NSG 550 Exams 1–3 | Wilkes Diagnostic Reasoning |
2026/2027 Verified Q&A with Detailed Rationales | Pass
with Confidence
NSG 550 Diagnostic Reasoning (Exams 1–3) Complete Bundle – Your Ultimate Pass Guarantee
for Wilkes University! This comprehensive exam prep includes ALL THREE
EXAMS with verified questions and answers, expert rationales, and NGN-style case scenarios.
Covering Modules 1–4 (Clinical Reasoning, Urologic/Renal, Endocrine, Immunologic/Skeletal),
Modules 5–8 (Pulmonary, Cardiovascular, GI/Hepatobiliary), and Advanced Diagnostic
Applications (Reproductive, Tumor Markers, Imaging). Save 57% vs. buying
separately! Developed by top-performing APRN students.
Features:
100% correct answers with detailed explanations
Latest 2025/2026 updates
Instant PDF download
Comprehensive coverage of cognitive biases, Bayesian reasoning, lab interpretation,
imaging modalities, and differential diagnosis frameworks. Pass with confidence!
#NPStudent #WilkesUniversity #DiagnosticReasoning
,EXAM 1: MODULES 1-4 (Clinical Reasoning, Urologic/Renal, Endocrine,
Immunologic/Skeletal)
50 Multiple Choice Questions
1. A 45-year-old female presents with fatigue, weight gain, constipation, and cold
intolerance. Her TSH is 8.5 mIU/L (normal 0.4-4.0) and free T4 is 0.6 ng/dL (normal 0.8-
1.8). Which of the following is the most likely diagnosis?
A. Subclinical hypothyroidism
B. Primary hypothyroidism
C. Secondary hypothyroidism
D. Euthyroid sick syndrome
B. Primary hypothyroidism is correct. The elevated TSH with low free T4 indicates primary
thyroid gland failure, most commonly from Hashimoto's thyroiditis. The TSH is appropriately
elevated in response to low thyroid hormone levels.
A. Subclinical hypothyroidism would show elevated TSH with normal free T4. C. Secondary
hypothyroidism would show low TSH with low free T4 (pituitary dysfunction). D. Euthyroid sick
syndrome shows low T3 with normal TSH in acute illness.
2. A 72-year-old male with diabetes and hypertension undergoes a CT scan with IV contrast
for evaluation of abdominal pain. His baseline creatinine is 1.2 mg/dL. Three days later,
his creatinine rises to 1.8 mg/dL. What is the most likely diagnosis?
A. Acute interstitial nephritis
B. Contrast-induced nephropathy
C. Prerenal azotemia
D. Acute tubular necrosis from hypotension
B. Contrast-induced nephropathy is correct. The 50% rise in creatinine (from 1.2 to 1.8 mg/dL)
within 3 days of contrast exposure defines contrast-induced nephropathy. Risk factors include
preexisting renal disease and diabetes.
A. Acute interstitial nephritis typically presents with fever, rash, eosinophilia and is drug-induced.
C. Prerenal azotemia would improve with hydration. D. ATN from hypotension would have a
different clinical context.
, 3. Which of the following cognitive biases occurs when a clinician latches onto initial
information and fails to adjust the diagnosis as new information emerges?
A. Confirmation bias
B. Availability heuristic
C. Anchoring bias
D. Premature closure
C. Anchoring bias is correct. This occurs when the clinician fixes on the initial impression and
fails to adequately consider alternative diagnoses as new data becomes available.
A. Confirmation bias is seeking evidence that supports the initial impression. B. Availability
heuristic is judging likelihood based on how easily similar cases come to mind. D. Premature
closure is stopping the diagnostic process too early.
4. A 55-year-old male presents with acute onset of severe flank pain radiating to the groin,
nausea, and hematuria. A non-contrast CT reveals a 4 mm stone in the proximal ureter.
What is the most appropriate initial management?
A. Immediate ureteroscopy with laser lithotripsy
B. Observation with increased fluids and tamsulosin
C. Extracorporeal shock wave lithotripsy
D. Percutaneous nephrolithotomy
B. Observation with increased fluids and tamsulosin is correct. Stones <5 mm have >90%
chance of spontaneous passage. Medical expulsive therapy with an alpha-blocker (tamsulosin)
facilitates passage.
A. Immediate intervention is not indicated for small stones. C. ESWL is an option but not first-line
for small stones. D. Percutaneous nephrolithotomy is for large staghorn calculi.
