[IT IS USEFULL THE UREA/CREATININE RATE FORDIFFERENTIATION OF UPPER FROM LOWER GASTROINTESTINAL BLEEDING?]

Area of Science:

• Gastroenterology
• Clinical Diagnostics

Background:

• Gastrointestinal bleeding is a common cause of hospitalization.
• Distinguishing the bleeding source can be clinically challenging.
• The urea/creatinine ratio is a potential biomarker for bleeding localization.

Purpose of the Study:

• To prospectively evaluate the diagnostic utility of the urea/creatinine ratio in differentiating upper from lower gastrointestinal bleeding.
• To assess the specificity and sensitivity of the urea/creatinine ratio for identifying bleeding origins.

Main Methods:

• Prospective study of 154 patients with gastrointestinal bleeding.
• Measurement of urea/creatinine ratio in patients with upper and lower GI bleeding.
• Statistical analysis to compare ratios and evaluate diagnostic performance.

Main Results:

• 123 patients (79.9%) had upper GI bleeding (urea/creatinine ratio: 62.27 ± 29.13).
• 31 patients (20.1%) had lower GI bleeding (urea/creatinine ratio: 39.49 ± 13.83).
• A ratio > 60 showed high specificity (96.77%) but low sensitivity (51.22%) for upper GI bleeding.

Conclusions:

• An elevated urea/creatinine ratio (> 60) is indicative of upper gastrointestinal bleeding.
• Lower urea/creatinine ratios lack definitive diagnostic value for bleeding localization.
• The urea/creatinine ratio has limitations due to significant overlap in results.