66 results about "Dormia basket" patented technology

The invention discloses a folding type clamping device, relates to the technical field of medical instruments, and is suitable for working channels of superfine endoscopes such as a breast duct endoscope. The clamping device comprises a clamping assembly, a transmission assembly, a limiting assembly and an operation assembly. The clamping assembly comprises a metal pipe body and an integrally-formed retractable net basket structure, the transmission assembly is a traction steel wire with the front end connected with the net basket structure, the limiting assembly limits the stroke of the traction steel wire through a bridge type metal pipe and a movable pin, and the operation assembly drives the traction steel wire to move. The mesh basket structure is in a closed state without external force and can be inserted into an endoscope channel; after the tissue leaves the channel, the operation assembly drives the traction steel wire to control the net basket to open and close to clamp the tissue in combination with visual observation. The device is made of medical stainless steel, is a disposable sterilized product and can be used after being disassembled. The device breaks through the sampling bottleneck of a superfine endoscope, sampling is stable and safe, early diagnosis of breast diseases is assisted, and the clinical value of the endoscope is improved.

The invention provides a guide wire calculus removing mesh basket and application thereof. The guide wire calculus removing net basket comprises a net basket body, a guide wire, a net basket cap, an outer sheath tube and a handle, the tail end of the guide wire is connected with the head end of the net basket cap, the net basket cap is arranged outside the head end of the outer sheath tube, the net basket body is inserted into the outer sheath tube through the tail end of the outer sheath tube, one end of the net basket body is connected with the tail end of the net basket cap, and the other end of the net basket body is connected with the handle. The handle is located outside the tail end of the outer sheath tube. The device can be inserted through various instrument channels such as a nipple incision knife, SpyGlass or a pancreatic and biliary duct imaging system forceps channel, and multi-scene calculus removal treatment is achieved; in the process of releasing the mesh basket, the head end of the soft guide wire crosses the calculus and enters the bile duct at the far end more easily, release of the mesh basket is facilitated, and the calculus can be extracted by pulling back the mesh basket.

The invention discloses a lithotomy and lithotripsy handle and a lithotomy and lithotripsy integrated medical instrument, and belongs to the technical field of medical instruments, the lithotomy and lithotripsy handle comprises an operation part and a guide sheath tube capable of collecting a mesh basket, the guide sheath tube is installed on the operation part, the operation part is provided with an operation device, and the operation device at least has a lithotomy mode and a lithotripsy mode; the lithotomy and lithotripsy integrated medical instrument comprises a mesh basket and a lithotomy and lithotripsy handle. In the calculus removing mode, the operation device can convert external force applied by an operator into driving force for driving the mesh basket to move in the axial direction of the guiding sheath tube, and the mesh basket is driven to be released or recycled through the guiding sheath tube so that calculus removing can be achieved. In the lithotripsy mode, the operation device can convert external force applied by an operator into lithotripsy force for driving the mesh basket to be collected to the guiding sheath tube in the axial direction, so that the mesh basket collects the lithotripsy under the constraining force of the guiding sheath tube. The lithotripter has the advantages that lithotripsy can be carried out during lithotripsy in the bile duct and during lithotripsy, a lithotripsy handle does not need to be externally connected independently, economic cost is low, operation is easy, and the risk of cross infection is avoided.

The application relates to the technical field of basket catheter, in particular to a basket catheter system and a basket catheter calibration method. The basket catheter system comprises a basket catheter, an operating handle, a tube body and a basket electrode assembly, the basket electrode assembly comprises a spline, a proximal end fixing seat and a distal end fixing seat, and the basket catheter system further comprises a proximal end position sensor and a distal end position sensor arranged on the proximal end fixing seat and the distal end fixing seat respectively; the basket catheter system further comprises a processing device, the proximal end position sensor and the distal end position sensor are connected with the basket catheter, and the processing device is used for obtaining a contact force of the basket electrode assembly and target tissue according to a proximal-distal end spacing change amount, a corresponding relationship between a known axial force value of the basket electrode assembly and the proximal-distal end spacing change amount and a contact angle of the basket electrode assembly and the target tissue. The application mainly solves the technical problem of how to detect the contact force of the basket catheter and the target tissue.

