86 results about "Fistula" patented technology

A catheter for forming a fistula between two vessels. The catheter comprises a catheter body having a longitudinal axis, an electrode extending radially from the catheter body for contacting a vessel wall and forming the fistula, and a cutting unit disposed proximally or distally of the electrode for cutting a venous valve.

The application discloses an arteriovenous fistula system, and relates to the technical field of medical devices, which comprises a fistula catheter, a handle, a power transmission line and a power output controller. The application makes the operation of the fistula catheter head more convenient, realizes accurate detection of the relative displacement amount of the head electrode, makes the fistula catheter head not loosen even if the external force disappears after being closed, improves the structure of the heating electrode, and makes the size and angle of the fistula not adversely affect the blood flow. The application adds blood flow, blood pressure, temperature and other sensors in the fistula catheter, cooperates with the control function of the power output controller, realizes accurate detection of the opening and closing state of the fistula catheter head, automatic detection of the arteriovenous vessel wall capture, safe output of energy and heating control of the fistula catheter head electrode. The application is more beneficial to the operation of doctors in clinical use and can obtain better fistula effect.

The application relates to a blood vessel anastomosis device, which comprises a first support and a connecting piece. The first support is provided with a first opening penetrating the inner and outer walls of the first support, and the first opening is used for being opposite to a first fistula position on a first blood vessel. The connecting piece comprises a pipe part and a first clamping part connected to one end of the pipe part. The connecting piece is provided with a blood flow channel penetrating the pipe part and the first clamping part along the axial direction of the pipe part. The pipe part is arranged in the first opening, and the first clamping part is arranged on the inner wall side of the first support and matched with the inner wall of the first support, so as to seal and clamp the blood vessel wall around the first fistula on the first blood vessel. The blood vessel anastomosis device saves the operation time, improves the operation efficiency, and improves the operation safety and postoperative recovery effect.

The invention relates to a hemodialysis fistula stenosis automatic detection and grading method and system. Acquiring multi-mode ultrasonic data of the arteriovenous fistula; labeling the multi-modal ultrasonic data by adopting a five-level labeling standard to establish a two-dimensional labeling system; preprocessing the two-dimensional ultrasonic structure image in the two-dimensional labeling system to obtain a segmentation result of the fistula area; narrow parameters are calculated based on the segmentation result; extracting hemodynamic parameters based on the blood flow spectrum data in the two-dimensional labeling system; constructing a multi-feature fusion deep learning architecture; extracting an image feature map of the preprocessed two-dimensional ultrasonic structure image through a ResNet50 architecture based on an image branch; based on parameter branches, the stenosis parameters and the hemodynamic parameters are fused and converted to obtain a parameter feature map; fusing the image feature map and the parameter feature map to obtain a fused feature; and predicting the fistula stenosis level based on the fusion features to obtain a five-level stenosis grading result. The efficiency and reliability of hemodialysis fistula analysis are improved.

The application discloses a percutaneous gastric interventional fistula device, which comprises a drill, a fixing assembly and a fistula tube drill, the drill is hollow, the end of the drill is provided with a puncture part, the puncture part can drill a fistula hole on an abdominal wall and a gastric wall, the fixing assembly is arranged on the outer wall of the drill and can fix the drill on the fistula hole and seal the fistula hole, and the fistula tube is communicated with the drill, and nutrient liquid can sequentially pass through the fistula tube and the drill and enter a stomach. The percutaneous gastric interventional fistula device can conveniently perform fistulization and simultaneously reduce operation time.

The invention belongs to the technical field of medical instruments, and discloses a gastrointestinal tract magnetic clipping fistulization assembly and application thereof. The assembly comprises at least two magnetic bodies, each magnetic body is provided with a clamping end face, the effective length of each clamping end face is 3-5 cm, the width of each clamping end face is not smaller than 0.2 cm, and a clamping gap of 2-4 mm is formed between the stomach wall and the intestinal wall when the two magnetic bodies are attracted. The assembly can adopt an integral structure, a split structure, a bendable structure or a concave-convex clamping structure, and the magnetic body is provided with a fixing structure and a guide assembly. Laparotomy and minimally invasive implantation are not needed, permanent foreign matter residues are avoided, a stable permanent anastomosis channel can be formed, the risk of complications such as adhesion and leakage is reduced, the device is suitable for patients with refractory digestive tract obstruction, and fistulization safety and success rate are improved.

