AIM • KMU EXAM PRACTICE
KMU Past Paper Practice
Oliguria, Acute Kidney Injury, Uremia & Chronic Kidney Disease Across the Lifespan
Final Year MBBS • 20 A-type Single Best Answer MCQs • KMU-style clinical reasoning practice
These are AIM-generated KMU-style practice questions based on the supplied curriculum and learning material. They are not claimed to be verbatim previous KMU examination questions.
MCQ 1
A 68-year-old man with prolonged diarrhea presents with dizziness and markedly reduced urine output. His pulse is rapid, blood pressure is low and there is no peripheral edema. Which finding would most strongly support a pre-renal mechanism of kidney dysfunction?
Persistent heavy proteinuria
Clinical evidence of intravascular volume depletion
Bilateral small echogenic kidneys
Palpable distended urinary bladder
Long-standing growth failure
Correct Answer: Clinical evidence of intravascular volume depletion
Hypovolemia reduces renal perfusion and is a classic reversible pre-renal mechanism before structural renal injury develops.
MCQ 2
A 74-year-old man presents with anuria and lower abdominal discomfort. Examination reveals a palpable bladder. Which investigation is most appropriate to evaluate a post-renal cause of his kidney dysfunction?
Serum bilirubin
Peripheral blood film
Serum amylase
Renal and urinary tract ultrasonography
Chest radiography
Correct Answer: Renal and urinary tract ultrasonography
Ultrasound helps identify urinary tract obstruction and hydronephrosis and is particularly useful when post-renal AKI is suspected.
MCQ 3
A patient develops kidney dysfunction after prolonged septic hypotension. Despite restoration of circulation, serum creatinine continues to rise. Which mechanism best explains the persistent renal impairment?
Progression from renal hypoperfusion to intrinsic tubular injury
Development of chronic obstruction within hours
Increased renal filtration caused by sepsis
Increased erythropoietin secretion
Excessive renal potassium excretion
Correct Answer: Progression from renal hypoperfusion to intrinsic tubular injury
Persistent ischemia may transform reversible pre-renal dysfunction into intrinsic structural kidney injury.
MCQ 4
A woman with acute kidney injury has rising creatinine but continues to pass an apparently adequate volume of urine. Which statement best explains this finding?
Normal urine volume guarantees normal GFR
AKI requires complete anuria
Urine output is unrelated to kidney function
The patient must have chronic renal failure
Acute kidney injury may be non-oliguric
Correct Answer: Acute kidney injury may be non-oliguric
AKI can occur despite preserved urine volume; renal function must therefore be assessed with biochemical trends as well as urine output.
MCQ 5
A patient with acute kidney injury develops rapidly worsening breathlessness, bilateral basal crackles and increasing peripheral edema. Which renal consequence best accounts for these findings?
Reduced erythropoietin production
Urinary protein loss
Sodium and water retention causing fluid overload
Increased bicarbonate excretion alone
Increased glomerular filtration
Correct Answer: Sodium and water retention causing fluid overload
Reduced renal excretion leads to extracellular volume expansion and may produce pulmonary edema.
MCQ 6
A patient with AKI develops ECG abnormalities associated with a marked rise in serum potassium. Which management concern should take immediate priority?
Potential cardiac instability from hyperkalemia
Development of iron deficiency
Chronic growth impairment
Reduced serum bilirubin
Development of hyperthyroidism
Correct Answer: Potential cardiac instability from hyperkalemia
Hyperkalemia is an immediately dangerous AKI complication because severe potassium elevation can produce life-threatening cardiac arrhythmias.
MCQ 7
A patient with acute renal dysfunction has urinalysis showing significant blood and protein. Which conclusion is most appropriate?
The finding confirms pre-renal hypovolemia
The finding proves chronic renal failure
The finding excludes glomerular pathology
The pattern suggests intrinsic renal disease requiring further evaluation
The finding establishes urinary obstruction
Correct Answer: The pattern suggests intrinsic renal disease requiring further evaluation
Hematuria with significant proteinuria raises suspicion of renal parenchymal, particularly glomerular, pathology.
MCQ 8
A hospitalized patient with AKI is receiving several renally eliminated medicines. Which action best reduces the risk of treatment-related toxicity?
Increase all doses to maintain serum concentration
Review medication and adjust renally cleared drugs appropriately
Convert every medicine to intravenous administration
Stop all medicines regardless of indication
Ignore renal function if urine output is maintained
Correct Answer: Review medication and adjust renally cleared drugs appropriately
Reduced renal clearance can cause accumulation of drugs or metabolites, so prescriptions should be reviewed according to renal function.
MCQ 9
A patient with severe renal dysfunction has persistent nausea, anorexia, impaired concentration and increasing drowsiness. Which term best describes this clinical state?
Nephrotic syndrome
Isolated azotemia without symptoms
Post-renal diuresis
Renal tubular acidosis
Uremia
Correct Answer: Uremia
Uremia is the symptomatic multisystem syndrome of advanced renal dysfunction caused by retained metabolites and associated metabolic disturbances.
MCQ 10
A patient with advanced renal failure becomes confused and has persistent vomiting. His serum urea is markedly elevated. Which interpretation is most accurate?
