52 results about "AV Anastomosis" patented technology

The utility model discloses a clamp type prepuce anastomat which comprises a first anastomosis semi-ring, a second anastomosis semi-ring, a first compression semi-ring, a second compression semi-ring and a cylindrical nail anvil. The anastomosis semi-ring I and the anastomosis semi-ring II are symmetrically distributed and are internally provided with semi-ring cutters, a plurality of anastomosis nails and a plurality of wedge-shaped driving mechanisms; a lower handle I is arranged at the rear end of the anastomosis semi-ring I, a lower handle II is arranged at the rear end of the anastomosis semi-ring II, and the lower handle I and the lower handle II are relatively rotatably connected and spliced into a whole circle; the second upper handle is rotationally connected with the second lower handle, the second anastomosis semi-ring and the second pressing semi-ring are driven to rotate relatively, the wedge-shaped driving mechanisms in the first anastomosis semi-ring and the second anastomosis semi-ring drive the anastomosis nails to move in the radial direction, and the anastomosis nail bending anastomosis procedure is completed. According to the prepuce anastomat, the clamp type design is adopted, the clamp part is aligned with prepuce tissue needing to be anastomosed, and then anastomosis operation can be completed by gently pressing; the operation steps are greatly simplified, and the operation difficulty of doctors is reduced.

The invention provides an intelligent decision-making method and system for free flap riser anastomosis based on hemodynamics. According to the method, firstly, the blood flow direction, the flow speed and the blood vessel wall tension parameter of a target blood vessel are collected, and a dynamic correlation model of intravascular fluid mechanics and external tissue deformation is established; a three-dimensional blood flow pressure gradient map is generated based on the model, then, a system automatically screens an anastomosis path meeting a blood flow resistance threshold value and the endothelial cell survival rate requirement, and the optimal anastomosis pose is determined by analyzing the blood vessel wall elasticity matching degree and the turbulence generation probability. Then, guiding the accurate adjustment of the clamping direction of the blood vessel and the suture needle pitch in the operation, ensuring that the pressure of the lumen of the anastomosed blood vessel is kept balanced when the anastomosed blood vessel is axially stretched, meanwhile, effectively inhibiting local vortex, and remarkably improving the long-term smoothness of the anastomosis of the blood vessel. According to the method, mechanical precise matching and blood flow stable control of free flap vascular anastomosis are achieved, and the postoperative risk is remarkably reduced.

Currently, anastomoses are performed by manual or mechanical suturing. Manual suturing uses unidirectional or bidirectional linear threads. The present invention allows anastomoses to be structured in three dimensions, facilitating access to the anastomotic edges. The device disclosed herein comprises a three-dimensional annular suture means for gastrointestinal and vascular anastomoses, formed by an annular frame (7) with multiple suture threads (6 and 9). The ring (7) defines the size of the anastomosis, functions as a frame for mucosal apposition, and supports the threads (6 and 9), making the anastomosis faster and more precise. The device can be made from absorbable or non-absorbable material, with smooth (6) or barbed (9) monofilament or multifilament threads, the needles (8) of which vary according to the intended use. It can be used in open, laparoscopic or robotic surgeries. It has magnetic strips (12) for organising the needles (8) and a collection array (3) with magnetic receptacles (4) for the safe disposal of the items used. This system contributes to greater efficiency and intraoperative management, ensuring that all of the items are organised and collected correctly at the end of the procedure, optimising the safety and precision of the surgical technique.

Systems and associated methods for minimally invasive creation of anastomoses, in particular the creation of anastomoses to the central vasculature, are disclosed. The systems comprise a delivery catheter configured for percutaneous transluminal insertion through a duct of a patient's body to a target region and a stent graft arranged within the delivery catheter. The stent graft comprises a main tube and at least one branch tube. The branch tube extends from a first end to a second end, wherein the first end is coupled to the main tube.

