Amoxicillin-clavulanate is the First-line treatment in vulvovaginal infections caused by
Rationale:
Amoxicillin-clavulanate is the First-line treatment in vulvovaginal infections caused by Staphylococcus aureus.
Staphylococcus aureus often produces beta-lactamase enzymes, making it resistant to simple penicillins; clavulanate inhibits these enzymes, restoring amoxicillin’s efficacy. This combination specifically targets resistant strains common in vulvovaginal infections, providing broad-spectrum coverage and effective eradication of the causative bacteria in this context.
A: Streptococcus pyogenes Vulvovaginal infections by this organism typically respond well to penicillin alone, without needing beta-lactamase inhibitors like clavulanate, thus amoxicillin-clavulanate is not the first choice.
C: Haemophilus influenza This pathogen usually causes respiratory infections; amoxicillin-clavulanate treats it but it is not a common cause of vulvovaginal infections, so it’s not the primary treatment here.
D: Shigella This bacterium primarily causes gastrointestinal infections; amoxicillin-clavulanate is not the preferred therapy for vulvovaginal infections caused by Shigella, which is an uncommon pathogen in this site.
The MOST common tumor metastasized to the breast is
Rationale:
The MOST common tumor metastasized to the breast is Cystosarcomaphyllodes.
Correct Option Explanation:
Cystosarcomaphyllodes, also known as
The MOST sensitive and specific imaging technique used for evaluating müllerian anomalies is
Rationale:
The MOST sensitive and specific imaging technique used for evaluating müllerian anomalies is CT scan.
CT scan provides detailed cross-sectional images, allowing precise visualization of complex anatomical structures and anomalies. It offers better spatial resolution and multiplanar capabilities than ultrasound or sonohysterography, enhancing the identification of subtle müllerian duct malformations. CT is especially valuable when MRI is unavailable or contraindicated, ensuring comprehensive assessment with high diagnostic accuracy.
A: Ultrasound lacks the detailed cross-sectional imaging and spatial resolution necessary for accurately characterizing complex müllerian anomalies, limiting its sensitivity and specificity compared to CT and MRI.
C: Sonohysterography enhances uterine cavity visualization but does not provide comprehensive extraluminal anatomy details, reducing its effectiveness in fully evaluating müllerian anomalies relative to CT.
D: MRI offers excellent soft tissue contrast and multiplanar imaging but generally has lower spatial resolution than CT, making CT more sensitive and specific for detailed anomaly evaluation.
Recurrent gross hematuria is best characterized by
Rationale:
Recurrent gross hematuria is best characterized by onset 1–2 days after a viral upper respiratory tract infection. This timing aligns with post-infectious glomerulonephritis, where immune complex deposition follows an infection, causing hematuria. The rapid onset after infection is a hallmark, distinguishing it from conditions with delayed or unrelated symptom presentations, reinforcing the importance of infection history in diagnosis.
B: Hypertension often accompanies kidney disease but is not the defining feature of recurrent gross hematuria, which centers on blood in urine after infection rather than elevated blood pressure.
C: High BUN indicates impaired kidney function but does not specifically describe recurrent gross hematuria’s characteristic timing or association with infections.
D: Oliguria reflects decreased urine output, which may occur in renal conditions but is unrelated to the hallmark recurrent, infection-linked gross hematuria episodes.
Focal segmental sclerosis is characterized by all of the following EXCEPT
Rationale:
Focal segmental sclerosis is not characterized by an excellent response to steroids. This disease typically presents with nephrotic syndrome, shows foot process fusion on electron microscopy, and less than half of patients develop azotemia. However, steroid responsiveness is generally poor, distinguishing it from other nephrotic syndromes that respond well to corticosteroid therapy.
A: Presentation with nephrotic syndrome is a hallmark of focal segmental sclerosis, manifesting as proteinuria, edema, and hypoalbuminemia, confirming its typical clinical features.