The present application relates to a kind of anastomosis equipment.The anastomosis equipment includes repair assembly and anastomat;Repair assembly includes at least one patch, various the patch is respectively used for different operation;Anastomat includes shaft assembly, anvil and nail bin, anvil and nail bin are connected to shaft assembly, anvil and nail bin can be relatively closed, various patch is used to install in anvil or nail bin, anvil and nail bin are configured to operate to anastomosis position, and patch is applied to corresponding anastomosis to achieve occlusion and reinforcement by operation.This application at least one patch, so as to cooperate with anvil and nail bin, so that various patch is adhered to corresponding anastomosis under its corresponding operation, so as to reduce the proportion of stomal fistula and bleeding at incision, improve the reliability and adaptability of anastomosis equipment.

Embodiments of catheters, methods, and devices for endovascular treatment of a blood vessel uses a catheter. The catheter includes a catheter body including a distal end and a distal tip assembly (100) movably connected to the catheter body at the distal end of the catheter body. The distal tip assembly includes a plurality of tips (102. 104. 106) that nest together and of which each comprises a fistula forming element and a support shaft. At least one of the plurality of tips is independently movable relative to an adjacent one of the plurality of tips between a retracted position and an extended position to provide a treatment region therebetween. WO

A stent is provided with a central portion between two end portions, and with the central portion narrower than the end portions to provide a stenosis within the stent, such as for improving function of a dialysis graft or fistula. The stent can be merely a metal wire cage or can additionally include a liner inside and / or outside of the metal cage. One stent includes tapering transitions between the end portions and the central portion. The stent can be self-expanding with a retracted form held by a surrounding sheath until the sheath is retracted and the stent returns to its biased expanded form. A balloon can provide a radial expansion force to expand the stent. The balloon or self¬ expansion can expand the stent partially, with the central portion narrower than the end portions, and optionally further expanded to have a diameter matching that of the end portions.

This invention relates to the field of medical device technology for hemodialysis, and discloses a fixator for the upper limb of the arteriovenous fistula during hemodialysis. The fixator includes a space cotton pad, with a cushioning cotton pad adhered to the inner side of the space cotton pad, and a self-adhesive elastic bandage adhered to the inner side of the cushioning cotton pad. A fixing layer is fixed to the upper surface of the space cotton pad. The invention features three adjustable straps on the outside of the fixator, each strap covering the space cotton pad and a medical polymer splint, securing the arm so that the space cotton pad and medical polymer splint completely surround the arm, preventing further bending. The tightness of the arm fixation can be adjusted by the interaction of the round and barbed ends of the Velcro straps. The complete enclosure of the arm by the space cotton pad and medical polymer splint effectively fixes the upper limb, achieving the effect of not affecting blood flow and not constricting the arm.

The present invention provides a medical device for forming an opening channel or access passage between body tubular lumens. [Solution] The present invention relates to a device that uses an elongated body, a proximal holding portion, and a distal holding portion to bring the muscle layers of a first body lumen and a second body lumen into contact and to form a long-term or permanent opening or access channel between them. The medical device comprises an elongated body that forms a lumen and includes a proximal portion, a distal portion, a certain length, and a certain diameter, wherein the elongated body 310 may have an elongated tubular form (e.g., a restrained form, an unexpanded form, or a transport form) and a retracted form (e.g., an unrestrained form, an expanded form, or an unfolded form) in which the proximal portion 312 expands radially into the proximal holding portion 314 and the distal holding portion 322 expands radially into the distal holding portion 324, with a cylindrical saddle portion 328 extending between them.

The present invention relates to: a fistula treatment device that enables easy insertion of a sponge into an accurate position by an endoscope, the sponge being inserted into a fistula; and a fistula treatment system using same. The objective of the present invention is to provide a fistula treatment device and a fistula treatment system using same, wherein, when a fistula occurs in an organ, a tube provided with a sponge at an end thereof is coupled to an endoscope and, while viewing an image captured by the endoscope, the position of the fistula in the organ can be rapidly found, and the sponge can be easily inserted into the fistula.

The utility model discloses an intestinal fistulization plugging device, which relates to the technical field of medical instruments and particularly comprises a plugging structure, a gas storage bottle and a plugging plug. The sealing air bag is connected with the bottom of the gland, the shaping ring is fixedly connected with the other end of the sealing air bag, the inflation tube is connected with the middle of the gland, the inflation air bag is fixedly connected with the bottom of the inflation tube, and the top of the inflation tube and the top of the gland are located at the same height. An inflation inlet matched with the sealing plug is formed in the middle of the top of the inflation pipe, and the bottom of the inflation pipe is located below the shaping ring. According to the intestinal fistulization stoma plugging device, through the arrangement of the outer plugging structure and the inner plugging structure, internal sealing and external sealing of an intestinal fistulization stoma can be achieved, multiple sealing of the intestinal fistulization stoma is achieved, and the sealing performance of the plugging device is improved. Due to the arrangement of the air storage bottle, the plugging device can achieve quantitative inflation of the inflatable air bag, and the sealing effect of the inflatable air bag is guaranteed.

