Management of Urosepsis with Staghorn Calculi

Initial Management of Urosepsis

Urgent decompression of the collecting system is the standard of care for septic patients with obstructing stones, as the compromised delivery of antibiotics into the obstructed kidney mandates drainage to promote resolution of infection 3
Obtain urine and blood cultures before initiating antibiotics, but do not delay antibiotic administration while awaiting results 1
The choice between percutaneous nephrostomy (PCN) or ureteral stenting for decompression is at the discretion of the urologist, as both have been shown to be equally effective in obstructive pyelonephritis/pyonephrosis 3
Immediate broad-spectrum antibiotic therapy should be initiated, with third-generation cephalosporins showing superior outcomes compared to fluoroquinolones in recent studies 1

In this case of a cognitively impaired adult with a life-threatening condition, medical intervention is necessary despite parental refusal, as untreated staghorn calculi are likely to destroy the kidney and/or cause life-threatening sepsis 2
Patient survival was 92% when PCN was used for decompression, compared with only 60% for medical therapy without decompression 1
Antibiotics alone are insufficient in treating acute obstructive pyelonephritis; drainage is essential 1

Complete removal of the stone is an important goal to eradicate causative organisms, relieve obstruction, prevent further stone growth and associated infection, and preserve kidney function 2
Definitive treatment of the stone should be delayed until sepsis is resolved 3, 1
For staghorn calculi, percutaneous nephrolithotomy (PNL) monotherapy or combination of PNL and shock wave lithotripsy (SWL) is the recommended approach 2, 4
Open surgery should be considered only in rare cases where less invasive procedures are unlikely to be successful or in patients with extremely large staghorn calculi with unfavorable collecting system anatomy 4, 5

Nephrectomy should be considered when the involved kidney has negligible function, especially if it serves as a source of persistent morbidity such as recurrent urinary tract infection 4

Follow-up imaging to confirm complete stone removal is essential after definitive treatment 1

Staghorn calculi are often composed of struvite and/or calcium carbonate apatite, which are associated with urinary tract infections caused by urease-producing organisms 2
Bacteria reside within infection stones, causing the stone itself to be infected, in contrast to stones made of other substances where the stones remain sterile inside 2
Even small residual fragments may grow and be a source for recurrent urinary tract infection 2
PCN can yield important bacteriological information that may alter antibiotic treatment regimens by correctly identifying the offending pathogen 1