This application provides a basket catheter, which includes flexible circuit strips, an elastic support, basket electrodes, and a core rod. The flexible circuit strips are respectively arranged on the inner and outer surfaces of the elastic support, and multiple basket electrodes are disposed on the flexible circuit strips. The basket electrodes can be switched between a contracted state and an expanded state by operating the core rod. The basket electrodes on the inner surface of the elastic support are configured not to contact tissue. Accurate localization of key conduction areas through high-density sampling within the cardiac chambers allows for a clearer elucidation of the arrhythmia matrix, thereby providing better mapping and / or ablation results.

The present invention relates to the technical field of medical instruments. Disclosed are a ball head locking mechanism of a basket catheter and a basket catheter. The ball head locking mechanism comprises a ball head screw, a ball head thread insert and a restraining ring, wherein the ball head screw is threadedly connected to the inner side of the ball head thread insert, and the outer wall of the ball head thread insert is of a slope structure. In the present invention, the ball head screw and the ball head thread insert which are in threaded fit are screwed together, and end portions of nickel-titanium sheets of a basket structure are effectively pressed against the slope structure by means of the restraining ring, thereby achieving effective locking and avoiding the use of glue bonding to reduce the risk of detachment. In addition, the ball head thread insert can further be in the form of a combination of an expansion ring and a compression thread insert. When the ball head screw and the compression thread insert are rotated relative to each other and tightened, the ball screw and the compression thread insert can also jointly compress the expansion ring, so that the expansion ring expands outwards to press against the nickel-titanium sheets, thereby further assisting in locking the nickel-titanium sheets, and ensuring the locking effect.

The invention belongs to the field of medical instruments, and provides a gastroendoscopic gastric calculus crushing device which comprises a control assembly, the control assembly comprises a shell and a handle, and the handle is fixedly mounted on the right side surface of the shell; the adjusting assembly is mounted on the surface of the bottom side of the shell; the stretching-in mechanism is installed on the surface of the bottom side of the shell, and the stretching-in mechanism is used for stretching into the stomach of a patient; the crushing assembly is mounted in the bottom end of the stretching mechanism, and the crushing assembly is used for crushing the gastric calculi; under the action of a vibration motor, the vibration motor acts on a tool apron to move, the tool apron drives a smashing cutter to conduct smashing, a steel wire rope drives a net basket to move, the net basket conveniently drives broken stones to move, continuous material supplementing is facilitated, the stone smashing efficiency is improved, the stone smashing effect is met, and after the attached broken stones are squeezed away through a cleaning plate, it is guaranteed that the surface of the smashing cutter is clean; the crushing cutter is convenient to operate and use.

The invention relates to the technical field of medical instruments, in particular to a variable-diameter spiral choledochoscope calculus removal mesh basket which comprises a base body and a handle arranged at the rear end of the base body, a telescopic pin pipe is arranged at the front end of the base body, a regulation and control guide wire is connected to the handle and penetrates through the base body and the telescopic pin pipe, and the telescopic pin pipe is connected to the handle. The near end of the spiral mesh basket body is fixedly connected to the end of the regulation and control guide wire, a front end cap is arranged at the far end of the spiral mesh basket body, and when the calculus removing mesh basket is used, the regulation and control guide wire is driven by the push-pull assembly to slide back and forth relative to the telescopic pin pipe, so that the spiral mesh basket body can contract in the telescopic pin pipe, that is, the spiral mesh basket body becomes small in the radial direction; or the telescopic pin pipe is pushed out to expand outwards, namely, the telescopic pin pipe is enlarged in the radial direction, stepless continuous adjustment of the diameter of the mesh basket is achieved, meanwhile, the adjusting and controlling guide wire and the spiral mesh basket body fixed to the adjusting and controlling guide wire are driven by the rotating assembly to rotate synchronously, the spiral mesh basket body can spirally tighten or loosen around the axis of the spiral mesh basket body, and therefore the wrapping and locking effects on calculi are enhanced.

