摘要:
Provided is a vinyl polymer of a sulfonated monomer having a basic skeleton represented by the following formula (1), wherein x is 1 to 20 and n is 10 to 10,000.Also provided is a novel hydrocarbon vinyl polymer aimed at providing a hydrocarbon solid polymer electrolyte which can become a substitute for a fluorine electrolyte, and which has chemical and physical properties sufficient for practical use, yet can be produced at a low cost. Additionally, provided is a polymer electrolyte membrane suitable as the ion-exchange membrane of a solid polymer fuel cell by employing the polymer of a sulfonated vinyl monomer which has excellent film-forming properties and a large ion-exchange capacity (EW).
摘要:
A patch for preventing carburization, nitriding or oxidation comprises:a film comprising a heat-fusible or heat-meltable particulate material having an anti-carburizing, anti-nitriding or anti-oxidizing effect and a heat-decomposable resin as a binder; anda heat-resistant silicone pressure sensitive adhesive, which is decomposed at a carburizing, nitriding or oxidizing temperature, provided on one side of the film.
摘要:
In a catheter comprising a proximal inner tube having a reinforcing layer applied thereto and a distal inner tube made of a material having different physical properties from those of the proximal inner tube, the proximal and distal inner tubes are axially integrally connected such that the outer surface of the proximal inner tube is substantially smooth and continuous to that of the distal inner tube, and a sheath continuously covers the proximal and distal inner tubes. The catheter is produced by axially integrally joining proximal and distal inner tubes and continuously covering the interconnected tubes with a sheath.
摘要:
An apparatus for measuring cardiac output includes a first system for obtaining cardiac output based on a thermal attenuation method and a second system for obtaining blood flow velocity based on a thermal-type flowrate measurement. A constituent value is obtained from the cardiac output and blood flow velocity, and the constituent value is held. The apparatus also includes a computing unit for computing cardiac output from the already obtained constituent value and a blood flow velocity obtained at the time of measurement. The constituent value can be updated by re-starting the first system.
摘要:
A catheter for the repair of an injured blood vessel, characterized by comprising a multiple-lumen type catheter tube having at least two tubular cavities, at least one dilating member disposed in the distal portion of said catheter tube and adapted to communicate with one of said tubular cavities, a lateral hole for the injection of a blood coagulation accelerant disposed on said catheter tube at the proximal side than said dilating member side and adapted to communicate with the other tubular cavity, and a hub having a plurality of flow conduit communicating severally with said tubular cavities of said catheter tube and adapted to communicate with the proximal portion of said catheter tube.
摘要:
A guide wire for a catheter having a body portion comparatively high in rigidity and a distal end portion comparatively flexible.At least portions of the body portion and the distal end portion are formed of a super-elastic metallic member. At least portions of inner core portions on the body portion's side and on the distal end portion's side, both of which are coated by a plastic, are formed of the super-elastic metallic member, and at least a portion of the inner core portion on the distal end portion's side is made smaller in cross-section than the inner core portion on the body portion's side.In consequence, the catheter can be reliably and readily introduced to a predetermined position.
摘要:
A catheter introduced into the pulmonary artery for use in measuring cardiac output or blood flow velocity includes temperature sensing device including a temperature sensing element for sensing the temperature of blood in the pulmonary artery diluted by an indicator liquid infused for measurement of cardiac output based on a thermodilution method, and a self-heating thermistor for sensing a signal relating to blood flow velocity near the temperature sensing element, the signal being an equilibrium temperature sensed by the thermistor. The catheter is connected to a cardiac output measurement system adapted to measure cardiac output on the basis of the thermodilution method, measure the blood flow velocity which prevails when the cardiac output is measured, and obtain a parameter which links this blood flow velocity to the cardiac output measured in accordance with the thermodilution method. Once the parameter is found, merely measuring the blood flow velocity enables cardiac output to be determined from the flow velocity and the parameter.
摘要:
A catheter having a curved distal end portion or a flexible distal end portion able to bend when being used, which comprises at least one radio opaque ring member provided on the circumference of the catheter, for indicating the direction of the end portion. The radio opaque ring member has an outer diameter approximately equal to that of the catheter, and a width (or a length along the axial direction of the catheter) L which satisfies the following relationship with the magnitude of the inner diameter D of the ring members: L.ltoreq.Dtan(.pi./8).
摘要:
A nutritive catheter is assembled by attaching a head to the distal end of a main tubing having a duct therethrough, the head being formed from a composition comprising a flexible synthetic resin and a finely divided metal material in a ratio by volume of resin to metal material of at least 2 and having a specific gravity of at least 2. An opening is provided in the head in communication with the tubing duct.