Siv los ua kom nruj nruj ntawm Sphincter ntawm Oddi thiab tsob ntoo biliary. Embedded platinum-iridium cov cim kom yooj yim rau kev tso lub zais pa siv fluoroscopy. Ua nrog cov txheej txheem balloon tshiab folding rau qis profile uas ua rau kom yooj yim ntawm kev hla dhau ntawm qhov. Cov cim cim nyob rau hauv nruab nrab ntawm lub zais pa tuaj yeem ua rau pom tau los pab tus kws kho mob kom tswj tau txoj haujlwm zoo dua thaum nkag mus, kom tsis txhob muaj lub zais pa hauv lossis plam tawm. 3 txawv diameters kom tau raws li tus kws kho mob qhov kev thov.