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US 11,633,209 B2Granted
Method for forming access route to bile duct and treatment method
AssigneesHiroyuki Isayama, Olympus Medical Systems Corp.
InventorsHiroyuki Isayama, Tomohiko Mamiya, Yutaka Yanuma
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Abstract
In a method of forming an access route to the bile duct, a needle is introduced into a duodenum, and the introduced needle is pierced into an oral side projection of a duodenal papilla, which is located at an oral position than an opening of the duodenal papilla. The tip of the pierced needle is made to reach the inside of the bile duct to form a tunnel communicating the duodenum and the bile duct, and a treatment device is inserted into the formed tunnel.
Claims12
A method for forming an access route to a bile duct, the method comprising:
- introducing a needle into a duodenum;
- piercing an oral side projection of a duodenal papilla with the needle, the oral side projection being located at an oral position other than an opening of the duodenal papilla;
- forming a tunnel by progressing a tip of the needle into the bile duct, the tunnel being configured to allow communication between the duodenum and the bile duct;
- and
- inserting a treatment device into the tunnel.
2 more elements
Dependencies are inferred from the claim text.