WorksheetsPage 1
Total questions: 140
Worksheet time: 1hrs 10mins
In essential hypertension, the renal pressure–natriuresis curve shifts rightward. What is the immediate functional consequence of this shift?
Higher arterial pressures are required to achieve the same sodium excretion
Cardiac output reduction lessens compensatory natriuresis need
Peripheral vascular resistance falls to prevent pressure-induced renal injury
Kidneys excrete sodium adequately at lower arterial pressures
A 68-year-old man with atherosclerosis has critical stenosis of the right renal artery. Despite a structurally normal left kidney, he develops severe resistant hypertension. What is the most appropriate physiological explanation?
Stenosis completely blocks glomerular filtration in both kidneys increasing plasma volume
Unilateral low renal flow triggers massive renin release sustaining systemic RAAS
The affected kidney produces less renin because hypoperfusion reduces natriuresis
The normal kidney reduces sodium excretion from systemic pressure rise
A patient with an aldosterone-producing adenoma has hypertension, muscle weakness, and metabolic alkalosis. What key mechanism explains this presentation?
RAAS activation with high renin stimulating aldosterone secretion
Autonomous aldosterone elevating sodium reabsorption and potassium excretion
Intravascular volume loss from renal sodium wasting raising peripheral resistance
Renal prostaglandin increase boosting tubular flow and potassium loss
A 68-year-old man presents with clinic blood pressure of 194/112 mmHg, asymptomatic, with no acute target-organ damage. According to AHA 2025 guidance, what is the initial management?
Immediate intravenous nitroprusside administration
Begin oral combination therapy and close follow-up within days
Urgent ICU admission for arterial line monitoring
High-dose loop diuretic for rapid volume reduction
Which change best describes the pressure–natriuresis relationship in essential hypertension?
Rightward shift requiring higher pressures for natriuresis
No shift because natriuresis is pressure independent
Leftward shift with increased sodium sensitivity
Vertical upward shift indicating higher sodium excretion at any pressure
Unilateral renal artery stenosis most often leads to which endocrine profile?
Low renin, low aldosterone, metabolic acidosis
High renin, high aldosterone, hypokalemia
High renin, low aldosterone, hyponatremia
Normal renin, high aldosterone, hyperkalemia
Primary aldosteronism typically produces which electrolyte and acid–base pattern?
Hyperkalemia with metabolic acidosis
Normokalemia with respiratory alkalosis
Hypernatremia with metabolic acidosis
Hypokalemia with metabolic alkalosis
In hypertensive emergencies, which finding mandates immediate IV antihypertensive therapy rather than outpatient management?
Severely elevated blood pressure without symptoms
Acute pulmonary edema with dyspnea and hypoxia
Stable chronic kidney disease stage 3
Age over 65 with isolated systolic hypertension
Which agent is most appropriate for rapid BP control in hypertensive emergency complicated by aortic dissection?
Hydralazine IM given in clinic
Immediate-release nifedipine monotherapy
Intravenous labetalol with prompt beta-blockade
Oral ACE inhibitor titrated over days
In primary aldosteronism, why does metabolic alkalosis occur?
Renin lowers bicarbonate reabsorption in proximal tubule
Sodium wasting raises bicarbonate generation systemically
Aldosterone increases hydrogen secretion in collecting ducts
Prostaglandins inhibit distal H+ secretion causing alkalosis
Un paciente de 55 años presenta PA 150/92 mmHg en mediciones repetidas, sin comorbilidades. Según las guías AHA, ¿cuál es el manejo inicial recomendado?
Reducir la PA a <140/90 mmHg en la primera hora
Iniciar o intensificar antihipertensivo oral y reducir la PA gradualmente en 24–48 h
Pedir TAC de cráneo y enviarlo a emergencias siempre
Suspender todo antihipertensivo y observar 7 días
Un paciente recibe tres fármacos a dosis óptimas: un IECA, un calcioantagonista y clortalidona. Su PA continúa en 156/94 mmHg. Según AHA 2025, ¿cuál es el siguiente paso terapéutico recomendado?
Añadir espironolactona
Iniciar hidralazina
Añadir un betabloqueador
Sustituir clortalidona por hidroclorotiazida
Paciente de 72 años con hipertensión grado 2 y ERC estadio 3b. Está con losartán 100 mg/día y amlodipino 10 mg/día, PA aún en 152/88 mmHg. Según AHA 2025, ¿cuál es el siguiente paso terapéutico más adecuado?
Iniciar espironolactona en dosis bajas
Añadir diurético de asa por la función renal
Cambiar losartán por un betabloqueador
Añadir diurético tiazídico (clortalidona)
Un paciente de 72 años con enfermedad renal crónica estadio 3a presenta hipertensión persistente pese a IECA y calcioantagonista, con hiperactividad del sistema renina–angiotensina–aldosterona. ¿Qué mecanismo contribuye de forma más directa al mantenimiento de la hipertensión?