The embodiment of the invention relates to the technical field of medical auxiliary equipment, in particular to a novel drainage tube capturing device. A novel drainage tube capturing device comprises a net basket, a first catheter, a second catheter, a sliding block and a handle, the second catheter is sleeved with the first catheter, the first catheter is connected with the handle, the sliding block is arranged on the handle in a sliding mode, the sliding block is connected with the second catheter, and the sliding block pushes the second catheter to move relative to the first catheter. The net basket is arranged at the tail end of the second guide pipe. According to the drainage tube capturing device, the tube inserting distance can be reduced, the time of the drainage tube in the mouth-nose exchange process can be shortened, the exchange process of the drainage tube can be completed in the oral cavity, meanwhile, the capturing condition of the drainage tube can be observed through an endoscope, exchange of the drainage tube can be completed more rapidly, and the operation efficiency is improved. Therefore, pain brought to a patient during intubation and extubation is reduced.

The utility model relates to the technical field of medical instruments, in particular to a mesh basket part of a calculus removing mesh basket and a calculus removing mesh basket system.The mesh basket part comprises a connecting part, and the connecting part is connected with a traction part of the calculus removing mesh basket system so as to drive the mesh basket part of the calculus removing mesh basket to act; the main supporting arm is a main body part of the mesh basket part; one ends of the main supporting arms are connected with the connecting part, and the other ends of the main supporting arms are connected in a matched mode to form a net basket part.

Disclosed are systems and methods of removing heart valve therapy. The systems and methods may include chordae cutting devices having unique shape memory curvature, capture basket catheters with mesh baskets, and leaflet cutting tools with unique shapes that may be pulled through leaflet tissue.

The utility model provides a catheter device for subsection bronchial lavage, which comprises an inner catheter for lavage fluid injection and suction and a mesh basket mechanism for plugging and positioning, and the mesh basket mechanism is arranged on the outer side of the front end of the inner catheter; the mesh basket mechanism comprises a mesh basket body located on the inner side and a film sleeve located on the outer side, and the mesh basket body and the film sleeve are arranged in a stacked mode in the radial direction of the inner catheter. The mesh basket body is formed by weaving a plurality of filaments, and the filaments at least comprise shape memory alloy wires. The utility model can realize the positioning and plugging effect at the specified position in the subsection bronchial tube, the mesh basket mechanism automatically opens to achieve the plugging function, and the utility model has the advantages of convenient operation and strong practicability.

The utility model discloses a coaxial mesh basket negative pressure catheter, which relates to the technical field of stone removal medical instruments and structurally comprises a first tube and a second tube, and the first tube slides relative to the second tube. A net basket is arranged at the tail end of the first pipe; a stone crushing part sliding relative to the first pipe is arranged in the first pipe, an energy release part is arranged at the tail end of the stone crushing part, and the center of the mesh basket and the center of the energy release part are coaxial with the first pipe; the head end of the first pipe is bifurcated and is provided with at least two first interfaces or a connecting piece, and the connecting piece at least comprises three second interfaces; wherein one of the first interface or the second interface is connected with a negative pressure mechanism. According to the coaxial net basket negative pressure catheter, the stone is fixed in the net basket through the binding effect of the net basket, the position between the energy release part and the stone basically does not move relatively during stone crushing, the stone crushing efficiency is higher, and the operation time is shortened; other tissues are not damaged, and higher safety is realized; the lens is protected and is prevented from being damaged by gravel energy; and non-direct-vision touch typing is realized in combination with a contrast agent.

