Background and aim: Pneumatic dilation is a commonly used treatment in achalasia. Recent studies have
shown that esophageal distensibility measurements can be used to assess the effect
of dilation and possibly the risk of perforation. A new hydraulic dilation balloon
allows visualization of the shape of the balloon in vivo and measurement of distensibility
during dilation. We aimed to evaluate the technical feasibility of a 30-mm shape-measuring
hydraulic dilation balloon for the treatment of achalasia.
Methods: Consecutive patients with newly diagnosed achalasia were dilated using a 30-mm shape-measuring
hydraulic dilation balloon. Patients were contacted 1 week, 1 month, and 3 months
after dilation. Technical success, clinical success, and major complications were
evaluated.
Results: Technical success was achieved in all of the 10 patients included. Median esophagogastric
junction distensibility (mm2/mmHg) increased from 1.1 (IQR 0.6 – 1.3) before dilation therapy to 7.0 (IQR 5.5 – 17.8)
afterwards (P = 0.005). No major complications were seen. Three patients (30 %) reported recurrent
dysphagia.
Conclusion: Hydraulic dilation with a shape-measuring balloon in achalasia patients is feasible.
In vivo esophageal distensibility measurements may allow for an individualized, patient-specific
dilation regimen.
The Netherlands National Trial Register: NTR4371