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Body position affects recumbent postprandial reflux

L C Katz¹, R Just, D O Castell

¹Division of Gastroenterology and Hepatology, Jefferson Medical College, Philadelphia, Pennsylvania.

Journal of Clinical Gastroenterology

|June 1, 1994

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Lying on your right side significantly increases gastroesophageal reflux time and prolongs acid clearance compared to the left side. This study clarifies positional effects on reflux for better management.

Area of Science:

Gastroenterology
Physiology

Background:

Gastroesophageal reflux disease (GERD) is common, but optimal sleeping positions remain debated.
Understanding positional effects on reflux is crucial for patient management.

Purpose of the Study:

To investigate whether sleeping position (right vs. left lateral decubitus) affects the amount of gastroesophageal reflux.
To compare postprandial reflux duration and acid clearance between the two positions.

Main Methods:

A survey of 103 gastroenterologists assessed expert opinion on reflux positions.
A randomized crossover study in 20 healthy subjects monitored esophageal pH for 4 hours after a high-fat meal.
Subjects were tested in both right and left lateral decubitus positions on separate days.

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Main Results:

45% of surveyed gastroenterologists were uncertain about positional effects on reflux.
The right lateral decubitus position showed significantly longer total reflux time (231 min vs. 117 min, p < 0.05).
Acid clearance was significantly prolonged in the right decubitus position (0.77 min/episode vs. 0.29 min/episode, p < 0.001).

Conclusions:

The right lateral decubitus position is associated with significantly increased gastroesophageal reflux duration and impaired acid clearance.
Findings suggest avoiding the right side-down position may benefit patients experiencing reflux symptoms.