摘要:
An endoscope apparatus has a side view endoscope 10 for side viewing an object in a radial direction of a distal end constitutional portion 14 and a balloon catheter 40. With an insert portion 13 of a side view endoscope 10 inserted in an insert tube 41 of the balloon catheter 40, the balloon catheter 40 is inserted into a blood vessel B. The insert tube 41 is provided at its distal end with a transparent balloon 42. This balloon 42 encloses the distal end constitutional portion 14. By feeding air (fluid) to this balloon 42, the balloon 42 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 42, thus enabling to observe the inside wall of the blood vessel B through the side view endoscope 10.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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° C. to 60 to 80° C. within 30 seconds, (ii) expanded by applying a pressure of 500 kPa or smaller to the balloon, and (iii) cooled to 45° C. or lower within 40 seconds.
摘要:
A balloon catheter comprises a connecting member, a catheter shaft, a balloon and a heat-generating member contacting a fluid in the balloon or in a distal portion of the catheter shaft. A medical apparatus have the balloon catheter. In a method for treating a living organ, a low temperature fluid is introduced and flows through the balloon, energy is introduced into the catheter shaft, is converted into heat by the heat-generating member and heats the fluid, and a living organ is heated and cooled for a medical treatment. A portion of disease is heated from 35˜40° C. to 60˜80° C. within 30 seconds, expanded by applying a pressure of 500 kPa or smaller to the balloon, and cooled to 45° C. or lower within 40 seconds. A living organ can be heated and cooled within a very short time to cure a diseased tissue. A blood vessel can be expanded without damages.
摘要:
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.
摘要:
A catheter consists of a torque transmitting portion which has rigidity sufficient for torque transmission and a flexible portion made of a material having a glass transition temperature for giving rigidity before insertion and flexibility after insertion. The torque transmitting portion maintains torque transmitting ability before, during and after insertion. The flexible portion maintains appropriate rigidity before and during insertion, which enables easy insertion, and gains flexibility after insertion by the body heat, which avoids hurting of the vulnerable insertion walls. Further, the torque transmitting portion may have a structure wherein a reinforcement of a coil or a braid of linear metal wires, specifically flat rectangular wires, is attached thereto to afford torque transmitting ability. Catheters having various functions and structures can be easily manufactured by extrusion-molding, or the like.
摘要:
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.
摘要:
The invention relates to improvements in an image guide using optical silica glass fibers. The improved image guide has a light shielding and light absorbing thin layer formed on the periphery of an optical fiber bundle consisting of a multiplicity of optical fibers to prevent incidence of external light from the peripheral surface of the bundle and to absorb and remove any scattered light as it is transmitted to parts other than the core of each optical fiber, thereby providing improved picture quality.