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Esophageal motility after peroral endoscopic myotomy for achalasia

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Abstract

Background

Peroral endoscopic myotomy (POEM) has been introduced as a novel endoscopic treatment for achalasia. The aim of this work is to assess the changes in esophageal motility caused by POEM in patients with achalasia.

Methods

Forty-one patients with achalasia underwent POEM from September 2012 to November 2014. Esophageal motility of all patients was evaluated preoperatively and 1 month after POEM utilizing high-resolution manometry, which was performed with ten water swallows, ten steamed bread swallows, and multiple rapid swallows (MRS).

Results

In single swallows, including liquid swallows and bread swallows, all the parameters of lower esophagus sphincter resting pressure (LESP), 4-s integrated relaxation pressure (4sIRP), and intra-bolus pressure (IBP) were decreased between pre- and post-POEM patients (all p < 0.05). Postoperatively, the trend of distal contractile integral (DCI) and distal esophageal peristaltic amplitude declined in subtype II and subtype III (subtype II: p < 0.05; subtype III: p > 0.05), but increased in subtype I (subtype I: p > 0.05). In liquid swallows, the Eckardt score of subtype II patients decreased with DCI, and distal esophageal peristaltic amplitude after POEM was significantly lower compared with those showing increased values of those two parameters (p < 0.05). In MRS, the rate of LES relaxation increased from 66.67 to 95.24 %, but without normal response in all achalasia patients.

Conclusions

POEM reduces LES pressure in achalasia, and partly restores esophageal motility. POEM displayed varying effect on esophageal motility in patients with different patterns of swallowing. In addition, the changes in parameters associated with esophageal peristalsis correlated with decreases in Eckardt score.

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Authors and Affiliations

  1. Department of Gastroenterology, First Affiliated Hospital of Zhejiang Chinese Medical University, 54 Youdian Road, Hangzhou, 310006, China

    Yue Hu, Meng Li, Bin Lu, Lina Meng, Yihong Fan & Haibiao Bao

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  1. Yue Hu
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  2. Meng Li
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  3. Bin Lu
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  4. Lina Meng
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  5. Yihong Fan
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  6. Haibiao Bao
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Correspondence to Bin Lu.

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Hu, Y., Li, M., Lu, B. et al. Esophageal motility after peroral endoscopic myotomy for achalasia. J Gastroenterol 51, 458–464 (2016). https://doi.org/10.1007/s00535-015-1123-7

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  • DOI: https://doi.org/10.1007/s00535-015-1123-7

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