Disclosed is a foreign body removal device, relating to the field of medical instruments. The foreign body removal device comprises a foreign body removal part (100), an adjustment part (200), and an operation part (500). One end of the foreign body removal part (100) is weaved and gathered to form a gathered part (120), the operation part (500) is fixedly connected to the tail end of the gathered part (120), the adjustment part (200) is annularly arranged on the outer side of the gathered part (120), and one end of the adjustment part (200) is fixedly connected to the operation part (500). The overall diameter of the foreign body removal device is extremely small, which is reduced by 50% or more compared with the overall diameter of a traditional stone removal basket product, and the foreign body removal device can be directly fed into a smaller cavity. The positions such as the biliary tract and the intestine can be easily reached, and meanwhile, the effective rotation of the foreign body removal part (100) can be ensured under various bends, thereby greatly expanding the application range of stone removal and foreign body treatment.

The present application relates to the technical field of surgical medical instruments and particularly to a driving and control handle and a calculus-extracting mesh basket. The driving and control handle comprises an outer tube, an inner tube, a connector, and a rotary knob. The outer tube is provided with a limiting groove, and the inner tube comprises a fixed part and a sliding part. The sliding part is connected to the connector and provided with a first limiting piece. A sliding cavity is formed in the near end of the sliding part, and a mounting channel is formed in the fixed part. The fixed part comprises a sliding stage located at the far end, and a sliding stroke is formed between the sliding stage and the sliding cavity in an axial direction. The sliding part of the present application, as a part of the inner tube, is arranged in the outer tube and protected by the outer tube, reducing the exposed area of a reciprocating action gap, further reducing or eliminating the risk of clamping the palm and the probability of a foreign object falling into the reciprocating action gap, and improving the operational stability and convenience of the driving and control handle and the calculus-extracting mesh basket. Moreover, the outer tube and the fixed part can provide a fixed holding support part, further improving the comfort and convenience when an operator performs a holding action.

The utility model relates to the technical field of ERCP operations, and discloses a calculus removing mesh basket assembly facilitating opening of a nipple opening. Comprising a beam tube, a movable lead screw, a mesh basket body, a fixed handle and a movable handle, wherein the movable lead screw is located in the beam tube, and the two ends of the movable lead screw penetrate out of the beam tube; the mesh basket body is arranged at the end of the movable lead screw; the fixed handle is arranged at the end, away from the mesh basket body, of the beam tube; a guide pipe extending in the beam tube direction is arranged on the outer wall of the beam tube, a hollow guide wire with the two ends penetrating out of the guide pipe is arranged in the guide pipe, a bent part used for being embedded into a nipple opening is integrally arranged at the end, close to the mesh basket body, of the hollow guide wire, and air bags used for expanding the nipple opening are arranged on the two sides of the bent part. An inflation nozzle used for being externally connected with inflation equipment is arranged at the end, away from the bent part, of the hollow guide wire, and when the two air bags are in an inflation state, the two air bags are in a V shape in the nipple opening, and a gap allowing the net basket body to penetrate through is formed in the middle of the two air bags.

The application provides a thrombus removing support and system, and relates to the technical field of medical devices.The thrombus removing support comprises a support and a basket supported on a distal end section of an elongated operating rod, the support and the basket both have an expanded state relative to an initial state, the support comprises a frame body, the frame body has a shape expanded into a cage structure, and the frame body is used for cutting or scraping a thrombus; the basket comprises a rib and an aperture, and the basket is used for intercepting or capturing a free thrombus; a radial supporting force of the support is greater than a radial supporting force of the basket, or a radial supporting capacity of the support is greater than a radial supporting capacity of the basket; the thrombus removing support in the scheme combines the functions of cutting and capturing, and can process different types and states of thrombus in one operation.