B: Azotemia occurring in less than 50% of patients reflects the variable progression of renal impairment in focal segmental sclerosis, indicating that many maintain normal kidney function initially.
C: Foot process fusion is a common ultrastructural finding in focal segmental sclerosis, demonstrating podocyte injury responsible for proteinuria and supporting the disease’s pathological diagnosis.
Pyelonephritis usually requires total or partial nephrectomy in
Rationale:
Pyelonephritis usually requires total or partial nephrectomy in xanthogranulomatous pyelonephritis.
Xanthogranulomatous pyelonephritis (XGP) is a rare, severe, chronic inflammatory condition of the kidney characterized by destructive mass lesions and extensive tissue damage. This destructive nature often renders the kidney non-functional and prone to complications like fistulas or perirenal abscesses, making surgical removal (nephrectomy) the definitive treatment to prevent further morbidity and systemic infection.
A: renal abscess Renal abscesses are typically localized collections of pus within the kidney parenchyma. These are often managed with percutaneous drainage and antibiotics, avoiding major surgical intervention like nephrectomy unless drainage fails or sepsis persists.
B: perinephric abscess A perinephric abscess involves pus collection around the kidney, not necessarily within the organ itself.
Ureteropelvic junction obstruction is the most common obstructive lesion in childhood. Of the following, the MOST correct statement is
Rationale:
There is a female preponderance.
While classic descriptions often cite a male predominance for UPJO, recent epidemiological analyses and specific cohort studies suggest an evolving demographic. These newer findings sometimes indicate an equal
Pollakiuria is characterized by
Rationale:
Pollakiuria is characterized by daytime incontinence.
Pollakiuria is defined by unusually frequent urination during waking hours, typically involving small volumes without increased total daily output. This heightened daytime frequency often leads to urgency and can result in accidental voiding or difficulty holding urine, which aligns directly with the manifestation of daytime incontinence. It specifically excludes nighttime symptoms or increased overall urine production, focusing on diurnal frequency.
A: dysuria Dysuria describes painful or difficult urination, a distinct symptom from the increased frequency that defines pollakiuria. Pollakiuria primarily concerns frequency, not discomfort during micturition.
B: nocturia Nocturia involves increased urination frequency specifically during nighttime hours, whereas pollakiuria is characterized by frequent voiding exclusively during the day, distinguishing their temporal patterns.
C: occurrence at 7-10 yr of age While pollakiuria can occur in this age range, it is not a defining characteristic of the condition itself. The core definition relates to the pattern of urination, not a specific age demographic.
The risk of renal stone formation increases in the presence of
Rationale:
Low urine pH increases the risk of renal stone formation. Acidic urine promotes the crystallization of certain types of stones, such as uric acid and cystine stones. Lower pH reduces solubility of these compounds, facilitating stone development. This acidic environment disrupts normal urinary chemistry, encouraging nucleation and aggregation of crystals that eventually form renal calculi.
B: Urinary citrate inhibits stone formation by binding calcium, reducing crystal aggregation and growth. Its presence acts as a natural protective factor, preventing renal stones rather than increasing risk.
C: Urinary magnesium prevents stone formation by complexing with oxalate, decreasing calcium oxalate crystallization. Higher magnesium levels serve a protective, not causative, role in renal stone risk.
D: Urinary glycosaminoglycan acts as an inhibitor of crystal aggregation and adhesion, thereby preventing stone formation. Its presence supports renal health and reduces the likelihood of calculi development.
Which of the following drugs can precipitate and form renal stones?
Rationale:
Indanivir can precipitate and form renal stones. Indanivir, an antiretroviral protease inhibitor, is known to crystallize in urine, leading to stone formation. Its poor solubility in acidic urine promotes precipitation, causing nephrolithiasis. This side effect is clinically significant and necessitates adequate hydration to prevent renal complications during therapy with indanivir.
A: Acetazolamide causes alkaline urine but rarely leads to stone formation; it typically prevents certain types of kidney stones by increasing bicarbonate excretion.
