Sun Medical Technology Research Corporation

Nagano-shi, Japan

Sun Medical Technology Research Corporation

Nagano-shi, Japan

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Patent
Sun Medical Technology Research Corporation | Date: 2014-12-05

Provided is a slide device which includes a fixed-side slide member having an annular-shaped first slide surface, and a rotary-side slide member having an annular-shaped second slide surface, with the slide device being configured such that the first slide surface and the second slide surface are positioned opposite to each other, and an outer peripheral side of the fixed-side slide member and an outer peripheral side of the rotary-side slide member are brought into contact with a liquid containing a blood component, and a region where the first slide surface and the second slide surface face each other along the rotary-side slide member, the first slide surface and the second slide surface are brought into contact with each other on an outermost periphery of the opposite-facing region of the first and second slide surfaces.


Patent
Tohoku University and Sun Medical Technology Research Corporation | Date: 2012-04-18

Provided is a slide device which can reduce a frictional force more than a conventional slide device when used in an aqueous liquid containing a blood component. In a slide device which includes: a fixed-side slide member having a slide surface; and a rotary-side slide member having a slide surface, the slide device being used in an aqueous liquid containing a blood component in a state where the slide surface of the fixed-side slide member and the slide surface of the rotary-side slide member face each other in an opposed manner, at least one of the fixed-side slide member and the rotary-side slide member is formed of a member which is made of a material which contains silicon and has hydrate of silicon oxide on the slide surface thereof.


Patent
Sun Medical Technology Research Corporation | Date: 2013-09-30

A power source switching circuit for selectively connecting first and second power sources, at least one of which is a battery power source, to a load includes first and second power source connection parts for connection to the first and second power sources, a load connection part for connection to the load, first and second switch parts between each power source connection part and the load connection part, and a switching control part configured to perform a switch control of each switch part. Each switch part includes a plurality of FETs serially connected in the same direction such that a cathode side of a body diode is arranged on a load connection part side. The number of FETs is such that a sum of forward drop voltages of the body diodes exceeds the difference between a full charge voltage and a discharge voltage of the battery power source.


Patent
Sun Medical Technology Research Corporation | Date: 2015-07-24

Provided is an artificial heart control device for controlling a blood pump which assists flow of blood in a heart, the artificial heart control device including: a timing detection part which is configured to detect reference timing within a cardiac cycle of the heart; and a blood pump control part which is configured to control a rotational speed of the blood pump, wherein the blood pump control part controls, with reference to the reference timing detected by the timing detection part, the rotational speed of the blood pump such that the rotational speed becomes a rotational speed corresponding to a predetermined control pattern. According to the present invention, it is possible to provide an artificial heart control device, an artificial heart system and an artificial heart control method which can provide a load control optimum for the recovery of functions of a patients own heart.


Patent
Sun Medical Technology Research Corporation | Date: 2015-08-26

Provided is a power source switching circuit 100 of the present invention is a power source switching circuit for selectively connecting a first power source and a second power source where at least one of the first and second power sources is a battery power source to a load by switching the first power source and the second power source, the power source switching circuit includes: a first power source connection part and a second power source connection part configured to enable the connection of the first power source and the second power source thereto; a load connection part configured to enable the connection of the load thereto; a first switch part and a second switch part provided between each power source connection part and the load connection part; and a switching control part configured to perform a switch control of each switch part. Each switch part includes a plurality of FETs which are serially connected in the same direction such that a cathode side of a body diode is arranged on a load connection part side, and the number of plurality of FETs is the number which is determined such that a sum of forward drop voltages of the body diodes of each FET exceeds the difference between a full charge voltage and a discharge voltage of the battery power source. The power source switching circuit of the present invention can realize switching of power sources with high reliability.