The invention discloses an automatic fastening mechanism of a mesh basket catheter and the mesh basket catheter, and relates to the technical field of medical instruments.The automatic fastening mechanism of the mesh basket catheter comprises an inner and outer sleeve set and an outer thread fastening sleeve, and the inner and outer sleeve set comprises a pressing pipe and an inner thread fastening sleeve; the pressing pipe and the internal thread fastening sleeve are used for jointly clamping the end part of the nickel-titanium sheet; one end of the external thread fastening sleeve is provided with an anti-falling piece used for abutting against the inner wall of the pressing pipe. After the end of the nickel-titanium sheet is clamped and fixed between the pressing pipe and the internal thread fastening sleeve, the external thread fastening sleeve is connected into the internal thread fastening sleeve in a threaded mode, and in the process, the external thread fastening sleeve drives the anti-disengaging piece to move and abut against the end face of the internal thread fastening sleeve; and due to the extrusion effect, only the anti-falling piece is propped open and abuts against the inner wall of the pressing pipe, so that the pressing pipe is fastened relative to the internal thread fastening sleeve, it is guaranteed that the end of the nickel-titanium sheet is kept fixed, and the falling risk caused by glue bonding is avoided.

The utility model provides a multifunctional calculus extraction net basket, including net basket cap, outer sheath, net basket, connecting pipe and handle, net basket cap sets up at the head end outside of outer sheath, net basket and connecting pipe are placed in the inside of outer sheath, the head end of net basket is connected with the tail end of net basket cap, and the tail end is connected with the head end of connecting pipe, connecting pipe is inserted to the inside of outer sheath through the tail end of outer sheath, and the tail end of connecting pipe is connected with handle, and handle is located at the tail end outside of outer sheath, the utility model has multiple functions, can be directly placed into to common bile duct and carries out calculus extraction, also can be placed into to common bile duct, intrahepatic bile duct and gallbladder duct under the guidance of guide wire and carries out positioning calculus extraction, when the huge calculus is taken out, can be placed into the guide wire and carries out lithotripsy through the guide wire channel, and then the broken stone is taken out.

The utility model provides a kind of wire guide calculus extraction net basket, including net basket, guide wire, net basket cap, outer sheath and handle, tail end of guide wire is connected with the head end of net basket cap, net basket cap is placed in the head end outside of outer sheath, net basket is inserted to the inside of outer sheath through the tail end of outer sheath, one end of net basket is connected with the tail end of net basket cap, other end is connected with handle;Handle is located in the tail end outside of outer sheath.The utility model can be inserted through papilla incision knife, SpyGlass or insight pancreatic duct imaging system channel etc.Various instrument channels, realize the calculus extraction treatment of multiple scenes;During the release of net basket, soft guide wire head end crosses stone more easily into the distal bile duct, more conducive to the release of net basket, and net basket can be taken out of stone by pulling back.

The invention discloses an adjustable bent mesh basket ablation catheter and a preparation method thereof. The catheter comprises a mesh basket assembly, a sleeve, a front push-pull ring, a side push-pull button, a handle, an irrigation element, a far-end tube, an elbow adjusting tube, a near-end tube, a head end fixing piece, a middle electrode ring, a magnetoelectric positioning sensor, a pull ring, a pull wire, a magnetoelectric positioning sensor wire, a wire, an end electrode ring and an insulating sleeve. The ablation catheter has the advantages that the front end of the ablation catheter is of the mesh basket structure, the mesh basket structure can be flexibly unfolded or contracted, two different diameters can be switched at any time, electrodes on the ablation catheter are well attached to tissue, stability is high, the ablation catheter can be suitable for different pulmonary vein opening anatomical structures, the contact area of the mesh basket assembly and the tissue is increased after the ablation catheter is unfolded, and the ablation effect is good. Therefore, the time required by ablation is shortened, the irrigation structure in the catheter is beneficial to reducing tissue damage and reducing thrombus occurrence, the catheter also has mapping, navigation and treatment functions, the time of instrument replacement is shortened, and the treatment effect is improved.