Disminución del retorno venoso por vasodilatación sistémica
Aumento de la reabsorción tubular de sodio mediada por aldosterona
Inhibición de la secreción de ADH por sobrecarga de volumen
Reducción del volumen plasmático por vasoconstricción renal
¿Cuál es el objetivo de reducir la PA gradualmente en 24–48 horas en hipertensión sin emergencia?
Evitar taquifilaxia a los betabloqueadores
Acelerar la diuresis forzada inmediata
Facilitar la retirada rápida del IECA
Prevenir hipoperfusión cerebral y renal
En terapia antihipertensiva resistente con IECA, calcioantagonista y tiazida, ¿por qué la espironolactona es preferida como cuarto fármaco?
Antagoniza aldosterona y reduce reabsorción de sodio
Aumenta vasodilatación cerebral selectiva profunda
Estimula liberación de renina pancreática primaria
Bloquea receptores alfa-1 de forma irreversible
En ERC estadio 3b, ¿por qué se prefiere un diurético de asa frente a una tiazida para control de PA?
Incremento de síntesis de bradicinina
Efecto directo sobre receptores AT1
Menor riesgo de hipokalemia severa
Mayor eficacia con TFG reducida
Al cambiar clortalidona por hidroclorotiazida en hipertensión resistente, ¿qué efecto es más probable?
Mejoría sustancial de PA sostenida
Aumento marcado de función renal
Corrección inmediata de hiponatremia
Reducción similar o menor de PA
En el contexto de RAAS hiperactivo, ¿qué cambio fisiológico esperas tras iniciar un antagonista de aldosterona?
Disminución de reabsorción de sodio en túbulo colector
Aumento del tono simpático periférico sostenido
Incremento de vasoconstricción glomerular severa
Potenciación de secreción de ADH central
Para un paciente sin signos de daño a órgano diana y PA 150/92 mmHg, ¿qué conducta se debe evitar?
Derivar a emergencias para TAC de cráneo
Ajustar tratamiento y reducir PA en 24–48 horas
Iniciar antihipertensivo oral con seguimiento cercano
Educar sobre adherencia y monitoreo domiciliario
For an adult with newly diagnosed hypertension and no compelling indications, what is the recommended initial management strategy?
Start beta‑blocker monotherapy immediately
Only lifestyle changes without medications
Begin one or two antihypertensives plus lifestyle changes
Wait six months and reassess without therapy
Which antihypertensive drug class is NOT considered first‑line therapy in adults?
Thiazide diuretics as foundational agents
ACE inhibitors for renin‑angiotensin blockade
Angiotensin receptor blockers for RAAS modulation
Beta‑blockers as routine initial therapy
What blood pressure target is recommended for most treated adults according to AHA guidance?
Less than 120/70 mmHg universally
Less than 130/80 mmHg routinely
Less than 140/90 mmHg consistently
Less than 150/90 mmHg overall
Choose the statement that correctly distinguishes persistent from refractory hypertension.
Persistent remains high on two drugs; refractory requires three including a diuretic
Persistent due to poor adherence; refractory always has secondary cause
Persistent elevated only in clinic; refractory elevated outside clinic
Persistent misses goals despite three drugs; refractory despite five including thiazide and aldosterone antagonist
A patient presents with elevated office blood pressures. What is the first step in diagnostic evaluation?
Schedule a treadmill stress test
Confirm elevation with repeated measures and ambulatory or home monitoring
Start immediate pharmacologic treatment
Order renal imaging studies promptly
In older adults or those with eGFR around 40 mL/min, why is sacubitril/valsartan often initiated at a lower dose?
Accelerated hepatic metabolism requires adjustment
Greater risk of hypotension and renal deterioration
Higher risk of hypoglycemia in this population
Reduced clinical efficacy at standard doses
When defining refractory hypertension, which combination is specifically included at adequate doses?
Thiazide diuretic and aldosterone antagonist included
Loop diuretic and beta‑blocker combination therapy
Calcium channel blocker and ACE inhibitor only
Direct renin inhibitor with alpha‑blocker
Which step should be prioritized before labeling a patient as having persistent hypertension?
Start five medications at low doses
Confirm with multiple readings and out‑of‑office monitoring
Assess adherence but skip ambulatory monitoring
Exclude all secondary causes immediately
For most adults under treatment, what is the preferred systolic/diastolic target threshold?
Under 120/70 mmHg to maximize benefit
Under 150/90 mmHg to reduce events
Under 140/90 mmHg for simplicity
Under 130/80 mmHg for optimal control
Which statement best reflects current first‑line choices for adult hypertension therapy?
Direct renin inhibitors are universally first‑line
Beta‑blockers and alpha‑blockers are preferred initially
All classes are equally recommended to start
Thiazides, ACE inhibitors, and ARBs are first‑line; beta‑blockers are not
Which of the following is an absolute contraindication to initiating sacubitril/valsartan?