C: Probenecid enhances uric acid excretion but does not precipitate as crystals to form stones directly.
D: Theophylline does not crystallize or precipitate in urine; it primarily affects bronchodilation, not renal stone formation.
Cystitis is associated with all of the following EXCEPT
Rationale:
Cystitis is associated with fever. Cystitis typically presents with urinary urgency, pain, and sometimes fever, but fever is less common in uncomplicated cases. Fever generally suggests upper urinary tract involvement like pyelonephritis, not isolated cystitis. Hence, fever is not a characteristic feature of cystitis alone, distinguishing it from more severe infections involving the kidneys.
A: urgency Urinary urgency is a hallmark symptom of cystitis, reflecting bladder irritation and inflammation, making this option consistent with cystitis manifestations.
B: adenovirus Adenovirus can cause hemorrhagic cystitis, linking this virus directly to cystitis, thereby confirming its association rather than exclusion.
D: absence of renal scarring Renal scarring is absent in uncomplicated cystitis, aligning with typical cystitis pathology without kidney involvement, confirming this option is related.
In contrast to the concentration of blood urea nitrogen, the serum creatinine level is primarily influenced by
Rationale:
Serum creatinine level is primarily influenced by muscle mass.
Muscle mass affects serum creatinine because creatinine is a breakdown product of creatine phosphate in muscle, making its concentration dependent on muscle quantity rather than factors like hydration or nitrogen balance. Larger muscle stores consistently produce more creatinine, directly impacting serum levels independently of renal function or blood volume changes.
A: State of hydration affects blood urea nitrogen concentration but has minimal impact on serum creatinine, which remains relatively stable despite fluid volume changes.
B: Nitrogen balance influences blood urea nitrogen levels due to protein metabolism, yet serum creatinine is unrelated to nitrogen intake or utilization.
D: Hemorrhage alters blood volume and hemoglobin but does not directly modify serum creatinine, which depends on muscle metabolism rather than acute blood loss.
Pathognomonic in diagnosis of X-linked type of hereditary nephritis is
Rationale:
Pathognomonic in diagnosis of X-linked type of hereditary nephritis is discontinuous epidermal basement membrane staining.
Discontinuous epidermal basement membrane staining uniquely identifies the X-linked hereditary nephritis by revealing characteristic abnormalities in collagen IV distribution, which directly reflects the genetic defect in the COL4A5 gene. This finding is specific and sensitive, distinguishing it from other nephritis types and related conditions, making it essential for definitive diagnosis.
A: Gross hematuria commonly occurs but lacks specificity, appearing in various renal diseases and not uniquely indicating X-linked hereditary nephritis.
C: Platelet abnormalities are unrelated to the pathophysiology of X-linked hereditary nephritis and do not serve as diagnostic markers for this condition.
D: Hearing loss, although associated with some hereditary nephritis forms, is not pathognomonic and can result from multiple other causes, limiting its diagnostic precision.
WHO classification of lupus nephritis is based on a combination of features including light microscopy, immunofluorescence, and electron microscopy. Of the following, the WORST outcome is associated with
Rationale:
Class IV nephritis is associated with the worst outcome among lupus nephritis classes. This classification denotes diffuse segmental or global endocapillary or extracapillary glomerulonephritis involving more than 50% of glomeruli, leading to severe inflammation, extensive tissue damage, and a higher risk of progression to renal failure, thus correlating with poorer prognosis compared to other classes.
A: Class I nephritis represents minimal mesangial lupus nephritis with normal light microscopy and minimal clinical impact, typically resulting in a benign course without significant renal impairment or progression.
B: Class II nephritis shows mesangial proliferative changes only, associated with mild clinical symptoms and a generally favorable prognosis, lacking the extensive glomerular involvement seen in higher classes.
C: Class III nephritis involves focal segmental glomerulonephritis affecting less than 50% of glomeruli, leading to moderate damage but with better outcomes and less aggressive disease than diffuse Class IV involvement.