The invention belongs to the technical field of medical instruments, and particularly relates to a hepatobiliary surgery clinical calculus removing device which comprises a shell tube, a groove is formed in the middle of the outer surface of the shell tube, a telescopic tube is inserted into the shell tube, a probing tube is fixedly connected to the bottom of the telescopic tube, and a calculus removing mechanism is fixedly connected to the outer surface of the probing tube; by means of the arranged calculus removing mechanism, in the clinical calculus removing process of the hepatobiliary surgery department, an air bag and a net basket are used in cooperation, when the air bag is inflated, the air bag can form a semicircular space or a space with other proper shapes, calculus can be guided to enter the net basket which is placed in advance, and the calculus can be gently contacted and pushed in the operation process; by controlling the expansion degree of the air bag, a doctor can adjust the size of the air bag and the applied pressure according to the actual situation, it is ensured that the stone can be firmly grabbed, the stone cannot be broken into smaller fragments due to excessive compression, and therefore the risk of small stone residues is avoided.

The utility model belongs to the field of endoscope calculus removing net baskets, and particularly relates to an endoscope calculus removing net basket convenient to use, which comprises a handle tube, a holding mechanism is arranged on the outer side of the handle tube, a knob is mounted on the outer side of the right end of the handle tube through a bearing, and a guide ring is fixedly connected to the left portion of the inner wall of the handle tube. A guide wire is slidably connected to the interior of the guide ring, a mesh basket is fixedly connected to the end, away from the handle pipe, of the guide wire, and two symmetrically-distributed guide strips are fixedly connected to the outer side of the guide ring. By additionally arranging the screw rod, the gear, the driving frame and other structures in the handle pipe, the screw rod can be driven to rotate through meshing fit between the gear and the inner gear ring in the using process, and the driving frame can be driven to move through threaded fit between the screw rod and the threaded sleeve in the rotating process; when the driving frame moves, the guide wire can be driven to be inserted, and therefore the insertion speed can be effectively controlled.

This invention discloses a basket body and a stone retrieval basket, belonging to the field of medical device technology. The basket body, used in stone retrieval baskets, includes at least two basket wires. The distal ends of the basket wires are fixedly connected to each other, and the proximal ends of the basket wires extend towards the proximal end of the stone retrieval basket. The distal portions of the basket wires can deform in a direction away from the axis of the basket body to form a basket structure for capturing stones. At least one basket wire is a gel wire, and at least one basket wire is a magnetic guide wire. The gel wire is hollow inside and has an inlet and an outlet communicating with its interior. The inlet is used to inject magnetic hydrogel, and the outlet is used to discharge magnetic hydrogel. The outlet is located at the distal end of the gel wire. This application uses gel wires and magnetic guide wires as basket wires, forming a basket body. Under the operator's control, it captures fragmented stones inside the body. By utilizing the magnetic hydrogel discharged from the gel wire and the magnetic guide wire in combination, the clearance rate of residual stones is improved, and the operation time is shortened.

The utility model relates to the technical field of medical instruments, in particular to a urinary plugging calculus removal catheter capable of achieving negative pressure suction, which comprises a catheter body, one end of the catheter body is a plugging part, the other end of the catheter body is connected with a negative pressure device, the plugging part is configured to be switched between an opening state and a containing state, and when the plugging part is in the opening state, the negative pressure device is connected with the negative pressure device. The plugging part is bent to form a spiral plugging structure, and a plurality of suction openings used for sucking broken stones under the negative pressure effect of the negative pressure device are formed in the plugging part. According to the utility model, the plugging part and the suction port on the plugging part are utilized to integrate the functions of plugging, calculus removal and the like, so that the times of taking out and entering a human body cavity caused by insufficient endoscope cavities are reduced, the injury of the instrument to the human body cavity is reduced, the pain of a patient is reduced, and the working efficiency is improved. In addition, the broken stones are sucked through negative pressure, so that the problem that a mesh basket is loose when a traditional mesh basket is pulled during stone removal can be avoided, and stone removal is more thorough.