The invention discloses an expandable self-adaptive bionic tissue repair nail. The expandable self-adaptive bionic tissue repair nail comprises a nail cap and a nail body which are made of biodegradable materials, the nail cap is a double-layer film layer, and the layer, away from the nail body, of the nail cap is a smooth compact layer. The layer, close to the nail body, of the nail cap is a porous support layer, and the surface of the porous support layer is integrated with a combining mechanism tightly attached to the tissue surface. The nail body is of a hollow net-shaped structure, and the inner cavity of the nail body is filled with swellable and biodegradable porous hydrogel; the nail body can be in a compressed and folded compact state in a dehydration state and is expanded and unfolded after encountering water; drugs are loaded in the porous hydrogel. Before implantation, the repair nail is in a dehydrated slender state; after implantation, the internal hydrogel swells when encountering liquid, an irregular fistula channel is filled with the net-shaped structure in a self-adaptive mode, meanwhile, an inner opening is sealed by the nail cap, physical bacteria blocking is achieved, and the nail cap serves as a regeneration support to actively promote repair. The device can be implanted in a minimally invasive mode, can expand in a self-adaptive mode after operation so as to be tightly attached to tissue, and meanwhile has the anti-infection function and the active repair promoting function.

The invention relates to a three-dimensional teaching model construction system and method for intracranial arteriovenous fistula, and relates to the technical field of medical modeling, and the system comprises a multi-modal image enhancement module which carries out the enhancement of a multi-modal image set through a blood vessel edge, and obtains an enhanced multi-modal image set; the point cloud skeleton generation module is used for performing point cloud generation and skeleton extraction on the multi-modal image set to obtain a three-dimensional blood vessel point cloud and a blood vessel skeleton; the blood vessel sub-point cloud division module is used for dividing the three-dimensional blood vessel point cloud to obtain divided three-dimensional blood vessel sub-point clouds; the blood vessel sub-point cloud recovery splicing module is used for shielding, detecting and recovering the divided three-dimensional blood vessel sub-point clouds, and carrying out splicing and analogue simulation to obtain a recovered three-dimensional blood vessel model; and the orificium fistulae identification and correction module is used for performing blood flow path tracking and orificium fistulae identification and correction and obtaining a target three-dimensional blood vessel teaching model. The problems that traditional teaching depends on two-dimensional images or simple models, real blood vessels and blood flow cannot be restored, teaching efficiency is low, and clinical risks are high are solved.

The utility model discloses an improved medical decompression vest, including vest front cloth and the fixed connection of vest back cloth outside the left and right sides of vest front cloth and vest back cloth are equipped with the sleeve, and the upper end of vest front cloth and vest back cloth is equipped with the neck, the outside of vest front cloth is sewed up with needle face magic tape, and needle face magic tape is connected with the bonding of wool face magic tape. The improved medical decompression vest, through the setting of splicing cloth belt and first limit hook, can utilize first limit hook and first connecting buckle of different positions to connect, change the neck pressure of the patient wearing the vest, facilitate the treatment of the cervical lymphatic fistula patient, thereby improve the comfort of the use of the vest, through the control of the buckling of different position second connecting buckle and second limit hook, can adjust the pressure of the clavicle position of the chylous fistula patient, thereby facilitate the stable pressure control of the patient, accelerate the recovery of the patient's condition.

The utility model discloses a disposable abdominal wall drainage ostomy bag, which relates to the field of medical appliances, and comprises a drainage bag main body, a drainage tube, a connecting mechanism and an anti-regurgitation mechanism, the connecting mechanism is used for connecting the drainage bag main body with an orificium fistulae position of a patient, and the anti-regurgitation mechanism is used for preventing seepage of the drainage bag main body. One end of the drainage tube penetrates through the inner cavity of the mounting hole and penetrates out of the fixing opening, the drainage tube is extruded and fixed through the fixing opening, the rubber base plate is attached to the skin of a fistula of a patient, the fistula is protected, seepage enters the inner cavity of the rubber base plate and downwards flows into the inner cavity of the drainage bag body, and therefore the fistula is protected. When the liquid flows downwards, the bottom of the valve is extruded and expanded, seepage downwards enters the inner cavity of the drainage bag body, and when the liquid in the drainage bag body flows out of the liquid inlet, the valve blocks the liquid, and the liquid is prevented from flowing back.

