Solid Swallow Examination During High Resolution Manometry and EGJ-Distensibility Help Identify Esophageal Outflow Obstruction in Non-obstructive Dysphagia.
Fritz Ruprecht Murray, Lara Maria Fischbach, Valeria Schindler and 4 others
PMID 33609164WHAT IT FOUND
In 25 patients with dysphagia but normal water-swallow manometry, solid-meal testing identified outflow obstruction.
Most received dilation and improved. Low distensibility on imaging probe tracked with solid-meal pressures. This diagnostic yield requires prospective confirmation before changing practice.
Key findings
01All 25 patients in the solid-meal group had normal water-swallow manometry but pathologic solid-swallow pressures, meaning they would have been missed by standard testing alone.
02Lower esophagogastric junction distensibility was significantly associated with higher integrated relaxation pressure during solid swallowing across the whole cohort.
03Nineteen of the 25 patients identified only by solid-meal testing received achalasia-type treatment, and 17 of those 19 showed clinical or radiologic response.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
Retrospective design with a small sample of 42 patients, limiting statistical power and generalizability. Treatment decisions were made by clinicians using a combination of symptoms, manometry, and barium imaging, so the independent contribution of solid-meal testing or FLIP cannot be separated. FLIP results were explicitly excluded from treatment decisions, meaning the study cannot show whether distensibility alone changes management. The control group was considerably younger than the patient groups, which may confound distensibility comparisons. Esophageal contractility patterns during FLIP were not consistently documented, so the study cannot address how obstruction affects the body of the esophagus. Follow-up was short, with a median of 10 to 15 days after treatment, so durability of response is unknown.
Declared interests
Funded by the University of Zurich. No commercial conflicts of interest are reported in the supplied text.
The easy way to misread this
Do not read the treatment response rates as evidence that FLIP or solid-meal testing independently caused the improvement. Treatment decisions were made by clinicians using a combination of symptoms, water-swallow manometry, solid-swallow manometry, and barium imaging, and FLIP was explicitly excluded from those decisions. The study shows these tests can identify patients who may respond to intervention, but it does not isolate which test changed the outcome.