Abstract: The range of operating angles of a position transducer is widened, and its signal-to-noise ratio is improved. The position transducer includes a light source and a detector including at least one pair of photodiodes (PDs) disposed on a predetermined circle. The detector receives light emitted from the light source to output a signal varying depending on the areas of regions where the light is received on two PDs forming a pair. The PDs are formed on separate chips, respectively, and the chips are disposed on a substrate so that one or more pairs of PDs surround the entirety of a predetermined region and have an annular shape as a whole.

Abstract: The range of operating angles of a position transducer is widened, and its signal-to-noise ratio is improved. The position transducer includes a light source and a detector including at least one pair of photodiodes (PDs) disposed on a predetermined circle. The detector receives light emitted from the light source to output a signal varying depending on the areas of regions where the light is received on two PDs forming a pair. The PDs are formed on separate chips, respectively, and the chips are disposed on a substrate so that one or more pairs of PDs surround the entirety of a predetermined region and have an annular shape as a whole.

Abstract: A syringe assembly includes a barrel having a barrel tip portion, a puncture needle projecting from the barrel tip portion, and a cap that is detachably mountable to the barrel so as to seal a distal end of a needle hole. The cap has a receiving hole that receives the puncture needle, a bottom wall portion into which the puncture needle is inserted, and a stopper portion that defines an insertion length of the puncture needle relative to the bottom wall portion. In a state in which the cap is mounted to the barrel, the length from the most proximal position of a contact region between the cap and the puncture needle to the most proximal position of an edge surface is 1 to 3 mm.

Abstract: A connector includes: a port in which a disc configured to be displaceable is provided; a space defined by a side wall surrounding the disc in the circumferential direction when the disc is displaced and a bottom wall arranged at a position opposite the disc and configured to allow displacement of the disc; and a flow passage connected to the bottom wall at a position away from the side wall, and allowing fluid to flow therethrough to the space. The connector further includes cutouts formed from the flow passage to the side wall.

Abstract: A syringe assembly includes a barrel having a barrel tip portion, a puncture needle projecting from the barrel tip portion, and a cap that is detachably mountable to the barrel so as to seal a distal end of a needle hole. The cap has a receiving hole that receives the puncture needle, a bottom wall portion into which the puncture needle is inserted, and a stopper portion that defines an insertion length of the puncture needle relative to the bottom wall portion. In a state in which the cap is mounted to the barrel, the length from the most proximal position of a contact region between the cap and the puncture needle to the most proximal position of an edge surface is 1 to 3 mm.

Abstract: The present invention provides an in-vivo intravascular blood replacing liquid which eliminates the need for the use of a contrast agent, is subjected to a low injection resistance, and has blood immunity to a sufficient degree and continuity to some extent. An in-vivo intravascular blood replacing liquid of the present invention is injected into a blood vessel to replace blood at an in-vivo intravascular portion to be inspected therewith in making an in-vivo intravascular inspection. The blood replacing liquid contains cationic and anionic compounds, added to an aqueous medium unharmful for the living body, which are unharmful for the living body. The blood replacing liquid also contains an ion complex formed of the cationic and anionic compounds.

Abstract: A connector includes: a port in which a disc configured to be displaceable is provided; a space defined by a side wall surrounding the disc in the circumferential direction when the disc is displaced and a bottom wall arranged at a position opposite the disc and configured to allow displacement of the disc; and a flow passage connected to the bottom wall at a position away from the side wall, and allowing fluid to flow therethrough to the space. The connector further includes cutouts formed from the flow passage to the side wall.