A system for forming a fistula includes a first catheter, a second catheter, one or more magnetic field sensors, a user output device, and a control unit. The first catheter includes one or more first catheter magnetic elements and a fistula-forming element. The second catheter includes one or more second catheter magnetic elements. The one or more magnetic field sensors are configured to output a magnetic field signal. The control unit is configured to determine a distance of separation of the first catheter from the second catheter based the magnetic field signal from the one or more magnetic field sensors and output a ready signal with the user output device in response to determining that the distance of separation of the first catheter from the second catheter is a predetermined distance or less.

A catheter for forming a fistula between two vessels. The catheter comprises a housing, an electrode disposed at least partially within the housing. The electrode comprises a distal portion, a proximal portion and an intermediate portion therebetween for contacting a vessel wall and forming the fistula. The catheter further comprises a valve destruction wire disposed at least partially within the housing for contacting and destroying a venous valve.

A novel shape memory polymer (SMP)-based device for surgical treatment of an intracorporeal defect (e.g., a void or anomaly) such as an intracranial aneurysm or fistula. In at least one non-limiting embodiment, the SMP device is a 3D-printed SMP material sized to specifically fit and thus occlude an intracranial aneurysm (ICA). The SMP device may be delivered to the intracorporeal defect via a catheter having a heating mechanism wherein the SMP device is raised above its glass transition temperature as it is deployed, causing the SMP device to return to its permanent shape after it is deployed into the intracorporeal defect. SMP device delivery systems that include the SMP devices, as well as methods of making and using the devices and systems, are also disclosed.

This invention relates to the field of medical device technology, and in particular to a tracheostomy cannula fixation and correction device with a support structure, comprising a protective pad; a neck limiting member is fixedly connected to one end of the protective pad, and two sets of hook-shaped shoulder limiting members are also fixedly connected to one end of the protective pad; each shoulder limiting member has a sliding groove on its opposite side, and an adjusting rod is provided in each sliding groove, with a correction module fixedly connected to the center of the adjusting rod; a limiting bolt is also provided above the shoulder limiting member, and the limiting bolt is spirally connected to the adjusting rod; the protective pad and the shoulder limiting member cooperate to be clamped on both sides of the patient's shoulders to achieve limiting fixation; a support ring is located above the cannula to facilitate the subsequent connection of the connecting tube and the cannula; the connecting connector is clamped above the support ring and docks with the cannula at the bottom; the support ring can effectively support the connecting tube, prevent the trachea from tilting in all directions, prevent the connecting tube from pulling the cannula and compressing the tissue around the fistula, and ensure the quality of fistula recovery.

An exercising device with fistula maturation management and assessment abilities and a method of fistula maturation management and assessment is described. The device is a tool for remote monitoring of compliance of exercise routines prescribed to Chronic Kidney Disease (CKD) patients for proximal fistula maturation. The device measures and syncs exercise data captured via a motion-sensing sensors (eg: a MEMS / NEMS micro-electro-mechanical systems or nano-electro-mechanical systems or other techniques - based accelerometer, gyroscope, magnetometer, inertial measurement unit etc.) and via computational device (eg: mobile phone, tablet, or an onboard device) to a cloud platform (eg: cloud platform, such as Amazon web service [AWS], Google cloud etc.) from which the Nephrologist can retrieve patient data and check for compliance.

The present disclosure includes kits, compositions, and methods useful in medical procedures, such as treatment of a fistula or other target site in a subject. In some examples, a kit may include a dry particulate mixture, a first pharmaceutically acceptable buffer solution having a pH in the range of about 3 to about 5, and a second pharmaceutically acceptable buffer solution having a pH in the range of about 9 to about 11. The dry particle mixture may include a plurality of polyethylene glycol particles and a plurality of collagen particles.

