Management of Renal Papillary Necrosis

Immediate Assessment and Stabilization

Assess for infected obstruction (pyonephrosis) by checking for fever, leukocytosis, and sepsis signs immediately, as this represents a urologic emergency requiring drainage within hours, according to the Infectious Diseases Society of America 1
Evaluate for hydronephrosis using CT imaging to assess for collecting system dilation, which combined with perinephric fat stranding confirms obstruction requiring intervention, as recommended by the American Urological Association 2

Emergent percutaneous nephrostomy is indicated for infected obstruction with perinephric fat stranding and pyonephrosis, with a patient survival rate of 92% versus 60% with medical therapy alone, according to the American Urological Association 2
Surgical debridement is reserved for cases with persistent obstruction, uncontrolled infection despite drainage, or massive hemorrhage unresponsive to conservative measures, as recommended by the Infectious Diseases Society of America 1
Antegrade nephroureteral catheter placement is preferred over double-J stents due to the risk of mucus plugging, particularly in patients with ileal conduits, as suggested by the American Urological Association 2

Do not assume perinephric fat stranding is benign, as it always indicates active pathology requiring investigation, particularly in high-risk patients, according to the American Urological Association 2
Do not delay drainage if infection is present, as perinephric stranding with fever/sepsis requires emergent decompression within hours, not days, as recommended by the American Urological Association 2
Do not rely on hematuria absence, as up to 25% of cases lack hematuria despite significant papillary injury, according to the American Urological Association 2