Mild hypotension (BP 95/60 mmHg)
Mild hyperkalemia
eGFR of 35 mL/min
Pregnancy
In which patient is SGLT2 inhibitor use contraindicated due to lack of efficacy and higher adverse event risk?
eGFR 80 mL/min
eGFR 32 mL/min
eGFR 55 mL/min
eGFR 18 mL/min
A patient with type 2 diabetes, eGFR 40 mL/min, and prior HFrEF is started on an SGLT2 inhibitor despite HbA1c at goal. What is the primary reason?
Increase eGFR substantially in the short term
Improve glycemic control when HbA1c is already at target
Prevent hypoglycemia during insulin therapy
Reduce heart failure hospitalizations and slow renal disease
Which statement best defines Diabetes Mellitus?
A cluster of metabolic disorders whose common feature is hyperglycemia
A condition with exclusively autoimmune and hereditary origins
A group of metabolic disorders with a hypoglycemia phenotype
An endocrine disorder only due to absolute insulin deficiency
Type 1 Diabetes Mellitus is primarily characterized by:
Glucose intolerance that typically manifests after age forty
Destruction of pancreatic beta cells causing absolute or near-total insulin deficiency
Peripheral insulin resistance and increased hepatic glucose output
For a patient with HFrEF being considered for sacubitril/valsartan, which lab abnormality would most strongly caution against initiation?
Severe hyperkalemia with ECG changes
Mild hyponatremia without symptoms
Borderline low blood pressure, asymptomatic
Slightly elevated creatinine above baseline
Which eGFR threshold most commonly signals reduced glycemic efficacy of SGLT2 inhibitors while cardio-renal benefits may persist?
Near 30 mL/min/1.73 m²
Below 20 mL/min/1.73 m²
Around 45 mL/min/1.73 m²
Above 60 mL/min/1.73 m²
In T2DM with established HFrEF and CKD stage 3b, what outcome shows the most consistent benefit from SGLT2 inhibitors?
Rapid HbA1c reduction over three months
Increase in insulin secretion from beta cells
Fewer heart failure hospitalizations and slower CKD progression
Normalization of blood pressure within days
Which pathophysiologic feature distinguishes Type 1 from Type 2 Diabetes Mellitus?
Genetic monogenic defects of insulin receptor signaling
Isolated hepatic insulin resistance with normal beta cells
Primary insulin resistance with compensatory hyperinsulinemia
Autoimmune beta-cell destruction leading to absolute insulin deficiency
A 28-year-old with new-onset hyperglycemia, low C-peptide, and positive GAD antibodies most likely has:
Maturity-onset diabetes of the young with receptor mutation
Type 1 Diabetes Mellitus due to autoimmune beta-cell loss
Stress hyperglycemia from acute illness only
Type 2 Diabetes Mellitus with insulin resistance
Type 2 diabetes is best characterized by which pathophysiologic pattern?
Exclusive lipid metabolism defect
Permanent hypersecretion of insulin
Insulin resistance with lower secretion
Absolute insulin deficiency early
For most adults with type 2 diabetes, what HbA1c goal is generally recommended when hypoglycemia risk is low?
Less than 5.5 percent
Less than 6.0 percent universally
Less than 7.0 percent if low risk
Less than 8.5 percent always
In patients with diabetes, which blood pressure target is commonly recommended by current guidelines?
Below 150 over 90 mmHg
Below 120 over 70 mmHg
Below 140 over 90 mmHg
Below 130 over 80 mmHg
An adult with type 2 diabetes and high cardiovascular risk should aim for what LDL-cholesterol level?
Under 130 mg/dL
Under 100 mg/dL
Under 70 mg/dL
Under 55 mg/dL
Which medication class for type 2 diabetes reduces risk of heart failure and slows kidney disease progression, beyond glycemic control?
Metformin therapy
DPP-4 inhibitors
SGLT2 inhibitors
Sulfonylureas
Which feature distinguishes type 2 diabetes from type 1 in early disease?
Ketosis-prone presentation
Insulin resistance predominating
Autoimmune beta-cell destruction
Complete insulin absence early
Selecting HbA1c targets requires balancing benefits and risks. Which option reflects individualized care when hypoglycemia risk is high?
Fixed target below 5.5 percent
Relaxed target due to risk
Universal target below 7 percent
Aggressive target below 6 percent
For a 62-year-old with diabetes and albuminuria, which blood pressure goal aligns with guideline-based cardiovascular protection?
Below 135 over 85 mmHg
Below 130 over 80 mmHg
Below 150 over 90 mmHg
Below 140 over 90 mmHg
A patient’s LDL is 82 mg/dL with high ASCVD risk. What is the next best step regarding lipid lowering?
No change, already optimal
Aim for less than 100 mg/dL
Target under 130 mg/dL
Intensify to under 70 mg/dL
Among common glucose-lowering agents, which option offers cardiorenal benefits independent of HbA1c reduction?
