A medical device is provided including a base member and a coating layer containing an antithrombogenic material and covering a surface of the base member. The antithrombogenic material contains a copolymer having a repeating unit (A) represented by the following formula (1): ##STR00001##
wherein R.sup.11 is a hydrogen atom or a methyl group, Z is an oxygen atom or NH, R.sup.12 is a C.sub.1-6 alkylene group, R.sup.13 and R.sup.14 are each independently a C.sub.1-4 alkyl group, and R.sup.15 is a C.sub.1-2 alkylene group, and a repeating unit (B) represented by the following formula (2): ##STR00002##
wherein R.sup.21 is a hydrogen atom or a methyl group, R.sup.22 is a C.sub.1-6 alkylene group, and R.sup.23 is a C.sub.1-4 alkyl group. The repeating unit (A) is contained in a proportion of 1 to 7 mol % based on all the structural units of the copolymer.

A medical device is provided including a base member and a coating layer containing an antithrombogenic material and covering a surface of the base member. The antithrombogenic material contains a copolymer having a repeating unit (A) represented by the following formula (1): ##STR00001##
wherein R.sup.11 is a hydrogen atom or a methyl group, Z is an oxygen atom or NH, R.sup.12 is a C.sub.1-6 alkylene group, R.sup.13 and R.sup.14 are each independently a C.sub.1-4 alkyl group, and R.sup.15 is a C.sub.1-2 alkylene group, and a repeating unit (B) represented by the following formula (2): ##STR00002##
wherein R.sup.21 is a hydrogen atom or a methyl group, R.sup.22 is a C.sub.1-6 alkylene group, and R.sup.23 is a C.sub.1-4 alkyl group. The repeating unit (A) is contained in a proportion of 1 to 7 mol % based on all the structural units of the copolymer.

Coatings, devices and methods are provided, wherein the contacting surface of a medical device with at least one contacting surface for contacting a bodily fluid or tissue, wherein long-lasting and durable bioactive agents or functional groups are deposited on the contacting surface through a unique two-step plasma coating process with deposition of a thin layer of plasma coating using a silicon-containing monomer in the first step and plasma surface modification using a mixture of nitrogen-containing molecules and oxygen-containing molecules in the second step. The two-step plasma coating process enables the implantable medical device to prevent both restenosis and thrombosis under clinical conditions. The invention also relates to surface treatment of metallic and polymeric biomaterials used for making of medical devices with significantly improved clinical performance and durability.

Disclosed are an implantable medical device, a preparation method thereof and an implantable medical device preform for the preparation of the implantable medical device. The implantable medical device comprises a metal basal body (21) and a polymer film layer (22) covering the surface of the metal basal body (21) and preventing endothelium growth and covering, and also comprises a transitional body (23), which is located between the metal basal body (21) and the polymer film layer (22) and covers at least part of the surface of the metal basal body (21), wherein the transitional body (23) is connected to the polymer film layer (22) and the metal basal body (21). By arranging the transitional body (23) to be connected to the polymer film layer (22) and the metal basal body (21), the polymer film layer (22) will not easily fall off when being implanted into a human body.

A multi-layer tubular woven construct is useful as a hose that transports a fluid or a powder or protects linear bodies such as wires, cables and conduits, as a tubular filter, or as a base material of a vascular prosthesis. In particular, a tubular woven construct in a tubular configuration woven by interlacing warp and weft yarns contains at least in part an elastic fiber yarn having a filament fineness of 1.0 dtex or more, the weft yarn containing at least in part a microfiber yarn having a filament fineness of less than 1.0 dtex.

A sheath introducer facilitates the insertion of a catheter into a peripheral artery. The sheath introducer comprises longitudinally extending exterior and interior surfaces, the interior surface defining a lumen in which blood flow occurs. The sheath introducer exterior surface has a hydrophilic material at least partially coated thereon and at least one biologically active agent disposed on the sheath introducer exterior surface. The at least one biologically active agent can be selected from the group consisting of an anticoagulant agent, an antiplatelet agent, an antiproliferative agent, an antibiotics agent, an anti-inflammatory agent, and an antivasospasmodic agent. In a preferred embodiment, the at least one biologically active agent comprises first, second and third biologically active agents, where the first biologically active agent is an antiproliferative agent, the second biologically active agent is an anticoagulant, and the third biologically active agent is an antivasospasmodic agent.

A sheath introducer facilitates the insertion of a catheter into a peripheral artery. The sheath introducer comprises longitudinally extending exterior and interior surfaces, the interior surface defining a lumen in which blood flow occurs. The sheath introducer exterior surface has a hydrophilic material at least partially coated thereon and at least one biologically active agent disposed on the sheath introducer exterior surface. The at least one biologically active agent can be selected from the group consisting of an anticoagulant agent, an antiplatelet agent, an antiproliferative agent, an antibiotics agent, an anti-inflammatory agent, and an antivasospasmodic agent. In a preferred embodiment, the at least one biologically active agent comprises first, second and third biologically active agents, where the first biologically active agent is an antiproliferative agent, the second biologically active agent is an anticoagulant, and the third biologically active agent is an antivasospasmodic agent.

The disclosure relates to a medical material including a copolymer having a repeating unit (A) represented by the following formula (1): ##STR00001## wherein R.sup.11 is a hydrogen atom or a methyl group, Z is an oxygen atom or NH, R.sup.12 is a C.sub.1-6 alkylene group, R.sup.13 and R.sup.14 are each independently a C.sub.1-4 alkyl group, and R.sup.15 is a C.sub.1-6 alkylene group, and a repeating unit (B) represented by the following formula (2): ##STR00002## wherein R.sup.21 is a hydrogen atom or a methyl group, R.sup.22 is a C.sub.1-6 alkylene group, and R.sup.23 is a C.sub.1-4 alkyl group. The repeating unit (A) is contained in a proportion of 0.6 to 7 mol % based on all the structural units of the copolymer. The disclosure makes it possible to provide a medical material and a medical device, which exhibit excellent antithrombogenicity even when used under severe conditions prone to thrombus formation.

An artificial blood vessel includes a tubular woven fabric composed of a multifilament yarn A including a first polyester and a multifilament yarn B including a second polyester, and has an inner diameter of 8 mm or less and a layer thickness of 50 ?m or more and 250 ?m or less, wherein the multifilament yarn A has a single fiber fineness of 1.0 dtex or more and a total fineness of 33 dtex or less, the multifilament yarn B has a single fiber fineness of 0.08 dtex or less and a total fineness of 66 dtex or less, and the multifilament yarn B forms loops on an inner wall surface of the tubular woven fabric.

An artificial blood vessel includes a tubular woven fabric composed of a multifilament yarn A including a first polyester and a multifilament yarn B including a second polyester, and has an inner diameter of 8 mm or less and a layer thickness of 50 ?m or more and 250 ?m or less, wherein the multifilament yarn A has a single fiber fineness of 1.0 dtex or more and a total fineness of 33 dtex or less, the multifilament yarn B has a single fiber fineness of 0.08 dtex or less and a total fineness of 66 dtex or less, and the multifilament yarn B forms loops on an inner wall surface of the tubular woven fabric.