Shiga University of Medical Science

Micron Shiga Inc.

Ge Medical Systems Global Technology Company, LLC

Machida Endoscope Co., Ltd.

Alfresa Pharma Corporation

National University Corporation Shiga University

Neturen Co., Ltd.

Tocalo Co., Ltd.

Yamashina Seiki Co., Ltd.

National University Corporation Shiga University of Medical Science

Shigeyuki Naka

Yoshiyuki Murata

Tohru Tani

Yoshimasa Kurumi

Shigehiro Morikawa

Kunihiko Miyagi

Masayuki Misawa

Koichi Wakikaido

Hasnine Haque

Toru Tani

Shinya Miki

Makoto Hosaka

Hisanori Shiomi

Hiroya Akabori

Atsushi Yamada

Mamoru Takashina

Hideki Ishikawa

Teruaki Oikawa

Fumiaki Fujiwara

Keiichi Yoneda

Megumi Adachi

Tomoharu Shimizu

A bending and extending devicecomprises an elastic hollow guide unitand a movable partto be movably inserted into the guide unit. The movable partis constituted, either partially or entirely, of a plurality of belt-like flexible partsand, which extend in the axial direction of the guide unitand the flexible partsandare connected at distal ends. The bending and extending deviceis characterized in that, when, by the sliding operation of the flexible partsand, a cross-section in which a contact point T of the flexible partand the inner surface of the guide unitis present on an extending line Y extending from a line segment connecting the centroid P of the flexible partand the axial center G of the guide unitand in which the flexible partand the second flexible partare in contact with each other is generated, and when the cross-section is divided into two ranges by a predetermined straight line X, the centroid P of the flexible partis not positioned in a range in which the contact point T is present; and the predetermined straight line X is a line that passes through the axial center G of the guide unit, and that orthogonally crosses the extending line Y.

Bending and extending device and bending and extending method

It is an object to provide a surgical instrument capable of locally applying microwaves to a minute biological tissue. It has been found that microwaves can be transmitted to a tip of a tapered coaxial body () and that microwaves are radiated from the entire central conductor exposed in a major axis direction by decreasing a sectional area (preferably diameter) of a central conductor () and a sectional area (preferably inner diameter) of an external conductor gradually or in a step-by-step manner with a ratio between the sectional area (diameter) of the central conductor () and the sectional area (inner diameter) of the external conductor being set to be constant, thereby achieving the present invention.

Microwave surgical instrument

Microwave-irradiating surgical instruments for endoscopic forceps or scope-assisted surgery forceps that have long lead wires often generate heat even during microwave transmission and a water supply device for cooling is necessary. Accordingly, conventional surgical instruments that irradiated energy such as microwaves had a separate passage for passing water (a water supply device) inside the forceps or endoscope. Due to the space occupied by said water supply device, the image cable or work hole diameter could not be enlarged. Moreover, the presence of the water supply device made surgery difficult. The present invention was completed by the discovery that a microwave-irradiating instrument wherein the central conductor is hollow and forms a channel and said channel is used as a water supply tube, etc. solves the above problems without affecting microwave irradiation efficiency.

Microwave-irradiating instrument

It is an object to provide a surgical tool for excising a hard solid organ such as cirrhotic liver or cutting the organ into a groove without causing bleeding. The inventors of the present invention have found that an organ resection tool including a brush-like structure capable of performing microwave irradiation and/or a brush-like structure capable of receiving a microwave can achieve the above-mentioned object, to thereby arrive at the present invention (organ resection tool including a brush structure capable of performing microwave irradiation). For example, an organ can be crushed or scraped away by manually abrading the organ with a brush of a solid organ resection tool including a brush structure capable of performing microwave irradiation according to the present invention. Further, the organ can be concurrently coagulated through the microwave irradiation to stop bleeding.

Organ resection tool

Provided is a surgical instrument that is substitutable for an operation of placing each stitch with a threaded needle or a stapler. It is confirmed that, in a tissue suturing device including a clamping section, and a protruding section including a central conductor and/or an external conductor for applying a microwave, the protruding section and the clamping section bring fragmentary portions of tissues to be sutured into contact or overlap with each other, and coagulate and/or fix contact or overlap portions with the microwave, to thereby stitch the tissues to be sutured.

Tissue suturing device

A display device configured to display an endoscopic image obtained by an endoscope for observing an object is provided. The display device includes a projecting unit configured to project coordinate axes set to the object onto the endoscopic image, and a display unit configured to display thereon the endoscopic image and the coordinate axes projected onto the endoscopic image.

