Abstract: Disclosed is a biliary stent having a winding and fixing member around which a pulling string is wound, and the biliary stent includes a stent having a cylindrical body having space parts and bent ends formed on both ends thereof and configured such that the pulling string is woven with the space parts in zigzags into a circular band, a knot part is formed firmly so as not to be easily loosened, and a medical procedure is performed to expose the pulling string to an outside of a human body so as to prevent the cylindrical body from slipping inside a biliary tract; the winding and fixing member having a main body including an adhesive part so as to be adhered and fixed to a skin surface; and a cover gauze member configured to cover an entirety of the winding and fixing member and the skin surface.

Abstract: The present invention relates to a method of forming a PTFE film on a stent, a stent manufactured thereby, and more particularly to a method capable of forming a PTFE film on a stent regardless of the shape of the stent, preventing the PTFE film from being peeled off from the stent, and facilitating formation of the PTFE film on the stent, a stent manufactured through the method.

Abstract: A method of manufacturing a covered stent is disclosed. The method includes winding a first PTFE tape around a cylinder body of a jig, winding a second PTFE tape around a stent including the jig fitted therein, heating the stent in an oven, fitting the stent into upper and lower elastic members, fitting the elastic members into a mold, pressing the upper elastic member to bond the PTFE tapes to each other and to thus form a first film at a cylindrical body of the stent, taking the elastic members out of the mold, taking the stent out of the elastic members, removing the jig from the stent, forming a silicone coating layer at an expansion portion of the stent, and sewing the spaces in the expansion portion, the second PTFE tape, and the silicone coating layer to form a second film at the expansion portion.

Abstract: A stent having an improved anti-sliding function is proposed. The stent includes an inner stent and a pair of outer stents that have undergone heat treatment and have several spaces formed by weaving or crossing wires made of a superelastic shape memory alloy in a hollow cylindrical net shape, in which each of the outer stents is shorter than the inner stent and has an enlarged section having a diameter larger than the inner stent and a bending section formed by bending inward a side of the enlarged section; and the pair of outer stents are fitted on both ends of the inner stent such that the enlarged sections of the outer stents face each other, and spaces of the inner stent and spaces of the bending sections of the outer stents are connected by a connection thread, whereby a space section is defined between the inner stent and the outer stents.

Abstract: Proposed is a biliary stent unit having a pulling thread that is fixed to the skin of a human body to prevent a stent from separating from a diseased part of the biliary tract, and having a soft tube that reduces stimulus in the human body after a surgery because it has flexibility.

Abstract: A stent is effective for anti-migration after operation of a lumen, and a first outer stent or a second outer stent is used to be integral to a cylindrical stent and an upper end part of each of the first outer stent or the second outer stent is connected to the cylindrical stent by sutures to have a space part between the cylindrical start, the first outer stent, and the second outer stent. The space part is provided such that the first outer stent or the second outer stent is freely moved or transformed by an external force, and a displacement part caused by the movement or a transformation part caused by the transformation further presses or moves into a lesion part or an inner surface of the lumen to be securely held thereon, whereby the stent is effectively prevented from deviating from the lesion part.

Abstract: A method of manufacturing a plastic stent according to an embodiment of the present invention includes a first process of cleaning a surface of the stent including a plastic material to perform pretreatment, a second process of plasma-treating the pretreated surface of the stent, and a third process of introducing a hydrophilic functional group to the plasma-pretreated surface of the stent.

Abstract: A medical stent for use in a procedure for connecting two adjacent tissues in a human organ to form a passageway therebetween or a procedure for draining or shunting away internal fluids such as bile, pus, or the like. To manufacture the stent, a hollow tubular mesh body having diamond-like cells is weaved using super-elastic shape memory wire strands, both axial ends of the mesh body are expanded and multi-folded to form washer-shaped ends, and the both washer-shaped ends are provided with respective reinforced supportive rims formed by narrowing the cells of the end portions of the mesh body such that the wire strands at each axial end of the mesh body are superimposed to improve radial supporting force. The stent can lock in place when staying implanted in a human body.

Abstract: A stent insertion device for connecting human digestive organs includes a first handle being connected to one side of an outer tube, the first handle including a first inner passage communicating with the outer tube, a second handle being connected to a first side of an inner tube, the second handle including a second inner passage communicating with the inner tube, wherein a mounting space is provided between the outer tube and the inner tube at a second side of the inner tube, a stent for connecting human digestive organs being compressed and mounted to the mounting space, a third handle being connected to a first side of an insulation tube, the third handle including a third inner passage communicating with the insulation tube, and a needle knife being connected to a second side of the insulation tube.

Abstract: A stent having an improved anti-sliding function is proposed. The stent includes inner and outer stents that have undergone heat treatment and have several spaces formed by weaving or crossing wires made of a superelastic shape memory alloy in a hollow cylindrical net shape, in which the outer stent is shorter than the inner stent and has an enlarged section having a diameter larger than the inner stent and a bending section formed by bending inward a side of the enlarged section; and a pair of outer stents are fitted on both ends of the inner stent such that a pair of enlarged section face each other, and spaces of the inner stent and spaces of the bending sections are connected by a connection thread, whereby a space section is defined between the inner stent and the outer stent.

Abstract: A medical stent for use in a procedure for connecting two adjacent tissues in a human organ to form a passageway therebetween or a procedure for draining or shunting away internal fluids such as bile, pus, or the like. To manufacture the stent, a hollow tubular mesh body having diamond-like cells is weaved using super-elastic shape memory wire strands, both axial ends of the mesh body are expanded and multi-folded to form washer-shaped ends, and the both washer-shaped ends are provided with respective reinforced supportive rims formed by narrowing the cells of the end portions of the mesh body such that the wire strands at each axial end of the mesh body are superimposed to improve radial supporting force. The stent can lock in place when staying implanted in a human body.

