Abstract: The present disclosure relates to a stent delivery system, and can be configured to include a connector portion connected to an external current source, an electrocautery tip connected to the connector portion by a conductive line, and a delivery portion having one side connected to the electrocautery tip, having the other side connected to the connector portion, and having the conductive line for connecting the electrocautery tip and the connector portion positioned therein, and a stent space portion in which a stent is positioned is formed adjacent to the electrocautery tip inside the delivery portion, and the delivery portion gradually moves and supplies the stent into the human body tissue, and according to the present disclosure, it is possible to integrate the conductive line and the tube, thereby improving the rigidity of the tube, and varying the size of the electrocautery tip.

Abstract: The present disclosure relates to a stent delivery system. According to the present disclosure, it is possible to minimize the current flow distance in the in-body by integrally conducting two poles to the electrocautery tip, thus enhancing the treatment stability.

Abstract: The present invention relates to a stent that uses a shape memory alloy wire, the stent being an expansion device installed on a part of a body lumen, which is constricted, or which has been constricted, so as to widen the passage of the lumen in response to the lesion part. The purpose of the present invention is to provide a method for manufacturing a stent using a shape memory alloy wire such that the stent maintains a high degree of conformability in a bent portion of a body lumen in which the same is inserted while substantially improving rigidness and durability against continuously applied fatigue, a stent manufactured thereby, and a jig for manufacturing the same.

Abstract: A bipolar electrode for radio frequency ablation, the electrode including: a cylindrical body provided with first and second coupling grooves formed on an outer circumferential surface of the cylindrical body in a screw thread shape and spaced apart from each other at a predetermined interval; an active electrode body wound on the first coupling groove of the cylindrical body a plurality of times to be inserted thereinto, and connected to a first terminal of a radiofrequency generator; and a passive electrode body wound on the second coupling groove of the cylindrical body a plurality of times to be inserted thereinto, and connected to a second terminal of the radiofrequency generator. Thus, the electrode has effects of efficiently being moved to a vascular lesion such as varicose veins, and reducing a risk of thermal damage to surrounding tissue outside the lesion during treatment.

Abstract: An apparatus for a transluminal procedure includes: a case composed of a front case part formed in the shape of a pipe and having a locking groove at a rear end, a central case part combined with the front case part and having a button hole at a rear end, and a rear case part combined with the central case part and having a through-hole formed ahead of a button groove coming in contact with the button hole at a center; a locking member having a button and a locking end; an operation member formed in the shape of a pipe and moving up and down in the case; an inner wire in live operation member and locked to the case; and an outer tube fitted on the inner wire and fixed ahead of the operation member.

Abstract: A prosthetic heart valve using a pericardium is disclosed where: three hetero-biological tissue slices, which are extracted in a quadrangular shape from a bovine pericardium or a porcine pericardium, are prepared; each hetero-biological tissue slice is folded so as to form an inner tissue slice inside and an outer tissue slice outside, the outer tissue slice being longer than the inner tissue slice; each of the inner tissue slice and outer tissue slice is coupled by sewing in a semicircular shape with a first coupling thread such that each inner tissue slice forms a pulmonic valve slice inside the first coupling thread and a fixing slice outside the first coupling thread such that each hetero-biological tissue slice is formed in a cylindrical shape by allowing each slice to be adjacent to each other. The disclosed prosthetic heart valve has increased durability and prevents reverse blood flow.

Abstract: The present invention relates to a device and a method for detecting a position of an electrode inserted into a human body that predict a path through a position sensor in a handle part before the electrode is inserted into the human body and display the path. The device for detecting the position of an electrode inserted into a human body according to the present invention includes: a position signal generator generating a position signal; an electrode needle having an electrode-side position sensor that is provided in an interior of a lance needle thereof and receives the position signal to generate first position information; and a handle connected to the electrode needle and having a handle-side position sensor that is included therein and receives the position signal to generate second position information.

Abstract: There are provided a system for ablation utilizing multiple electrodes and a method for controlling the system. The system includes: a main amplification unit providing main radio frequency (RF) power by amplifying received power; a sub-amplification unit providing sub-RF power by amplifying received power; a first switching unit transmitting the main RF power provided by the main amplification unit to one of first to third electrodes; a second switching unit transmitting the sub-RF power provided by the sub-amplification unit to one of the first to third electrodes; and a control unit controlling the first and second switching units to apply the main RF power and the sub-RF power to a pair of respective electrodes previously selected from the first to third electrodes.

Abstract: Disclosed herein is a stent for connecting adjacent tissues of the organs of a patient. The stent includes a hollow cylindrical body which is formed by weaving a superelastic shape-memory alloy wire in an overlapping manner such that rhombic openings are formed, and wing parts which are provided by expanding respective opposite ends of the hollow cylindrical body outwards and turning the opposite ends inside out on bent portions. The wing parts face each other so that the wing parts are tensed in a longitudinal direction of the cylindrical body. Thereby, the wing parts can elastically move inwards or outwards with respect to the longitudinal direction to automatically adjust a distance between the wing parts in response to the distance between the adjacent tissues of the organs or thicknesses of walls of the organs, so that the wing parts are put into close contact with the adjacent tissues.