5. A 28-year-old female presents with palpitations, heat intolerance, weight loss, and a
diffusely enlarged thyroid. Her TSH is <0.01 mIU/L and free T4 is elevated. Which
diagnostic study would best confirm Graves' disease?
A. Thyroid ultrasound
B. Radioactive iodine uptake scan
C. Thyroid stimulating immunoglobulin (TSI) assay
D. Fine needle aspiration biopsy
, C. Thyroid stimulating immunoglobulin (TSI) assay is correct. TSI is the pathogenic antibody in
Graves' disease that stimulates the TSH receptor. A positive TSI confirms the diagnosis without
radiation exposure.
A. Ultrasound shows vascularity but is not diagnostic. B. RAIU shows diffuse uptake but requires
radiation and doesn't distinguish Graves' from other causes as definitively as TSI. D. Biopsy is for
nodules, not diffuse goiter.
6. A 65-year-old female on hydrochlorothiazide for hypertension presents with muscle
weakness, fatigue, and cramping. Her serum potassium is 2.8 mEq/L. Which of the
following represents the most appropriate next step in evaluation?
A. Check serum magnesium level
B. Order 24-hour urine potassium
C. Start oral potassium supplementation
D. Check arterial blood gas
A. Check serum magnesium level is correct. Hypokalemia is frequently accompanied by
hypomagnesemia, and magnesium must be replaced before potassium will normalize. This is
especially true with thiazide diuretic use.
B. Urine potassium would help determine renal vs GI losses but is not the next step before
checking magnesium. C. Supplementation without checking magnesium will be ineffective. D.
ABG would assess acid-base status but is not first-line.
7. A 58-year-old male with known COPD presents with worsening dyspnea. His FEV1/FVC
ratio is 65% and FEV1 is 45% of predicted. Which of the following best describes his
pulmonary function test results?
A. Normal pulmonary function
B. Restrictive pattern
C. Obstructive pattern
D. Mixed obstructive-restrictive pattern
C. Obstructive pattern is correct. An FEV1/FVC ratio <70% indicates obstruction. The reduced
FEV1 at 45% predicted indicates moderate-to-severe obstruction, consistent with his COPD
diagnosis.
A. Normal would show FEV1/FVC >70% and FEV1 >80%. B. Restrictive would show FEV1/FVC
normal or elevated with reduced FVC. D. Mixed would show reduced FEV1/FVC and reduced FVC.
2026/2027 Verified Q&A with Detailed Rationales | Pass
with Confidence
NSG 550 Diagnostic Reasoning (Exams 1–3) Complete Bundle – Your Ultimate Pass Guarantee
for Wilkes University! This comprehensive exam prep includes ALL THREE
EXAMS with verified questions and answers, expert rationales, and NGN-style case scenarios.
Covering Modules 1–4 (Clinical Reasoning, Urologic/Renal, Endocrine, Immunologic/Skeletal),
Modules 5–8 (Pulmonary, Cardiovascular, GI/Hepatobiliary), and Advanced Diagnostic
Applications (Reproductive, Tumor Markers, Imaging). Save 57% vs. buying
separately! Developed by top-performing APRN students.
Features:
100% correct answers with detailed explanations
Latest 2025/2026 updates
Instant PDF download
Comprehensive coverage of cognitive biases, Bayesian reasoning, lab interpretation,
imaging modalities, and differential diagnosis frameworks. Pass with confidence!
#NPStudent #WilkesUniversity #DiagnosticReasoning
,EXAM 1: MODULES 1-4 (Clinical Reasoning, Urologic/Renal, Endocrine,
Immunologic/Skeletal)
50 Multiple Choice Questions
1. A 45-year-old female presents with fatigue, weight gain, constipation, and cold
intolerance. Her TSH is 8.5 mIU/L (normal 0.4-4.0) and free T4 is 0.6 ng/dL (normal 0.8-
1.8). Which of the following is the most likely diagnosis?
A. Subclinical hypothyroidism
B. Primary hypothyroidism
C. Secondary hypothyroidism
D. Euthyroid sick syndrome
B. Primary hypothyroidism is correct. The elevated TSH with low free T4 indicates primary
thyroid gland failure, most commonly from Hashimoto's thyroiditis. The TSH is appropriately
elevated in response to low thyroid hormone levels.
A. Subclinical hypothyroidism would show elevated TSH with normal free T4. C. Secondary
hypothyroidism would show low TSH with low free T4 (pituitary dysfunction). D. Euthyroid sick
syndrome shows low T3 with normal TSH in acute illness.