Metformin monotherapy
Short-acting insulin
DPP-4 inhibitor therapy
SGLT2 inhibitor therapy
Which class of antidiabetic drugs is referred to as "gliflozins" and acts by inhibiting renal glucose reabsorption?
Inhibitors SGLT2 called gliflozins
Thiazolidinediones activate PPAR-γ
DPP-4 inhibitors prolong incretins
Sulfonylureas increase insulin release
A newly diagnosed type 2 diabetes patient with HbA1c of 9.2% needs initial therapy. What is the most recommended first step?
Begin metformin as monotherapy
Initiate dual therapy with metformin plus drug
Start basal insulin immediately
Start lifestyle modification alone
In a patient with type 2 diabetes, obesity, and heart failure with reduced ejection fraction, adding an SGLT2 inhibitor provides which main physiological benefit?
Improve skeletal muscle insulin sensitivity
Reduce proximal glucose–sodium reabsorption lowering preload
Increase pancreatic insulin secretion
Raise sodium reabsorption to prevent hypovolemia
What is the principal determinant of the glomerular filtration rate (GFR)?
Glomerular hydrostatic pressure
Plasma sodium concentration
Tubular permeability
Renal sympathetic activity
Systemic arterial pressure rise does not significantly increase GFR primarily because which mechanism buffers glomerular perfusion?
Enhanced proximal tubular sodium uptake
Myogenic response of afferent arteriole
Activation of sympathetic vasoconstriction
Increased ADH secretion centrally
For an adult with HbA1c 9.2%, why is basal insulin not typically initiated as the very first step?
Risk of acute diabetic ketoacidosis
Insulin always worsens heart failure
Dual therapy achieves glycemic targets safely
Metformin is contraindicated in obesity
Which statement best explains SGLT2 inhibitors’ benefit in heart failure beyond glycemic control?
They expand plasma volume reducing afterload
They activate RAAS improving contractility
They induce osmotic diuresis reducing preload
They increase insulin secretion causing diuresis
Choose the factor most directly increasing GFR when all else is constant.
Higher efferent arteriolar tone
Higher glomerular capillary hydrostatic pressure
Greater Bowman’s space hydrostatic pressure
Lower glomerular capillary hydrostatic pressure
Which intervention most selectively lowers proximal tubular glucose transport in diabetes?
Insulin analogs downregulate GLUT4 trafficking
Metformin enhances hepatic AMPK
SGLT2 inhibition blocks glucose–sodium cotransport
Sulfonylureas open KATP channels in β-cells
When renal sympathetic activity rises acutely, what is the expected immediate effect on GFR?
Increase via proximal sodium reabsorption
Increase due to efferent dilation
Decrease via afferent vasoconstriction
No change due to tubuloglomerular feedback
Which statement best describes renal autoregulation of blood flow?
It lowers filtration by constricting both arterioles
It rapidly increases flow during sympathetic surges
It keeps renal flow relatively constant across ranges
It fully prevents pressure changes at all times
Which factor most directly decreases the glomerular filtration rate (GFR)?
Higher Bowman’s space hydrostatic pressure
Lower plasma colloid osmotic pressure
Constriction of the efferent arteriole
Dilation of the afferent arteriole
Angiotensin II primarily affects which renal microvascular segment to alter filtration?
Efferent arteriole constriction predominates
Afferent arteriole dilation predominates
Peritubular capillary vasodilation predominates
Glomerular capillary relaxation predominates
Which change would most likely increase GFR in a healthy kidney?
Higher plasma oncotic pressure
Reduced afferent resistance only
Lower Bowman’s space pressure
Stronger efferent constriction only
A patient with acute urinary obstruction develops reduced GFR. What mechanism explains this?
Enhanced autoregulation eliminating pressure changes
Increased Bowman’s space hydrostatic pressure
Decreased renal blood flow from afferent dilation
Lower plasma protein concentration raising oncotic pressure
Which constitutional symptom profile is common at the onset of systemic lupus erythematosus (SLE)?
Persistent hyperthermia without variation
Severe hypertension at initial presentation
Weight loss with intermittent fever
Profuse night sweats due to tuberculosis
For most patients with SLE without severe organ involvement, which maintenance therapy is recommended?
Prednisone 40 mg daily chronically
Azathioprine as first-line monotherapy
Hydroxychloroquine for long-term control
Cyclophosphamide for routine suppression
Which immediate effect follows inhibition of the renin–angiotensin–aldosterone system in a euvolemic person?
Efferent arteriolar dilation may lower GFR
Afferent arteriolar dilation increases GFR
Bowman’s pressure falls and GFR rises
Autoregulation fully stabilizes renal blood flow
During sympathetic activation, which reflex change is most likely in the renal arterioles to preserve filtration?
