US 12,329,356 B2
Overtube with tube main body, gripping cylinder having obliquely extended connecting pipes, and balloon
Nobuharu Takahashi, Kanagawa (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on Jan. 29, 2021, as Appl. No. 17/161,679.
Application 17/161,679 is a continuation of application No. PCT/JP2019/030256, filed on Aug. 1, 2019.
Claims priority of application No. 2018-165190 (JP), filed on Sep. 4, 2018.
Prior Publication US 2021/0145258 A1, May 20, 2021
Int. Cl. A61B 1/00 (2006.01); A61B 1/005 (2006.01); A61M 25/10 (2013.01)
CPC A61B 1/00135 (2013.01) [A61B 1/00066 (2013.01); A61B 1/00082 (2013.01); A61B 1/005 (2013.01); A61M 2025/1061 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An overtube having an endoscope insertion passage through which an endoscope can be inserted, the overtube comprising:
a tube main body in which a first insertion passage constituting a part of the endoscope insertion passage is formed;
a gripping cylinder that is connected to a proximal end side of the tube main body, in which a second insertion passage constituting another part of the endoscope insertion passage is formed;
a balloon that is mounted to an outer peripheral surface on a distal end side of the tube main body; and
an air supply pipe line that is arranged to be parallel to the endoscope insertion passage from the tube main body to the gripping cylinder and communicates with the balloon, wherein the tube main body has a third insertion passage separated from the first insertion passage by an inner peripheral surface of the tube main body, and a portion of the air supply pipe line is formed inside the third insertion passage and between an outer peripheral surface and the inner peripheral surface of the tube main body, wherein
the gripping cylinder includes
a first connecting pipe that extends obliquely outward from a first position of a gripping cylinder side portion between a proximal end and a distal end of the gripping cylinder toward the proximal end side of the gripping cylinder, and has a gas pipe line communicating with the air supply pipe line; and
a second connecting pipe that extends obliquely outward from a second position different from the first position of the gripping cylinder side portion toward the proximal end side of the gripping cylinder and has a liquid pipe line communicating with the second insertion passage,
the gripping cylinder is an integrally molded body in which the first connecting pipe and the second connecting pipe are integrally molded, and
in a case where a plane orthogonal to a center axis of the gripping cylinder is defined as a first surface, and a plane orthogonal to the first surface and intersecting the air supply pipe line is defined as a second surface, the first position and the second position are disposed on the same side with respect to a reference surface orthogonal to the first surface and orthogonal to the second surface,
wherein an angle of a pipe line axis of the gas pipe line with respect to the reference surface is different from an angle of a pipe line axis of the liquid pipe line with respect to the reference surface.