Anti-migration stent

An anti-migration stent having a first stent (100) configured to expand a lesion area (1a) narrowed and blocked in a lumen (1) of a body and to have a first cylindrical body (110) formed in a hollow cylindrical shape by weaving or crossing wires (2) made of a super elastic shape memory alloy in a mesh shape so that multiple first space parts (111) are formed between the wires (2), a first film part (120) made of polytetrafluoroethylene (PTFE) formed on an entire inner surface of the first cylindrical body (110), and a second film part (130) made of polytetrafluoroethylene (PTFE) formed on an outer surface of the first cylindrical body (110), with the second film part (130) formed in a spiral shape to have predetermined intervals defined therein and bonded to the first film part (120), the anti-migration stent comprising:

• a second stent (200) having multiple second space parts (211) formed by weaving or crossing the wires (2) made of a super elastic shape memory alloy in a mesh shape, with the second stent (200) being shorter in length than the first stent (100) and fitted over and connected to one side of the first stent (100) from the outside so that the second stent (200) is held in the lumen (1) in which the lesion area (1a) has occurred,
• wherein the second stent (200) is composed of a second cylindrical body (210) formed in a hollow cylindrical shape, a connection part (220) formed to be inclined at one side of the second cylindrical body (210) so as to be connected to the first stent (100), and a bent portion (230) formed at an angle between the second cylindrical body (210) and the connection part (220), with the second cylindrical body (210), the connection part (220), and the bent portion (230) having a third film part (240) made of silicone formed thereon.

An anti-migration stent having

• An anti-migration stent having a first stent (100) configured to expand a lesion area (1a) narrowed or blocked in a lumen (1) of a body and to have a first cylindrical body (110) formed in a hollow cylindrical shape by weaving or crossing wires (2) made of a super elastic shape memory alloy in a mesh shape so that multiple first space parts (111) are formed between the wires (2), a first film part (120) made of polytetrafluoroethylene (PTFE) formed on an inner surface of the first cylindrical body (110), with the first film part (120) formed in a spiral shape to have predetermined intervals defined therein, and a second film part (130) made of polytetrafluoroethylene (PTFE) formed on an outer surface of the first cylindrical body (110), with the second film part (130) being formed in the same spiral shape as the shape of the first film part (120) so as to have predetermined intervals defined therein and being bonded to the first film part (120), the anti-migration stent comprising:
• a second stent (200) having multiple second space parts (211) formed by weaving or crossing the wires (2) made of a super elastic shape memory alloy in a mesh shape, with the second stent (200) being shorter in length than the first stent (100) and fitted over and connected to one side of the first stent (100) from the outside so that the second stent (200) is held in the lumen (1) in which the lesion area (1a) has occurred,
• wherein the second stent (200) is composed of a second cylindrical body (210) formed in a hollow cylindrical shape, a connection part (220) formed to be inclined at one side of the second cylindrical body (210) so as to be connected to the first stent (100), and a bent portion (230) formed at an angle between the second cylindrical body (210) and the connection part (220), with the second cylindrical body (210), the connection part (220), and the bent portion (230) having a third film part (240) made of silicone formed thereon.