US Patent Issued to Hiroyuki Isayama, OLYMPUS MEDICAL SYSTEMS on Aug. 19 for "Method for forming access route to bile duct" (Japanese Inventors)

ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,390,623, issued on Aug. 19, was assigned to Hiroyuki Isayama (Tokyo) and OLYMPUS MEDICAL SYSTEMS CORP. (Tokyo).

"Method for forming access route to bile duct" was invented by Hiroyuki Isayama (Tokyo), Tomohiko Mamiya (Kawasaki, Japan) and Yutaka Yanuma (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of forming an access route to the bile duct includes: forming a tunnel extending from an oral ridge of a duodenal papilla, which is located on an oral side of a natural opening of a duodenal papilla, to the bile duct; and dilating a lumen of the tunnel more than when it was formed."

The patent was filed on Feb. 28, 2022, under Application No....