US 9,810,836 B2
External tube, laser transmission path, and laser treatment tool
Yoshihide Okagami, Kyoto (JP); Mikinori Nishimura, Kyoto (JP); and Yoshiteru Tamura, Kyoto (JP)
Assigned to J. Morita Manufacturing Corporation, Kyoto (JP)
Filed by Yoshihide Okagami, Kyoto (JP); Mikinori Nishimura, Kyoto (JP); and Yoshiteru Tamura, Kyoto (JP)
Filed on May 11, 2012, as Appl. No. 13/469,774.
Claims priority of application No. 2011-106516 (JP), filed on May 11, 2011; and application No. 2011-106517 (JP), filed on May 11, 2011.
Prior Publication US 2012/0289949 A1, Nov. 15, 2012
Int. Cl. A61B 18/22 (2006.01); F21V 8/00 (2006.01); A61B 1/00 (2006.01); A61B 1/018 (2006.01); A61B 18/20 (2006.01); G02B 23/24 (2006.01); A61B 18/00 (2006.01)
CPC G02B 6/0096 (2013.01) [A61B 1/00165 (2013.01); A61B 1/018 (2013.01); A61B 18/201 (2013.01); A61B 18/22 (2013.01); G02B 23/2476 (2013.01); A61B 2018/00023 (2013.01); A61B 2218/002 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A laser transmission device for use in an endoscope having a treatment instrument channel comprising:
an external tube comprising:
a tube wall having an outer circumferential surface and an inner surface;
a plurality of convex parts and a plurality of concave parts arranged on the outer circumferential surface of the external tube at regular intervals;
a plurality of projections projecting inward in a radial direction from the inner surface of the external tube, located at an equal interval on the inner surface in a circumferential direction of the external tube; and
an insertion channel defined by the inner surface of the tube wall;
a hollow laser waveguide inserted into the external tube insertion channel; and
a plurality of fluid passages, wherein a first set of fluid passages are located inside the plurality of projections and another set of fluid passages are defined between an outer surface of the hollow laser waveguide and the inner surface of the external tube,
wherein the laser transmission device is configured for insertion into the treatment instrument channel formed in a longitudinal direction of an external hose of the endoscope
such that the plurality of convex parts contact an inner surface of the endoscope treatment instrument channel.