Insertion portion rigidity changeable catheter with balloon

Abstract

An insertion portion rigidity changeable catheter with a balloon has an insertion portion including a coil-shaped member which is extensible and contractible and has a predetermined elastic force, with a compression length set to be a predetermined length, and a sheath which is a tube body with predetermined flexibility having a fluid conduit, includes a sheath main body surrounded by the coil-shaped member, and a sheath end portion provided at one end side of the sheath main body, having a diameter larger than the sheath main body and having a contact surface which one end surface of the coil-shaped member contacts, has one opening of the fluid conduit in the sheath end portion and has another opening of the fluid conduit at another end side of the sheath main body, an inflatable / deflatable balloon which is provided at the sheath end portion of the sheath, and is configured to be inflated by being supplied with a fluid via the one opening of the fluid conduit to expand an outside diameter dimension to be a diameter larger than an outside diameter of the sheath end portion, and to be deflated by the fluid being discharged via the one opening to be brought into close contact with an outer circumferential face of the sheath end portion, and an operation section which is fixedly provided at another end side of the sheath, and includes an operation section main body including a fluid supply and discharge apparatus connection portion which is directly or indirectly connected to a fluid supply and discharge apparatus which performs supply of the fluid into the balloon via the fluid conduit, or discharge of the fluid in the balloon, and a slide member which is slidably disposed in an inner surface side of the operation section main body, and is disposed at another end side of the operation section main body by an elastic force of the coil-shaped member.

Description

[0001] This application is an application number 201180035827.0, the international application number is PCT / JP2011 / 076906, the application date is November 22, 2011, and the invention title is "a catheter with a balloon with variable insertion part hardness". Apply. technical field [0002] The present invention relates to a catheter with a balloon having a variable hardness of an insertion portion for guiding an insertion portion of an endoscope to a target site. Background technique [0003] Among medical endoscopes, endoscopes to be inserted into lumens such as stomach and intestines have elongated insertion portions. The lumen is a three-dimensionally complex flexed shape. The distal end side of the insertion portion of the endoscope is provided with a curved portion capable of changing the orientation of the distal end of the insertion portion in, for example, the vertical direction or the lateral direction. By manipulating, for example, a bending lever provided in t...

AI Technical Summary

Problems solved by technology

[0027] However, the medical catheter disclosed in Patent Document 1 has a complicated structure

Furthermore, in this medical catheter, it is difficult to switch the entire insertion part from a hardened state to a soft state, or vice versa, from a soft state to a hardened state with a single operation.

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