This application discloses a method and system for microvascular anastomosis modeling and effect prediction in assisted spermatic cord anastomosis, relating to the field of data processing technology. The method includes: extracting the pampiniform plexus topology and varicose vein segments from a three-dimensional vascular tree model of the spermatic veins constructed based on spermatic cord vessel images; determining candidate diversion inlet locations based on the spatial adjacency relationship between the obstructed reflux nodes identified by the varicose vein segments and the pampiniform plexus topology; spatially registering the contour of the inferior epigastric vein segmented from the superficial vein images of the inguinal region with the candidate diversion inlet locations to generate a diversion anastomosis path planning map; constructing the geometric configuration of the end-to-side anastomosis and performing hemodynamic simulation to generate a wall shear stress distribution field, assess the thrombosis tendency of the end-to-side anastomosis, and generate a postoperative patency rate prediction value. This application can predict the risk of thrombosis preoperatively through hemodynamic simulation, providing a reliable basis for surgical planning and effectively improving the success rate of the surgery.

A medical implant device for proximal and distal anastomosis of the aorta is provided. The device is designed to facilitate connection between the aorta and the device, and the size of the two ends of the device is smaller than that of the aorta by one. The device is characterized in that protruding parts are arranged at the positions about 8 mm away from the two ends of the device, and the protruding parts are specially designed to be used for assisting installation of suture rings and used for tightening the aorta and blocking blood flow between the device and the aorta respectively. Once heated or in contact with blood, the constriction sleeve tightly secures the blood vessel and device before and after the protrusions. The design of the device aims to simplify the anastomosis process, reduce the time and skills required by the surgeon to perform the procedure, and improve the overall safety and effectiveness of the anastomosis.

The anastomosis instrument comprises a head part, a waist part and a tail part, the head part, the waist part and the tail part are communicated, and the selected part or all of the side edge of the tail part is bent in the direction away from the inner wall of a second pipeline. According to the anastomosis instrument, the direct and stable instrument is provided, due to the arrangement of the waist part, the first pipeline and the second pipeline can be directly and stably anastomosed, liquid backflow and overflow are avoided, an operation space is provided for suture of a doctor, the doctor can conveniently operate when needing suture, and the difficulty of pipeline anastomosis is greatly reduced. And meanwhile, the side edge of the tail part is partially or completely bent towards the direction far away from the inner wall of the second pipeline, so that long-time hard contact with the inner wall of the second pipeline is avoided, and the second pipeline is well protected.

The invention relates to an anastomosis instrument, which is degradable and comprises a head part, a waist part and a tail part, the head part is in a hollow tubular shape, one end of the head part can be connected with a first pipeline, the waist part is hollow, is arranged between the head part and the tail part and is respectively connected with the other end of the head part and one end of the tail part, the waist part is formed by inwards retracting the other end of the head part, the head part, the waist part and the tail part are communicated, at least part of the tail part is tubular, and the side wall of the tail part is communicated with the waist part. According to the anastomosis instrument, the direct and stable instrument is provided, due to the arrangement of the waist part, the first pipeline and the second pipeline can be directly and stably anastomosed, liquid backflow and overflow are avoided, suture of a doctor is avoided, the difficulty of pipeline anastomosis is greatly reduced, meanwhile, the tubular structure of the tail part is matched with the inner cavity of the second pipeline, and the anastomosis effect is good. The tail part can be effectively prevented from shifting or falling off, and the anastomosis stability and safety are greatly improved.

The utility model discloses an extravascular stent, comprising a rigid first component and a flexible second component, wherein the first component comprises a circumferentially surrounding metal periphery, the second component comprises a dense skirt, one end of the second component is connected to one end of the first component along the axial direction of the circumferentially surrounding metal periphery, the minimum dimension of the inner diameter of the metal periphery is greater than the outer diameter of the first blood vessel, and the maximum dimension of the outer diameter of the skirt is less than the outer diameter of the second blood vessel. The extravascular stent can be sutured to the second blood vessel through the skirt, and can be sleeved outside the first blood vessel through the circumferentially surrounding metal periphery, therefore, the extravascular stent can form a protective structure at the position where the first blood vessel and the second blood vessel are anastomosed, and can protect the anastomosis of the two blood vessels to suppress the vascular oscillation at the anastomosis, thereby maximally preventing complications at the anastomosis and facilitating the stability of the anastomosis.

Methods for creating and maintaining an anastomosis between two adjacent blood vessels using percutaneous techniques, for use in hemodialysis procedures are disclosed and described.