Reflex afferent dilation predominates
Reflex afferent constriction predominates
Reflex efferent dilation predominates
Reflex efferent constriction predominates
A patient with suspected lupus presents with intermittent fever and weight loss. Which next step best balances diagnostic yield and safety?
Begin cyclophosphamide immediately
Schedule renal biopsy before labs
Order ANA and anti-dsDNA testing
Start high-dose prednisone empirically
Which pulmonary complication occurs most frequently in patients with systemic lupus erythematosus (SLE)?
Derrame pleural
Sarcoidosis
Embolia pulmonar masiva
Fibrosis pulmonar idiopática
A 28-year-old with SLE has anemia, elevated indirect bilirubin, and high LDH. Which test best confirms autoimmune hemolytic anemia?
Perfil tiroideo
Conteo de plaquetas
Glucosa capilar
Prueba de Coombs directa
A 30-year-old woman with SLE shows low C3 and C4, moderate proteinuria, and granular casts. Which immunologic mechanism best explains the renal lesion?
Activación del complemento por inmunocomplejos glomerulares
Destrucción de podocitos por linfocitos CD8+
Depósito de cristales de urato con inflamación renal
Reabsorción tubular aumentada por anticuerpos antifosfolípidos
What is the main advantage of finerenone over steroidal mineralocorticoid receptor antagonists in patients with type 2 diabetes and chronic kidney disease?
Mayor selectividad y menor hiperpotasemia manteniendo efecto cardiorrenal
Aumento de TFG por vasodilatación eferente
Inhibición directa de la síntesis de aldosterona
Estimulación de ENaC para excreción de potasio
Which statement most accurately summarizes clinical benefits of SGLT-2 inhibitors beyond glycemic control?
Reducción de eventos cardiorrenales y progresión de ERC
Mejora exclusiva de la sensibilidad a la insulina
Disminución de LDL como principal beneficio
Aumento sostenido de la TFG sin efectos renales
In SLE-related autoimmune hemolytic anemia, which laboratory pattern typically accompanies a positive direct Coombs test?
Haptoglobina elevada con reticulocitos bajos
Hemoglobina normal con plaquetas altas
Bilirrubina indirecta alta con LDH elevada
Bilirrubina indirecta baja con LDH normal
For SLE nephritis with low complement levels, which pathologic finding is most consistent on urinalysis?
Cilindros hialinos con glucosuria
Cilindros granulosos con proteinuria moderada
Cristales de urato sin proteinuria
Hematuria aislada sin cilindros
Which mechanism explains the lower hyperkalemia risk with finerenone compared to spironolactone?
Bloqueo de síntesis de aldosterona sistémica
Vasodilatación eferente del glomérulo
Mayor selectividad por el receptor mineralocorticoide
Inhibición de ENaC en túbulos colectores
In patients with SGLT-2 inhibitor therapy, which kidney effect contributes to cardio-renal protection?
Retención de sodio en túbulo proximal
Estimulación de renina con vasoconstricción aferente
Aumento sostenido de TFG por vasodilatación
Reducción de hiperfiltración por natriuresis
Which imaging or clinical sign is most consistent with the most common SLE pulmonary complication?
Nódulos hilar con adenopatías sarcoideas
Émbolos masivos en arterias pulmonares
Opacidades difusas compatibles con fibrosis
Derrame pleural visible en radiografía
Which statement best describes the non-glycemic benefits of SGLT2 inhibitors in adults with diabetes?
Lower weight and blood pressure, reduce heart failure hospitalizations
Reduce HbA1c modestly without cardiovascular or renal benefits
Increase natriuresis, raise hypoglycemia risk, third-line only
Improve GFR dose-dependently only in poorly controlled diabetes
In advanced chronic kidney disease (eGFR 15–29 mL/min/1.73 m²), starting an ACE inhibitor or ARB is most associated with which outcome?
Lower risk of progressing to renal replacement therapy
Higher likelihood of requiring dialysis due to hyperkalemia
Marked reduction in all-cause mortality
Stopping therapy leads to improved renal function
What is the defining feature of hemodiafiltration compared with using diffusion or convection alone?
Uses diffusion alone to clear uremic solutes
Combines diffusion and convection for broad solute removal
Does not require a semipermeable membrane
Removes water only, not solutes
In clinical practice, hemofiltration is most commonly chosen over hemodialysis in which scenario?
Complete replacement of hepatic function
Routine outpatient dialysis three times weekly
Patients with normal renal function
Acute kidney injury in intensive care settings
Which primary transport mechanism removes solutes during standard hemodialysis?
Ultrafiltration without solute movement
Diffusion across the membrane
Active transport via pumps
Convection across the membrane
A patient with heart failure and type 2 diabetes is started on an SGLT2 inhibitor. Which benefit is most consistently supported by trials regardless of HbA1c level?
