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Updated: Jul 9, 2026
06:46
Simultaneous Laryngopharyngeal and Conventional Esophageal pH Monitoring
Published on: December 14, 2020
Summary
Gastric pH after vagotomy surgery remains acidic in some patients, even with reduced acid output. This study investigated intragastric pH levels post-vagotomy, finding persistent acidity in a subset of individuals.
Area of Science:
- Gastroenterology
- Surgical Research
Background:
- Vagotomy is a surgical procedure to reduce stomach acid production.
- Assessing long-term intragastric pH is crucial for understanding post-surgical outcomes.
Purpose of the Study:
- To evaluate 24-hour intragastric pH in patients several years after vagotomy.
- To correlate intragastric pH with gastric acid output.
Main Methods:
- Nasogastric intubation and gastric sample aspiration in seven patients (4 truncal, 3 selective vagotomy).
- Intragastric pH monitoring over 24 hours during normal daily activity.
- Comparison with pre- and early postoperative acid output studies in two patients.
Main Results:
- Mean intragastric pH showed an inverse correlation with basal and stimulated gastric acid outputs.
- Despite >70% reduction in acid output, one of four truncal vagotomy patients and two of three selective vagotomy patients exhibited predominantly acidic pH (<3.5).
Conclusions:
- Significant reductions in stimulated acid output post-vagotomy do not guarantee normalization of intragastric pH.
- A subset of patients may experience persistently acidic intragastric conditions years after vagotomy, irrespective of surgical type (truncal vs. selective).
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