Connectors for end-to-end and / or end-to-side coupling of either anatomical tissue to other anatomical tissue and / or non-anatomical devices to anatomical tissue. The connectors and their variants are each characterized by having at least one mechanically active tine that are actuated by extension or compression of a mechanical mechanism linking the active tines to a frame. The mechanical mechanism may actuate by one or more of shape memory, superelastic, elastic deformation, plastic deformation, electromechanical and / or other motive mechanism operably associated with the at least one mechanically active tines and the frame to rotate the tines about a hinge region under the influence of the mechanical mechanism.

The anastomosis instrument is degradable and comprises a head portion, a waist portion and a tail portion, the head portion, the waist portion and the tail portion are communicated, and the selected part or all of the side edge of the tail portion is bent in the direction away from the inner wall of a second pipeline. According to the anastomosis instrument, the direct and stable instrument is provided, due to the arrangement of the waist part, the first pipeline and the second pipeline can be directly and stably anastomosed, liquid backflow and overflow are avoided, an operation space is provided for suture of a doctor, the doctor can conveniently operate when needing suture, and the difficulty of pipeline anastomosis is greatly reduced. And meanwhile, the side edge of the tail part is partially or completely bent towards the direction far away from the inner wall of the second pipeline, so that long-time hard contact with the inner wall of the second pipeline is avoided, and the second pipeline is well protected.

The utility model relates to the technical field of medical devices, and discloses a laparoscopic pelvic ureteral anastomosis device, comprising a head end and an anastomosis mechanism slidably mounted on the surface of the head end, and a hollow cylinder covered and mounted on the surface of the anastomosis mechanism. The laparoscopic pelvic ureteral anastomosis device, through the cooperation between the head end and the anastomosis mechanism, does not require the doctor to manually sew the two ends of the ureter before anastomosis. The device is inserted into the ureter, so that the head end is in the ureter to be anastomosed, and then the handle is held to pull the hollow cylinder to slide backward and flow out of the first slider and the second slider, so that the first slider is located on the inner wall of the ureter to be anastomosed and the second slider is located on the inner wall of the other ureter, and then the push rod is pushed to make the movable column drive the first guide rod and the second guide rod to move, so that the surfaces of the first slider and the second slider open the ureter, so that one end of the two ureters is concave to the side opposite to the first slider and the second slider.

To attach a donor nerve stump to a recipient nerve for an end-to-side anastomosis.SOLUTION: The problem is solved by the use of a tissue connector. The tissue connector can have a body for receiving the donor nerve stump, and one or more overflaps for attaching the tissue connector having the donor nerve stump therein to the epineurium on the side of the recipient nerve. Suture can also be used to secure the tissue connector and nerves in place.SELECTED DRAWING: Figure 1

The present invention discloses an instrument that can be used for end-to-end precise anastomosis of tissue tube walls, which includes two clamps, each of which is provided with a structure for maintaining the clamping state after clamping, and is used to enable the clamps to clamp and fix the two ends of the tissue tube wall to be sutured in a clamping state through the clamping maintaining structure; a hard rod body connecting the two clamps, and adjusting the distance between the two clamps by adjusting the distance between the hard rod body; a distance adjustment and locking structure, which is used to adjust and lock the positional relationship between the hard rod body and the two clamps after adjustment. The clamps include a clamp tube, a moving rod in the clamp tube, and a rotating opening and closing structure is provided at the rear end of the moving rod to control the opening and closing of each clamp head by rotation. The above arrangement can achieve rapid fixing of the two clamp tubes to the ends of the tissue tube wall, and rapid distance adjustment, and maintain the clamping and anastomosis state after operation, without the need for additional manual operation, and convenient suturing of the anastomosed tissue tube wall.

The invention relates to a chuck assembly of an anastomosis device and a duraspinal membrane anastomosis device thereof. The chuck assembly comprises a first clamping part and a second clamping part rotationally connected with the first clamping part, and the first clamping part is provided with a guide part used for bending and deforming a nail; the second clamping part comprises a nailing device and a nailing piece, the nailing device is rotationally connected with the nailing piece, and the nailing piece is rotationally connected with the first clamping part; the nailing piece can rotate relative to the first clamping part under the driving of external force so that the second clamping part can get close to the first clamping part, and after at least the front end of the second clamping part abuts against the first clamping part, the nailing piece pushes the nail out of the nailing device to the guiding part. The chuck assembly can achieve cooperative work of clamping and anastomosis of soft tissue by driving the nailing piece to move, operation is easy and convenient, the structure is simple, miniaturization is convenient, the chuck assembly can be applied to a duraspinal membrane anastomosis device, minimally invasive surgery type duraspinal membrane closing through a nasal sphenoidal approach, a micro-channel approach and the like is achieved, and the anastomosis effect is good. And the surgical difficulty of clinically closing the dura cerebrospinal membrane is reduced, and the surgical efficiency is improved.