Dramatic improvements in measured GFR
Reduced hospitalizations for heart failure events
Large mortality reduction in all populations
Elimination of hyperglycemia-related risks
Why is hemofiltration frequently used in the ICU for patients with acute kidney injury?
It allows continuous therapy with better hemodynamic stability
It requires no membrane and is technically simpler
It is superior for clearing only small molecules
It fully replaces hepatic detoxification processes
Which statement about natriuresis and hypoglycemia risk aligns with recommendations for SGLT2 inhibitors?
They modestly lower HbA1c without renal or cardiac gains
They markedly increase hypoglycemia and mortality; third-line only
They increase natriuresis yet are avoided due to hypotension
They improve survival in some trials independent of HbA1c
Which modality relies predominantly on convection to remove solutes of varying sizes?
Standard intermittent hemodialysis
Hemodiafiltration with high-flux dialyzers
Pure hemofiltration techniques
Peritoneal dialysis via diffusion
A clinician aims to improve clearance of middle molecules while maintaining diffusive removal of small solutes. Which modality best meets this goal?
Hemofiltration alone
Intermittent hemodialysis alone
Hemodiafiltration combining mechanisms
Slow continuous ultrafiltration without dialysate
Which statement best defines when to initiate dialysis solely on renal function without symptoms?
When GFR is less than or equal to 20 mL/min
Only when symptoms appear regardless of GFR
When GFR is less than or equal to 10 mL/min
When GFR is less than or equal to 30 mL/min
Which option correctly includes all classic clinical indications to start dialysis?
Mild acidosis, hypocalcemia, insomnia, oliguria, pressure ulcers
Anemia, edema, skin infections, oxaluria, obstructive uropathy
Refractory acidosis, severe electrolyte disorders, intoxications, volume overload not responsive to diuretics, and uremia
Acidosis, mild edema, urinary infections, mild oliguria, uremia
Which is an absolute contraindication to using ACE inhibitors?
Bilateral renal artery stenosis
Dyslipidemia
Diabetes mellitus
Grade 1 arterial hypertension
Carbonic anhydrase inhibitors like acetazolamide act primarily at which nephron segment?
Proximal tubule
Distal convoluted tubule
Collecting duct
Thick ascending limb of Henle
A 29-year-old woman has bilateral lumbar pain, macroscopic hematuria, occasional headaches, and elevated blood pressure. Her mother required dialysis at 52 for hereditary renal disease. On exam, palpable renal masses, afebrile, no urinary symptoms. Which initial exam group is most appropriate for suspected autosomal dominant polycystic kidney disease?
Renal ultrasound + serum creatinine + urinalysis
Plain abdominal radiograph + urine culture + electrolytes
Non-contrast abdominal CT + contrast abdominal CT
Renal biopsy + magnetic resonance imaging
In a patient with suspected polycystic kidney disease and hypertension, which mechanism explains why ACE inhibitors are often beneficial unless contraindicated?
They stimulate proximal bicarbonate reabsorption
They directly dissolve renal cyst walls
They decrease efferent arteriolar resistance lowering intraglomerular pressure
They increase efferent arteriolar constriction reducing GFR
Which situation most strongly suggests urgent dialysis rather than continued medical management?
Mild hyperkalemia responsive to diuretics
Volume overload not improving with diuretics
Stable anemia with normal electrolytes
Asymptomatic GFR of 25 mL/min
Which adverse effect risk makes ACE inhibitors unsafe in bilateral renal artery stenosis?
Metabolic alkalosis from bicarbonate loss
Acute drop in GFR from decreased efferent tone
Hyperfiltration due to increased efferent tone
Ototoxicity from tubular injury
Acetazolamide decreases bicarbonate reabsorption. Which acid–base change is most typical early after starting acetazolamide?
Metabolic alkalosis with high bicarbonate
Metabolic acidosis with low bicarbonate
Respiratory acidosis with high CO2
Respiratory alkalosis with low CO2
A patient with known autosomal dominant polycystic kidney disease presents with high fever, chills, and severe flank pain. Which complication is most likely?
Minimal change disease nephrotic syndrome
Nephrolithiasis with spontaneous resolution
Renal cyst infection requiring antibiotics
Simple renal cyst rupture with no therapy
A patient with sudden right flank pain, hypotension, fever, and confusion is suspected of septic shock due to ruptured renal cyst. What is the most important initial management step?
Start broad-spectrum IV antibiotics within first hour
Request renal injury biomarkers prior to therapy
Order contrast-enhanced abdominal CT before treatment
Give NSAIDs and observe clinical evolution
Which statement best describes the key feature of autosomal dominant polycystic kidney disease?
Progressive formation of multiple renal cysts from ciliopathy
No familial relation and not considered chronic kidney disease
Lifelong small cysts with normal-sized kidneys
Acquired disorder seen only in older adults
A 55-year-old with polycystic kidneys develops gross hematuria after intense exercise, afebrile, bilateral renal masses on exam. What is the most likely cause of hematuria?