Display device, medical device, display method and program

In order to reliably cut off a living tissue by using a microwave in a surgical operation without causing excessive damage to the living tissue or without bleeding, it is necessary to suppress energy attenuation until the microwave reaches electrode blades for nipping, coagulating, and cutting off a tissue. However, it is difficult to suppress the energy attenuation. The present invention relates to a medical treatment device capable of reliably cutting off a living tissue by using a microwave while sealing vasculature by coagulating the living tissue without excessively damaging the living tissue. Specifically, the present invention relates to a medical treatment device including a movable first electrode blade connected to an external conductor and a fixed second electrode blade connected directly to a central electrode. The medical treatment device has a function of holding a living tissue between the movable first electrode blade and the fixed second electrode blade, coagulating the living tissue by supplying a microwave from the fixed second electrode blade, and cutting off the living tissue by turning the movable first electrode blade. In the medical treatment device, a turning mechanism for the movable first electrode blade is arranged at a certain clearance from the central electrode.

Medical treatment device for holding, coagulating, and cutting living tissue

The solution of the problem to be solved is the provision of a means for determining timing both accurately and securely at which a treatment is shifted from gripping and coagulation (hemostasis or sealing) to resection by using a multifunctional treatment tool capable of exfoliation, gripping, coagulation (hemostasis or sealing) and resection of the treated region in a bipolar microwave treatment tool. A microwave surgical device control method and a device, in which the completion of coagulation (hemostasis or sealing) of tissue is detected and a microwave oscillation output is controlled by making use of the change in the direct current electric resistance value due to the reduction in the amount of water as the temperature rise of the tissue at the time of heating and coagulation of the tissue in the treated region with microwaves.

Microwave surgical device

Provided is a medical treatment device capable of eliminating inconvenience of manipulation in actual clinical use, and ensuring a visual field by introducing a curve in the vicinity of an electrode portion of an outer cylindrical tube. The medical treatment device has the following structure: an electrode portion including a first electrode and a second electrode arranged opposed to the first electrode, the electrode portion having a grasping function, a coagulating function, and a cutting function; an operation portion for executing drive of the respective functions of the first electrode and the second electrode; a shaft portion for connecting the electrode portion and the operation portion; a connector portion connectable to a microwave power source; and a conductive rod, which is provided inside the shaft portion, for transmitting a microwave to the electrode portion, the medical treatment device utilizing the microwave being configured to: hold body tissue between the first electrode and the second electrode; coagulate the body tissue by supplying the microwave to the first electrode and the second electrode; and cut the body tissue through a mutual action of the first electrode and the second electrode, in which the shaft portion and the electrode portion are connected to each other with a bent holder.

Medical treatment device

The flexible endoscopehas a flexible insertion portionto be inserted in an observation zoneof a MRI apparatus. The insertion portionhas an inner tubemade of resin, triple helical tubescovering the inner tubeand an outer tubemade of resin and covering the triple helical tubes. The triple helical tubesinclude a first helical bandhelically wound around an outer peripheral surface of the inner tube, a second helical bandhelically wound around an outer periphery of the first helical bandin a direction opposite to a winding direction of the first helical bandand a third helical bandhelically wound around an outer periphery of the second helical bandin a direction opposite to the winding direction of the second helical band. The first to third helical bandsare made of phosphor bronze or copper-silver alloy, which are materials having low magnetic susceptibility.

Flexible endoscope suitable for MRI

Provided is an operating tool for organism, in particular, a microwave endoscope forceps. In terms of the operating tool for organism, provided is a multifunctional operating tool which has holding and scissors functions simultaneously, and may further perform coagulation (tissue fixation) by microwaves. The operating tool has no definite fulcrum, and has both the holding and scissors functions with a simple structure by deforming a long-track rod called beam. Two blades are insulated from each other so as to allow microwave current supply. With this structure, an operating tool having three functions, i.e., 'a holding function', 'a coagulating function', and &#x201c;a cutting function&#x201d; with a single tool may be developed.

Microwave endoscope forceps

Disclosed is an electrode device for microwave surgery which is provided with a marker securely fixed to the central electrode, which marker can provide a magnetic susceptibility artifact of a uniform size and shape free of fluctuation among electrode devices. The electrode device comprise a central conductor body, a tubular insulator body which covers the central conductor body except its distal end, a tubular external electrode which covers the tubular insulator body except its distal end part, and a central electrode which covers the distal end part of the central conductor body. The central conductor body, the insulator body, the external electrode and the central electrode are made of a nonmagnetic material, and a cylindrical member made of a magnetic material is fit around the distal end part of the central conductor body. At least one projection is defined on the lateral face of the central conductor body at the distal side of the cylindrical member, and the cylindrical member engages with the projection in the distal direction.

Growing community of inventors

Otsu, Japan

Shigeyuki Naka