A comparative study of side-viewing duodenoscope and forward-viewing gastroscope to perform endoscopic retrograde cholangiopancreatography in patients with Billroth II gastrectomy.

Abstract

Endoscopic retrograde cholangiopancreatography (ERCP) in patients with Billroth II gastrectomy is a difficult procedure. Although different endoscopes are used in these patients, comparative studies are limited. The aim of this study was to assess the efficacy and the safety of the forward-viewing gastroscope compared with the side-viewing duodenoscope. This study was conducted on 75 Billroth II gastrectomy patients who underwent ERCP by the same experienced endoscopist. Procedures were performed using side-viewing duodenoscope in the first 41 patients and forward-viewing gastroscope in the subsequent 34 patients. The success and complication rates of ERCP were compared between the two groups. Afferent loop intubation was achieved in 39 patients (95.1%) in the side-viewing duodenoscope group and in 34 patients (100%) in the forward-viewing gastroscope group (P = 0.49). The rates of reaching the papilla was 70.7% (n = 29) and 91.1% (n = 31), respectively (P = 0.06). Cannulation success rate after reaching the papilla was 100% in the side-viewing duodenoscope group and 90.3% in the forward-viewing gastroscope group. In the side-viewing duodenoscope group, 11 patients underwent sphincterotomy (EST), 14 patients underwent both EST and endoscopic papillary balloon dilatation (EPBD), and 4 patients underwent only EPBD. All but one patients in the forward-viewing gastroscope group underwent EPBD without EST. The technical and the clinical success rate did not statistically differ between the groups (70.7% vs. 82.3%, 68.3% vs. 79.4%, respectively). Adverse events included jejunal perforation in one patient (2.4%) in the side-viewing duodenoscope group, and pancreatitis in one patient (2.9%) in the forward-viewing gastroscope group (P > 0.05). This study indicates that forward-viewing gastroscope is as effective as side-viewing duodenoscope for ERCP in patients with Billroth II gastrectomy. Furthermore, EPBD without prior EST appears to be a safe and effective procedure in these patients.