Nikkiso Company Limited

A pump device includes a chamber capable of accommodating a predetermined volume of liquid; a dividing membrane made of a flexible member attached to the chamber, the dividing membrane dividing an inside of the chamber into a first area and a second area, the dividing membrane being displaced alternately into the first area and into the second area to cause the liquid to be suctioned into and discharged from the first area and cause drain liquid to be suctioned into and discharged from the second area; and a core member provided to the dividing membrane and configured to undergo a reciprocating motion inside the chamber with activation of a motor and in such a manner as to displace the dividing membrane into the first area and into the second area.

A pump device includes a supply chamber having a supply-side accommodation part; a drain chamber having a drain-side accommodation part; dividing membranes each being a flexible member that closes a corresponding one of the supply-side accommodation part and the drain-side accommodation part, the dividing membranes displaceable relative to the supply-side accommodation part and the drain-side accommodation part to cause dialysate to be suctioned into and discharged from the supply-side accommodation part through a liquid-supply-side connection port and cause drain liquid to be suctioned into and discharged from the drain-side accommodation part through a liquid-drain-side connection port; and a pump body from which the supply chamber or the drain chamber is detachable and attachable with the supply-side accommodation part or the drain-side accommodation part being closed by the corresponding dividing membrane, the pump body including a piston to move with activation of a motor and to displace the dividing membranes.

The present teachings provide an attaching member that holds a flexible tube through which liquid related to blood purification treatment is made to flow. The attaching member is attached to a blood purification apparatus and includes an anchor portion defined by a slit in such a manner as to be separated from an other portion and to be foldable, the anchor portion being capable of anchoring the flexible tube when folded to be raised from the other portion.

A blood purification system is provided that is capable of effectively utilizing accumulated histories stored during blood purification treatment and that helps quickly and accurately grasp whether the current transition of a particular parameter is normal when compared with a transition of the particular parameter that is estimated from the histories. The blood purification system includes an extracting device capable of searching histories accumulated in a storage device and extracting, as an approximate history, a history including the particular parameter approximate to the particular parameter observed at the current time in the current session of blood purification treatment; an estimating device that estimates a transition of the particular parameter to be observed after the current time in the current session of blood purification treatment from the approximate history extracted by the extracting device; and a display control device capable of displaying the transition of the particular parameter estimated by the estimating device and the transition of the particular parameter observed in the current session of blood purification treatment simultaneously on a display.

A blood purification system is provided that is capable of effectively utilizing histories stored during blood purification treatment and that helps realize history search suitable for individual purposes of extraction, thereby increasing the reliability of information to be extracted and displayed. The blood purification system includes an extracting unit that searches for and extracts any history satisfying a predetermined condition from among histories stored in a storage unit, an excluding unit f that excludes any of the histories stored in the storage unit from an object of search performed by the extracting unit, and a display control unit that controls various pieces of information based on the history extracted by the extracting unit to be displayed on a display unit.

A medical device includes a case obtained by mating a liquid-phase-portion case and a gas-phase-portion case to each other, a membrane member as an elastic member with which a liquid-phase portion covered by the liquid-phase-portion case and a gas-phase portion covered by the gas-phase-portion case are separated from each other, fixing parts and at which the liquid-phase-portion case and the gas-phase-portion case that are mated to each other are fixed to each other, holding surfaces and between which a peripheral edge of the membrane member is held, and a sealing part that seals the entirety of the peripheral edge of the membrane member held between the holding surfaces and. The medical device has a releasing part that releases the pressure in an air gap produced between the sealing part and the fixing parts.

A blood purification device including: piping, a plurality of sensors, and a liquid chemical identification unit. The plurality of sensors of different detection types that are provided on the piping. The liquid chemical identification unit that identifies a type of a cleaning/disinfection liquid chemical flowing through the piping by using the plurality of sensors. The liquid chemical identification unit is configured to be able to identify types of the liquid chemicals of at least not less than a number of the plurality of sensors by using the plurality of sensors. The liquid chemical identification unit selects all or part of the plurality of sensors according to the type of the liquid chemical which should be used for cleaning/disinfection and, based on detection results from the selected all or part of sensors, identifies whether or not it is a liquid chemical which should be used for the cleaning/disinfection.

A blood purification apparatus includes a blood circuit that allows a patient's blood to extracorporeally circulate; a blood purifier between the arterial blood circuit and the venous blood circuit having a blood flow route through which the blood extracorporeally flows and a dialysate flow route through which dialysate flows, the blood flow route and the dialysate flow route being separated from each other by a blood purification membrane; an ultrafiltration unit that filters out water from the blood in the blood flow route through the blood purification membrane and drains the water through the dialysate flow route; and a substitution-fluid supply unit that supplies substitution fluid. The blood purification apparatus includes a plasma-flow-rate-acquiring unit that acquires a plasma flow rate or a correlation value of plasma flow rate with reference to a blood concentration detected from the patient's blood and a plasma total protein detected from the blood.

A flow velocity determining apparatus ( 10 ) includes an irradiating unit ( 20 ) that emits irradiation light (L 1 ) toward a liquid mixture (BL) which contains a non-spherical solid (BC) and a liquid (BP) and flows through a flow path (TB), a detecting unit ( 30 ) that detects reflected light (L 2 ) emitted by the irradiating unit ( 20 ) and reflected by the liquid mixture (BL) flowing through the flow path (TB), the detecting unit ( 32 ) being disposed on at least one side of an optical axis (L 2 A) of the reflected light (L 2 ) when seen in a plan view of an imaginary plane including an optical axis (L 1 A) of the irradiation light (L 1 ) and the optical axis (L 2 A) of the reflected light (L 2 ), and a determining unit ( 40 ) that determines a flow velocity of the liquid mixture (BL) by using a light amount of the reflected light (L 2 ) detected by the detecting unit ( 32 ).

A pressure detector that includes a case connectable to a flow route for liquid, and a membrane member attached inside the case and with which a liquid-phase portion to be supplied with the liquid in the flow route and a gas-phase portion to be supplied with gas are separated from each other, the membrane member being displaceable in accordance with a pressure of the liquid supplied to the liquid-phase portion, the pressure detector detecting the pressure of the liquid in the flow route by detecting a pressure in the gas-phase portion. The pressure detector includes an inlet port including a connecting portion connectable to the flow route for the liquid, and a flow-route portion through which the liquid flows into an inlet opening of the liquid-phase portion; and an outlet port including a connecting portion connectable to the flow route for the liquid, and a flow-route portion through which the liquid having flowed into the liquid-phase portion is discharged from an outlet opening. At least one of the flow-route portion of the inlet port and the flow-route portion of the outlet port is configured such that an incoming direction or an outgoing direction of the liquid is inclined with respect to an attaching plane defined for the membrane member.