99 results about "AV Anastomosis" patented technology

Systems and methods for monitoring a bypass device for protecting an intestinal anastomosis are provided. The system includes a pump, one or more fluid inlet lines fluidicly coupled to the pump and to a negative pressure chamber of the bypass device, and one or more sensors configured to measure data indicative of pressure within the negative pressure chamber. A controller operatively coupled to the pump and the one or more sensors may be programmed to actuate the pump to generate a vacuum within the negative pressure chamber to thereby pull intestinal tissue towards the bypass device to anchor the bypass device at a target location upstream of the intestinal anastomosis. The controller further may compare the pressure within the negative pressure chamber with a predetermined pressure range and, if the pressure falls outside the predetermined pressure range, adjust the pump to maintain the vacuum within the predetermined pressure range.

Systems and methods for monitoring a bypass device for protecting an intestinal anastomosis are provided. The system includes a pump, one or more fluid inlet lines fluidicly coupled to the pump and to a negative pressure chamber of the bypass device, and one or more sensors configured to measure data indicative of pressure within the negative pressure chamber. A controller operatively coupled to the pump and the one or more sensors may be programmed to actuate the pump to generate a vacuum within the negative pressure chamber to thereby pull intestinal tissue towards the bypass device to anchor the bypass device at a target location upstream of the intestinal anastomosis. The controller further may compare the pressure within the negative pressure chamber with a predetermined pressure range and, if the pressure falls outside the predetermined pressure range, adjust the pump to maintain the vacuum within the predetermined pressure range.

Systems and methods for monitoring a bypass device for protecting an intestinal anastomosis are provided. The system includes a pump, one or more fluid inlet lines fluidicly coupled to the pump and to a negative pressure chamber of the bypass device, and one or more sensors configured to measure data indicative of pressure within the negative pressure chamber. A controller operatively coupled to the pump and the one or more sensors may be programmed to actuate the pump to generate a vacuum within the negative pressure chamber to thereby pull intestinal tissue towards the bypass device to anchor the bypass device at a target location upstream of the intestinal anastomosis. The controller further may compare the pressure within the negative pressure chamber with a predetermined pressure range and, if the pressure falls outside the predetermined pressure range, adjust the pump to maintain the vacuum within the predetermined pressure range.

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.

The invention discloses an end-to-end tissue tube wall precise anastomosis instrument which comprises two clamping and closing forceps, and each clamping and closing forceps is provided with a structure for maintaining a clamping and closing state after clamping and closing and used for enabling the clamping and closing forceps to clamp and fix two end parts of a tissue tube wall needing to be sutured in the clamping and closing state through the clamping and closing maintaining structures; the hard rod body is connected with the two clamping and closing forceps, and the distance between the two clamping and closing forceps is adjusted by adjusting the distance of the hard rod body between the two clamping and closing forceps; and the distance adjusting and locking structure is used for adjusting and locking the position relation between the hard rod body and the two clamping and closing forceps after adjustment. The clamping and closing forceps comprise a forceps tube and a moving rod in the forceps tube, and a rotary opening and closing structure is arranged at the rear end of the moving rod and controls opening and closing of each forceps head through rotation. Through the arrangement, the two forceps tubes are rapidly fixed to the ends of the tissue tube wall, the distance is rapidly adjusted, the clamping and anastomosis states are maintained after operation, additional manual operation is not needed, and the anastomotic tissue tube wall is conveniently sutured.

The invention discloses a small anastomat based on an electromagnetic system. The small anastomat comprises an anastomat main body, an electromagnetic adjusting device, a fixed sleeve and a magnetic ball, the anastomat body comprises a bearing tube and a handle, the handle is fixedly installed at the lower end of the bearing tube, the fixed sleeve is fixedly installed at the front end of the bearing tube, and the electromagnetic adjusting device is installed in the rear end of the bearing tube; the magnetic ball is fixedly and detachably mounted in the fixed sleeve; through the interaction of the magnetic ball and the hard metal sleeve (the metal sleeve is electrified), the pancreatic duct (or bile duct) after broken end ligation can be smoothly sucked in, and then the thermal electrode and the cutting knife which are arranged in the fixed sleeve are used for cutting and anastomosing the intestinal wall and the pancreatic duct (or bile duct), so that the anastomosing effect is achieved; according to the anastomat, anastomosis can be carried out through mutual cooperation of the small magnetic ball and the hard metal sleeve, and after the small metal ball is attracted in a magnetic mode, corresponding tissue is cut off in a mechanical or electric heating cutting mode and then anastomosis is carried out.

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.

Apparatus for endoscopic anastomosis of the stomach and the bowel of a patient to allow food to bypass the duodenum and optionally a portion of the jejunum comprising a tube, surgical apparatus and at least one operating element. The tube is insertable into the stomach and has a proximal end and a distal end. The surgical apparatus is at least partially, preferably completely, insertable through the tube. The operating element, for operating the surgical apparatus from the proximal end, is connected or connectable to the surgical apparatus. The surgical apparatus is configured for establishing anastomosis between a first area of the stomach and a second area of the bowel.

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.

The invention relates to a method, system, and device for protecting an anastomosis between at least two lumens of a body. The method includes identifying a requirement of creating the anastomosis between a first lumen and a second lumen of the at least two lumens of the body. The method further placing a tube made up of a biodegradable material, at a level of the anastomosis, inside the at least two lumens during the anastomosis or after the anastomosis, through a delivery system. It should be noted that the tube covers the anastomosis. The method further includes securing the tube at the level of the anastomosis to seal the tube against walls of the at least two lumens; and protecting the anastomosis by preventing a contact between the anastomosis and luminal contents associated with the at least two lumens of the body, through the tube.