Renal tumor associated with advanced cystic disease
Acute pyelonephritis complicating cyst infection
Rupture of a renal cyst with intrarenal bleeding
Obstructive renal stone due to hyperuricosuria
A patient with active SLE has proteinuria, edema, progressive dyspnea, and a pericardial friction rub. What is the most frequent cardiac complication of SLE explaining this finding?
Acute pericarditis from autoimmune serositis
Bacterial endocarditis due to immunosuppression
Lupus myocarditis with fulminant heart failure
Mitral stenosis from chronic valvular fibrosis
In suspected septic shock from intra-abdominal source, which timing for antibiotics most reduces mortality?
Within the first hour of recognition
After initial NSAID analgesia
After imaging confirms the source
Only if cultures return positive
Autosomal dominant polycystic kidney disease primarily results from defects in which cellular structure?
Mitochondrial inner membrane complexes
Primary cilia signaling mechanisms
Nuclear pore transport channels
Lysosomal acid hydrolase systems
During evaluation of gross hematuria in polycystic kidneys after exertion, which immediate complication most closely aligns with the presentation?
Glomerulonephritis with RBC casts predominance
Papillary necrosis causing flank tenderness
Cyst rupture leading to intrarenal bleeding
Obstructive stone with colicky flank pain
In SLE, which physical exam finding most strongly supports pericarditis as the cause of chest symptoms?
Fixed split S2 without rub
Pericardial friction rub on auscultation
S3 gallop with displaced apex beat
Harsh systolic murmur at upper sternal border
Which imaging choice is least appropriate before initiating treatment in hemodynamically unstable suspected ruptured renal cyst with sepsis?
Urgent contrast CT of abdomen and pelvis
Point-of-care ultrasound for free fluid
Plain abdominal radiograph assessment
No immediate imaging, prioritize antibiotics
Which hereditary pattern characterizes polycystic kidney disease discussed, often affecting multiple family members across generations?
X-linked dominant transmission
Autosomal dominant inheritance pattern
Mitochondrial maternal inheritance
Autosomal recessive inheritance pattern
A 24-year-old woman presents with fatigue, intermittent low-grade fever, and non-erosive joint pain in hands and knees. Exam shows malar erythema. Labs: ANA 1:320 positive, anti-dsDNA positive, low C3-C4, no proteinuria or hematologic changes. According to EULAR/ACR 2023, what is the next best step to confirm systemic lupus erythematosus?
Repeat ANA in 6 months due to insufficient criteria
Mandatory renal biopsy to classify SLE per guidelines
Confirm SLE as cumulative immunologic and clinical criteria exceed threshold
Confirm SLE because ANA positivity establishes diagnosis
For most adults with diabetes, what HbA1c target is recommended by ADA?
Less than 8 percent
Less than 7 percent
Less than 6 percent
Less than 5.7 percent
According to ADA guidance, what is the first-line pharmacologic therapy for type 2 diabetes in most patients unless contraindicated?
SGLT2 inhibitors as initial therapy
Metformin as initial therapy
GLP-1 receptor agonists as initial therapy
Sulfonylureas as initial therapy
Which annual screening test is recommended for diabetic kidney disease in patients with type 2 diabetes?
Twenty-four hour urine creatinine clearance
Serum potassium level measurement
Urine albumin-to-creatinine ratio (ACR)
Renal biopsy for early detection
A 60-year-old man with type 2 diabetes and prior myocardial infarction one year ago is on metformin and glybenclamide. HbA1c is 7.4% with normal renal function. What change is prioritized per ADA?
Initiate basal insulin therapy
Add pioglitazone to regimen
Replace sulfonylurea with an SGLT2 inhibitor
Increase metformin dosage
Low complement levels (C3 and C4) in a patient with suspected lupus most directly indicate which process?
Reduced hepatic synthesis without immune activation
Complement activation solely via lectin pathway
Immune complex formation with complement consumption
Isolated genetic deficiency of complement proteins
In evaluating suspected lupus, why is a positive anti-dsDNA result clinically significant?
It rules out renal involvement completely
It replaces the need for ANA testing entirely
It supports diagnosis and correlates with disease activity
It indicates infection with double-stranded viruses
For a patient with diabetes and established atherosclerotic cardiovascular disease, which drug class offers proven cardiovascular benefit beyond glycemic control?
DPP-4 inhibitors without CV effects
Thiazolidinediones increase heart failure risk
SGLT2 inhibitors reduce major CV events
Alpha-glucosidase inhibitors improve lipid profile
When screening for diabetic nephropathy, what does the urine albumin-to-creatinine ratio primarily detect?
Prerenal azotemia from dehydration
Early glomerular microalbuminuria
Advanced nephrotic-range proteinuria
Tubular sodium handling abnormalities
In an adult with HbA1c 7.4% on metformin and sulfonylurea, normal renal function, and prior MI, what rationale supports switching to an SGLT2 inhibitor?
