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Related Experiment Videos

Nighttime reflux is primarily an early event.

Amine Hila1, Donald O Castell

  • 1Department of Gastroenterology and Hepatology, Medical University of South Carolina, Charleston, SC 29425, USA. hila@musc.edu

Journal of Clinical Gastroenterology
|July 8, 2005
PubMed
Summary

Nighttime acid reflux predominantly occurs in the first half of sleep. Eating meals close to bedtime significantly increases the risk of recumbent reflux episodes.

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Area of Science:

  • Gastroenterology
  • Digestive Health
  • Clinical Medicine

Background:

  • Ambulatory pH monitoring is crucial for diagnosing gastroesophageal reflux disease (GERD).
  • Clinical observations suggest nighttime reflux episodes are concentrated early in the sleep period.

Purpose of the Study:

  • To test the hypothesis that recumbent reflux occurs predominantly in the early nighttime period.
  • To analyze the timing and contributing factors of nocturnal reflux.

Main Methods:

  • Analysis of 201 consecutive ambulatory pH studies.
  • Defined abnormal recumbent reflux as >1.2% time pH < 4.
  • Divided the recumbent period into two halves to calculate reflux time.
  • Identified patients who ate meals within 2 hours of retiring.

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Main Results:

  • 59 patients (29%) had abnormal recumbent reflux.
  • Acid reflux was significantly more frequent in the first half (median 6.3%) vs. the second half (median 0.3%) of the recumbent period (P < 0.001).
  • Patients eating within 2 hours of bedtime were 2.46 times more likely to experience recumbent reflux.

Conclusions:

  • Nighttime reflux primarily occurs in the first half of the recumbent period, supporting the initial hypothesis.
  • Controlling early nighttime reflux is important for managing nocturnal GERD symptoms.
  • Counseling patients to avoid late meals and snacks is essential for preventing nocturnal reflux.