75 results about "Surgical failure" patented technology

A cannula assembly including a camera system to help provide multiple viewing angles of a surgical site. This added visualization provides the surgeon with more comprehensive feedback during the surgical procedure, leading to better patient outcome and a reduction in the surgical failure rate. The cannula has a main lumen and a smaller secondary lumen and is insertable into the surgical site for easy surgeon adaptation. The camera is coupled to the secondary lumen toward the side of the cannula. This allows the camera to provide visualization without obstructing the main lumen for the use of tools. The camera wiring runs through a long tube connected to the camera and through a handle at the end of the tube without blocking access to the surgical site.

The present invention provides a method for positioning defective bone restorer of human body and skull defect position in surgery with the guiding of navigator through designing a spatial positioning mark. The possibility of surgery failure caused by the error placing position of restorer can be reduced through the method of the invention. The restorer can be accurately positioned through the spatial positioning mark, the skull model which is provided with the positioning mark, the restorer mark provided with positioning, DICOM data which has marked ball output, and the navigator which can read out the DICOM data.

The invention provides an ultrasonic-based craniotomy robot system. The system comprises a remote control center, a craniotomy control module, an ultrasonic signal secondary processing three-dimensional imaging module, a surgical execution module and an instrument working module. The remote control center is used for receiving image data, determining the location of a brain lesion, and initially planning a surgical path. The craniotomy control module is used for planning a secondary surgical path. The ultrasonic signal secondary processing three-dimensional imaging module is used for utilizingultrasonic waves to carry out three-dimensional imaging, and performing an ultrasonic surgical operation according to the secondary surgical path. The surgical execution module is used for performingsurgical operation according to a real-time image. The ultrasonic-based craniotomy robot system solves the problem of low surgical success rate or even inability to perform an operation due to lack of a professional neurosurgeon in a remote area, the surgical success rate is improved, guidance of the lesion position is automatically carried out, the recovery period of a patient is greatly shortened, and risk of a surgery failure is reduced.

The invention relates to a puncture endoscope used for attached observation for puncturing and orientation in percutaneous nephrolithotomy, solving the technical problems of poor puncture accuracy, big amount of bleeding, high operation failure rate and poor safety of the existing appliances used in percutaneous nephrolithotomy. The puncture endoscope comprises a main endoscope body, an image transferring unit, a lighting unit, an ocular unit and a puncture body. The puncture body is composed of a puncture needle and an indwelling catheter. The ocular unit is composed of an ocular cover, an ocular lens and an ocular glass. The image transferring unit is composed of a multi-filament image transferring rod arranged inside a hollow outer tube of the puncture needle. The lighting unit is composed of a light beam collet which can be connected with the main endoscope body, a light beam interface which is arranged on the light beam collet and can be connected with an external light source, a light cone arranged inside the light beam interface, and a light transferring component which can transfer the external light source which passes through the light cone to the imaging surface of the multi-filament image transferring rod. The puncture body is fixedly arranged at the front end of the main endoscope body. The puncture endoscope has the advantages of good visibility during operations, high puncture accuracy, less bleeding, high operation success ratio and high safety and is unnecessary to be charged with water.

The invention discloses a femoral artery direct puncture needle, comprising an integrated cylindrical needle body and needle handle, a separation wall is arranged in the inner channel, the inner channel is axially divided into a left channel and a right channel which are independent, the port of the left channel is an inclined left contrast channel outlet, a left contrast channel is arranged at the needle handle part of the left channel, the port of the right channel is a right contrast channel outlet which is in backward direction with the left contrast channel outlet, a right contrast channel is arranged at the needle handle part of the right channel, the left channel and the right channel are provided with an unidirectional haemostasis valve respectively, the ports of the right contrast channel and the left contrast channel are respectively provided with a heparin cap. When the puncture needle is used for the intervention treatment, even though the puncture needle enters the femoral artery, the seal wire is ensured to enter the target blood vessel, the invention solves the problem that the puncture is done again because the seal wire enters the femoral artery after radiography, even the operation is failure and the patient feels the pain.