The urea value alone defines the severity of uremia
Uremia occurs only in chronic renal disease
Clinical manifestations are important in recognizing symptomatic uremia
Normal urine volume excludes uremia
Uremia represents isolated potassium retention
Correct Answer: Clinical manifestations are important in recognizing symptomatic uremia
Uremia is a clinical syndrome, so symptoms and signs are more meaningful than interpreting the serum urea value in isolation.
MCQ 11
A 59-year-old man has persistently impaired renal function and proteinuria. Which approach best establishes the significance of these abnormalities in suspected chronic kidney disease?
Assess only urine volume
Assess chronicity, filtration and evidence of kidney damage together
Diagnose CKD from one elevated creatinine value
Ignore proteinuria if the patient feels well
Use renal ultrasound as the only diagnostic test
Correct Answer: Assess chronicity, filtration and evidence of kidney damage together
CKD assessment combines evidence that disease is persistent with measures of renal filtration and markers such as proteinuria.
MCQ 12
A patient with longstanding kidney disease has pallor, fatigue and reduced exercise tolerance. Which renal abnormality most directly contributes to these symptoms?
Increased renin secretion
Reduced potassium excretion
Increased urinary sodium loss
Reduced erythropoietin production
Increased bicarbonate generation
Correct Answer: Reduced erythropoietin production
Loss of renal endocrine function reduces erythropoietin production, contributing to anemia in chronic kidney disease.
MCQ 13
A 62-year-old patient has renal impairment of uncertain duration. Which finding most strongly supports a chronic rather than purely acute process?
Small echogenic kidneys with longstanding anemia
Sudden oliguria following gastroenteritis
Acute urinary retention
Recent severe hypotension
A creatinine rise over several hours
Correct Answer: Small echogenic kidneys with longstanding anemia
Chronic structural kidney change together with a chronic complication such as anemia strongly supports established CKD.
MCQ 14
A patient with chronic kidney disease develops bone discomfort and biochemical abnormalities related to calcium-phosphate balance. Which complication is most likely?
Acute urinary obstruction
Isolated dehydration
Acute pyelonephritis
Nephrotic syndrome
CKD-related mineral and bone disorder
Correct Answer: CKD-related mineral and bone disorder
Progressive renal dysfunction disturbs mineral metabolism and may produce important skeletal complications.
MCQ 15
A patient with CKD has stable urine output but progressive deterioration in estimated filtration and persistent proteinuria. What is the most appropriate interpretation?
Preserved urine output excludes worsening CKD
Proteinuria has no significance if urine volume is normal
Kidney disease can progress despite preserved urine volume
Normal urine output proves normal nephron function
The patient must have acute obstruction
Correct Answer: Kidney disease can progress despite preserved urine volume
Urine volume alone does not measure filtration; eGFR trends and markers of renal damage remain important in CKD monitoring.
MCQ 16
A patient with advanced CKD is being followed regularly. Which management principle best explains why continued monitoring is necessary even when symptoms temporarily improve?
Renal progression and systemic complications may continue despite temporary clinical stability
All CKD becomes completely reversible after follow-up
Monitoring is required only to record urine colour
Serum creatinine prevents cardiovascular complications
CKD has no important extra-renal effects
Correct Answer: Renal progression and systemic complications may continue despite temporary clinical stability
CKD requires ongoing monitoring for progression, anemia, electrolyte abnormalities, fluid problems, bone disease and cardiovascular complications.
MCQ 17
A patient with advanced kidney failure has persistent pulmonary edema, severe metabolic disturbance and symptomatic uremia despite appropriate conservative management. What is the most appropriate next management principle?
Discharge with routine outpatient review
Increase unrestricted oral fluid intake
Stop monitoring renal function
Consider renal replacement therapy
Treat only the serum creatinine concentration
Correct Answer: Consider renal replacement therapy
Persistent severe complications or symptomatic uremia despite medical therapy indicate the need to consider renal replacement therapy.
MCQ 18
A 5-year-old child develops oliguria following several days of vomiting and diarrhea. The child is tachycardic, has dry mucous membranes and delayed capillary refill. What is the most important initial clinical interpretation?
The child has established chronic kidney disease
Reduced renal perfusion from volume depletion is likely
The child has nephrotic syndrome
Urinary obstruction is proven
The low urine output is physiologically normal
Correct Answer: Reduced renal perfusion from volume depletion is likely
Gastrointestinal fluid loss with clear signs of dehydration strongly suggests pre-renal pediatric AKI due to reduced perfusion.
MCQ 19
A 10-year-old child with chronic kidney disease has poor appetite, pallor and falling height percentile over repeated visits. Which feature is particularly important when assessing the long-term impact of CKD in this child?
Visual acuity alone
Serum bilirubin alone
Adult cardiovascular risk score
Hearing threshold alone
Serial growth and developmental assessment
Correct Answer: Serial growth and developmental assessment
Chronic renal disease can impair nutrition, growth and development, making longitudinal pediatric assessment essential.
MCQ 20
A child with renal dysfunction has abnormal creatinine, electrolyte disturbance and reduced urine output after a serious systemic illness. What is the best way to interpret these findings?
Use the creatinine value alone to determine the cause
Assume CKD because renal function is abnormal
Integrate renal investigations with hydration, perfusion and clinical context
Ignore urine output once blood tests are available
Begin renal replacement therapy solely because creatinine is elevated
Correct Answer: Integrate renal investigations with hydration, perfusion and clinical context
Renal data are meaningful only when interpreted with clinical volume status, perfusion, urine output and the underlying illness.