Patent
Sun Medical Technology Research Corporation | Date: 2016-11-02

Provided is an artificial-blood-vessel connector which includes: a connector portion (200) which includes a first cylindrical body portion (210) where a male threaded portion (211) and a flat surface portion (212) where the male threaded portion is not formed are alternately formed along a circumferential direction of an outer peripheral surface, and a second cylindrical body portion (220) which is configured to be fitted into the inside of an artificial blood vessel (20); a ferrule (300) which includes a cylindrical portion (310) which is configured to be fitted on an outer peripheral surface of the second cylindrical body portion (220) by way of the artificial blood vessel (20) by being made to slide linearly on a surface of the artificial blood vessel (20), and a pawl plate portion (320) which is brought into contact with a flat surface portion (212) of the first cylindrical body portion (210) ; and a nut (400) which includes a female threaded portion and is configured to be connected to the connector portion (200) by making the female threaded portion threadedly engage with the male threaded portion (211) of the first cylindrical body portion (210) in a state where the nut (400) covers the ferrule (300). With such a configuration, it is possible to prevent occurrence of a damage on the artificial blood vessel and, at the same time, it is possible to increase reliability in connection between the artificial blood vessel and the artificial-blood-vessel connector.


Patent
Sun Medical Technology Research Corporation | Date: 2013-12-27

An artificial-blood-vessel connector includes: a connector portion which includes a first cylindrical body portion where a male threaded portion and a flat surface portion where the male threaded portion is not formed are alternately formed along a circumferential direction of an outer peripheral surface, and a second cylindrical body portion to be fitted inside an artificial blood vessel; a ferrule which includes a cylindrical portion to be fitted on an outer peripheral surface of the second cylindrical body portion by way of the artificial blood vessel by being made to slide linearly on a surface of the artificial blood vessel, and a pawl plate portion in contact with the flat surface portion of the first cylindrical body portion; and a nut threadedly engageable with the male threaded portion of the first cylindrical body portion in a state where the nut covers the ferrule.


Patent
Sun Medical Technology Research Corporation | Date: 2013-08-23

An auxiliary artificial heart pump drive device for driving an auxiliary artificial heart pump includes first and second pump control parts which are arranged in duplexed configuration. Each pump control part controls the auxiliary artificial heart pump by outputting a drive signal to the auxiliary artificial heart pump. Each pump control part has a means which, when a failure is detected in the pump control part, electrically cuts off a path through which the drive signal is outputted to the auxiliary artificial heart pump. According to the present invention, it is possible to provide an auxiliary artificial heart pump drive device and an auxiliary artificial heart system which exhibit high availability even when a serious failure occurs by any chance without duplexing a pump device.


Patent
Sun Medical Technology Research Corporation | Date: 2012-03-27

A ventricular assist system includes: a ventricular assist blood pump provided with a rotational part having an impeller and a housing which houses the rotational part therein; an introduction-side artificial vessel which introduces a liquid into the ventricular assist blood pump; and a delivery-side artificial vessel which delivers the liquid from the ventricular assist system. In the ventricular assist system, a difference between a maximum flow rate and a minimum flow rate of a liquid in a state where the ventricular assist system is connected to a liquid-discharge source which discharges the liquid while increasing and decreasing the flow rate of the liquid at a fixed cycle is 40% or more of a difference between the maximum flow rate and the minimum flow rate of the liquid in a state where the ventricular assist system is not connected to the liquid-discharge source.


Patent
Sun Medical Technology Research Corporation | Date: 2012-06-06

Provided is an artificial heart device (10) which can contribute to the enhancement of quality of life of patients and the reliability of the artificial heart device (10). The artificial heart device (10) includes: a blood pump (20) which assists flow of blood in a heart; a blood pump control part (100) which controls the blood pump (20); a first data processing part (142) which performs first data processing on at least one data in a first period out of operation data on the blood pump (20), operation data on a cool sealing unit which circulates lubrication fluid in the blood pump (20), biological data corresponding to a state of a patient and operation data on a battery; and a TR data storing (162) part which stores data after the first data processing in association with date-and-time data corresponding to date and time at which the data is stored each time the first period elapses, wherein the data stored in the TR data storing part (162) is retrievable.

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