The invention discloses a medical vertebral pedicle strengthening screw consisting of a screw sleeve and a self-tapping screw in mutual fit, wherein, the screw sleeve is made from medical absorbable materials and has certain mechanical strength and toughness; the medical absorbable materials can effectively maintain the mechanical strength in vivo for 2 to 3 months; the screw sleeve is divided into a head end, a middle section and a tail end, wherein, the head end of the screw sleeve is sealed up and in a hemispherical shape, the middle section is provided with a longitudinal crack, and a cone-shaped hollow cavity is formed at the tail end thereof; and the self-tapping screw is made of medical titanium alloy and consists of a thread section and a tail part, wherein, the thread section is formed by connecting a cone-shaped tip part and a cylinder in external-thread design, a U-shaped groove penetrating in a radial direction is formed at the tail part, and internal threads are formed on the inner wall of the U-shaped groove. The invention is able to improve the stability of internal fixation in the process of the primary screw placement in an osteoporosis situation and reduce the incidence that the pedicle screw becomes loosened or even prolapsed, thus enhancing the stability and reliability of the internal fixation of spines and lowering the failure rate of operations.

The invention discloses a transurethral ureter hard convection negative-pressure channel broken stone remover and relates to the field of medical apparatus and instruments. The transurethral ureter hard convection negative-pressure channel broken stone remover comprises an import mirror tube and a broken stone nephroscope tube which are used in matched with a ureteropyeloscope; the import mirror tube or the broken stone nephroscope tube is a metal hard tube, and the shape and the size of the cross section of the whole tube are the same; a sheath tube is a round thin-wall metal hard tube; a gap between the broken stone nephroscope tube and the sheath tube form a water outlet channel with equal cross section area; and [the outer circumference Fr(sheath tube) of the cross section of the sheath tube]*k is equal to the outside perimeter Fr(broken stone nephroscope tube) of the cross section of the broken stone nephroscope tube, and k is equal to 0.35 to 0.65. The transurethral ureter hard convection negative-pressure channel broken stone remover can solve the problem of operation failure caused by the facts that stones are difficult to appear and the operation channel is lost because the sheath tube is imported into the operation part at inaccurate position, and can solve the problems that the operation time is prolonged, the residual stones are excessive and the operation risk is increased because of low absorbing and removing speed of the broken stones and residues caused by the facts that the pressure in pelvis is not liable to rapid and free adjustment and a relief control valve cannot be adjusted flexibly and smoothly in the broken stone removing process.

The invention belongs to the technical field of medical instruments, and provides an auxiliary brace for shaping an aneurysm interventional micro-catheter; The auxiliary brace can be used for solvingthe technical problems of the prior art that the treatment of aneurysms by microcatheter interventional embolization will bring the difficulties in shaping microcatheters, inaccurate shaping, the success of microcatheter shaping cannot be guaranteed relying on the doctor's subjective judgment and prolonging the operation time, surgical failure could be caused. At the same time, the present invention also provides a method for manufacturing the above-mentioned microcatheter shaping auxiliary brace, according to different structures of different patients and blood vessels. An auxiliary brace consistent with the vascular structure of the patient's lesion was made and obtained. Through the definition and restraint of the auxiliary brace, the conventional high-temperature fumigation can be usedfor precise molding at one time, which greatly improves the accuracy of shaping the microcavity. One molding can save a lot of pre-operative preparation time, avoiding the problem of repeated shapingduring surgery and delaying the operation time.

The invention provides a surgical suture with reinforced barbs. The surgical suture comprises a slender body, wherein the slender body is a single-stranded suture with a smooth outer surface; at leastone barb is arranged on the slender single-stranded suture; the barbs are arrayed in one direction or double directions and can be positioned on the single side or the symmetric double sides of the slender single-stranded suture; and the barbs which are positioned on the symmetric double sides can be positioned at the same position or different positions of the slender single-stranded suture. Atleast one annular groove is formed in the lower edge of each barb, a biological adhesion agent coats the inside of each groove; at least one circle of suture is wound in each groove; after winding ofthe suture is finished, each groove is filled with a filling agent completely and smoothly. By the surgical suture with the reinforced barbs, the fixing strength of the single-stranded suture barbs can be improved effectively, the barbs are prevented from failing or being stripped from an axle of the suture, and the risk of failing of a clinical suture surgery is relieved.

