ANS: A
The transmission of ultrasonic waves through the renal parenchyma allows for visualization of the renal parenchyma and renal pelvis without exposing them to external beam radiation or radioactive isotopes. Computed tomography uses external radiation and sometimes a contrast medium. Intravenous pyelography uses contrast medium and external radiation for x-ray films, with contrast medium injected into the bladder through the urethral opening. External radiation for x-ray films is used before, during, and after voiding.
ANS: A
Cystitis is an inflammation of the bladder. Urosepsis is a febrile urinary tract infection with systemic signs of bacterial infection. Urethritis is an inflammation of the urethra. Bacteriuria is the presence of bacteria in the urine.
ANS: B
The short urethra in females provides a ready pathway for invading organisms. Increased fluid intake and frequent bladder emptying offer protective measures against urinary tract infections. Prostatic secretions have antibacterial properties that inhibit bacteria.
ANS: A
Cotton underpants are preferable to nylon ones. No evidence exists that limiting bathing, increasing fluids, decreasing salt intake, or cleansing the perineum with water decreases the incidence of urinary tract infections in young girls.
ANS: D
Hypospadias is a congenital condition in which the urethral opening is located anywhere along the ventral surface of the penis, not at the glans. Hypospadias does not refer to the size of the penis. When the urethral opening is along the dorsal surface of the penis, it is known as epispadias.
ANS: B
Phimosis is the narrowing or stenosis of the foreskin’s preputial opening. Chordee is the ventral curvature of the penis. Epispadias is the meatal opening on the dorsal surface of the penis. Hypospadias is a congenital condition in which the urethral opening is located anywhere along the ventral surface of the penis.
ANS: B
The objectives of therapy for a child with nephrosis include reducing the excretion of urinary protein, reducing fluid retention, preventing infection, and minimizing complications associated with therapy. Blood pressure is usually not elevated in nephrosis. Increased urinary protein excretion and increased fluid retention are part of the disease process and must be reversed.
ANS: A
Corticosteroids are the first line of therapy for nephrosis. Response is usually seen within 7 to 21 days. Antihypertensive agents and long-term diuretic therapy are usually not necessary. A diet that restricts fluid and salt may be indicated.
ANS: D
A common adverse effect of corticosteroid therapy is an increased appetite. Fever is not an adverse effect of this therapy—it may be an indication of infection. Hypertension is not usually associated with this therapy. Weight gain, not weight loss, is associated with corticosteroid therapy.
ANS: B
Salt is usually restricted (but not eliminated) during the edema phase. The child has very little appetite during the acute phase. Favourite foods are provided (with the exception of high-salt ones) in an attempt to provide nutritionally complete meals.
ANS: B
Urinalysis during the acute phase characteristically shows hematuria and proteinuria. Bacteriuria and changes in specific gravity are not usually present during the acute phase.
ANS: C
Glomerulonephritis causes decreased filtration of plasma. This decrease results in an excessive accumulation of water and sodium that expands plasma and interstitial fluid volumes, leading to circulatory congestion and edema. No malignant process is involved in acute glomerulonephritis. There is often a fluid volume excess, but its accumulation is secondary to the decreased plasma filtration.
ANS: C
Wilms’ tumour or nephroblastoma is the most common malignant renal and intra-abdominal tumour of childhood. It is a primary renal tumour.
ANS: D
The most common cause of acute renal failure in children is severe dehydration or other causes of poor perfusion that may respond to restoration of fluid volume. Pyelonephritis and tubular destruction are not common causes of acute renal failure in children. Obstructive uropathy may cause acute renal failure, but it is not the most common cause.
ANS: A
The principal features of acute renal failure are oliguria accompanied by hypertension. Hematuria and pallor, proteinuria and muscle cramps, and bacteriuria and facial edema are not principal features of acute renal failure.
ANS: D
Hyperkalemia is the most common threat to the life of the child. Signs of hyperkalemia include electrocardiograph anomalies such as prolonged QRS complex, depressed ST segments, peaked T waves, bradycardia, or heart block. Dyspnea, seizure, and oliguria are not manifestations of hyperkalemia.
ANS: A
Uremia is the retention of nitrogenous products, producing toxic symptoms. Oliguria is diminished urine output. Proteinuria is the presence of protein, usually albumin, in the urine. Pyelonephritis is an inflammation of the kidney and renal pelvis.
ANS: C
Chronic kidney disease leads to water and sodium retention, which contributes to edema and vascular congestion. Hyperkalemia, metabolic acidosis, and retention of blood urea nitrogen are complications of chronic kidney disease.
ANS: D
Children with chronic kidney disease have a characteristic breath odour resulting from the retention of waste products. Hypertension may be a complication. With chronic kidney disease, little or no urine output occurs, and hyperkalemia is a concern.
ANS: B
Uremic frost is the deposition of urea crystals on the skin, not in the urine. The kidneys are unable to excrete blood urea nitrogen, leading to elevated levels. There is no relation between cold temperatures and uremic frost.
ANS: B
Oral calcium carbonate preparations combine with phosphorus to decrease gastrointestinal absorption and the serum levels of phosphate; serum calcium levels are increased by the calcium carbonate, and vitamin D administration is necessary to increase calcium absorption. Calcium carbonate does not prevent vomiting, stimulate appetite, or increase the absorption of fat-soluble vitamins.
ANS: C
Dietary phosphorus is regulated to prevent or control the calcium–phosphorus imbalance by reducing the intake of protein and milk. Protein should be limited to decrease the intake of phosphorus. Vitamin D therapy is administered to increase calcium absorption; supplementation with vitamins A, E, and K is not part of the dietary management of chronic kidney disease.
ANS: D
Older children and adolescents need control. The necessity of dialysis forces the adolescent into a dependent relationship, which results in these behaviours. Neurological manifestations that occur with dialysis and physiological manifestations of renal disease are a function of the age of the child, they are not manifestations of dialysis. Adolescents do have coping mechanisms, but they need to have some control over their disease management.
ANS: D
Peritoneal dialysis is the preferred form of dialysis for parents, infants, and children who wish to remain independent. Parents and older children can perform the treatments themselves, and they can be done at home. Protein loss is not significantly different. Dietary limitations are necessary, but they are not as stringent as those for hemodialysis.