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Endoscopy. 2015 Dec;47(12):1106-12. doi: 10.1055/s-0034-1392417. Epub 2015 Jul 9.

Treatment of Barrett's esophagus with a novel focal cryoablation device: a safety and feasibility study.

Author information

1
St. Antonius Hospital, Nieuwegein, The Netherlands.
2
University Medical Center, Utrecht, The Netherlands.
3
Johns Hopkins Medical Institutions, Baltimore, Maryland, USA.
4
Columbia University Medical Center, New York, New York, USA.
5
University of Southern California, Los Angeles, California, USA.
6
Canonsburg General Hospital, Canonsburg, Pennsylvania, USA.
7
University of Rochester, Rochester, New York, USA.
8
Academic Medical Center, Amsterdam, The Netherlands.

Abstract

BACKGROUND AND AIMS:

Currently, eradication of Barrett's epithelium is preferably achieved using radiofrequency ablation (RFA) or spray cryoablation (SCA). However, both modalities suffer from drawbacks such as the need for sizing, multiple deployment steps, large controller units (RFA), imprecise dosing and need for gas-venting (SCA). The new Cryoballoon Focal Ablation System (CbFAS) may address these limitations. This study assessed the safety, feasibility, and dose response of the CbFAS in patients with flat Barrett's epithelium with or without dysplasia.

PATIENTS AND METHODS:

In this multicenter, prospective non-randomized trial, 39 patients were each treated with one or two ablations of 6, 8, or 10 seconds. Symptoms were assessed immediately and 2 days post-cryoablation. Follow-up endoscopy was performed 6-8 weeks post-procedure to assess response. Outcome parameters were incidence of adverse events, pain, esophageal stricture formation, and ablation response by cryogen dose.

RESULTS:

Of 62 ablations, 56 (10 with 6 seconds, 28 with 8 seconds, 18 with 10 seconds) were successfully performed. Six ablations failed because of device malfunction (n=3) and procedural or anatomic issues (n=3). Median procedure time was 7 minutes (interquartile range [IQR] 4-10). No major adverse events occurred; six patients experienced a minor mucosal laceration requiring no intervention. Mild pain was reported by 27% of patients immediately after cryoablation and by 14% after 2 days. No strictures were evident at follow-up.  Full squamous regeneration was seen in 47 treated areas (6 [60%] of the 6-second areas; 23 [82%] of the 8-second areas; 18 [100%] of 10-second areas).

CONCLUSIONS:

Focal cryoablation of Barrett's epithelium with the CbFAS is feasible and safe, resulting in squamous regeneration in the majority of patients.

Comment in

PMID:
26158241
DOI:
10.1055/s-0034-1392417
[Indexed for MEDLINE]

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