Renal cortical necrosis is a rare cause of acute renal failure occurring secondary to extensive ischemic damage of the renal cortex. Of the following, the LEAST common cause is
Rationale:
Renal cortical necrosis least commonly results from infectious endocarditis. This condition primarily causes embolic phenomena affecting various organs but rarely leads to the extensive ischemic damage of the renal cortex that characterizes renal cortical necrosis. The rarity of infectious endocarditis causing such cortical ischemia distinguishes it from other more frequent etiologies in acute renal failure cases.
A: Perinatal asphyxia frequently induces widespread ischemic injury in neonates, including the renal cortex, making it a recognized cause of cortical necrosis in newborns.
B: Severe congenital heart disease leads to compromised renal perfusion and ischemia, contributing significantly to renal cortical necrosis due to chronic hypoxia and low cardiac output states.
C: Severe hemolytic-uremic syndrome causes microvascular thrombosis in renal vessels, resulting in cortical ischemia and necrosis, thus commonly implicated in acute renal failure with cortical involvement.
Transient proteinuria can be seen in all the following EXCEPT
Rationale:
Transient proteinuria can be seen in all the following except seizures. Transient proteinuria typically occurs due to physiological stressors such as fever, exercise, or changes in hydration status; these conditions temporarily increase glomerular permeability or alter renal hemodynamics. Seizures, however, do not directly induce transient proteinuria through such mechanisms, making them an exception in this context.
A: temperature >38.3°C Causes transient proteinuria by increasing body metabolism and glomerular permeability during febrile illnesses, triggering temporary protein leakage without permanent kidney damage or chronic proteinuria.
B: exercise Induces transient proteinuria through increased renal blood flow and glomerular pressure during physical exertion, causing temporary protein leakage that resolves with rest and is not harmful long-term.
C: overhydration Leads to transient proteinuria by diluting urine and altering renal tubular function, which temporarily changes protein handling but does not indicate pathological kidney damage or persistent proteinuria.
Congenital nephrotic syndrome is defined as nephrotic syndrome manifesting at birth or within the first 3 months of life. The etiologies include all the following EXCEPT
Rationale:
Congenital nephrotic syndrome does not include infantile systemic lupus erythematosus as an etiology. This condition manifests nephrotic syndrome at birth or within three months, primarily caused by infections or toxic exposures, whereas lupus erythematosus typically presents later and is not a recognized cause of congenital nephrotic syndrome.
A: Syphilis causes congenital nephrotic syndrome by damaging the kidneys through transplacental infection, fitting the timeline of nephrotic syndrome manifesting within the first three months of life.
B: Herpes infection is a known cause of congenital nephrotic syndrome due to in utero infection leading to renal damage, consistent with early neonatal presentation.
C: Mercury exposure leads to nephrotic syndrome in neonates through toxic renal injury, aligning with the congenital onset timeframe unlike autoimmune conditions.
Nephrogenic diabetes insipidus is a disorder of water metabolism characterized by an inability to concentrate urine, even in the presence of antidiuretic hormone. Of the following, the LEAST likely cause is
Rationale:
Nephrogenic diabetes insipidus is least likely caused by chronic hyperglycemia.
Chronic hyperglycemia primarily leads to osmotic diuresis due to glucosuria rather than a direct impairment of the renal collecting duct’s response to antidiuretic hormone. It does not interfere with water reabsorption mechanisms, unlike other causes that impair the kidney’s ability to concentrate urine by disrupting ADH signaling or receptor function.
A: Genetic mutations commonly affect the vasopressin receptor or aquaporin channels, directly impairing renal response to ADH, making this a frequent cause of nephrogenic diabetes insipidus.
B: Lithium toxicity disrupts renal tubular function by inhibiting the action of ADH at the collecting duct, a classic and well-documented cause of nephrogenic diabetes insipidus.
C: Hypercalcemia interferes with renal concentrating ability by inducing tubular damage and reducing ADH responsiveness, contributing significantly to nephrogenic diabetes insipidus pathophysiology.
