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What is the correct answer?

4

What is the treatment of choice for a 15 mm stone in the lower calyx with a narrow infundibulum?

A. ESWL

B. PCNL

C. radial nephrolithotomy

D. pyelolithotomy with ureteral stenting

Correct Answer :

B. PCNL


the clearance rate with stones at the lower calyx with tight infundibulum is best achieved using PCNL.

Related Questions

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4

In what kind of renal stones do antibiotics help most?

A. indinavir

B. magnesium ammonium phosphate

C. xanthine

D. matrix

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4

Why do patients with cystic fibrosis form stones?

A. because urine and body secretions are highly concentrated

B. due to renal leak hypercalciuria

C. as a result of distal renal tubular acidosis type I

D. because of reduced or absent of oxalobacter formigenes colonization

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4

What is true concerning uric acid stones?

A. they are metabolic stones that form at high urinary pH

B. they score 800 1000 HU on CT

C. only 25% of affected patients have Gout disease

D. affected patients must stop eating animal protein

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4

What is false concerning cystine stones?

A. have diagnostic hexagonal crystals

B. dont respond to ESWL therapy

C. are highly soluble in water

D. inherited in an autosomal recessive fashion

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4

What is the least likely condition to form bladder stones?

A. spinal cord injury

B. senile enlargement of prostate

C. augmented bladder

D. neurogenic hyper-reflexive bladder

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4

What is the most favorable stone characteristics for laparoscopic and robotic approaches for the treatment of a kidney stone?

A. a stone in the lower calyx with a wide mouth of infundibulum and obtuse lower calyx to ureter angle

B. a stone in an anterior group calyceal diverticulum with thin overlying renal parenchyma

C. 5 mm calcium-containing stone in an intrarenal pelvis and wide UPJ

D. 6 years post anatrophic nephrolithotomy, recurrent mid calyceal stone

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4

ESWL in pediatric patients is characterized by all of the following, EXCEPT:

A. often need sedation or anesthesia

B. vesico-ureteral reflux must be excluded

C. pediatrics have a higher clearance rate of stones when compared to adults

D. safety measures must be taken to avoid lung contusions

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4

Ureteral stones of ≥ 7 mm:

A. should be treated with more analgesics

B. must undergo metabolic worked out

C. are unlikely to pass out spontaneously

D. chemolysis should be tried first

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4

What is false concerning urethral stones?

A. stones at posterior urethra could be pushed back to the bladder

B. stones at anterior urethra have to undergo a trial of milking out, using copious intra-urethral xylocaine gel

C. often respond to a two-week course of tamsulosin

D. respond to Holmium laser treatment

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4

What is false regarding DJ ureteral stents?

A. can be introduced from the bladder or kidney or any part of the ureter`s course

B. the standard adult size is 32 cm long, 4 mm calibre

C. might result in encrustations and ureteral obstruction

D. might result in ureteral dilation

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4

What bowel surgery could result in enteric hyperoxaluria?

A. right hemicolectomy

B. small bowel resection

C. Roux-en-Y gastric bypass

D. b & c

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4

What is the most favorable stone characteristic for PCNL treatment?

A. ≥ 2 cm diameter

B. upper calyx location

C. Na.urate composition

D. 600 - 800 HU density

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4

Which of the following is a relative contra-indication to ESWL?

A. renal insufficiency

B. active urinary tract infection

C. uncorrected bleeding disorder

D. third trimester pregnancy

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4

Two weeks of prolonged wound drainage after a non-stented Anderson-Hynes pyeloplasty. What would be next step in the management?

A. watchful waiting

B. open surgical correction

C. IVU with possible endoscopic ureteral stenting

D. perc. nephrostomy tube insertion

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4

What is the sure diagnostic finding of Ca.oxalate stones?

A. chemical analysis of a recovered stone

B. hypercalcemia

C. CT finding

D. high breakability on ESWL

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4

What is the most common composition of ureteral stones?

A. Ca.phosphate

B. Ca.oxalate

C. Na.urate

D. struvite

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4

What is true concerning the use of intravenous fluids in renal colic cases?

A. patients should be given large amounts of fluids to hasten stones passage

B. fluids are given to keep the patient well hydrated

C. the recommended regimen is 2 L of ringer lactate over 2 hours

D. fluids are contraindicated if desmopressin (DDAVP) was given

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4

As per the fixed particle theory of stone formation:

A. the initial step is papillary plaque formation

B. crystals formation occurs inside the nephron

C. tubular precipitates form harmless crystalluria

D. the attraction of organic compounds and activation crystallization is regulated by osteopontin

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4

What is the Hounsfield density range of uric acid stones?

A. 400 600 HU

B. 600 800 HU

C. 800 1000 HU

D. 1000 1200 HU

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4

What is false concerning prostatic stones?

A. composed of calcium phosphate and calcium carbonate

B. the vast majority are asymptomatic

C. most of the calculi are found in the transitional zone

D. they dont affect PSA levels

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4

What is false regarding hypomagnesuric calcium nephrolithiasis?

A. it is characterized by low urinary magnesium and citrate

B. magnesium increases renal tubular citrate resorption

C. diarrheal is a remarkable side effect of magnesium therapy

D. potassium-magnesium preparations might restore urinary magnesium and citrate levels

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4

What is false concerning preputial stones?

A. form due to inspissated smegma

B. form due to stasis of urinary salts

C. cause inguinal lymphadenopathy

D. often associated with phimosis in uncircumcised males

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4

Which of the following dietary advice is recommended for Ca.oxalate stone formers?

A. limit beef, chicken, pork, eggs, fish, shellfish, and other animal proteins

B. limit beans, nuts, chocolate, coffee, dark green vegetables, and soda

C. limit canned, packaged, and fast foods

D. limit milk, cheese, and other dairy products

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4

What situation carries lower risk for lung injury during supracostal upper pole access for PCNL?

A. placing the patient in anti-Trendelenburg position

B. making the puncture under local anesthesia

C. injection Co2 gas to create a safety space under the diaphragm before puncturing

D. making the puncture during full expiration

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4

What is the most important parameter that determines the treatment modality of a kidney stone?

A. stone chemical composition

B. stone burden

C. first stone vs. recurrent

D. stone density

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4

A 24-hr urine collection of a recurrent Ca. oxalate stone former patient having Crohn`s disease might reveal:

A. high citrate, high oxalate

B. low citrate, low oxalate

C. high citrate, low oxalate

D. low citrate, high oxalate

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4

What is the least serious complications of PCNL?

A. uncontrollable bleeding

B. incomplete removal of stones

C. pneumothorax

D. colonic perforation

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4

What parameter impairs the kidney stone-free rate, after ESWL?

A. short skin-to-stone distance (SSD)

B. end-stage renal failure

C. a stone in the upper calyx

D. the presence of a 30 cm, 4.7 Fr ureteral stent in situ

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4

What statement is false concerning the use of desmopressin (DDAVP) in renal colic patients?

A. it causes reduction in the mean intra-ureteral pressure

B. it reduces the pain of acute renal colic

C. it has a direct relaxing effect on the renal pelvis and ureteral musculature

D. it is indicated when stones are ≤ 4 mm in diameter

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4

What is the favorable stone characteristic for ESWL treatment?

A. 1000 - 1300 HU density

B. 5 - 10 mm diameter

C. lower calyx location

D. mid ureteral location