Abstract: The present invention relates to an electrode device for radiofrequency ablation, which can easily be used for computed tomography (CT)-guided radiofrequency ablation (RFA) treatment. An embodiment of the present invention provides an electrode device for radiofrequency ablation, which comprises an electrode needle provided in front of a grip and is configured to cauterize and necrotize a diseased site by radiofrequency heat generated from the electrode needle, the electrode device comprising a bendable tube which is provided between the grip and the electrode needle, is bendable at a predetermined angle, and is capable of being maintained in a bent state.

Abstract: An apparatus for a transluminal procedure includes: a case composed of a front case part formed in the shape of a pipe and having a locking groove at a rear end a central case part combined with the front case part and having a button hole at a rear end, and a rear case part combined with the central case part and having a through-hole formed ahead of a button groove coming in contact with the button hole at a center; a locking member having a button and a locking end; an operation member formed in the shape of a pipe and moving up and down in the case; an inner wire in live operation member and locked to the case; and an outer tube fitted on the inner wire and fixed ahead of the operation member.

Abstract: A monorail guides a guide wire introduced into an outer tube in a catheter for stent surgery. The catheter includes the outer tube having an outer hole, an inner tube installed in the outer tube, and a guide wire inserted into the outer hole and the inner tube and protruding outwards from a front end of the inner tube so that the outer tube and the inner tube move along the guide wire so as to be guide a stent. The monorail includes a separation guide which is inserted into and fixed in the outer tube and configured such that the guide wire that is inserted into the outer hole is spaced apart from the inner tube without making contact with the inner tube.

Abstract: A biodegradable double stent is used for various organs such as a biliary tract, an esophagus, an airway and a ureter. A biodegradable stent having a hollow cylindrical body woven out of a separate wire made of biodegradable polymer so as to have a plurality of rhombic spaces is fixed to an intermediate portion of a primary stent having a cylindrical body. When administered into the organ, the biodegradable stent has its original function of expanding the organ, and is firmly supported in the inner wall of a narrowed passage of the organ by pressurizing the inner wall of the narrowed passage of the organ. After a predetermined time period has elapsed, the biodegradable stent is gradually degraded away by bodily fluids, thereby enabling the primary stent to be easily removed from the organ.

Abstract: Provided is a method for manufacturing a stent having a superior bending characteristic, in which a basic jig is employed to weave wires by alternating an obtuse angle and an acute angle so as to repetitively form starry cells in left and right portions and upper and lower portions of the stent, and in which the wires intersecting each other in the starry cells are allowed to freely move to provide the superior bending characteristic caused by flexibility in both the diametrical direction and lengthwise direction thereof, and the stent manufactured thereby. Thus, the stent can have a flexible bending characteristic and is prevented from being folded even when sharply bent after being coated.

Abstract: An anti-migration stent includes a hollow stent body formed by interweaving a superelastic shape memory alloy wire diagonally such that upper and lower wires alternately cross over and under each other, forming multiple diamond-shaped spaces. After placing and holding a rod underneath the wire of the hollow stent body, and heating the stent body, an anti-migration bent part is formed on the wire, protruding vertically to form an outline corresponding to a cross-sectional shape of the rod, which makes stent production easy. The stent is prevented from migrating in a lumen of a human body by the bent part protruding vertically and diagonally from the stent body, and easy to insert into and remove from the lumen, preventing the conventional problem damaging an inner surface of the lumen.

Abstract: Provided is a catheter operating structure in which a medical device such as a stent is rotated to move forward or backward without being repeatedly pushed or pulled when inserted into the lumen of a human body, so that a surgical position can be precisely adjusted by the forward or backward movement. A rotary member includes a spiral shaft formed on a handle so as to be inserted into a tubular body. A movable member includes a female spiral end that is formed at one end thereof and is spirally coupled with the spiral shaft. An injection member moving member moves together with the movable member. When the spiral shaft is rotated by rotation of the handle with the spiral shaft spirally coupled to the female spiral end, the movable member moves forward or backward without being rotated due to the injection member moving member.

Abstract: There are provided a system for ablation utilizing multiple electrodes and a method for controlling the system. The system includes: a main amplification unit providing main radio frequency (RF) power by amplifying received power; a sub-amplification unit providing sub-RF power by amplifying received power; a first switching unit transmitting the main RF power provided by the main amplification unit to one of first to third electrodes; a second switching unit transmitting the sub-RF power provided by the sub-amplification unit to one of the first to third electrodes; and a control unit controlling the first and second switching units to apply the main RF power and the sub-RF power to a pair of respective electrodes previously selected from the first to third electrodes.

Abstract: The present invention relates to a bipolar electrode, and more particularly, to an electrode for high-frequency heat treatment capable of cauterizing and necrotizing lesions by heating the lesions, such as a cancer tissue of a body organ, with a high frequency, in particular, an overlapping bipolar electrode for high-frequency heat treatment capable of cauterizing lesions of tubular organs, such as a blood vessel, with a minimum invasion.

Abstract: Provided a medical snare in which the expansion direction of a loop is easily rotated in an arbitrary direction in which a removable target has grown, the removable target is easily inserted into the loop so as to allow a surgical procedure to be easily performed to reduce a time required for the surgical procedure and burdens of a patient and a surgeon, and the free rotation of a wheel is prevented to be able to fix the expansion direction of the loop. Accordingly, only the wheel can be easily rotated to switch the expansion direction of the loop without rotating the entire medical snare.

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.