Abstract: An assembly of the present invention for a syringe includes a piercing needle-attached barrel having a barrel body and a hollow piercing needle fixed to the barrel body and a seal cap for sealing a piercing needle tip. The seal cap has a hollow part and a pierceable part into which the piercing needle tip inserted into the hollow part can be pierced. The seal cap is water vapor permeable and placed in a state in which the piercing needle tip has been pierced into the pierceable part. At least the pierceable part of the seal cap is formed of an elastic material containing silicone rubber as a main material thereof, silicone particles, and a lubricant.

Abstract: An image diagnosis apparatus determines an effective pulse based on a pulse signal corresponding to the rotation of an imaging core from a pulse signal corresponding to an A line indicating a period of a light source and switches the polarization state of light transmitted from an optical transceiver according to the effective pulse. According to the effective pulse, the image diagnosis apparatus acquires a signal of interference light between the light received by the optical transceiver and reference light.

Abstract: A syringe includes a gasket, a barrel, and a plunger. The plunger includes a helical rib provided at a head portion, and the gasket includes a threaded engagement portion configured to threadedly engaged with the helical rib, a plunger-retaining annular rib, and an accommodation portion for accommodating a part of the plunger at which the helical rib is formed. The annular rib includes a rib absent portion for guiding, to the accommodation portion, the helical rib reaching the annular rib. The gasket further includes an intermediate annular rib provided at a part on a proximal side of the retaining annular rib and a part defined on a side of the distal end of the helical projection, between a distal side annular rib and a proximal side annular rib.

Abstract: A syringe assembly includes a prefilled syringe and a cap. A cap body is configured to be displaced from a first position where a viewing portion is positioned in a cylindrical main body to a second position where the viewing portion protrudes in a distal end direction from an opening of the cylindrical main body. When a mounting tube portion of the cap removed from a syringe body is brought close to a nozzle portion of the syringe body, the cap body is pressed in the distal end direction by the nozzle portion, thereby being displaced from the first position to the second position, and the appearance of an outer peripheral portion of the viewing portion changes.

Abstract: A liquid medicine filling device includes a container mounting unit, a liquid delivery flow conduit, a ventilation flow conduit, a syringe, a connection flow conduit, a first flow path switching unit, and a second flow path switching unit. The first flow path switching unit may switch between a flow path for filling through which the syringe communicates with a liquid medicine container via the ventilation flow conduit and a flow path for air removal through which the syringe communicates with the connection flow conduit via the ventilation flow conduit. The second flow path switching unit may switch between a flow path for filling through which the liquid medicine container communicates with the liquid medicine storage unit via the liquid delivery flow conduit and a flow path for air removal through which the liquid medicine storage unit communicates with the connection flow conduit via the liquid delivery flow conduit.

Abstract: A drug solution administration device includes: an injection unit configured to inject a drug solution in vivo; a container; a push-out mechanism configured to allow the drug solution stored inside the container to flow into the injection unit; a sealing member attached to the push-out mechanism and pressed against a wall surface of the containing space; a drive mechanism configured to generate a drive force for moving the push-out mechanism back and forth; and a control unit is configured such that, when a predetermined time has passed after the control unit controls the drive mechanism to stop operation of the drive mechanism, the control unit controls the drive mechanism to move the push-out mechanism and to shift a position of the sealing member relative to the wall surface of the containing space.

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 medical liquid administration device includes a flowing portion including a flow path through which a medical liquid is to flow; a medical liquid storage communicating with the flowing portion, the medical liquid storage storing the medical liquid that is to be fed to the flowing portion; a drive mechanism comprising a motor configured to generate a driving force for feeding the medical liquid stored in the medical liquid storage to the flow path; a detection unit configured to detect whether an operating state of the drive mechanism is within in preset range; and a controller configured to determine blockage in the flowing portion and failure in the drive mechanism.

Abstract: To provide a stent delivery system configured to prevent twisting of a strut during expansion of a stent. A balloon has a plurality of limb portions folded at a plurality of folding pleats in a deflated state. The limb portions are folded in a first circumferential direction to surround the shaft as seen from a proximal end side of an axial direction of the shaft. The strut of the stent has helical portions formed in a helical shape extending along a second circumferential direction opposite to the first circumferential direction as seen from the proximal end side of the axial direction with being centered on an axis extending along the axial direction of the shaft.

Abstract: Provided is a component measuring apparatus configured to determine a functional form that describes wavelength characteristics of a variation attributable to scattering (S (?)). The apparatus then determines unknown one or more coefficients (p, q) based on a first relational expression that involves a variation attributable to absorption (H (?1)) and a group of second relational expressions that do not involve variations attributable to absorption (H (?2a), H (?2b), H (?2c)). The apparatus then corrects an absorbance measured at an arbitrary wavelength (?) using a function where the one or more coefficients (p, q) are applied to the functional form so as to reduce or eliminate at least the effects of scattering of light.

Abstract: A balloon coating method for forming a coating layer containing a water-insoluble drug on the outer surface of a balloon of a balloon catheter. The method includes applying a first rotation force to the balloon catheter proximal to the balloon of the balloon catheter and applying a second rotation force to the balloon catheter distal to the balloon of the balloon catheter. The first rotation speed is the same as the second rotation speed. The method includes applying a coating solution containing the drug to the outer surface of the balloon from a dispensing tube while gradually moving the dispensing tube in the axial direction and simultaneously applying the first and second rotation forces to rotate the balloon catheter around the longitudinal axis of the balloon catheter.