Superior hypoglycemia risk compared with sulfonylurea
Provides cardiovascular and renal protection benefits
Increases insulin secretion independent of glucose
Primary effect is significant weight gain in all patients
A 44-year-old patient with type 2 diabetes, hypertension, and microalbuminuria is on metformin and lisinopril. HbA1c is 7.0%, eGFR 58 mL/min, BP 138/86. Which intervention provides additional renal protection per ADA guidance?
Initiate basal insulin therapy
Switch to a different ACE inhibitor
Start an SGLT2 inhibitor
Increase metformin to maximum dose
In a patient with end-stage renal disease and uremic symptoms who is about to begin renal replacement therapy, what advantage does hemodiafiltration offer compared with conventional hemodialysis?
Greater removal of large solutes via diffusion plus convection
Rapid volume reduction without hypotension risk
Exclusive removal of small molecules by chemical gradient
Reduced need for permanent vascular access
A patient with congestive heart failure receives oral furosemide 40 mg every 12 hours to relieve edema. What is the primary site and mechanism of action of this drug?
Inhibit Na+/Cl− cotransporter in distal convoluted tubule
Block epithelial sodium channel in collecting duct
Inhibit Na+/K+/2Cl− cotransporter in thick ascending limb
Inhibit carbonic anhydrase in proximal tubule
During prolonged furosemide therapy, a patient develops muscle weakness and arrhythmias. Which electrolyte disturbance most likely explains this?
Hyponatremia
Hypocalcemia
Hyperkalemia
Hypokalemia
Which mechanism best explains why SGLT2 inhibitors confer renal protection in diabetic kidney disease?
Decrease intraglomerular pressure via tubuloglomerular feedback
Direct mesangial proliferation inhibition by receptor blockade
Enhanced insulin secretion from pancreatic beta cells
Upregulation of proximal tubular sodium reabsorption
Hemodiafiltration improves clearance of middle molecules. Which clinical marker best reflects this improvement?
Increased anion gap after dialysis completion
Reduced bicarbonate buffering during treatment
Higher serum creatinine immediately after session
Lower beta-2 microglobulin levels post-treatment
Loop diuretics like furosemide increase urinary excretion of several electrolytes. Which combination is most characteristic?
Increased Na+ with decreased Ca2+ excretion
Decreased Na+ with increased K+ excretion
Decreased Na+, K+, Mg2+ excretion
Increased Na+, K+, Ca2+ excretion
Which adverse effect risk increases when furosemide is combined with other ototoxic agents such as aminoglycosides?
Gastrointestinal bleeding
Central visual scotomas
Peripheral neuropathy
Sensorineural hearing loss
For a patient with heart failure and persistent edema despite furosemide, which strategy best augments diuresis while limiting potassium loss?
Add spironolactone as an adjunct
Add a thiazide diuretic sequentially
Reduce loop diuretic dose gradually
Switch to acetazolamide monotherapy
Which finding suggests overdiuresis with loop diuretics requiring dose adjustment?
Hypertension with low urine output and edema
Bradycardia with normal electrolytes and creatinine
Hyperglycemia with stable volume status
Orthostatic hypotension with elevated BUN/creatinine ratio
Which component of evidence-based practice focuses on integrating patient preferences into care decisions?
Quality improvement metrics
Population-level policy
Patient values incorporation
Clinical expertise application
In clinical research, what is the primary purpose of a randomized controlled trial?
Identify rare adverse events
Generate exploratory hypotheses
Establish causal relationships
Describe population prevalence
Which step comes first when appraising a journal article for clinical relevance?
Assess external validity
Check for publication bias
Determine study question
Evaluate statistical methods
Which metric best represents the proportion of true positives among all positive test results?
Negative predictive value
Positive predictive value
Sensitivity of the test
Specificity of the test
For a screening program, which characteristic is most important for a disease suitable for screening?
Low incidence worldwide
Long preclinical phase
Complex diagnostic pathway
High treatment toxicity
A new antihypertensive shows a number needed to treat (NNT) of 25. What does this indicate?
One event prevented per 25 treated
Twenty-five events prevented overall
High absolute risk reduction magnitude
Minimal adverse event likelihood
Which bias occurs when participants lost to follow-up differ systematically from those retained?
Lead-time bias in screening
Observer bias in trials
Attrition bias in cohorts
Recall bias in surveys
When comparing diagnostic tests, which approach appropriately adjusts for disease prevalence differences?
Use raw positive counts
Use positive predictive value
Use mean likelihood ratios
Use sensitivity and specificity
A patient prioritizes functional status over survival duration. Which outcome measure aligns with this preference?
Biomarker level normalization
Disease-free survival time
Quality-adjusted life years
Overall mortality reduction
Which strategy most effectively reduces confounding in observational studies?
Convenience sampling only
Randomization of exposure
Multivariable regression modeling
Open-label study design
