US 12,390,623 B2
Method for forming access route to bile duct
Hiroyuki Isayama, Tokyo (JP); Tomohiko Mamiya, Kawasaki (JP); and Yutaka Yanuma, Tokyo (JP)
Assigned to Hiroyuki Isayama, Tokyo (JP); and OLYMPUS MEDICAL SYSTEMS CORP., Tokyo (JP)
Filed by Hiroyuki Isayama, Hachioji (JP); and OLYMPUS MEDICAL SYSTEMS CORP., Hachioji (JP)
Filed on Feb. 28, 2022, as Appl. No. 17/682,517.
Application 17/682,517 is a continuation in part of application No. 17/081,270, filed on Oct. 27, 2020, granted, now 11,633,209.
Prior Publication US 2022/0176089 A1, Jun. 9, 2022
Int. Cl. A61B 17/34 (2006.01); A61F 2/04 (2013.01); A61M 27/00 (2006.01); A61M 29/02 (2006.01); A61B 17/32 (2006.01); A61M 25/09 (2006.01)
CPC A61M 27/002 (2013.01) [A61B 17/3478 (2013.01); A61F 2/04 (2013.01); A61M 29/02 (2013.01); A61B 2017/320056 (2013.01); A61F 2002/041 (2013.01); A61M 25/09 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for forming an access route to a bile duct, the method comprising:
forming a tunnel extending from an oral ridge of a duodenal papilla, which is located on an oral side of a natural opening of the duodenal papilla, to the bile duct; and
dilating a lumen of the tunnel more than when it was formed.