like COPD
or asthma.
10. What is required for the diagnosis of COPD?
• A. Abnormal chest X-ray
, • B. Low oxygen saturation on pulse oximetry
• C. Persistent airflow limitation on spirometry (FEV1/FVC < 70% post-
bronchodilator)
• D. History of smoking for 20 pack-years
• Answer: C. Spirometry is the gold standard for diagnosing COPD,
demonstrating persistent airflow obstruction that is not fully reversible.
11. Alpha-1 antitrypsin deficiency is a genetic test used to identify a risk for
which condition?
• A. Cystic fibrosis
• B. Early-onset emphysema
• C. Alpha-thalassemia
• D. Pulmonary fibrosis
• Answer: B. A deficiency in this enzyme is associated with an increased risk
of developing emphysema, particularly at a younger age, and can be
worsened by smoking.
12. A Ventilation/Perfusion (V/Q) scan is primarily used to evaluate for:
• A. Pneumonia
• B. Pulmonary embolism
• C. Lung cancer
• D. Pleural effusion
• Answer: B. This nuclear medicine study assesses airflow (ventilation) and
blood flow (perfusion) in the lungs. A mismatch (ventilation without
perfusion) is highly suggestive of a pulmonary embolism.
13. What is the primary role of a D-dimer test in a patient with suspected PE?
• A. To confirm the diagnosis of PE
• B. To rule out a PE in a low-risk patient
(2026/2027) Actual Questions, Verified Answers with
Rationales | Guarantee Pass
1. Which component of the patient encounter contributes most to establishing
an accurate diagnosis?
• A. Physical examination alone
• B. Laboratory testing
• C. A comprehensive history
• D. Diagnostic imaging
• Answer: C. A thorough patient history is the cornerstone of the diagnostic
process, establishing approximately 70–80% of diagnoses before any tests
are ordered.
2. A patient's chief complaint should be documented as:
• A. The clinician's diagnosis
• B. The patient's own words whenever possible
• C. The most abnormal laboratory finding
• D. The final medical impression
• Answer: B. The chief complaint should reflect the patient's primary reason
for seeking care using their own words.
3. Which diagnostic error results from relying too heavily on the first
impression?
• A. Availability bias
• B. Confirmation bias
• C. Anchoring bias
• D. Outcome bias
, • Answer: C. Anchoring bias is the tendency to latch onto the first piece of
information and fail to adequately consider subsequent data.
4. Which finding is considered a red flag in patients presenting with headache?
• A. Intermittent tension headache
• B. Headache after prolonged screen time
• C. Sudden severe "thunderclap" headache
• D. Mild sinus congestion
• Answer: C. A thunderclap headache is a sudden, severe headache that
reaches maximum intensity within minutes and may indicate a
subarachnoid hemorrhage, requiring emergency evaluation.
5. Which laboratory test is most useful for evaluating long-term glucose control?
• A. Fasting glucose
• B. Random glucose
• C. Hemoglobin A1c
• D. Urinalysis
• Answer: C. Hemoglobin A1c reflects average blood glucose levels over the
past 2-3 months, making it the standard test for monitoring long-term
glycemic control.
6. What is the first diagnostic test used to diagnose Peripheral Artery Disease
(PAD)?
• A. Arteriography
• B. Doppler ultrasound
• C. Ankle-Brachial Index (ABI)
• D. CT angiography
• Answer: C. The ABI compares blood pressure in the ankle with that in the
arm. A healthy ABI is 1.00 or greater; an ABI less than 0.90 suggests PAD.
,7. A hallmark symptom of PAD is:
• A. Leg swelling that worsens with elevation
• B. Pain, aching, or cramping in the legs with walking that resolves with rest
• C. Leg pain that is worse at night
• D. Constant, throbbing pain in the feet
• Answer: B. This is known as intermittent claudication, the most common
symptom of PAD, caused by insufficient blood flow to the muscles during
exercise.
8. Which test is used to assess for heart failure by measuring a hormone
released from the ventricles?
• A. Troponin
• B. B-type Natriuretic Peptide (BNP)
• C. C-reactive protein (CRP)
• D. Complete Metabolic Panel (CMP)
• Answer: B. BNP is a blood test used to help rule out heart failure as a cause
of dyspnea.
9. What does the FEV1/FVC ratio measure?
• A. Total lung capacity
• B. Residual volume
• C. The percentage of vital capacity exhaled in the first second
• D. Peak expiratory flow rate
• Answer: C. This ratio is key in diagnosing obstructive vs. restrictive lung
disease. A low ratio (<70%) is indicative of an obstructive pattern like COPD
or asthma.
10. What is required for the diagnosis of COPD?
• A. Abnormal chest X-ray
, • B. Low oxygen saturation on pulse oximetry
• C. Persistent airflow limitation on spirometry (FEV1/FVC < 70% post-
bronchodilator)
• D. History of smoking for 20 pack-years
• Answer: C. Spirometry is the gold standard for diagnosing COPD,
demonstrating persistent airflow obstruction that is not fully reversible.
11. Alpha-1 antitrypsin deficiency is a genetic test used to identify a risk for
which condition?
• A. Cystic fibrosis
• B. Early-onset emphysema
• C. Alpha-thalassemia
• D. Pulmonary fibrosis
• Answer: B. A deficiency in this enzyme is associated with an increased risk
of developing emphysema, particularly at a younger age, and can be
worsened by smoking.
12. A Ventilation/Perfusion (V/Q) scan is primarily used to evaluate for:
• A. Pneumonia
• B. Pulmonary embolism
• C. Lung cancer
• D. Pleural effusion
• Answer: B. This nuclear medicine study assesses airflow (ventilation) and
blood flow (perfusion) in the lungs. A mismatch (ventilation without
perfusion) is highly suggestive of a pulmonary embolism.
13. What is the primary role of a D-dimer test in a patient with suspected PE?
• A. To confirm the diagnosis of PE
• B. To rule out a PE in a low-risk patient
