Abstract: A blood pump includes a blood supply mechanism; a motor having a stator, a rotor and a shaft; a base body; a casing; a fixed side slide member having a first slide surface and fixed to the base body; and a rotary side slide member. A second insertion hole allows the shaft to pass therethrough is in the rotary side slide member. The shaft is fitted into the second insertion hole between the fixed side slide member and the blood supply mechanism. The second slide surface is slidable on the first slide surface in contact with the first slide surface by rotating together with the blood supply mechanism and the shaft A center of the core is at a position more to a +z direction side than a center (CM) of a permanent magnet.

Abstract: A blood pump includes a blood supply mechanism; a motor having a stator, a rotor and a shaft; a base body; a casing; a fixed side slide member having a first slide surface and fixed to the base body; and a rotary side slide member. A second insertion hole allows the shaft to pass therethrough is in the rotary side slide member. The shaft is fitted into the second insertion hole between the fixed side slide member and the blood supply mechanism. The second slide surface is slidable on the first slide surface in contact with the first slide surface by rotating together with the blood supply mechanism and the shaft A center of the core is at a position more to a +z direction side than a center (CM) of a permanent magnet.

Abstract: Provided is a bleeding conduit assembly attached to a heart and used for introducing blood in the heart into a ventricular assist pump from the heart. The bleeding conduit assembly includes: a bleeding conduit made of a porous material; and a cuff mounted on one end portion of the bleeding conduit, wherein a first gas non-permeable material layer is formed on an outer peripheral surface of the bleeding conduit. The bleeding conduit assembly according to the present invention can overcome at least any one of three drawbacks which occur attributed to the presence of an inflow cannula in a conventional bleeding conduit assembly.

Abstract: A cannula system for providing a fluid connection to a heart includes a cannula having an end configured for connection to a myocardium of a heart. The cannula defines an inlet and includes a first cuff extending around the cannula so as to cover a substantial portion of an exterior surface of the cannula proximate the inlet. Additionally, a second cuff may be included that extends around the first end of the cannula adjacent a distal end of the first cuff.

Abstract: A cable protector includes: a helical portion where a helical strip-like member surrounds a barrel portion of a cable, an equipment housing mounting portion configured to surround the barrel portion between a rear end portion of the strip-like member and an equipment housing, and a distal cylindrical portion configured to surround the barrel portion. The equipment housing mounting portion includes a mounting plate and a cylindrical body. The equipment housing mounting portion forms a notched portion thereon for allowing entering and exiting of the barrel portion into and from the mounting plate. The distal cylindrical portion has an opening/closing portion changeable between a surrounding state where the distal cylindrical portion surrounds the barrel portion and a state which allows entering and exiting of the barrel portion into and from the distal cylindrical portion.

Abstract: A blood pump includes: a base body; a casing fitted thereon; a blood supply mechanism in a pump chamber surrounded by the base body and the casing; and a drive element. The base body has: a first contact surface to be in contact with the casing; and a first engaging portion including a first tapered portion inclined inward and downward. The casing has: a casing body having a second contact surface corresponding to the first contact surface; and a second engaging portion at an edge of the casing and including a second tapered portion inclined toward an r direction as the second tapered portion extends upward. The second engaging portion engages with the first engaging portion, and the second contact surface of the casing is pressed into contact with the first contact surface of the base body to prevent a gap between the first and second contact surfaces.

Abstract: A cable protector includes: a helical portion where a helical strip-like member surrounds a barrel portion of a cable, an equipment housing mounting portion configured to surround the barrel portion between a rear end portion of the strip-like member and an equipment housing, and a distal cylindrical portion configured to surround the barrel portion. The equipment housing mounting portion includes a mounting plate and a cylindrical body. The equipment housing mounting portion forms a notched portion thereon for allowing entering and exiting of the barrel portion into and from the mounting plate. The distal cylindrical portion has an opening/closing portion changeable between a surrounding state where the distal cylindrical portion surrounds the barrel portion and a state which allows entering and exiting of the barrel portion into and from the distal cylindrical portion.

Abstract: 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.

Abstract: 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.

Abstract: A ventricular assist blood pump of the present invention includes: a rotational part having an impeller; and a housing which houses the rotational part therein. In the ventricular assist blood pump, a difference between a maximum flow rate and a minimum flow rate of a liquid in a state where the ventricular assist blood pump 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 blood pump is not connected to the liquid-discharge source. A ventricular assist blood pump of the present invention can suppress the degree at which the health of a user deteriorates during long-term use compared to a conventional ventricular assist blood pump.

Abstract: The present invention relates to an inflow cannula for blood circulatory assist devices, having a robust structure and possessing a thrombus anchoring effect. Furthermore, the inflow cannula for blood circulatory assist devices does not deform or exhibit loss of dimensional accuracy during the manufacture process. These features are achieved by a porous structure formed of one or more linear elements or of a porous shaped article.

Abstract: A ventricular assist blood pump of the present invention includes: a rotational part having an impeller; and a housing which houses the rotational part therein. In the ventricular assist blood pump, a difference between a maximum flow rate and a minimum flow rate of a liquid in a state where the ventricular assist blood pump 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 blood pump is not connected to the liquid-discharge source. A ventricular assist blood pump of the present invention can suppress the degree at which the health of a user deteriorates during long-term use compared to a conventional ventricular assist blood pump.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: In a flow rate estimation device of a blood pump, a general flow rate estimation formula which includes a correction term is formed based on a plurality of blood pumps. Measured data obtained from an objective blood pump implanted inside a patient is substituted into the correction term, thus forming a flow rate estimation formula of the objective blood pump. The flow rate Q of the objective blood pump is estimated based on the flow rate estimation formula and the values of the rotational speed N and the consumption current I of the motor of the objective blood pump, and the attribute data Z of the blood of the patient.

Abstract: The present invention relates to an inflow cannula for blood circulatory assist devices, having a robust structure and possessing a thrombus anchoring effect. Furthermore, the inflow cannula for blood circulatory assist devices does not deform or exhibit loss of dimensional accuracy during the manufacture process. These features are achieved by a porous structure formed of one or more linear elements or of a porous shaped article.

Abstract: In a flow rate estimation device of a blood pump, a general flow rate estimation formula which includes a correction term is formed based on a plurality of blood pumps. Measured data obtained from an objective blood pump implanted inside a patient is substituted into the correction term, thus forming a flow rate estimation formula of the objective blood pump. The flow rate Q of the objective blood pump is estimated based on the flow rate estimation formula and the values of the rotational speed N and the consumption current I of the motor of the objective blood pump, and the attribute data Z of the blood of the patient.

Abstract: In a flow rate estimation method of a blood pump, a general flow rate estimation formula which includes a correction term is formed based on a plurality of blood pumps. Measured data obtained from an objective blood pump implanted inside a patient is substituted into the correction term, thus forming a flow rate estimation formula of the objective blood pump. The flow rate Q of the objective blood pump is estimated based on the flow rate estimation formula and the values of the rotational speed N and the consumption current I of the motor of the objective blood pump, and the attribute data Z of the blood of the patient.

Abstract: In a flow rate estimation method of a blood pump, a general flow rate estimation formula which includes a correction term is formed based on a plurality of blood pumps. Measured data obtained from an objective blood pump implanted inside a patient is substituted into the correction term, thus forming a flow rate estimation formula of the objective blood pump. The flow rate Q of the objective blood pump is estimated based on the flow rate estimation formula and the values of the rotational speed N and the consumption current I of the motor of the objective blood pump, and the attribute data Z of the blood of the patient.