Abstract: A seal member and outer cylinder needle (OCN) tip part for blocking, in a fluid-tight state, both external peripheral space (EPS) end parts formed between the external-peripheral-surface of an inner needle (IN) and internal peripheral surface of an OCN, for slidably holding the IN in close contact; an opening part formed on the OCN external-peripheral-surface and for intravascular communication with the EPS; an OCN connection part for communicating between the EPS and blood circuit end; an IN connection part for communicating between the IN internal space and other blood circuit end. The movable IN positioned between the projecting position where the tip part protrudes from the OCN tip and the housed position housing the tip inside the OCN. The IN punctures the blood vessel interior while holding the projecting position, and moved to the housed position after puncture allowing blood to extracorporeally circulate via the OCN and IN connection part.

Abstract: Provided is a semiconductor light-emitting element that emits ultraviolet light with a wavelength of not more than 355 nm, the semiconductor light-emitting element including an electrode portion to be electrically connected to electrodes of a component mounting the element, wherein the electrode portion is formed by laminating any one or more of a metal providing passivity against organic acids, a metal having a lower ionization tendency than hydrogen and a conductive oxide film, and does not include a layer formed of a material that does not provide passivity against organic acids, has higher ionization tendency than hydrogen and is not a conductive oxide film.

Abstract: Provided is a flowing-water sterilization system that includes a flow channel for passing seawater to be sterilized, and a light source emitting ultraviolet light to irradiate the seawater passing through the flow channel, wherein the light source includes a light-emitting diode that emits light not including infrared light. The light-emitting diode may emit ultraviolet light that has a wavelength of not less than 250 nm and not more than 350 nm and does not include light with a wavelength of not more than 200 nm. The system may further include a cooling unit for cooling the light source.

Abstract: This extracorporeal circulation cassette is provided with: a blood circuit (10) comprising a flexible tube and having a blood tube access portion set in a predetermined position in a device; a dialysate circuit (12) comprising a flexible tube and having a dialysate tube access portion set in a predetermined position in the device; a first panel (4) and a second panel (6) that are rigid and that integrate the blood circuit (10) and the dialysate circuit (12) while sandwiching the blood circuit (10) and the dialysate circuit (12) from both sides; and a window portion formed in a part of at least one of the first panel (4) and the second panel (6), disposed in a predetermined position in the device. The blood tube access portion and the dialysate tube access portion are positioned in the window portion.

Abstract: Provided is an aquaculture system, including a water tank holding seawater and housing shellfish or fish to be cultivated, a water intake unit for introducing the seawater into the water tank, a draining unit for draining the seawater in the water tank, a first bubble generator that generates and supplies microbubbles with a diameter of not less than 10 ?m and not more than 100 ?m in the water tank, and a second bubble generator that generates and supplies nanobubbles with a diameter of not more than 10 ?m in the water tank, wherein the seawater in the water tank is exchanged by simultaneously carrying out introduction of the seawater using the water intake unit and drainage of the seawater in the water tank using the draining unit.

Abstract: This system for in-body-cavity liquid perfusion of a circulating type which circulates a liquid such as an isotonic solution perfused within the body cavity, suppresses an excessive increase in internal pressure that would lead to breakage of a hollow fiber membrane module. A drain valve is connected to a drain port of the hollow fiber membrane module. A pressure sensor measures the internal pressure of the hollow fiber membrane module. A control unit opens the drain valve on the basis of the internal pressure of the hollow fiber membrane module measured by the pressure sensor, draining foreign matter from the hollow fiber membrane.

Abstract: The method includes a process of (i) and a process of (ii) in this order. In the process of (i), the potential of a first anode and the potential of a first cathode are adjusted in an aqueous solution containing chloride ions so as to increase the concentration of free chlorine in the aqueous solution. In the process of (ii), the potential of a second anode and the potential of a second cathode are adjusted in the aqueous solution so as to decrease the concentration of free chlorine in the aqueous solution. The difference between the potential of the second anode and the potential of the second cathode in the process of (ii) is smaller than the difference between the potential of the first anode and the potential of the first cathode in the process of (i).

Abstract: Provided is a calibration method for flowmeters in a blood dialysis system, whereby highly accurate calibration can be performed even by omitting a reference flowmeter not directly relating to dialysis therapy. This calibration method comprises: while preventing outflow into a blood channel in a blood purifier, supplying a liquid to a channel, said channel passing through an inflow flowmeter and an outflow flowmeter; and then calibrating the inflow flowmeter and the outflow flowmeter correction whereby, at the time of liquid supply, a value measured by the outflow flowmeter is equalized to a value measured by inflow flowmeter.

Abstract: A blood purification device for purifying blood drawn from a body and then returning the blood into the body, including: a pump provided midway along a fluid path through which blood or a dialysis fluid flows; a valve that is provided midway along the fluid path and closes or opens a part of the fluid path; and a control unit that causes a blood purification process of passing the blood or the dialysis fluid through the fluid path for blood purification, a priming process of driving the pump and the valve to supply a priming fluid to the fluid path before the blood purification processing, and a pressure reduction process of reducing pressure in a gap in the fluid path to a negative pressure state before supply of the priming fluid.