A device, assembly and method for end-to-side connection to anatomical tissue is disclosed. The device includes a tissue connection stent having a proximal closure to create and maintain a substantial degree of hemostasis. The assembly and method include using a tubular graft member coupled to a plurality of distally projecting tines extending from a distal aspect of the graft that couples the graft to an abluminal wall surface of an anatomic passageway, and the tissue connection stent is then introduced through a central lumen of the graft member, into and through an opening created in the wall of the anatomic passageway, and the tissue connection stent is deployed within the opening and a distal flange of the stent is seated against a luminal wall of the anatomic passageway while the proximal closure is maintained in a closed position until it is deployed to allow fluid flow through the stent.

The invention relates to the technical field of medical instruments, and provides an anastomat which comprises a hollow anastomosis tube, and the anastomosis tube comprises a first anastomosis part and a second anastomosis part which are distributed at the two ends; the ports of the first anastomosis part and the second anastomosis part are inclined ports, the outer diameter of the first anastomosis part is gradually reduced from the port to the middle part, and the outer diameter of the second anastomosis part is gradually reduced from the port to the middle part. The first anastomosis part and the second anastomosis part are arranged in an inclined opening and reducing mode, so that the anastomat can conveniently penetrate into blood vessels or lymphatic vessels, the interiors of the blood vessels or the lymphatic vessels can be tightly clamped to the outer walls of the first anastomosis part and the second anastomosis part in a contracted mode, disengaging is not prone to occurring, and therefore the anastomosis effect is good. By using the anastomat, pipeline anastomosis can be carried out very conveniently, and the difficulty of pipeline anastomosis is greatly reduced.

The utility model relates to an anastomosis instrument which comprises a head, a waist and a tail. The head portion is in a hollow pipe shape, one end of the head portion can be connected with a first pipeline, the waist portion is hollow, arranged between the head portion and the tail portion and connected with the other end of the head portion and one end of the tail portion respectively, the waist portion is formed by inwards retracting the other end of the head portion, and the other end of the tail portion is connected with the inner wall of a second pipeline in a matched mode. The inner anti-disengaging piece makes contact with the outer wall of the first pipeline and applies anti-disengaging force to the first pipeline. According to the anastomosis instrument, the direct and stable instrument is provided, due to the arrangement of the waist part, the first pipeline and the second pipeline can be directly and stably anastomosed, liquid backflow and overflow are avoided, suture of a doctor is avoided, the difficulty of pipeline anastomosis is greatly reduced, meanwhile, the inner anti-disengaging piece can effectively prevent the first pipeline from shifting or disengaging, and the anastomosis effect is improved. And the anastomosis stability and safety are greatly improved.

The utility model relates to an anastomosis instrument which comprises a head, a waist and a tail. The head part, the waist part and the tail part are communicated with each other, and the section of the tail part is strip-shaped. The anastomosis instrument is direct and stable, due to the arrangement of the waist part, the first pipeline and the second pipeline can be directly and stably anastomosed, liquid backflow and overflow are avoided, suture of a doctor is avoided, the difficulty of pipeline anastomosis is greatly reduced, and meanwhile the anastomosis effect is improved. The tail with the strip-shaped section is matched with the inner wall of the second pipeline, the clamping face in the radial direction of the second pipeline is larger, displacement or disengagement of the tail can be effectively prevented, and the matching stability and safety are greatly improved.