The invention relates to a built-in electric foreskin circumcision device comprising a motor, an ejection sleeve, a U-nail collar, and a foreskin cutting cover; the motor is connected with or makes contacts with the ejection sleeve, and used for pushing the ejection sleeve forward; the ejection sleeve is connected with or makes contacts with the U-nail collar, and used for pushing the U-nail collar forward; the motor is connected with or makes contacts with the foreskin cutting cover; the motor can drive the U-nail, thus preventing unstability and various risks caused by artificial driving; the motor can drive the U-nail with adjustable and stable pushing force, thus preventing surgery failure caused by the U-nail breaking the foreskin tissue when overlarge force is applied, and preventing haemostasis failure caused by unthoroughness of nail reversion when too small force is applied; a switch can adjust the propulsion distance and speed, so the built-in electric foreskin circumcise device can suit different surgery objects and environments.

The invention relates to a non-piercing microwave ablation antenna, which comprises a radiator and a radiator cover, wherein the radiator is located at the front end of an antenna, the radiator coveris sleeved on the radiator, and the front end of the radiator cover is a blunt tip. Because the front end of the radiator cover applies the design of blunt tip, the special non-piercing shape enablesthe antenna to freely travel in the lung tissue but not penetrating the blood vessels and bronchi of the lung, and the tumor angiogenesis exists in the GGO cannot be damaged by the blunt head portionto cause bleeding, the operation failure rate because the lesions can not be identified due to the bleeding in the lung is reduced, meanwhile the possibility of diffusion of the tumor cells through the piercing passage and bleeding blood vessels is prevented. The front end of the blunt tip can press the GGO lesions without passing through GGO, and the lesions is enabled to be compacted and the volume is reduced obviously, the ablation space is reduced and the lung tissue is protected maximum. Because the non-piercing microwave ablation antenna is different from the traditional mode which passes the lesions to ablate normally, and the influence of the ablation passage in the lesions to the sample of pathological biopsy is prevented.

The invention relates to a disposable puncture endoscope used for attached observation of a puncture body in percutaneous nephrolithotomy, solving the clinical restrictions of poor puncture accuracy, big amount of bleeding, high operation failure rate and poor safety of the existing appliances used in percutaneous nephrolithotomy. The puncture endoscope comprises an ocular unit, an image transferring unit, a main endoscope body, a lighting unit and a puncture body. The puncture body is composed of a disposable puncture needle and an indwelling catheter. The disposable puncture needle comprises a hollow outer tube and a plastic needle body. The ocular unit is composed of an ocular cover, and an ocular glass and an ocular lens which are arranged inside the ocular cover. The image transferring unit is composed of a multi-filament image transferring rod arranged inside the hollow outer tube of the puncture needle. The front end of the main endoscope body is connected with the plastic needle body of the puncture needle and the back end of the main endoscope body is connected with the ocular cover of the ocular unit. The lighting unit is composed of a built-in lighting component and a detachable lighting component. The puncture endoscope has the advantages that the puncture endoscope is good in visibility during operations, high in puncture accuracy, less in bleeding, high in operation success ratio and high in safety and is unnecessary to be charged with water.

The invention relates to the field of medical apparatus and instruments, and especially relates to a THA surgical guide plate and a construction method thereof. The construction method of the THA surgical guide plate model includes the following steps: providing the three-dimensional model of a to-be-repaired part; constructing a guide plate body based on the surface of acetabulum and the outer side surface of iliac ala adjacent to the acetabulum; constructing a guiding part, wherein the guiding part includes a guiding hole, the guiding hole faces toward the outer side surface of the iliac ala, and the extension direction of the guiding hole is consistent to the expected orientation of acetabulum cup prosthesis; constructing a positioning hole based on a marking point on the surface of theacetabulum, wherein the positioning hole extends to the marking point along the outer side of the guide plate body; and constructing a holding part based on the outer side of the guide plate body. During THA surgery, the provided THA surgical guide plate can guide doctors to determine the placing positions and orientations of the acetabulum cup prosthesis, so that the placing precision of the acetabulum cup prosthesis can be enhanced, surgery failure rates can be reduced, and patients can be guaranteed that more comfortable living experience can be achieved after recovery.

The invention relates to an anastomat, which comprises a body, a pin bin which is arranged on the body, a pin pushing plate which is arranged inside the pin bin, and a push rod which is arranged on the body and used for pushing the pin pushing plate, wherein the front end of the push rod is provided with a push part which contacts the pin pushing plate; the lower end face of the push part is flush with the lower end face of the pin pushing plate; and a limit stop is pressed below the pin pushing plate and connected with a reset mechanism which drives the limit stop to upspring. After the suturing process is over each time, the push rod can be retracted, the pin pushing plate is rested on the front of the pin bin, and the limit stop upsprings under the action of the reset mechanism and prevents the push rod from pushing the pin pushing plate to suture again, so that the anastomat has the function of locking the hollow pin bin and surgical failure can not be caused due to reutilization of the hollow pin bin.

