Terumo Kabushiki Kaisha

Noboru Saito

Kazuhiro Maruyama

Hiroki Goto

Ryohei Takeuchi

Tomoya Komatsu

Kunio Horiuchi

Takeshi Udagawa

Sayaka Uchiyama

A balloon catheter and a stent delivery system are disclosed, which includes a shaft portion of which an axially orthogonal cross section of an outer peripheral surface has a polygonal shape, and a balloon which is foldable on the outer peripheral surface of the shaft portion and in which turned-back portions are formed when folded. Portions formed to linearly extend along an axial direction in the turned-back portions are respectively positioned on sides of the polygonal shape. A stent can be arranged on an outer periphery of a balloon in the balloon catheter and expands in response to dilation of the balloon.

Balloon catheter and stent delivery system

A stent able to minimize occurrences of strain and stress concentration in a drug coat layer upon expansive deformation of the stent in a radial direction to avoid the possibility of the drug separating from the stent, includes a stent body and a drug coating layer coated on the outside surface of the stent body so that the thickness of the drug coating layer gradually decreases toward a bent portion of the stent.

Stent with drug coat layer

Stent with drug coat layer including a gradual stepwise decrease portion

A stent includes a stent body in which struts are joined mutually while intersecting and which is formed tubularly as a whole, and a drug coat layer on the outer surface of the struts. The strut has a bend which is deformed as the stent body expands/contracts in the radial direction, and the drug coat layer with which the bend is coated is formed in such a manner that the drug coat layer is mountain-shaped in a cross-section perpendicular to the axis of the strut and the ridgeline of the mountain shape extends in a wavy shape along the longitudinal direction of the strut. The drug coat layer deforms relatively easily without using plasticizer as the stent deforms and is not so susceptible to causing problems such as peeling, destruction, damage or falling off of the drug coat later.

Stent

A platelet collecting apparatuscomprises a centrifugal separatorpossessing a rotatable rotor; a first linefor allowing the flow of the blood entering the centrifugal separator; a second linefor allowing the flow of the blood emanating from the centrifugal separator, a plasma collecting bagconnected to the first lineand the second lineso as to collect the plasma emanating from the centrifugal separatorand return the collected plasma to the centrifugal separator, a platelet collecting bagconnected to the second lineso as to collect the platelets emanating from the centrifugal separator, a blood delivering pumpdisposed in the first line, and a controllerfor controlling the operation of the rotor of the centrifugal separatorand the operation of the blood delivering pump. The controlleris endowed with a function of varying the rotational frequency of the rotorduring the course of blood collection in conformity with the amount of the blood entered into the centrifugal separatorvia the first line

Growing community of inventors

Kanagawa, Japan

Noboru Saito