The initial management of testicular torsion is
Rationale:
The initial management of testicular torsion is manual detorsion followed by orchiopexy. Manual detorsion provides a rapid, non-invasive attempt to restore blood flow and relieve ischemia, crucial to preserving testicular viability. Subsequent orchiopexy secures the testis, preventing recurrence. This approach prioritizes urgent intervention to minimize tissue damage, aligning with established clinical protocols for timely torsion treatment.
A: Observation with repeat ultrasound delays critical intervention, risking irreversible testicular damage due to prolonged ischemia, thus unsuitable for immediate torsion management.
C: Emergency scrotal exploration, while definitive, follows initial manual detorsion; skipping manual detorsion omits an important first step that may restore perfusion non-surgically.
D: Administration of antibiotics targets infection, not ischemia caused by torsion, so it neither alleviates vascular compromise nor addresses the primary pathology requiring urgent correction.
The initial management of localized renal cell carcinoma in children is
Rationale:
Radical nephrectomy is the initial management of localized renal cell carcinoma in children. This approach involves complete removal of the affected kidney to ensure thorough excision of the tumor, minimizing the risk of residual disease and recurrence. It remains the standard treatment due to the tumor’s resistance to chemotherapy and radiation, emphasizing surgical intervention's critical role in localized cases.
B: Partial nephrectomy preserves renal tissue but is less favored initially for localized renal cell carcinoma in children because it may leave malignant cells behind, increasing recurrence risk and complicating complete tumor removal.
C: Chemotherapy followed by surgery is not standard since renal cell carcinoma typically shows poor responsiveness to chemotherapy, making surgery the primary modality for localized disease management in pediatric patients.
D: Radiation therapy is generally ineffective as a first-line treatment for localized renal cell carcinoma in children, given the tumor’s relative radioresistance and the preference for surgical excision to achieve local control.
A 5-year-old is discharged from the hospital following the diagnosis of hemolytic uremic syndrome (HUS). The child has been free of diarrhea for 1 week and renal function has returned. The parent asks when the child can return to school. Which is the nurse’s best response?
Rationale:
The nurse’s best response is, "It would be best to keep your child home to monitor urinary output."
Monitoring urinary output is essential after HUS because kidney function may fluctuate even after initial improvement. Close observation helps detect early signs of relapse or complications. Returning to school too soon risks missing subtle changes in renal status, which can lead to delayed treatment and worsen outcomes in this vulnerable recovery phase.
A: Immediately, as your child is no longer contagious. This option overlooks the need for ongoing renal monitoring. Contagiousness is less relevant than assessing kidney recovery and overall health stability before resuming normal activities.
B: It would be best to keep your child home for a few more weeks because the immune system is weak and there could be a relapse of HUS. This misattributes relapse risk primarily to immune weakness rather than renal function monitoring, which is the critical factor in safe discharge planning.
C: Your child will be contagious for approximately another 10 days, so it is best not to allow a return just yet. Contagiousness after diarrhea resolution is unlikely; the main concern is kidney function, not ongoing infection transmission risk.
A teen wakes up complaining of intense pain and swelling of the scrotal area with abdominal pain and has vomited twice. Which should the nurse suggest?
Rationale:
The nurse should suggest taking him to the emergency room immediately. Immediate ER evaluation is critical because intense scrotal pain with swelling, abdominal pain, and vomiting can indicate testicular torsion, a surgical emergency requiring prompt intervention to save the testicle. Delayed treatment risks permanent damage and loss of function, making urgent care essential.
A: Encourage clear liquids until vomiting subsides; if worse, bring him to the ER. This approach delays urgent diagnosis and treatment, risking irreversible damage from conditions like testicular torsion that require immediate medical attention.
B: Bring him to the pediatrician’s office for evaluation. A pediatrician’s office may lack the urgent diagnostic tools and surgical facilities necessary for rapid treatment of acute scrotal emergencies, prolonging critical intervention.
