Mitsubishi Cable Industries, Ltd.

Dainichi-nippon Cables, Ltd.

Other

Mitsubishi Jukogyo Kabushiki Kaisha

Machida Endoscope Co., Ltd.

Nipro Corporation

Keio University

Doryokuro Kakunenryo Kaihatsu Jigyodan

Mitsubishi Metal Corporation

Mitsubishi Metal Co.,

Atsushi Utsumi

Hiroyuki Hayami

Tamotsu Kaide

Shunichi Hayashi

Yuichi Komachi

Masahiro Miura

Kazuo Onishi

Katsuo Aizawa

Takao Kuroiwa

Takashi Matsumoto

Takashi Kawabata

Takeshi Satake

Yoshiaki Kondo

Tsunenori Arai

Motohiko Yamasaki

Shin Ishimaru

Hajime Tsujikawa

Masaaki Ohtsuji

Satoru Kondo

Shoichi Hamada

Junji Nakayama

Koichi Onishi

Takashi Suganuma

Toshiyuki Nakajima

Ryuji Kobayashi

Takeshi Shintani

Yukio Morita

Hiroyuki Tanaka

Toshikazu Gozen

Kohei Morisaki

Tsuneyuki Nagae

Masatoshi Takamatsu

Shinichi Okuno

Sunao Oshibe

Kenzou Semimoto

Yoshifusa Ouchi

Masaharu Noguchi

Tadaaki Sukawa

Koji Okawa

Toshiya Suzuki

Tsunenori c/o Keio UnivFac Of Science Tech Arai

A balloon catheter including a connecting member, a catheter shaft, a balloon and a heat-generating member. The heat-generating member is in contact with a fluid in a distal portion of the catheter shaft. A method for treating a patient including introducing a low temperature fluid which flows through the balloon, introducing energy into a catheter shaft, and converting the energy into heat by a heat-generating member to heat the fluid, whereby an organ of the patient is heated and cooled. In the method, a portion of a diseased tissue of the organ is (i) heated from 35 to 40&#xb0; C. to 60 to 80&#xb0; C. within 30 seconds, (ii) expanded by applying a pressure of 500 kPa or smaller to the balloon, and (iii) cooled to 45&#xb0; C. or lower within 40 seconds.

Balloon catheter, medical apparatus and method for treating living organ

An analysis system comprises an endoscope 10 insertable into the vessel and a Raman analysis apparatus 40. An insert cable 54 of the Raman analysis apparatus 40 is inserted into a channel 10of the endoscope 10. An excitation optical fiber 60 and a bundle 70A of a plural number of light receivingoptical fibers 70 are received in the insert cable 54. A transparent small piece 63 having a film-like excitation optical filter 64 is abutted against the distal end of the fiber 60. A transparent plate 71 having a film-like light reciving optical filter 72 is abutted against the distal end of fibers bundle 70A. The plate 71 has a center hole 71and the piece 63 is fitted into the hole 71.

Analysis system of matter adhered to inside wall of vessel

An endoscope apparatus has a side view endoscope for side viewing an object in a radial direction of a distal end constitutional portion and a balloon catheter . With an insert portion of a side view endoscope inserted in an insert tube of the balloon catheter , the balloon catheter is inserted into a blood vessel B. The insert tube is provided at its distal end with a transparent balloon . This balloon encloses the distal end constitutional portion . By feeding air (fluid) to this balloon , the balloon is expanded so as to be urged against an inside wall of the blood vessel B. This causes the blood to be discharged between the inside wall of the blood vessel B and the balloon , thus enabling to observe the inside wall of the blood vessel B through the side view endoscope

Endoscope apparatus for inside wall of blood vessel

A medical tube made of an organic polymer having a mechanical loss tangent of at least 0.5 at body temperature and a modulus of transverse elasticity of 1-1000 MPa at body temperature. The medical tube of the present invention can be easily inserted into the body, and gives less pain and less feeling of physical disorder during indwelling in the body or removal from the body.

Medical tube

An endoscope provided with a lighting apparatus. In this lighting apparatus, a tapered fiber is applied between a lamp and a base end face of a light guide. This taper fiber is in a tapered configuration which gradually diminishes in diameter toward an end side. The lamp is a high luminance lamp of a low outgoing angle. The lamp, a battery, and the tapered fiber of the lighting apparatus are arranged unitedly on a grip portion of the endoscope.

Endoscope including an improved lighting apparatus

Catheter with body temperature glass transition region

A pulling wire for tip articulation mechanism of endoscope is fitted with an overload preventing spring in the middle thereof. This spring is arranged to stretch upon more than a certain amount of tension. Elongation of the overload preventing spring absorbs any excessive tension which is exerted upon the pulling wire as a result of motion restriction of the endoscope. This spring is fabricated such that the material wire thereof is spirally coiled, and is simultaneously twisted so that forcing pressure is introduced in the spring in the direction in which the adjoining ring portions thereof are brought into pressure contact with one another it is subjected to tension.

