ORENUC Classification: EAU standardized categorization for UTI risk factors. Helps tailor diagnostic intensity and antibiotic duration.
mnemonic classification
Guidelines & Evidence
Clinical Details
Section 1
When to Use
Overview
The ORENUC system is used to classify patients with UTIs based on their underlying risk factors to guide treatment intensity and duration.
Section 2
ORENUC System
O - Ordinary (No Risk)
Healthy, non-pregnant women without known anatomical or functional abnormalities.
R - Recurrent UTI
No extra risk, but experiencing recurrent episodes (≥2 in 6 months or ≥3 in 12 months).
E - Extra-urogenital Risk
Controlled systemic diseases (e.g., Diabetes, pregnancy) that increase susceptibility.
N - Nephrological Risk
Patients with renal insufficiency (CKD) or other non-structural renal diseases.
U - Urological / Surgical Risk
Anatomical abnormalities (stones, BPH) or functional issues (neurogenic bladder).
C - Catheter / Institutional
Permanent urinary catheters, stents, or patients in long-term care facilities.
Section 3
Clinical Utility
Severity Matching
["Grade 1: Minimal risk of severe complications.","Grade 2: Increased risk of complication/recurrence.","Grade 3: High risk of chronic sequelae or sepsis."]