D: Encourage rest and ice application, and go to the ER if pain does not improve. Rest and ice are insufficient for sudden intense scrotal pain signaling emergencies; any delay can lead to permanent testicular injury or loss.
A child who has had a kidney removed will experience pain due to which of the following?
Rationale:
A child who has had a kidney removed will experience pain due to post-operative shift of fluids and organs in the abdominal cavity. This shift causes stretching and pressure on surrounding tissues and nerves, leading to discomfort. The body adjusts to the missing kidney by redistributing internal structures, triggering pain signals as organs settle into new positions and fluid dynamics change within the abdomen.
A: Laparoscopic removal with residual air causing discomfort. Residual air after laparoscopic surgery can cause shoulder pain, but it is not the primary source of post-nephrectomy pain related to organ displacement.
C: Chemotherapy-induced pain sensitivity. Chemotherapy pain sensitivity occurs from nerve damage during drug treatment, unrelated to kidney removal and organ shifts within the abdominal cavity.
D: Radiation-induced pain sensitivity. Radiation pain sensitivity emerges from tissue inflammation after treatment, which does not apply here as kidney removal involves surgery, not radiation exposure.
The parent of a 3-year-old with suspected Wilms tumor says, 'How could I have missed a lump this big?' Which is the nurse’s best response?
Rationale:
The tumor grows very rapidly, so it may not have been noticeable just a few days ago. Wilms tumor typically enlarges quickly, which can explain why a previously undetected abdominal mass suddenly becomes apparent, reassuring the parent that missing it earlier is understandable due to the tumor’s swift progression rather than neglect or oversight.
A: Do not be hard on yourself; it’s easy to overlook something that has been growing for months. This option inaccurately suggests slow growth, whereas Wilms tumor often advances rapidly, making the timeline unrealistic.
B: I understand you’re upset; earlier detection might have improved prognosis. This statement may inadvertently induce guilt without addressing the tumor’s rapid growth, which is a more appropriate reassurance.
C: It takes a trained professional to recognize such a lump. This response dismisses the parent's concern and implies blame, rather than offering comfort or explaining the tumor’s rapid emergence.
Which child is at risk for developing glomerulonephritis?
Rationale:
A 3-year-old who had impetigo 1 week ago is at risk for developing glomerulonephritis. Post-streptococcal glomerulonephritis commonly follows skin infections like impetigo due to immune complex deposition in the kidneys. This latent period aligns with typical disease onset, making recent impetigo a classic precursor to glomerulonephritis in pediatric patients.
B: A 5-year-old with recurrent UTIs is more prone to kidney infections or scarring, not immune-mediated glomerulonephritis. UTIs primarily affect the lower urinary tract rather than causing the immune complex deposition characteristic of glomerulonephritis.
C: A 6-year-old with new-onset type 1 diabetes faces risks related to hyperglycemia and diabetic nephropathy, which develops over years, not acute glomerulonephritis triggered by infections or immune responses.
D: A 10-year-old recovering from viral pneumonia is unlikely to develop glomerulonephritis as this condition generally follows streptococcal infections rather than viral respiratory illnesses, which do not cause the typical immune complex damage.
Which is an accurate description of a Kasai procedure?
Rationale:
A palliative procedure in which the bile duct is attached to a loop of bowel to assist with bile drainage. This description accurately captures the Kasai procedure’s purpose: to restore bile flow by connecting the bile duct to the intestine, alleviating symptoms without curing the underlying liver disease. It is primarily a symptomatic, not curative, intervention for biliary atresia.
B: A curative procedure in which a connection is made between the bile duct and bowel. This misrepresents the Kasai procedure as curative, whereas it only improves bile drainage. The underlying liver damage often continues, necessitating further treatment like transplantation.
C: A curative procedure in which the bile duct is banded to prevent leakage. Bile duct banding is not part of the Kasai procedure and does not address bile flow or drainage, making this description inaccurate regarding its function and intent.