2. A 72-year-old male with diabetes and hypertension undergoes a CT scan with IV contrast
for evaluation of abdominal pain. His baseline creatinine is 1.2 mg/dL. Three days later,
his creatinine rises to 1.8 mg/dL. What is the most likely diagnosis?
A. Acute interstitial nephritis
B. Contrast-induced nephropathy
C. Prerenal azotemia
D. Acute tubular necrosis from hypotension
B. Contrast-induced nephropathy is correct. The 50% rise in creatinine (from 1.2 to 1.8 mg/dL)
within 3 days of contrast exposure defines contrast-induced nephropathy. Risk factors include
preexisting renal disease and diabetes.
A. Acute interstitial nephritis typically presents with fever, rash, eosinophilia and is drug-induced.
C. Prerenal azotemia would improve with hydration. D. ATN from hypotension would have a
different clinical context.
, 3. Which of the following cognitive biases occurs when a clinician latches onto initial
information and fails to adjust the diagnosis as new information emerges?
A. Confirmation bias
B. Availability heuristic
C. Anchoring bias
D. Premature closure
C. Anchoring bias is correct. This occurs when the clinician fixes on the initial impression and
fails to adequately consider alternative diagnoses as new data becomes available.
A. Confirmation bias is seeking evidence that supports the initial impression. B. Availability
heuristic is judging likelihood based on how easily similar cases come to mind. D. Premature
closure is stopping the diagnostic process too early.
4. A 55-year-old male presents with acute onset of severe flank pain radiating to the groin,
nausea, and hematuria. A non-contrast CT reveals a 4 mm stone in the proximal ureter.
What is the most appropriate initial management?
A. Immediate ureteroscopy with laser lithotripsy
B. Observation with increased fluids and tamsulosin
C. Extracorporeal shock wave lithotripsy
D. Percutaneous nephrolithotomy
B. Observation with increased fluids and tamsulosin is correct. Stones <5 mm have >90%
chance of spontaneous passage. Medical expulsive therapy with an alpha-blocker (tamsulosin)
facilitates passage.
A. Immediate intervention is not indicated for small stones. C. ESWL is an option but not first-line
for small stones. D. Percutaneous nephrolithotomy is for large staghorn calculi.
5. A 28-year-old female presents with palpitations, heat intolerance, weight loss, and a
diffusely enlarged thyroid. Her TSH is <0.01 mIU/L and free T4 is elevated. Which
diagnostic study would best confirm Graves' disease?
A. Thyroid ultrasound
B. Radioactive iodine uptake scan
C. Thyroid stimulating immunoglobulin (TSI) assay
D. Fine needle aspiration biopsy
, C. Thyroid stimulating immunoglobulin (TSI) assay is correct. TSI is the pathogenic antibody in
Graves' disease that stimulates the TSH receptor. A positive TSI confirms the diagnosis without
radiation exposure.
A. Ultrasound shows vascularity but is not diagnostic. B. RAIU shows diffuse uptake but requires
radiation and doesn't distinguish Graves' from other causes as definitively as TSI. D. Biopsy is for
nodules, not diffuse goiter.
6. A 65-year-old female on hydrochlorothiazide for hypertension presents with muscle
weakness, fatigue, and cramping. Her serum potassium is 2.8 mEq/L. Which of the
following represents the most appropriate next step in evaluation?
A. Check serum magnesium level
B. Order 24-hour urine potassium
C. Start oral potassium supplementation
D. Check arterial blood gas
A. Check serum magnesium level is correct. Hypokalemia is frequently accompanied by
hypomagnesemia, and magnesium must be replaced before potassium will normalize. This is
especially true with thiazide diuretic use.
B. Urine potassium would help determine renal vs GI losses but is not the next step before
checking magnesium. C. Supplementation without checking magnesium will be ineffective. D.
ABG would assess acid-base status but is not first-line.
7. A 58-year-old male with known COPD presents with worsening dyspnea. His FEV1/FVC
ratio is 65% and FEV1 is 45% of predicted. Which of the following best describes his
pulmonary function test results?
A. Normal pulmonary function
B. Restrictive pattern
C. Obstructive pattern
D. Mixed obstructive-restrictive pattern
C. Obstructive pattern is correct. An FEV1/FVC ratio <70% indicates obstruction. The reduced
FEV1 at 45% predicted indicates moderate-to-severe obstruction, consistent with his COPD
diagnosis.
A. Normal would show FEV1/FVC >70% and FEV1 >80%. B. Restrictive would show FEV1/FVC
normal or elevated with reduced FVC. D. Mixed would show reduced FEV1/FVC and reduced FVC.
