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Updated: May 31, 2026

Simultaneous Laryngopharyngeal and Conventional Esophageal pH Monitoring
Published on: December 14, 2020
Gastroesophageal Reflux and Body Movement in Infants: Investigations with Combined Impedance-pH and Synchronized
Tobias G Wenzl1, Olaf Stoltenburg, Jiri Silny
1Klinik für Kinder-und Jugendmedizin, Universitätsklinikum der RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany.
Insights
Gastroesophageal reflux (GER) in infants strongly correlates with body movement. Most GER episodes occurred during movement, suggesting a temporal link, though causality remains unclear.
Area of Science:
- Pediatrics
- Gastroenterology
- Infant Health
Background:
- Gastroesophageal reflux (GER) is common in infants.
- Understanding triggers for GER is crucial for infant care.
- Body movement is often anecdotally linked to GER episodes.
Purpose of the Study:
- To investigate the temporal association between gastroesophageal reflux (GER) and body movement in infants.
- To quantify the relationship between infant movement and GER occurrences.
Main Methods:
- Combined impedance-pH monitoring and video documentation were used.
- Infant activity was categorized into 'resting time' and 'movement time'.
- GER episodes were analyzed for their temporal proximity to body movements.
Main Results:
- A total of 341 GER episodes were recorded in 15 infants over 86 hours.
- 99% of GER episodes were associated with body movement within one minute.
- Only 1% of GER episodes occurred during resting periods (P < .0001).
Conclusions:
- A strong temporal association exists between GER and body movement in infants.
- The study design could not establish a definitive cause-and-effect relationship.
- Combined impedance-pH monitoring is an effective method for studying GER in infants.
Abstract:
The aim of this paper was to investigate the temporal association of gastroesophageal reflux (GER) and body movement in infants. GER were registered by combined impedance-pH, documentation of body movement was done by video. Videorecording time (Vt) was divided into "resting time" and "movement time" and analyzed for occurrence of GER. Association was defined as movement 1 minute before/after the beginning of a GER. Statistical evaluation was by Fisher's exact test. In 15 infants, 341 GER were documented during Vt (86 hours). 336 GER (99%) were associated with movement, only 5 episodes (1%) occured during resting time. Movement was significantly associated with the occurrence of GER (P < .0001). There is a strong temporal association between GER and body movement in infants. However, a clear distinction between cause and effect could not be made with the chosen study design. Combined impedance-pH has proven to be the ideal technique for this approach.
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