Abstract: A ventilation pipe sleeve system comprises a ventilation pipe sleeve, a first filter, and a cap attached to the ventilation pipe sleeve. The ventilation pipe sleeve includes a tubular body including an outer surface and an inner surface. The inner surface of the tubular body defines a conduit extending from a first end to a second end of the ventilation pipe sleeve. The first filter is liquid impermeable and is gas permeable, the first filter is fixed to the tubular body to form a watertight structure at a first end region of the tubular body. The cap covers the first filter and at least a portion of the outer surface of the tubular body.

Abstract: A stent delivery device for delivering a self-expanding stent comprises an inner sheath including a proximal end portion and a distal end portion, a stent stopper including a stopper main body that is circumferentially disposed over at least a portion of the inner sheath at the proximal end portion, and at least one projection extending radially outward from the stopper main body for releasably engaging a portion of the self-expanding stent, and an outer sheath slidably disposed over the inner sheath and the stent stopper. The at least one projection includes a distal end surface and a proximal end surface, and the proximal end surface includes a recess extending into a body of the projection toward the distal end surface.

Abstract: A dried tissue model includes a dried hydrogel which is a dried product of a hydrogel composition, in which when a solvent with which the dried hydrogel can be impregnated is used as a second solvent and the dried hydrogel is impregnated with the second solvent to form an impregnated hydrogel, the impregnated hydrogel satisfies at least one of the following: the impregnated hydrogel has a modulus of elasticity in shear of 0.9×102 to 2.1×102 kPa; the impregnated hydrogel has a viscosity of 4.8 to 17.6 kPa; and the ratio of a second Young's modulus at a strain of 0.5 of the impregnated hydrogel to a first Young's modulus at a strain of 0.5 of the hydrogel composition is 0.39 to 0.69.