Abstract: A medical device is disclosed for cutting an object in a body lumen, including: a rotatable drive shaft; and a rotatable rotation structure which is connected to the drive shaft, the rotation structure including: a proximal portion; a distal portion; and a constricted portion provided between the proximal portion and the distal portion, the constricted portion including: a first tapered portion which includes a first cutting portion and decreases in diameter toward the distal side; a second tapered portion which includes a second cutting portion and decreases in diameter toward the proximal side; and a bottom portion which is provided between the first tapered portion and the second tapered portion.

Abstract: A medical device is disclosed for cutting an object in a body lumen, including: a rotation structure which includes a cutting portion; a first shaft which is connected to a center shaft of the rotation structure and drives the rotation of the rotation structure; and a second shaft which is formed in a tubular shape surrounding the first shaft, wherein the second shaft is bendable at two positions including a first curved portion and a second curved portion located more distal than the first curved portion, and the second shaft is rotatable in a state in which a proximal side of the first curved portion and a distal side of the second curved portion of the second shaft are kept substantially parallel to each other.

Abstract: A balloon including an outer circumferential portion which dilates to form a hollow circular cross-section and deflates when the internal pressure is reduced, an inner circumferential portion positioned inside the outer circumferential portion, and support portions positioned between the outer circumferential portion and the inner circumferential portion to support deflating the outer circumferential portion while compressing the outer circumferential portion. The support portions form first compression portions, which have a high compressive strain, and second compression portions, which have a compressive strain lower than the first compression portions.

Abstract: A rocuronium bromide injection solution-prefilled syringe of the present invention includes a syringe comprising an outer cylinder made of synthetic resin, a gasket which is accommodated inside the outer cylinder and liquid-tightly slidable inside the outer cylinder, and a seal member for sealing a distal end opening of the outer cylinder; and a rocuronium bromide injection solution filled inside the syringe. The gasket is formed by vulcanized chlorinated butyl rubber added calcined clay, and said calcined clay is only added as an inorganic filler classified as an inorganic reinforcing agent and an inorganic filling agent.

Abstract: A medical device for cutting an object S in a body lumen is disclosed, which includes: a rotatable drive shaft; a tubular outer sheath configured to accommodate the drive shaft in a rotatable manner; a rotation structure, the rotation structure comprising an accommodation portion configured to be disposed inside the outer sheath; an exposed portion, the exposed portion being located at a distal side of the accommodation portion and is provided with a cutting portion, in which the accommodation portion is provided to be rotatable by the drive shaft, and a side surface of the accommodation portion and a side surface of the exposed portion have a groove portion, the groove portion extending from the accommodation portion to the exposed portion.

Abstract: A needle assembly includes: a retaining portion; and an elastic member that includes a close contact portion that closely contacts and retains the needle tube such that the needle tube protrudes toward a fitting opening, and a deformation portion that extends from the close contact portion toward the fitting opening and is configured to deform when the drug ejection portion comes into contact with the elastic member, and which is provided in a fitting portion. Further, the length of the deformation portion is in a range of 35% or more and 50% or less with respect to the length of the elastic member, and the length of a portion of the needle tube which protrudes from the close contact portion toward the fitting portion is in a range of 45% or more and 245% or less with respect to the deformation portion.

Abstract: A catheter assembly includes a hollow catheter; a catheter hub to which the catheter is fixed; an inner needle including a needle tip, the inner needle being detachably disposed inside of the catheter; a needle hub to which the inner needle is fixed; a catheter operation member configured to move the catheter relative to the inner needle; and a support member disposed at the needle hub. The support member includes a support main body portion that is movable between (i) a first position located on a side of the catheter opposite the catheter operation member, at which the catheter is interposed between the support member and the catheter operation member, and the support main body portion contacts and supports the catheter, and (ii) a second position that is a different position from the first position, at which the support main body portion does not contact the catheter.

Abstract: An actuating member for making a flexible elongate member for medical use perform a predetermined action. The actuating member includes a push/pull member, an operating member, and a cam member. The push/pull member includes a first moving portion and a second moving portion, which are movable relative to each other. The push/pull member is pushed/pulled in conjunction with a movement of the first moving portion and the second moving portion. The operating member is rotatable about an axis in a direction intersecting an axial direction of the elongate member. The cam member moves the first moving portion and the second moving portion in conjunction with rotation of the operating member. The push/pull member makes the elongate member perform at least one of (i) an advance/retraction action and (ii) a bending action by transmitting the movement of the first moving portion and the second moving portion to the elongate member.

Abstract: A medical elongated body is disclosed, which can improve the operability by suppressing anisotropy of torque transmission performance in accordance with the rotational direction while maintaining flexibility. The medical elongated body has a proximal shaft, which extends in an axial center direction and includes at least a part of which a spiral slit is formed. The proximal shaft includes a site in which the spiral inclination angles, which are angles in an extending direction of a spiral of the slit with respect to a cross-section orthogonal to the axial center direction, are different from each other, and a stepped portion in which the angle of the slit changes locally with respect to the spiral inclination angle is formed on one opposed surface constituting the slit, and an abutting portion on which the stepped portion abuts when the proximal shaft is twisted.