The present invention discloses an asymmetric anastomat with anti-reflux effect for esophagogastric anastomosis, the improvements lie in that the end face of a nail bin is formed by two arc-shaped plates that are bent towards the same direction and connected and closed in an end-to-end manner to form an arc-shaped cavity, nail outlet holes in the arc-shaped plates are provided around the arc-shaped cavity, and a cutter is consistent with the arc-shaped cavity in shape and is attached to the edge of the inner side wall of the arc-shaped cavity; a stapling anvil plate on the bottom face of the nail abutting base is formed by working out a cutting groove in a circular plate, the shape of the cutting groove is consistent with the shape of the arc-shaped cavity in the end face of the nail bin, and nail abutting grooves that match the nail outlet holes in position and shape are formed in the stapling anvil plate. After anastomosis with the asymmetric anastomat for esophagus and stomach in the present invention, redundant esophageal and gastric tissues on the anterior wall are deformed into the stomach to form a tongue piece by suturing to a seromuscular layer, and, in conjunction with manual folding and suturing at the posterior wall, valvula-like tongue pieces that are closed towards each other are formed in the stomach cavity, so that a valvula-like structure is formed together. The anastomotic stoma passage is in a valvula-like closed state when no food is eaten, and the anastomotic stoma is opened due to the peristalsis pressure of the esophagus and an expansion effect of a food mass during eating, so that a cardia-like effect of preventing stomach-esophageal reflux is achieved.

The invention discloses a covered stent for pancreatic-intestinal anastomosis and a manufacturing method of the covered stent. The covered stent comprises a self-expanding stent body which is columnar after being expanded, one end of the self-expanding stent body is a stent pancreas end, a stent jejunum end which protrudes outwards after being expanded is arranged at the position, close to the end, of the other end of the self-expanding stent body, and a membranous material layer for preventing pancreatic juice from leaking is arranged on the surface of the self-expanding stent body; the side, close to the pancreatic end of the stent, of the self-expansion stent body is provided with an annular piece. By adopting the covered stent, the contact stability of the self-expansion stent body and the inner wall of the pancreatic duct can be improved, the use stability of the covered stent is improved, and the pancreatic fistula risk is reduced.

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.

The invention relates to the field of anastomosis devices, in particular to a folding anastomat anvil capable of being inserted in a puncture mode. By splitting and folding the nail anvil, the cross section of the device is reduced on the premise of ensuring sufficient strength, width and diameter of the nail anvil, so that on one hand, the device can be put into a body cavity through the operation hole during an endoscopic surgery, and the difficulty of the surgery is reduced; on the other hand, in combination with an anti-stabbing puncture device, on the premise that the internal organs are prevented from being injured, the hollow internal organs needing to be anastomosed can be punctured and placed with the minimum wound, meanwhile, the hollow internal organs with bacteria and other pathogens inside are prevented from being directly communicated with the clean body cavity, and the infection risk is reduced. After anastomosis is completed, the device can be folded again, the nail anvil can be conveniently taken out of the hollow visceral organ, and the anastomotic stoma of the hollow visceral organ is prevented from being damaged.

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

The utility model discloses a bionic teaching aid for jaw defect in fibula flap reconstruction, and aims to solve the problems that a jaw model adopted in existing jaw reconstruction teaching is poor in visibility, and blood vessels and nerve anatomical structures on the surfaces and inside of a jaw and a fibula are not clear. A mandible model and a fibula model in the bionic teaching aid are made of high-transparency organic polymer materials, and blood vessel and nerve tube channels are arranged in the mandible model and the fibula model and on the surfaces of the mandible model and the fibula model. A transparent hose is arranged in the blood vessel duct, and an elastic rubber band is arranged in the nerve duct so as to simulate blood vessel anastomosis and nerve anastomosis operation during jaw reconstruction. By means of the design, a trainer can visually observe the relation between the resected bone end and the important anatomical structure in the mandible and fibula resection operation and conduct simulation training of blood vessel and nerve microscopic anastomosis.

A medical implant device for Anastomosis of both Aorta Proximal and Distal ends is presented. The device is designed to facilitate the connection between the Aorta and the device, with both ends of the device being one size smaller than the Aorta size. The device features grooves and protrusions located about 8mm from both ends, which are specifically designed to aid in the application of suture loops to tighten the Aorta and block blood flow between the device and the Aorta, respectively. The design of the device aims to simplify the Anastomosis procedure, reducing the time and skill required for the surgeon to perform the procedure, while also improving the overall safety and efficacy of the Anastomosis.

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 kit of parts is provided for forming a device for performing anastomosis a first gastro-intestinal tract. The kit of parts comprises an inner ring, comprising an outer surface generally facing away from the passage, and an outer ring, comprising an inner surface. When the inner ring and the outer ring are in an assembled state, the inner ring is at least partially positioned in the reception volume of the outer ring, at least part of the outer surface of the inner ring faces towards the inner surface of the outer ring, and the outer surface and the inner surface together define an annular space between them, wherein at least part of the annular space converges in the generally axial direction.

The present application relates to a foreskin stapler, including a shell, an anvil, an anastomosis assembly, a firing assembly and a limiting assembly, wherein the anvil is detachably connected to the shell; the anastomosis assembly is movably connected to the shell; the firing assembly is movably connected to the shell, and the anastomosis assembly moves along a first direction under the firing action of the firing assembly to suture and cut the foreskin covered on the anvil; the limiting assembly is movably connected to the shell; when the anastomosis assembly anastomoses the anvil, one end of the limiting assembly abuts against the firing assembly to continuously anastomose the anastomosis assembly with the anvil. The foreskin stapler provided by the present application can ensure the forming effect of the suture staples, and during the continuous anastomosis between the anastomosis assembly and the anvil, the doctor does not need to apply force, thereby reducing the fatigue of the doctor's hands.