The invention relates to a composition for preventing scar adhesion, a postoperative anti-adhesion material and application. Epidural scar adhesion is an important cause of postoperative lumbar surgery failure syndrome, and the invention aims to provide a drug-loaded postoperative sealing material which can seal wounds and realize stable release of drugs at the same time. The invention firstly provides the mitomycin C-IFN gamma-sodium hyaluronate conjugate for preventing scar adhesion, the conjugate can effectively inhibit scar tissue formation and slow down the drug degradation speed, and when the conjugate is applied to a polyethylene glycol sealant, the sealing effects of low swelling and rapid condensation can be achieved. The product is especially suitable for spinal surgeries such as laminectomy and the like, and has good clinical application value.

The invention discloses a femoral artery direct puncture needle, comprising an integrated cylindrical needle body and needle handle, a separation wall is arranged in the inner channel, the inner channel is axially divided into a left channel and a right channel which are independent, the port of the left channel is an inclined left contrast channel outlet, a left contrast channel is arranged at the needle handle part of the left channel, the port of the right channel is a right contrast channel outlet which is in backward direction with the left contrast channel outlet, a right contrast channel is arranged at the needle handle part of the right channel, the left channel and the right channel are provided with an unidirectional haemostasis valve respectively, the ports of the right contrast channel and the left contrast channel are respectively provided with a heparin cap. When the puncture needle is used for the intervention treatment, even though the puncture needle enters the femoral artery, the seal wire is ensured to enter the target blood vessel, the invention solves the problem that the puncture is done again because the seal wire enters the femoral artery after radiography,even the operation is failure and the patient feels the pain.

The invention discloses an interventional catheter auxiliary device for emergency nursing, and relates to the field of medical instruments, the interventional catheter auxiliary device comprises an auxiliary seat main body, the two sides, away from each other, of the auxiliary seat main body are provided with matched tightening bandages, the top of the auxiliary seat main body is provided with a visible through hole, and a driving friction roller and a clamping friction roller are arranged in the visible through hole, and matched guide pipe clamping grooves are formed in the circumferential side of the driving friction roller and the circumferential side of the clamping friction roller. Through the arrangement of a tightening bandage, a driving friction roller, a clamping friction roller, a rapid adjusting assembly, a fine adjusting assembly and a movable clamping assembly, the device can be fixed to the body of a patient, a catheter can be accurately and stably inserted into a lesion position, accurate operation is guaranteed, and through the arrangement of a rotation stopping assembly, the catheter can be accurately and stably inserted into the lesion position. And the position of the catheter can be fixed, so that the situation that the catheter displaces to cause operation failure during operation is prevented.

The invention discloses a using method of a sternum closure assembly. The method comprises the following steps: measuring the width of sternums and selecting a suitable type of sternum closure fixture; respectively mounting a first fixing member and a second fixing member of the sternum closure fixture on the corresponding left arm and right arm of a sternum closer; pre-closing two sides of the sternums, then separately hooking the first fixing member and the second fixing member onto both sides of the sternums, inserting a rack, and rotating a closing button so as to gradually draw close theleft arm and the right arm of the sternum closer and to further drive the first fixing member to insert into the second fixing member until the sternums are tightly closed without a gap; locking a locking wheel on the first fixing member with a locking member by rotating, and removing the sternum closer; and repeating the above S2-S4 on the upper side and / or lower side of the sternums, and installing 3-4 sternum closure fixtures. The assembly. has the advantages of easy operation, high stability, safety and reliability, and reduces the risk of surgical failure to some extent.