Abstract: A stent is effective for anti-migration after operation of a lumen, and a first outer stent or a second outer stent is used to be integral to a cylindrical stent and an upper end part of each of the first outer stent or the second outer stent is connected to the cylindrical stent by sutures to have a space part between the cylindrical start, the first outer stent, and the second outer stent. The space part is provided such that the first outer stent or the second outer stent is freely moved or transformed by an external force, and a displacement part caused by the movement or a transformation part caused by the transformation further presses or moves into a lesion part or an inner surface of the lumen to be securely held thereon, whereby the stent is effectively prevented from deviating from the lesion part.

Abstract: A stent insertion device for connecting human digestive organs includes a first handle being connected to one side of an outer tube, the first handle including a first inner passage communicating with the outer tube, a second handle being connected to a first side of an inner tube, the second handle including a second inner passage communicating with the inner tube, wherein a mounting space is provided between the outer tube and the inner tube at a second side of the inner tube, a stent for connecting human digestive organs being compressed and mounted to the mounting space, a third handle being connected to a first side of an insulation tube, the third handle including a third inner passage communicating with the insulation tube, and a needle knife being connected to a second side of the insulation tube.

Abstract: Disclosed is a covered stent having bending characteristics, capable of maintaining a bent state and preventing a lesion from invading into the covered stent by solving the problem of a conventional stent having bending characteristics. The present invention provides a stent, wherein pieces of PTFE tape made of the same material can be prevented from being separated from each other to be maintained only through partial adhesion on the inside and outside of a cylindrical stent, invasion of the lesion can be prevented since the state where an entire outer surface of the stent is wrapped with the PTFE tape can be maintained, and the bent state of the cylindrical stent can be freely maintained since the PTFE tape located on the outside and the cylindrical stent can maintain a free state with each other by allowing no PTFE tape at a part of the inside of the cylindrical stent.

Abstract: A partially biodegradable stent includes a main net body of hollow cylindrical shape formed of elastically deformable wires interlaced with each other, the net body extending in a longitudinal direction and terminating at open opposite ends, and an auxiliary net portion provided at one of the open opposite ends of the main net body, the auxiliary net portion formed of a biodegradable wire which can be degraded and removed by a bodily fluid. The auxiliary net portion is formed by interlacing the biodegradable wire into a cylindrical shape independently of the main net body or by interlacing the biodegradable wire with the elastically deformable wires at one of the open opposite ends of the main net body.

Abstract: A stent system includes a stent and a drawstring for removal of the stent. The drawstring includes an end string, a longitudinal string and a circumferential string. The end string is formed in an end of the stent body in an annular shape in such a way that the end string passes, in a zigzag manner, through mesh arranged in a circumferential direction of the stent body. A hook loop is formed by tying opposite ends of the end string to each other. The longitudinal string extends at a first end thereof from the end string in the longitudinal direction of the stent body. The circumferential string extends from a second end of the longitudinal string and is formed in an annular shape in such a way that the circumferential string passes, in a zigzag manner, through mesh arranged in the circumferential direction of the stent body.

Abstract: Disclosed herein is a stent implanted in the body of a patient. The stent includes a hollow cylindrical stent body which is made of a super-elastic shape memory alloy and has an expanded diameter part on one end thereof, and a support stent which has an elastic spherical structure and is fitted over the cylindrical stent body behind the expanded diameter part. The stent is implanted in the body such that food that has passed through the stomach is prevented from mixing with bile or pancreatic juice in the duodenum and moves directly into the small intestine to prevent the duodenum from absorbing nutrients of the food while the small intestine directly digests the food and absorbs the nutrients, thus minimizing a nutrient absorption rate, thereby preventing the obesity of the patient.

Abstract: Disclosed herein are a plastic stent and a stent operation apparatus for plastic stents. The plastic stent includes a stent body with a flow hole formed through the stent body in the longitudinal direction thereof. The stent operation apparatus includes a stent push rod having an externally threaded end. The stent body has an internal thread on the circumferential inner surface of the flow hole so that the internal thread engages with the externally threaded end of the stent push rod of the stent operation apparatus. The plastic stent is coupled to the stent push rod by the threaded engagement between the externally threaded end and the internal thread, is inserted into the body of a patient, is adjusted in location by pushing or pulling the stent push rod, and is released from the stent push rod at a correct location in the body of the patient by disengaging the threaded engagement.

Abstract: Disclosed herein is a drawstring for removal of a stent. The drawstring includes an end string, a longitudinal string and a circumferential string. The end string is formed in an end of the stent body in an annular shape in such a way that the end string passes, in a zigzag manner, through mesh arranged in a circumferential direction of the stent body. A hook loop is formed by tying opposite ends of the end string to each other. The longitudinal string extends at a first end thereof from the end string in the longitudinal direction of the stent body. The circumferential string extends from a second end of the longitudinal string and is formed in an annular shape in such a way that the circumferential string passes, in a zigzag manner, through mesh arranged in the circumferential direction of the stent body.

Abstract: A wavily deformable stent includes a hollow cylindrical net body formed of elastically deformable wires interlaced with each other. The net body extends in a longitudinal direction and terminates at open opposite ends. The net body has at least one high-rigidity section and at least one low-rigidity section less rigid than the high-rigidity section. The high-rigidity section and the low-rigidity section are arranged continuously and alternately along the longitudinal direction. The stent is wavily deformed and held in place against unwanted displacement when situated inside a stenosed part of a bodily organ. Also provided is a method for producing the wavily deformable stent.