Tip articulation mechanism for endoscopes

A process and apparatus for producing an elongated body changing in elastic modulus longitudinally thereof with use of polymers without resulting in variations in the outside and inside diameters of the body even when the polymers are different in extrusion characteristics or swelling characteristics. The apparatus may include a feeder 1 for extruding a first polymer in a molten state and a feeder 2 for extruding a second polymer, which is different from the first polymer in elastic modulus and similarly in a molten state. The feeders alternately discharge the respective polymers, which are continuously fed to a long-land die 5 along with a lubricant supplied from a lubricant applicator 4. The polymers are formed into the desired shape and cooled in the die 5, and thereafter extruded.

Process and apparatus for producing elongated body of elastic modulus

A method for producing an optical multiple fiber unit wherein a multiplicity of optical fibers are fused together with each other and each optical fiber has a core made of pure silica glass and a cladding layer made of silica glass containing a dopant and disposed on the core, by bundling a multiplicity of preforms corresponding to the optical fibers and drawing the bundle at a high temperture using the optical fiber preforms, preforms having a three-layer construction wherein a support layer made of a silica glass having a drawable temperture of at least 1,800.degree. C. is further disposed on the cladding layer, and drawing the bundle of the preforms to give a multiple fiber wherein the support layer of each optical fiber has a thickness of 0.01 to 1 .mu.m, in order to produce a multiple fiber in which the cladding layer of each optical fiber has a sufficient thickness to fulfill the function as a cladding layer and which has an excellent image-transmitting capacity.

Method of producing optical multiple fiber

The present invention relates to an energy transmission optical fiber which is a medium for transmitting high-energy beams within an ultraviolet range such as laser beams. Since an optical fiber according to the present invention comprises a core formed of pure silica and a clad having a graded index type distribution of refractive index and said clad is disposed on an interface between the core and the clad where many structural defects are generated, the transmission loss is not increased even after the transmission of high-energy beams for a long time. In addition, since the optical fiber according to the present invention comprises the core formed of pure silica having a high melting point, the high-energy beams can be transmitted without generating a melting fracture in the core.

Energy transmission optical fiber

A super-thin fiberscope having a main scope body which comprises a plurality of multi-component glass light guide fibers for transmitting light to illuminate a target to be viewed, a silica glass image guide for transmitting an image of the target, and a thin-walled main tube made of an imide resin and enclosing the image guide and the light guide fibers. The main tube has an outer diameter of 0.25 mm to 0.6 mm and a wall thickness of 10 .mu.m to 30 .mu.m.

Super-thin fiberscope

Radioactive materials can be safely analyzed by an emission spectroscopic analyzer comprising an exciting device for exciting a radioactive material to be analyzed to emit light. The exciting device is enclosed in a radiation shielding wall. A detecting device detects the emitted light. The detecting device is located outside the radiation shielding wall. A light-transmitting device is provided between the exciting device and the detecting device such that the emitted light impinging on a first end of the light-transmitting device will be received at the detecting device as light having been transmitted through the light-transmitting device and emitted from a second end of the light-transmitting device. The light-transmitting device penetrates a hole made in the radiation shielding wall which has a sealing structure to prevent radiation leakage. The light-transmitting device penetrates the hole with a curvature. A lens system is attached to the second end of the light-transmitting device to permit visual observation of the emitted light therethrough. A fine adjustment device adjusts the position of the first end of the light-transmitting device in relation to the emitted light from the material to be analyzed.

Emission spectroscopic analyzer

It is disclosed that an optical fiber conductor of glass type characterized in that the optical fiber conductor has a fiber-reinforcing layer which, at least in a desired region of the entire length thereof, is made of a charred material of an organic resin.

Optical fiber conductor and image scope using same

An optical multiconductor of the silica glass type characterized in that the multiconductor comprises 10.sup.2 to 10.sup.7 optical fibers of the silica glass type fused to one another, each of the optical fibers comprising a core made of doped silica glass and occupying at least 20% of the fiber in cross sectional area, and a cladding layer made of a kind of silica glass and formed on the core, the core having a refractive index distribution satisfying the following expression:

Optical multiconductor of silica glass type

A fiber scope of the side-viewing type includes an image guide and two light guides disposed on both sides thereof in an objective part. The fiber scope is suitable for the observation of the surface of long articles assembled with narrow gaps therebetween as in an assembly of nuclear fuel rods in a nuclear reactor and a wide field of view can be secured even if an object to be observed stands within a point-blank range of an objective part. Also a plurality of long articles can be simultaneously observed by the fiber scope or the observation can be carried out while moving the fiber scope in the scanning direction. If the fiber scope is used in a radioactive environment, highly radiation resistant optical fibers are used.

Fiber scope

Growing community of inventors

Kawanishi, Japan

Atsushi Utsumi