The invention discloses a medical heat pipe drill bit for cortical bone processing. The medical heat pipe drill bit for cortical bone processing comprises a cortical bone processing drill bit body; the cortical bone processing drill bit body comprises a drill bit section, an airtight device and a heat pipe heat exchange section; the drill bit section is located at the front end of the cortical bone processing drill bit body and used for drilling cortical bones; the front end of the heat pipe heat exchange section is connected with the rear end of the drill bit section; the rear end of the heat pipe heat exchange section is connected with the airtight device; the airtight device comprises a plug, a fan-shaped sealing ring, an ejector rod, a spring, a valve piece and an end face sealing ring; the fan-shaped sealing ring is fixedly installed on the plug; when the plug rotates, the fan-shaped sealing ring can seal a negative pressure air exhaust hole or a liquid injection hole or seal the negative pressure air exhaust hole and the liquid injection hole at the same time; and the plug can be pushed by external force to move forwards to push the ejector rod, so that the end face sealing ring moves forwards to remove sealing of the front end of the valve cavity. The problems of cell damage and operation failure caused by too high temperature in the cortical bone drilling process are solved; and the expected heat dissipation effect is achieved by designing the heat pipe structure in the drill bit.

The invention relates to an injection bone filling composition which is a semi-solid slurry. The slurry is mainly obtained by uniformly mixing a pulvis and a blended aqueous solution, wherein the pulvis includes a calcium sulfate powder and a calcium phosphate powder and the calcium phosphate accounts for 20-60 wt% of the gross weight of the pulvis; and the amount by weight of the blended aqueous solution is 20-50 parts relative to 100 parts by weight of the pulvis. The slurry has viscosity of 20,000 poise to 80,000,000 poise. The injection bone filling composition provided by the invention has a wide blending operation time period, which is beneficial to blending operation of bone cement for doctors and helps minimize the possibility of surgical failures.

The invention discloses a guiding device for an anterior cervical internal fixation and relates to the technical field of medicinal instrument and apparatuses for an orthopedic surgery. The guiding device comprises a positioning plate and a guider, wherein the positioning plate comprises a development board and a fixing plate; positioning holes are uniformly formed in the positioning plate; the guider comprises a fixing rod, a guiding arm, a guiding rod and a fastening device. According to the guiding device disclosed by the invention, a doctor is enabled to conveniently and accurately determine implantation points and implantation angles of pedicle screws, and the difficult problems of operation failure and injury to artery and nerve are easily caused when anterior cervical pedicle screws are fixed due to difference of angles and positions of pedicles of different patients are solved; by matching with a steel plate for use, the guiding device has beneficial effects that a fixing effect is excellent, and enough stability can be provided; secondary operation for fixing is not needed, so that pains of the patient and medical expenses are reduced; rehabilitation speed is high, and the like.

Provided are methods for diagnosing an increased risk of failure in a female pelvic organ prolapse surgery. Also provided are devices and kits for detection of a SNP associated with increased risk of failure in a female pelvic organ prolapse surgery.

The invention relates to the technical field of medical instruments, and discloses a femoral tunnel guiding and positioning device for anterior cruciate ligament reconstruction. The femoral tunnel guiding and positioning device comprises a clamping piece; a thigh of a patient and a 3D printed femur can be clamped through a first spring clamp and a second spring clamp on the clamping piece; the femur of the patient is parallel to the 3D printed femur through an adjusting device; the tunnel exit position and the tunnel length can be determined on the 3D printed femur through a measuring scale, and the tunnel exit position and the tunnel length on the patient femur parallel to the 3D printed femur are determined after the tunnel exit position and the tunnel length on the 3D printed femur aredetermined, so that the direction and the length of the tunnel are conveniently controlled, and the risk of surgical failure is reduced; meanwhile, a kirschner wire outlet point can be prevented fromdeviating, the situation that the rear wall of the lateral condyle of the femur is broken due to deviation of the kirschner wire outlet point is avoided; and the femoral tunnel guiding and positioningdevice has the advantages of being novel in design, simple in structure, easy to operate, capable of preventing the kirschner wire outlet point from deviating and capable of conveniently controllingthe direction and length of a tunnel.

The invention provides a novel scalp retractor for separating a scalp artery and belongs to the technical field of medical instruments. A conventional scalp double tooth top sharp hook has severe damage to scalp, a retracted scalp edge blocks a surgical area and the accidental injury of a target artery directly affects successful performance of a surgery and even causes failed surgery. The technical scheme of the inventive patent is that: the novel scalp retractor for separating the scalp artery is applied to various superficial skin surgeries in the surgery field of a horizontal hook retractor and comprises a small blunt cerebral plate hook which is connected with a tough, well-adaptable and replaceable rubber band and a sharp single tooth hook. The invention has the advantages that: the novel scalp retractor for separating the scalp artery can prevent a projecting scalp edge from blocking the surgical area, and avoid frequent fall of a scalp hook and the accidental injury of the target artery; and the novel scalp retractor contributes to successfully and efficiently separating a superficial temporal artery or an occipital artery so as to establish a communication cycle between an internal carotid and an outer artery.

