The DeMeester score is used in ambulatory 24-hour pH monitoring to evaluate GERD. A score above what value is considered abnormal?

• A 7.5
• B 25
• C 50
• D 14.72 ✓

Explanation

The DeMeester score is a composite score derived from six pH parameters (total acid exposure time, upright acid exposure, supine acid exposure, total reflux episodes, episodes >5 minutes, longest episode). A DeMeester score above 14.72 is considered abnormal and indicates pathological gastroesophageal acid reflux. This threshold was established from normative data and is widely used as a diagnostic criterion for GERD in ambulatory pH studies.

Reference: Bailey & Love's Short Practice of Surgery, 27th ed.

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Written and medically reviewed by the StethoPrep medical team.