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  • Title: Prospective randomized comparison of short-access mother-baby cholangioscopy versus direct cholangioscopy with ultraslim gastroscopes.
    Author: Pohl J, Meves VC, Mayer G, Behrens A, Frimberger E, Ell C.
    Journal: Gastrointest Endosc; 2013 Oct; 78(4):609-16. PubMed ID: 23680176.
    Abstract:
    BACKGROUND: Mother-baby technologies, the criterion standard for cholangioscopy, have several limitations. A novel, short-access, mother-baby (SAMBA) system may improve this technique. Direct cholangioscopy (DC) was recently developed as an alternative to mother-baby cholangioscopy. OBJECTIVE: Comparison of success rates with SAMBA and DC. DESIGN: Single-center, randomized, controlled trial. SETTING: Academic tertiary-care referral center. PATIENTS: Sixty patients with suspected cholangiopathies randomized to either SAMBA (n = 30) or DC (n = 30). INTERVENTION: Cholangioscopy under deep sedation. MAIN OUTCOME MEASUREMENTS: Technical success rate of diagnostic or therapeutic procedure. RESULTS: A total of 24 and 21 diagnostic procedures were performed in the SAMBA and DC groups, respectively. There were no significant differences in the overall technical success rates between SAMBA (90.0%) and DC (86.7%) (P = 1.0). There was better correlation between the endoscopic prediction and histologic findings in DC (P = .013). Procedure times were shorter in DC (P < .03). In patients without significant stenoses, SAMBA allowed intrahepatic bile duct exploration in all cases, compared with 10.5% of cases in DC (P < .01). No differences regarding adverse event rates between the groups occurred (10.0% both groups). LIMITATIONS: Small sample size. Heterogeneous indications for cholangioscopy. DC requires advanced skills of the endoscopist. The study is not replicable. CONCLUSION: SAMBA and DC offer high technical success rates for diagnostic and therapeutic interventions. The advantages of DC consist of superior imaging, shorter total procedure time, and a wider working channel for adequate tissue sampling. SAMBA is better than DC with regard to intraductal stability and accessibility of the intrahepatic bile ducts.
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