Urologic Sepsis
Urosepsis is life-threatening infection from the urinary tract — managed with early antibiotics and resuscitation, but the decisive urological step is SOURCE CONTROL: drain any obstructed, infected system, because antibiotics alone fail while obstruction remains.
The big picture
Sepsis is a dysregulated host response to infection causing organ dysfunction; urosepsis is sepsis with a urinary source (commonly an obstructed infected kidney from a stone, but also catheter-associated infection, instrumentation, or pyelonephritis). The combination of pus under pressure and systemic infection is rapidly lethal without drainage.
Antibiotics + fluids + cultures + lactate AND urgent source control — an obstructed infected system must be drained; antibiotics alone are not enough.
Red flags
Urological emergency — drain urgently (stent/nephrostomy); antibiotics alone will fail.
Confirm the drain is correctly placed and patent — source not yet controlled.
Septic shock — escalate to critical care for vasopressors and organ support.
Mechanism pathway
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Diagnostic algorithm
Each step answers one question. Tap to expand.
Treatment ladder
Deliver the sepsis resuscitation bundle AND achieve urological source control without delay; antibiotics alone do not treat obstructed infection.
Complications
- Septic shock, multi-organ failure, AKI, death
- Renal loss from obstructed infection
- Drain malfunction/displacement
- Antibiotic toxicity, line/ICU complications
- Early antibiotics AND prompt source control
- Confirm the drain is working
- Re-drain ineffective drainage
- Organ support, tailored antibiotics
If treatment fails
If sepsis persists after treatment, ask first: is the source actually controlled — is the obstruction drained and the drain working?
Memory hooks
Sepsis Six: cultures, antibiotics, fluids — and check lactate.
Urosepsis = treat the body AND drain the source.
Antibiotics can't fix pus under pressure.
Stent or nephrostomy now.
Still septic? Check the drain works.
Board traps
Obstructing stone + sepsis → drain first; do not perform ureteroscopy/definitive surgery acutely.
Antibiotics alone for obstructed infection → wrong.
Persistent sepsis despite a stent → the stent may be failing; consider nephrostomy.
Clinical cases
A diabetic woman presents with rigors, left loin pain and hypotension. CT shows an obstructing 8 mm ureteric stone with hydronephrosis. She is started on IV antibiotics and fluids but remains hypotensive.
What is the essential next step?