The invention relates to the technical field of vascular surgery, and discloses a vascular anastomosis device for vascular surgery, which comprises a fixing plate, the upper surface of the fixing plate is fixedly connected with a connecting plate, the right side surface of the connecting plate is provided with a first placing groove, and the upper surface of the fixing plate is fixedly connected with a fixing concave block. A supporting plate is fixedly connected to the right side face of the connecting plate, two positioning plates are fixedly connected to the bottom face of the supporting plate, and a limiting plate is fixedly connected to the left side face of the connecting plate. According to the vascular anastomosis device for the vascular surgery department, through cooperation of a first containing groove, a fixing concave block, an adjusting plate with a groove and a semicircular limiting barrel, a blood vessel can be conveniently placed, the purpose of springing a hemostasis plate to stop bleeding of the blood vessel is achieved through a first sliding rod and a strong spring, and through cooperation of an adjusting wheel, a threaded rod, an adjusting block, a bearing and a containing frame, the hemostasis effect is improved. The effect of adjusting the position of the blood vessel is achieved, and the purposes of butt joint and anastomosis of the blood vessel and the blood vessel at the other end are achieved.

A medical device for an anastomosis is provided. The medical device is distinguished by an inner tubular layer, an outer tubular layer, and a support element defining a longitudinal axis. It is further distinguished by two or more independent C-rings that are angularly distributed and positioned at an acute angle relative to the longitudinal axis of the support element at one end of the support element. The support element and the two or more C-rings are embedded between the inner tubular layer and the outer tubular layer. Envisaged application types are, for example, proximal anastomosis, distal anastomosis, or side-to-side anastomosis in a custom prefabricated graft. Embodiments of the invention can also be incorporated into anastomotic connector device designs. Embodiments of the invention can also be envisaged for vascular graft applications, such as coronary artery bypass grafts (CABG), dialysis access grafts, and peripheral vascular applications.

The invention discloses a highly-anastomotic intelligent anastomat. The highly-anastomotic intelligent anastomat comprises an anastomat body, a nail anvil assembly, a nail bin assembly and a pressure sensing assembly. The disinfection assembly is arranged in the nail anvil assembly, disinfection articles can be attached synchronously after the anastomosis position of the wound is nailed, and the operation process is reduced; a synchronous pushing structure of a suture needle and a disinfectant assembly is arranged in the nail bin assembly, so that the surface of a wound can be quickly disinfected when the wound is sutured, and the wound suturing efficiency is improved; according to the device, a linkage structure integrating suturing, disinfection and disinfection paste attaching is adopted, additional operation steps do not need to be added, in the nail bin assembly, when a wedge-shaped sliding block moves along with the sliding block, a suturing needle can be synchronously pushed to complete wound suturing, a protruding pricking needle can synchronously push a disinfection liquid bag to achieve disinfection, and suturing and disinfection are synchronously conducted; when the blade moves to the tail end of the blade groove, the trigger rod is triggered, the locking assembly is pushed to be unlocked through the trapezoidal push block, and the compression spring pushes the disinfection patch to be automatically attached to the wound.

Robotic systems and methods for assisting in the delivering, navigating, guiding and / or positioning of magnetic implants configured for forming an anastomosis between two adjacent walls of a digestive tract are provided. The robotic system can include at least one a robotic arm engageable with a positioning tool. The positioning tool can include for instance an endoscope, a catheter, or a positioning wand. The positioning tool can contribute to positioning each of the magnetic implants at a corresponding target site of a desired anastomosis, such that the magnetic implants can magnetically couple to each other through the two adjacent walls of the digestive tract to form the anastomosis. Alternatively, the robotic system can include magnetic field generation device and associated external magnetic control assemblies to control a position of the magnetic implants.

A positioning wand for assisting in positioning at least one of a first magnetic implant and a second magnetic implant configured for forming an anastomosis between two adjacent walls of a digestive tract of a patient is provided. The positioning wand can include an elongated member sized and configured to be inserted into an abdominal cavity of the patient, and a distal tip provided at a distal end of the elongated member. The distal tip can include a guide magnet configured to magnetically couple with the at least one of the first and second magnetic implants through a wall of the digestive tract to position the at least one of the first and second magnetic implants to a desired site of the anastomosis. The distal tip can be configured to be moveable in response to a contact pressure upon contact with the wall of the digestive tract.