This invention discloses an integrated intestinal obstruction decompression and suction scraping device, relating to the field of medical device technology. It includes a handheld main unit, a disposable suction tube, and a transparent collection bag. The tail end of the disposable suction tube is detachably connected to the front end of the handheld main unit, and the transparent collection bag is detachably installed on the side of the handheld main unit. The handheld main unit houses a drive motor, and the front end of the drive motor has a transmission shaft. This invention utilizes the dual rotational crushing and scraping functions of the scraping head and the basket-shaped scraper. When the head end of the inner spiral outer tube encounters fecal impaction, it can directly initiate rotational scraping within the intestinal lumen, breaking up the fecal impaction and suctioning it out under negative pressure. This achieves unblocking without removal from the body, avoiding mechanical damage to the intestinal wall caused by repeated insertion and removal. By integrating the crushing, suction, and scraping functions into a single device, the smoothness of the procedure is improved.

The present invention discloses a novel blocking and stone removal catheter, comprising a controller, one end of the controller is provided with a non-slip handle, the other end is connected to the catheter through a movable tube support, the lower end is provided with a tube support tightening button, the top is provided with a tube groove, one side of the top is provided with a fixed tube support, the upper end is provided with a hydrogel storage tube, and one side is provided with a tube push knob, the hydrogel storage tube stores hydrogel, the outlet end is connected to the hydrogel delivery tube, a piston is provided inside, the other end of the hydrogel delivery tube is connected to the needle tube, the catheter is connected to the scope gap through the scope tube, connected to the hydrogel delivery tube gap through the hydrogel tube, connected to the occluder gap through the occluder tube, and connected to the laser lithotripter gap through the optical fiber tube, the occluder comprises a mesh cover deployment controller, a wrapping tube and a memory metal mesh cover, and by providing hydrogel-assisted lithotripsy, the problems of insufficient blocking force in the basket structure, the basket formed when the occluder is opened having gaps, and the inability to completely block the lithotripsy, etc. are solved.

The utility model discloses a telescopic mesh basket, and belongs to the technical field of calculus removing mesh baskets. The device comprises: an outer tube; the core shaft penetrates through the outer pipe; the mesh basket sleeve at least comprises two mesh basket wires, one ends of the two mesh basket wires are fixed to form an end point, the other ends of the two mesh basket wires are fixed to the end of the mandrel to form a convergence point, each mesh basket wire comprises a first shaping section and a second shaping section which are connected to form a corner point, one end of each first shaping section is located at the end point, and one end of each second shaping section is located at the convergence point. The curvature of the first shaping section and the curvature of the second shaping section at the corner point are discontinuous. The opening degree of the net basket sleeve can be accurately adjusted according to the size and position of stones or foreign matters, so that the capturing success rate is improved; the size of the mesh basket sleeve is adjusted in real time in the operation process, operation time is saved, and efficiency is improved; damage to surrounding tissues can be reduced due to the small initial opening degree; the same device can be used for stones of different sizes and types, the requirement for surgical instruments is reduced, the cost is reduced, and the surgical preparation process is simplified.

The utility model discloses an umbrella-shaped common bile duct calculus removal net basket, which relates to the technical field of calculus removal net baskets, and comprises a catheter, a connecting rod, a net basket, a net bag and a joint, one end of the connecting rod is positioned in the catheter, and the outer side of the connecting rod is fixedly connected with a sliding limiting component. The connecting rod is conveniently pushed by arranging the sliding limiting assembly, so that the mesh basket and the net bag matched connector are opened to form an umbrella shape, small stones can pass through a gap formed between the umbrella-shaped edge and the net and enter the net to be taken by the mesh basket, and the problems that due to the fact that metal wires of an existing stone taking mesh basket are prone to transverse displacement, the shapes are not fixed, and the stones are prone to slipping off are solved. Meanwhile, the problems that when the calculus removing balloon is full, the root of a nipple is prone to tearing and bleeding, a patient with common bile duct dilatation is difficult to remove calculus, small calculus is prone to being sucked into the bile duct when the balloon is cleaned, calculus removing fails, inconvenience is caused in the using process, and the using effect of the calculus removing net basket is reduced are solved.