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Urology173 papers

Calculous pyelonephritis

Last edited: 4/16/2026

Overview

Calculous pyelonephritis involves infection associated with renal calculi, often progressing from untreated or inadequately managed urolithiasis. It is characterized by fever, flank pain, and systemic signs of infection, necessitating prompt intervention to prevent complications like sepsis and renal failure 474.

Diagnosis

  • Clinical presentation: Fever, flank pain, costovertebral angle tenderness, and signs of systemic infection 474.
  • Imaging: Non-contrast CT is often first-line for detecting stones and complications 1421.
  • Laboratory tests: Elevated white blood cell count, C-reactive protein, and urinalysis showing pyuria and bacteriuria 474.
  • Urine culture: Essential for identifying causative organisms and guiding antibiotic therapy 474.
  • Management

  • Antibiotics: Broad-spectrum coverage initially, tailored based on culture and sensitivity results 474.
  • Surgical intervention: Percutaneous nephrolithotomy (PCNL) or ureteroscopy (URS) for stone removal, especially if stones are large or causing obstruction 472021.
  • Supportive care: Hydration, pain management, and monitoring for complications such as sepsis 474.
  • Stone management post-infection: Address underlying stone burden to prevent recurrence 920.
  • Special Populations

  • Pregnancy: Low-dose CT for diagnosis; conservative management preferred unless severe infection necessitates intervention 24.
  • Pediatrics: Metabolic evaluation crucial for recurrent cases; minimally invasive techniques preferred 5733.
  • Elderly: Consider comorbidities and functional status; tailored surgical approaches to minimize risks 74.
  • Key Recommendations

  • Prompt diagnosis and treatment of infection with broad-spectrum antibiotics initially, followed by culture-directed therapy (Evidence: Strong 474).
  • Surgical intervention for stone removal when indicated by stone size, location, or obstruction (Evidence: Strong 472021).
  • Post-treatment evaluation for residual stones to prevent recurrence (Evidence: Moderate 39).
  • Metabolic evaluation in pediatric patients to identify and manage risk factors for recurrence (Evidence: Moderate 5).
  • Minimize radiation exposure during imaging and procedures, especially in pediatric and pregnant patients (Evidence: Expert opinion 2633).
  • References

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