D: A palliative procedure in which the bile duct is banded. Bile duct banding does not facilitate bile drainage and is not characteristic of Kasai surgery, which aims to bypass obstruction rather than constrict or band the bile duct.
The MOST likely cause of flank mass in neonate is
Rationale:
Flank mass in a neonate is most commonly caused by hydronephrosis. Hydronephrosis results from urinary tract obstruction causing dilation of the renal pelvis and calyces, which can be detected as a palpable mass. It is the leading cause due to congenital anomalies affecting urine flow, making it far more prevalent in neonates compared to other renal conditions.
A: Renal stones rarely present as a palpable flank mass in neonates since stone formation is uncommon at this age and typically does not cause significant renal enlargement or obstruction visible externally.
C: Glomerulonephritis primarily involves inflammation and damage at the glomerular level, leading to symptoms like hematuria and edema rather than forming a palpable mass in the flank region.
D: Interstitial nephritis involves inflammation of the renal interstitium without causing significant renal enlargement or a discrete mass, making it an unlikely source of a palpable flank mass in neonates.
A 6-year-old boy, he is a known case of nephrotic syndrome, presented with mild edema around the eyes and lower extremities, but urine albumin show trace result for three successive days.
Rationale:
Dilute urine explains the trace albumin results despite edema in this nephrotic syndrome case.
Dilute urine lowers the concentration of albumin, making it less detectable on dipstick tests. This explains the discrepancy between clinical signs of edema and minimal proteinuria, as the urine’s dilution masks the actual protein loss, leading to falsely low albumin readings despite ongoing nephrotic pathology.
A: extremely alkaline urine alters dipstick reactions but does not reduce detectable albumin concentrations, so it cannot explain trace results with edema.
B: delay in reading the test may cause false positives or negatives but does not consistently produce trace albumin in nephrotic patients.
D: glucose in urine interferes with some tests but does not specifically cause trace albumin readings in nephrotic syndrome cases.
A 9-year-old nephrotic syndrome patient with a history of thromboembolism.
Rationale:
Dipyridamole is the appropriate choice for a 9-year-old nephrotic syndrome patient with a history of thromboembolism.
Dipyridamole acts as an antiplatelet agent, reducing platelet aggregation and preventing further thrombus formation without the bleeding risks associated with stronger anticoagulants. Its safety profile and efficacy make it suitable for pediatric patients with thromboembolic history linked to nephrotic syndrome.
A: Warfarin carries significant bleeding risk and requires frequent monitoring, making it less suitable for a child with nephrotic syndrome.
B: Lovenox is a low molecular weight heparin better for acute management, not long-term thromboprophylaxis in pediatric nephrotic syndrome cases.
C: Low-dose aspirin is less effective in preventing venous thromboembolism, typically used for arterial thrombosis, thus inadequate for this patient’s thromboembolic history.
A 4-month-old baby boy did intravenous pyelography (IVP) because high suspicion of ureteropelvic junction obstruction. Post IVP patient became anuric for 24 hr.
Rationale:
Intravenous insulin/dextrose is the best treatment for this patient’s anuric episode following IVP. Insulin/dextrose helps shift potassium into cells, rapidly correcting hyperkalemia, a common and dangerous complication after contrast-induced acute kidney injury. This approach stabilizes cardiac membranes and reduces serum potassium levels, preventing fatal arrhythmias while other supportive treatments are initiated.
A: Bicarbonate Bicarbonate can alkalinize blood and shift potassium intracellularly but acts slower than insulin/dextrose and is less effective in urgent hyperkalemia management, making it less suitable for immediate treatment post-IVP.
B: Beta-agonists Beta-agonists promote potassium uptake into cells but are less potent and slower than insulin/dextrose, limiting their effectiveness in emergent hyperkalemia following acute kidney injury after contrast exposure.
C: Diuretics Diuretics increase potassium excretion but require kidney function, which is compromised in anuric patients post-IVP, rendering diuretics ineffective and potentially harmful due to volume depletion in this context.