Kidney Infection (Pyelonephritis): Mild to Life-Threatening Severity Grades
Pyelonephritis severity spectrum:
- Mild: low-grade fever, flank pain, dysuria; outpatient oral antibiotics.
- Moderate: high fever, rigors, nausea/vomiting, dehydration; IV antibiotics, fluids.
- Severe: sepsis, septic shock, AKI, altered mental status; ICU care, broad-spectrum IV antibiotics, vasopressors.
Complications: renal abscess, papillary necrosis, emphysematous pyelonephritis, CKD. Prompt treatment prevents scarring.
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