The invention belongs to the technical field of wound nursing, and discloses a wound nursing guidance system for remote synchronous video recognition, which comprises a video acquisition module, an AR measurement module, a dual-channel calculation module, a data fusion module and a specified suggestion generation module, the video acquisition module is used for performing video data acquisition work; the AR measurement module can dynamically superpose a preset virtual scale template in a corrected video image frame, and the dual-channel calculation module is used for calculating a wound necrosis regression rate and a granulation growth slope through dynamic indexes and quantifying a wound change trend, a sneaking depth and a flaccid paralysis node through a parallel processing mechanism. The AR measurement module augmented reality overlaps a virtual scale, the length, width, area, volume, sneaking, sinus tract and flaccidity duct parameters of a wound are accurately marked in a real-time video stream, meanwhile, the wound necrosis regression rate and the granulation growth slope are calculated through the two-channel calculation module, the wound change trend, sneaking depth and flaccidity duct nodes are quantified, and the wound necrosis regression rate and the granulation growth slope are calculated through the two-channel calculation module. The rate evolution track of the wound of the patient can be conveniently monitored.

The invention belongs to the technical field of medical instruments, and discloses an extendable gastrointestinal decompression tube suitable for upper gastrointestinal cancer surgery, which comprises a tube body, a through main drainage channel is arranged in the tube body, the tube body is divided into a far-end straight tube section, an extendable section and a near-end straight tube section, a far-end anchoring head is arranged at the end of the far-end straight tube section, and a near-end anchoring head is arranged at the end of the near-end straight tube section. A main drainage hole is formed in the end of the far-end anchoring head, a drainage side hole is formed in the side wall of the far-end straight pipe section, and the main drainage hole and the drainage side hole are communicated with the main drainage channel. The extendable section is a corrugated pipe; the tail end of the near-end straight pipe section is detachably connected with an activation and connection module; in an initial state, the corrugated pipe is in a contraction state, and under the traction of external force, the corrugated pipe is subjected to plastic deformation, is straightened and is kept in an extension state without retraction. The decompression tube can avoid potential damage to an anastomotic stoma caused by blind insertion of a stomach tube after a traditional operation, so that the risk of complications such as bleeding, edema and even fistula of the anastomotic stoma is effectively reduced, the operation safety is improved, and the operation difficulty of placing the gastrointestinal tube is remarkably reduced.

A device for creating an arteriovenous (AV) fistula includes a proximal base having a distal tapered end surface and a distal tip connected to the proximal base and movable relative to the proximal base. The distal tip has a proximal tapered end surface. A first heating assembly, including an energized heating element, is disposed on at least one of the distal tapered end surface and the proximal tapered end surface. A second heating assembly, comprising a passive non-energized heat spreader, is disposed on the other one of the distal tapered end surface and the proximal tapered end surface. The distal tapered end surface and the proximal tapered end surface are adapted to contact opposing sides of a tissue portion to create the fistula. The taper of the proximal tapered end surface matches the taper of the distal tapered end surface, so that the two surfaces match one another.

Methods and apparatus for creating an anastomosis or fistula between the gallbladder and an adjacent organ are disclosed. First, a parent magnet, typically a permanent magnet, is deployed in the stomach, small intestine, or another organ adjacent to the gallbladder, and a mating daughter material is deployed in the gallbladder in order to create a magnet-compression anastomosis. The gallbladder may then be ablated or otherwise functionally inactivated through the anastomosis. Another aspect of the invention relates to an all-in-one surgical kit that contains all the necessary specialized tools for a surgeon to perform the procedure.

An implant 801 for closing an opening in tissue such as a fistula or a sinus comprises a coil having a substantially uniform outer diameter. The coil forms an internal passage having a diameter that tapers from a distal end to a proximal end. The implant 801 may be delivered using a non-tapered driver coil 820.

The utility model discloses a portable intestinal juice collection and transfusion device for treating intestinal air fistula, which aims to simplify the operation process of intestinal juice collection and transfusion, protect the fistula orifice, facilitate the carrying of a patient, enhance the clinical applicability and reduce the maintenance cost. The device is small and exquisite in structure and comprises a stoma cover, a collecting bottle, a flow guide pipe, a feedback pipe, a peristaltic pump and other core components. Wherein the stoma cover is provided with a through hole which is used for fixing the flow guide tube and the feedback tube. A collecting opening and a liquid supplementing opening are formed in the top of the collecting bottle, the collecting opening is connected with the flow guide pipe, and the liquid supplementing opening is provided with a detachable sealing plug so that nutrient solution or clear water can be conveniently added for flushing. A stirring mechanism can be further arranged in the collecting bottle and used for mixing the nutrient solution and the intestinal juice and cleaning the collecting bottle at the same time. In addition, through the design of a plurality of detachable and replaceable parts, the maintenance cost and the use difficulty are reduced, and the use experience and the treatment effect of the patient are improved.