3.2 Study eligibility criteria
The inclusion criteria will be articles that present adult patients and
both sexes previously submitted to Roux-en-Y gastric bypass surgery with
a containment ring, patients with food intolerance. Articles that
present the duration in days of the effective action of plastic or
metallic stents to induce ring erosion will also be analyzed, as well as
articles that show whether the symptoms have resolved, the success rate
of ring removal, the need for endoscopic dilation, adverse events,
long-term follow-up for the possibility of weight gain or stenosis
formation. Exclusion criteria will be articles that present another
procedure for erosion or removal of the ring other than through stents
and endoscopic procedures, respectively.