Abstract: The present invention provides an operation field-securing device that secures an operation field by being deployed within the body cavity. The operation field-securing device includes at least three elongated parts extending radially in a deployed state; and curved parts, the number of which is the same as that of the elongated parts. Each pair of the two adjacent elongated parts is connected at their one ends by the curved part. Each of the curved parts is convex toward a side opposite to the elongated part. In the deployed state, the curved parts are arranged circumferentially. By deforming the curved parts, the operation field-securing device is capable of being brought into either one of a contracted state where a distance between the adjacent elongated parts is shortened by making the elongated parts close to each other and the deployed state where the distance between the elongated parts is expanded.

Abstract: This dialysis-fluid supply system, which mixes a diluent and at least two drugs to generate a dialysis fluid, and outputs said dialysis fluid, is provided with: a mixing tank which mixes the drugs and the diluent to generate the dialysis fluid; a storage tank which stores and outputs the dialysis fluid generated by the mixing tank; a transport mechanism for transporting, to the storage tank, the dialysis fluid generated by the mixing tank; an output mechanism for outputting, to a dialysis device, the dialysis fluid stored in the storage tank; and a control unit for controlling the driving of the transport mechanism and the output mechanism.

Abstract: This dialysis-fluid supply system, which mixes a diluent and at least two drugs to generate a dialysis fluid, and outputs said dialysis fluid, is provided with: two tanks which mix the drugs and the diluent to generate the dialysis fluid, and store said dialysis fluid; a water supply device and a drug supply device which supply the diluent and the drugs to each of the tanks; mechanisms for outputting, to a dialysis device, the dialysis fluid stored in each of the tanks; and a control unit for controlling the driving of these. During output of the dialysis fluid from at least one of the tanks, the control unit sequentially switches the supply destination tank for the drugs and the diluent, and the dialysis-fluid output source tank, between the two tanks in order to generate the dialysis fluid in the other tank.

Abstract: A biological component-measuring unit comprises a substrate detachably mountable on a medical support device; fluid channels disposed on the substrate, the fluid channels comprising a biological component-measuring channel; and an engaging mechanism configured to detachably engage with the medical support device so that the biological component-measuring unit is attached to and detached from the medical support device. The biological component-measuring channel includes: a first fluid transferring section disposed on the biological component-measuring channel and configured to be engaged with and actuated by a first fluid transfer structure disposed on the medical support device and transfer a sample fluid in one direction in cooperation with the first fluid transfer structure, when the biological component-measuring unit is mounted on the medical support device.

Abstract: The method includes a process of (i) and a process of (ii) in this order. In the process of (i), the potential of a first anode and the potential of a first cathode are adjusted in an aqueous solution containing chloride ions so as to increase the concentration of free chlorine in the aqueous solution. In the process of (ii), the potential of a second anode and the potential of a second cathode are adjusted in the aqueous solution so as to decrease the concentration of free chlorine in the aqueous solution. The difference between the potential of the second anode and the potential of the second cathode in the process of (ii) is smaller than the difference between the potential of the first anode and the potential of the first cathode in the process of (i).

Abstract: When sucking a fluid within a body cavity, foreign matter included in the fluid which exceeds the filtering diameter of a filtering apparatus may cause clogging of the filtering apparatus. Another concern is that a body cavity membrane getting stuck to a suction port of a suction tube may lead to the suction port being closed off. In response to such problems as these, provided is a suction apparatus, comprising a suction tube, and a filter member. The suction tube has side holes formed in a tube wall on a body cavity-side tail end part. The filter member has a tubular cap shape and covers a tail end aperture of the suction tube and the side holes, is formed from a foam body with an average aperture opening of 500-1000 ?m, and has a thickness of 7.5 mm or more.

Abstract: In a light irradiation apparatus, an elongated body has flexibility that allows for elastic restoration. An LED chip is closely fixed to a tip portion of the elongated body and emits ultraviolet light. A cover unit covers the LED chip so as to protect the LED chip and allows the ultraviolet light emitted by the LED chip to pass through the cover unit. A conductive unit extends in a longitudinal direction of the elongated body and passes electric current for allowing the LED chip to emit light. An insulation unit covers the conductive unit so as to ensure electrical insulation of the conductive unit.

Abstract: This system for in-body-cavity liquid perfusion of a circulating type which circulates a liquid such as an isotonic solution perfused within the body cavity, suppresses an excessive increase in internal pressure that would lead to breakage of a hollow fiber membrane module. A drain valve is connected to a drain port of the hollow fiber membrane module. A pressure sensor measures the internal pressure of the hollow fiber membrane module. A control unit opens the drain valve on the basis of the internal pressure of the hollow fiber membrane module measured by the pressure sensor, draining foreign matter from the hollow fiber membrane.

Abstract: A lamination device 30 includes a first charger 40 for emitting charged particles toward an uppermost surface of a battery stack 10 of a positive electrode sheet 12, a negative electrode sheet 14, and a separator sheet 16 that are stacked on a stacking stage 32. As a result of the emission of charged particles, the battery stack 10 and one of a positive electrode sheet 12, a negative electrode sheet 14, and a separator sheet 16 that is to be stacked on the stack 10 are electrostatically attracted to each other.