Abstract: A treatment method is disclosed, which includes preparing a catheter assembly by inserting an inner catheter into an outer catheter and screwing a protrusion of the outer catheter into a helical groove of the inner catheter; introducing the catheter assembly into the radial artery along a guide wire; pushing the catheter assembly along the guide wire to a target site in front of a stenosis of a blood vessel; releasing the screwing between the helical groove of the inner catheter and the protrusion of the outer catheter after a distal end of the catheter assembly reaches the target site; and causing the outer catheter to abut on at least a part of wall surfaces of a thoracic aorta and an abdominal aorta while drawing a helix and causing the treatment device to protrude from a distal end of the outer catheter at the stenosis.

Abstract: An electronic device according to the present disclosure is an electronic device on which a mounting body can be mounted so as to cover an opening communicating with inside in which an electronic component is stored, the electronic device including at least an eccentric side view in which, in a case in which a surface on which the opening is formed is set as an upper surface and a surface located on an opposite side of the upper surface is set as a lower surface, a lower end portion of the lower surface, which is located on a lowest side in a vertical direction, is located only on one side of a virtual centroidal line extending downward in the vertical direction from a center of gravity of the electronic device in any side view in a vertical posture in which the upper surface is directed upward in the vertical direction.

Abstract: A catheter assembly includes: a tubular catheter shaft; and an inner needle inserted into a lumen of the catheter shaft, the inner needle including an insertion distal end surrounded by a catheter distal end which is a distal end of the catheter shaft in an initial state of the catheter assembly in which the inner needle is inserted into the lumen of the catheter shaft. A wavelength conversion member is included in at least one of the catheter distal end or the insertion distal end, the wavelength conversion member including a wavelength conversion material that converts near-infrared light into visible light.

Abstract: A medicinal solution administration device includes: a casing; a syringe including a cylinder that is housed in the casing and filled with a medicinal solution, and a puncture needle; a needle cover disposed inside the casing and covering a distal side of the syringe, and configured to be displaced in a proximal direction relative to the casing when pressed against a puncture target; a cap that is detachably disposed on a distal end of the needle cover; and a drive unit configured to bias a gasket of the syringe toward a distal end of the casing by a plunger along with movement of the needle cover in the proximal direction. The drive unit includes a locking mechanism that blocks the plunger from moving in a distal direction in an initial state and allows the plunger to move in the distal direction in the proximal direction.

Abstract: A medical device configured to be positioned in a living body lumen, the medical device including: a rotatable shaft possessing distal and proximal portions; a plurality of struts that extend along a central axis of the rotatable shaft and arranged around the central axis with an interval, the plurality of struts having a distal end and a proximal end, and each of the plurality of struts bridging between the distal end and the proximal end; the plurality of struts being deformable in correspondence with two states, the two states being a contraction state and an expansion state; in the contraction state, the distal end and the proximal end of the plurality of struts are most distant in the axial direction; and in the expansion state, the distal end and the proximal end of the plurality of struts are brought closer in the axial direction.

Abstract: A blood vessel visualization device for visualizing a blood vessel of a living body in a site to be visualized that includes a first surface and a second surface on a side opposite the first surface, includes: an attachment portion attachable to and detachable from the site to be visualized; and an irradiation unit including a light source unit for irradiating the first surface with near-infrared light. The attachment portion includes a wavelength converter including a wavelength conversion material that converts the near-infrared light into visible light, the attachment portion being fixable to the site to be visualized in a state in which the wavelength converter is in contact with the second surface.

Abstract: A blood vessel visualization member for visualizing a blood vessel of a living body includes: a sheet body that is affixable to a surface of a site to be visualized, the sheet body including: a wavelength converter including a wavelength conversion material that converts near-infrared light into visible light, and an adhesive portion provided on the wavelength converter.

Abstract: A medical connector includes: a housing comprising a male connector attachment/detachment part, the housing defining a liquid flow path; and a valve that is vertically movable with respect to the housing between a closed position for closing the male connector attachment/detachment part, and an open position in which a flow path in a male connector communicates with the liquid flow path, by the valve being pressed down from the closed position by the male connector against a biasing force. The valve comprises a head portion that closes the male connector attachment/detachment part when the valve is at the closed position, and a body portion that is connected to a bottom end of the head portion and receives the biasing force. A Young's modulus of the body portion is larger than a Young's modulus of the head portion.

Abstract: A blood glucose measurement reagent includes glucose dehydrogenase; a chromogenic indicator; and an aromatic hydrocarbon having at least one sulfonic acid group.

Abstract: An information processing method, an infusion pump, an information processing apparatus, a computer program, and an information processing system are provided for predicting a failure in an infusion pump. A duty ratio of a voltage to be applied to a motor included in the infusion pump that delivers liquid delivery while maintaining a constant flow rate is recorded, whether or not there is a risk of occurrence of a failure in the infusion pump is determined based on a history of the duty ratio, and, in a case in which there is a risk of occurrence of a failure, prediction of occurrence of the failure is output.