The invention discloses a breath positioning device for CT-guided percutaneous lung biopsy and an application method thereof. The positioning device comprises a support part and a human body identification part, the support part comprises a triangular support which is provided with a fixing sliding rod, and a laser lamp fixing support for fixing a laser lamp is slidingly arranged on the fixing sliding rod; the human body identification part comprises a supporting plate, two fixing clamps are arranged on the lower portion of the supporting plate, suction cups are arranged at the four corners ofthe supporting plate, and a transparent plate with a scale is arranged on the supporting plate; during use, the height of the laser lamp is adjusted, laser points fall on the transparent plate, the puncture breath control condition is determined according to the positions of the laser points on the transparent plate during breath, and it is guaranteed that a biopsy needle is inserted to a presetlevel; the scanning radiation dose and the complication risk caused by multi-time puncture are reduced, the surgical failure risks are greatly reduced, and the puncture success rate is increased; thedevice is low in cost and operation difficulty and has high clinical value and social and economic benefits.

The invention discloses a frameless locator for a minimally invasive surgery in the neurosurgery department, and relates to the field of the neurosurgery department. The frameless locator for the minimally invasive surgery in the neurosurgery department comprises a bed body; the bottom of the bed body is fixedly connected with a first standing plate and a second standing plate; the first standingplate and the second standing plate are located on the head side and the tail side of the bottom of the bed body respectively; a lead screw is rotationally connected between the first standing plate and the second standing plate through a bearing; the lead screw is sleeved with a horizontal positioning block; a threaded hole is formed in the horizontal positioning block; the horizontal positioningblock is in threaded connection with the lead screw through the threaded hole; a transverse supporting plate is fixedly connected to the side wall of the horizontal positioning block; and a supporting block is fixedly connected to the bottom of the bed body. According to the frameless locator for the minimally invasive surgery in the neurosurgery department, before a puncture needle is inserted into a cannula, the puncture angle, position and height of the cannula can be adjusted in advance, so that a beginner can operate conveniently, the phenomenon of surgical failure caused by incorrect insertion position and angle of the puncture needle is prevented, and the pain of a patient is reduced.

The invention discloses a circumcision anastomat. The circumcision anastomat comprises an electric drive mechanism, a push body, a nail bin and a circumcision cutter, wherein the electric drive mechanism is suitable for driving the push body to perform reciprocating movement along the axial direction of the push body, the nail bin sleeves the front end of the push body, the circumcision cutter isarranged in the push body, a glans penis base is arranged at the front end of the nail bin, and the push body is suitable for driving the front end of the nail bin and the front end of the circumcision cutter to be butted with the glans penis base in sequence under the driving of the drive mechanism. For the circumcision anastomat provided by the invention, the electric drive mode replaces the manual driving mode, thus the phenomenon that during the surgery process, the glans penis base moves under the effect of the external force applied by a medical worker, then the prepuce wrapping the glans penis base displaces, consequently, cutting errors occur and re-cutting is needed, is avoided, in addition, due to the adoption of the electric driving, the working strength of the medical worker isalleviated, meanwhile, the phenomenon that during the surgery process, the medical worker is out of force, and thus the failure of the surgery is caused, is avoided.

An in-situ fenestration device according to the invention comprises a sheath tube, a catheter and a puncture part; the sheath tube is hollow and a first opening is formed in the side wall of the far end of the sheath tube; the catheter is arranged in the sheath tube in a penetrating manner and can move in the axial direction of the sheath tube; the far end of the catheter can extend out of the sheath tube through the first opening; the side wall of the far end of the catheter is provided with a breakover port; the puncture part is arranged in the catheter in a penetrating manner and can move in the axial direction of the catheter; the far end of the puncture part is in a pre-bent shape under a natural state; and when the far end of the puncture part reaches the position of the breakover port, the far end of the puncture part automatically bends and faces the breakover port. According to the in-situ fenestration device of the invention, it can be effectively guaranteed that the puncture part can smoothly pass through the breakover port for puncture, and the accuracy of the puncture position is guaranteed, so that the surgical failure caused by the fact that the puncture part cannot smoothly pass through the catheter or the puncture position deviates is reduced or avoided.