The utility model relates to an anastomosis instrument which comprises a head, a waist and a tail. The head part is in a hollow tubular shape, one end of the head part can be connected with a first pipeline, the waist part is hollow, is arranged between the head part and the tail part and is respectively connected with the other end of the head part and one end of the tail part, the waist part is formed by inwards retracting the other end of the head part, the head part, the waist part and the tail part are communicated, at least part of the tail part is tubular, and the side wall of the tail part is communicated with the waist part. According to the anastomosis instrument, the direct and stable instrument is provided, due to the arrangement of the waist part, the first pipeline and the second pipeline can be directly and stably anastomosed, liquid backflow and overflow are avoided, suture of a doctor is avoided, the difficulty of pipeline anastomosis is greatly reduced, meanwhile, the tubular structure of the tail part is matched with the inner cavity of the second pipeline, and the anastomosis effect is good. The tail part can be effectively prevented from shifting or falling off, and the anastomosis stability and safety are greatly improved.

The invention relates to the technical field of medical instruments, in particular to a vascular anastomosis auxiliary instrument with hemostasis and anti-adhesion functions, and aims to solve the problems that an existing instrument is limited in application range, prone to causing postoperative complications, unstable in hemostasis effect and insufficient in integration with an anastomosis instrument. The blood vessel anastomosis auxiliary instrument with the hemostasis and anti-adhesion functions comprises an inner supporting assembly, a force application device and an anastomotic stoma fixing ring, the inner supporting assembly is installed in the broken end of a blood vessel to be anastomosed and used for supporting the broken end of the blood vessel, and the force application device is installed on the outer side of the broken end of the blood vessel and matched with the inner supporting assembly. The anastomotic stoma retention ring is used for adjusting the position and posture of the inner supporting assembly, and assists in fixing anastomotic stomas of the blood vessel broken ends which are matched with each other to promote recovery of the anastomotic stomas; the double effects of immediate hemostasis and physical support in an operation are achieved, and precise anti-inflammation and anti-adhesion of an anastomotic stoma are achieved through the synergistic effect of all the structures.

This invention relates to a Chinese-style esophageal anastomosis device, belonging to the field of medical devices. This invention only performs anastomosis, without cutting, which reduces the average tension at the anastomosis site, decreasing the risk of anastomotic damage. It also increases the thickness of the anastomosis site, allowing for longer longitudinal sutures, resulting in a more secure and stable anastomosis. The device has a simple structure, is easy to operate, improves surgical efficiency, and reduces the incidence of postoperative anastomotic leakage. The invention includes a nozzle, a body, and a power supply. Its key feature is that a joint is provided between the nozzle and the body; the nozzle, joint, body, and power supply are sequentially fixedly connected; the joint has a corrugated tube structure and is capable of twisting; the nozzle contains a staple storage device; the nozzle has multiple staple holes; the staple storage device is detachably equipped with staples corresponding to the staple holes; the body contains a staple pushing device; and the body has a switch.

The present invention discloses a vascular anastomosis device in the field of medical device technology, comprising a guide tube, an annular protrusion fixedly connected to the central outer periphery of the guide tube, a cavity defined within the annular protrusion, a cross-threaded ring slidably sleeved in the center of the cavity, the inner wall of the cross-threaded ring having cross-threads, an anastomosis head connected at both ends of the guide tube, and a plurality of fish-scale spines paved on the outer walls of both the guide tube and the anastomosis head. The present invention is novel and efficient, and securely connects the guide tube to the stump of a small blood vessel via the fish-scale spines, thereby providing a blood diversion function. By pushing and flipping the externally protruding member on the guide tube, the area of the externally protruding blood vessel wall is expanded, and the externally protruding member is annularly inserted into the blood vessel wall, locking and anastomosing the stump, thereby improving the efficiency of vascular anastomosis surgery and reducing the occurrence of overlapping anastomosis of blood vessel stumps.

The utility model belongs to the technical field of medical instruments, and particularly relates to a pancreas and intestine magnetic anastomat which comprises a tube body, a flow guide hole is formed in the tube wall of the tube body, a backflow inner hole is formed in the tube body, the flow guide hole is formed in the far end of the tube body, the flow guide hole is communicated with the backflow inner hole, a magnetic ring clamping groove is further formed in the tube body, and the magnetic ring clamping groove is communicated with the backflow inner hole. The outer wall of the magnetic ring clamping groove is connected with at least two magnetic rings in a sleeved mode, an opening spacer sleeve is arranged between the two magnetic rings, organs and tissues needing to be anastomosed are clamped through the magnetic force effect of the magnetic rings, the suturing operation difficulty in an operation is reduced, and the work intensity of a doctor is relieved.