Obstructing proximal ureteral stone with sepsis and acute kidney injury
A 58-year-old woman with no prior urologic history presents to the emergency department with 2 days of fever, rigors, and left flank pain. She is confused and hypotensive at 86/54 mmHg after 1 L of crystalloid; pulse is 124/min and temperature 38.8°C. White blood cell count is 19,000/µL and serum creatinine is 2.6 mg/dL (baseline 0.9). Lactate is 4.2 mmol/L. Urinalysis shows pyuria and bacteriuria. Noncontrast CT reveals an 11 mm stone at the left ureteropelvic junction with severe hydronephrosis and perinephric stranding; the right kidney is normal. Blood and urine cultures are sent. The intensivist asks whether to take her to the operating room immediately for ureteroscopy and stone laser.
1. What are the immediate management priorities, and should she undergo immediate ureteroscopy and laser lithotripsy?
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This is sepsis with an obstructed infected kidney - a urologic emergency. The priorities are resuscitation (fluids, vasopressors if needed, ICU), immediate cultures, and broad-spectrum IV antibiotics covering gram-negative bacilli, with source control by decompression. Do not take her directly for ureteroscopy and laser: in an unstable septic patient, prolonged retrograde instrumentation can raise pelvic pressure, spread infection, and worsen hemodynamics. Decompression should occur urgently, generally within 6–12 hours, and immediately if she remains hypotensive. Ureteroscopy is delayed until she is clinically improved, cultures are available, and coagulation is corrected. A normal contralateral kidney does not permit delay, because the infected obstructed unit is the source of sepsis.
2. How would you choose between a ureteral stent and a percutaneous nephrostomy?
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Both a ureteral stent and a percutaneous nephrostomy (PCN) are acceptable; the choice depends on local expertise and anatomy. In this unstable patient with an 11 mm proximal stone and likely pyonephrosis, I favor a PCN under local anesthesia because it avoids general anesthesia, does not require passing a guidewire past an impacted stone, and provides immediate drainage of pus. A stent is reasonable if the stone can be bypassed easily and the patient is stable enough for cystoscopy. If PCN output is purulent, leave the tube to gravity and do not perform a nephrostogram until infection is controlled. Do not attempt definitive stone removal at the same setting.
3. When and how should definitive stone management be performed?
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After she is afebrile, hemodynamically stable, and off vasopressors - usually within 1–2 weeks - proceed with definitive stone clearance. An 11 mm proximal ureteral stone is best managed with ureteroscopy and laser lithotripsy, often in a staged fashion, with a stent if there is residual edema or a large stone burden. Shockwave lithotripsy is less effective for a stone of this size and impaction. Send a stone culture, because infected stone material may harbor organisms not reflected in urine culture, and tailor antibiotics. Also obtain metabolic evaluation and imaging to ensure complete clearance. The nephrostomy or stent should remain until definitive treatment is complete.