Abstract: An oxygen measurement device constituting an oxygen measurement system includes a urethral catheter and an oxygen sensor main body. The urethral catheter has a shaft in which a urethral catheter lumen that enables circulation of urine flowed in via a urethral catheter port from inside a bladder is formed; and has a hub in which a urine lumen that is provided at a proximal end of the shaft and communicates with the urethral catheter lumen is formed. The oxygen sensor main body is provided on the hub in a manner capable of being brought into contact with urine circulating in the urine lumen, and detects oxygen in the urine. The shaft also includes a gas permeation suppressing part that suppresses gas permeation into the urethral catheter lumen by way of the shaft.

Abstract: A method for producing a parison for a balloon catheter, a method for producing a balloon catheter, and a device for producing a parison for a balloon catheter, by which a shape of the parison can be stably formed by lowering a heating temperature of a tube. A method for producing a parison for a balloon catheter includes: fixing a pair of fixing portions of a thermoplastic tube extending along a major axis direction; heating a pair of heating portions located between the pair of fixing portions; cooling at least a part of a portion between the pair of heating portions of the tube during the heating a pair of heating portions located between the pair of fixing portions; and pulling the tube in a direction in which the pair of fixing portions are separated from each other, and stretching the pair of heating portions.

Abstract: An infusion pump includes: a main body unit including a tube attachment unit to which an infusion tube is attachable substantially horizontally; and a door unit that is openable and closable with respect to the main body unit and covers the tube attachment unit in a state of being closed with respect to the main body unit. The tube attachment unit includes: an indwelling portion configured to place the infusion tube on an upper side of the main body unit in a height direction, and a first protruding portion that extends from the indwelling portion toward a lower side in the height direction of the main body unit, and includes a slope in which a degree of protrusion from the main body unit is larger at a position closer to the lower side in the height direction.

Abstract: A method for producing a parison for a balloon catheter, a method for producing a balloon catheter, and a device for producing a parison for a balloon catheter, by which a shape of the parison can be stably formed by lowering a heating temperature of a tube. A method for producing a parison for a balloon catheter includes: fixing a pair of fixing portions of a thermoplastic tube extending along a major axis direction; heating a pair of heating portions by bringing a heat source close to a surface of the tube or bringing the heat source into contact with the surface of the tube, the pair of heating portions being located between the pair of fixing portions; and pulling the tube in a direction in which the pair of fixing portions are separated from each other, and stretching the pair of heating portions.

Abstract: A catheter assembly includes: a catheter including a distal end portion, and a body portion that is continuous with a proximal end of the distal end portion and extends along an axial direction; a hollow inner needle that has a needle tip and is removably inserted into the catheter; and a guide wire that is inserted into the inner needle so as to be movable back and forth and that is deliverable from the needle tip. The distal end portion of the catheter includes a constituent portion that is harder than, has a higher lubricity than, or has a higher elasticity than the body portion at at least a part of a surface of the distal end portion.

Abstract: A puncture needle for medical use includes: a main body that is rod-shaped and that comprises a distal end portion comprising a blade surface. The blade surface includes: a first blade surface portion that extends so as to incline with respect to a central axis of the main body, and a second blade surface portion that is formed on a back side of the first blade surface. A blade edge having a needle tip at one end is formed by a ridge line where the first blade surface portion meets the second blade surface portion. The first blade surface portion is constituted by a concave surface that is concave in a side view of the main body.

Abstract: A light irradiation device includes: a flow channel through which blood or a blood component flows; and an LED lamp which irradiates the blood or the blood component flowing through the flow channel with light so as to inactivate a virus included in the blood or the blood component, in which a multilayer structure in which a plurality of the flow channels is arranged in parallel is formed.

Abstract: A medical device and a treatment method are disclosed which allow easy formation of a hole using energy and easy expansion of the formed hole without loss of tissue and allow an increase in working efficiency. A medical device is disclosed for forming a hole in a tissue in a living body and expanding the hole, the medical device including: a dilator having a first lumen formed inside and having a tip portion in which the first lumen opens on a distal side; and an output unit that outputs energy for denaturing the tissue and forming a hole, in which the output unit is disposed on a tip portion and formed discontinuously in the circumferential direction of the tip portion, and the outer diameter of the tip portion gradually decreases toward the distal side.

Abstract: A method and device handle having a slide assembly are disclosed for controlling rotational speed of a catheter assembly under various rotational loads. The method includes setting a first current limit in a processor, activating the catheter assembly to rotate, calculating a current value in rotational period of a first current limit, updating a second current limit from the first current limit, and wherein the second current limit is lower than the first current limit.

Abstract: An infusion pump includes: a displacement sensor including: a groove portion to which an infusion tube is attachable, a detection surface exposed to the groove portion, the displacement sensor being configured to detect a pressure applied to the detection surface, a first mask portion that covers a first end of the detection surface in a width direction of the groove portion, and a second mask portion that covers a second end of the detection surface in the width direction of the groove portion.