99 results about "Ureteral stents" patented technology

The utility model relates to technical field of ureteral stent solves the technical problem that ureteral stent still needs special operation to take out, especially to a kind of ureteral stent of operation-free convenient to take out, including as the support base ureteral stent body, the ureteral stent body outside is provided with the limiting component for increasing its limiting capacity, the ureteral stent body bottom end is provided with the convenient component for taking out from the patient's body, the convenient component includes the fixed seat fixedly connected in the bottom of ureteral stent body both sides, the utility model discloses because the setting of convenient component, the process of ureteral stent body can be taken out from human body inside more convenient, and will not hurt patient urethra, so that patient oneself can also take out, need not suffer the harm of secondary operation, can also alleviate the burden of doctor simultaneously.

The utility model belongs to the technical field of drainage devices, and discloses a ureteral stent external drainage device which comprises a hard silicone tube arranged outside a patient body, part of the hard silicone tube is located in the patient body, and the liquid inlet end of the hard silicone tube is fixedly connected with a soft silicone tube. The liquid inlet end of the soft silicone tube extends to a pelvis ureter connecting part of a patient to the interior of the ureter along a preset puncture path, a channel for conveying liquid along the preset path is formed between the soft silicone tube and the hard silicone tube, and the diameter of the channel is not smaller than that of the puncture needle; the hard silicone tube is provided with a fixing piece used for fixing the hard silicone tube, the fixing piece is located outside a patient body, after the hard silicone tube and the soft silicone tube are placed in the pelvic ureter in the patient body in an operation, the wound of the connecting portion of the pelvic ureter matched in the operation is supported through the soft tube, and effusion is guided to be discharged through the soft silicone tube and side holes in the soft silicone tube. The device can be placed in the body of a patient for a long time, and the replacement frequency is low.

The ureteral stent tube retracting device comprises a hollow outer tube and an inner tube, one end of the outer tube is provided with a first opening allowing a ureteral stent tube to be inserted, the other end of the outer tube is provided with a second opening, and the inner tube can extend into the outer tube from the second opening and is used for pushing the ureteral stent tube inserted into the first opening out of the first opening. The outer tube is inserted into the urethra, the ureteral stent tube is inserted into the first opening, and the outer tube can push the ureteral stent tube. And when the outer tube is continuously inserted into the urethra, the ureteral stent tube is pushed back into the bladder by the outer tube through the urethra. And the outer tube can ensure that the ureteral stent tube can be smoothly retracted into the bladder. Meanwhile, the inner tube is inserted into the outer tube from the second opening, the ureter support tube is pushed out of the first opening, and the outer tube and the inner tube can be pulled out together. The ureter stent tube and the outer tube can be easily separated through the inner tube, and the situation that the ureter stent tube is displaced due to unsuccessful retraction and unsuccessful separation is avoided.

The utility model relates to the technical field of ureteral stent catheter processing, and discloses a ureteral stent catheter automatic tapping machine which comprises a complete machine base, a sliding way is fixedly connected to the upper side of the complete machine base, a total machine box is fixedly connected to the left side of the upper portion of the complete machine base, and a screw motor is fixedly connected to the right side in the total machine box. A threaded rod is fixedly connected to the output end of the screw motor, a fixing frame is slidably connected to the upper side of the sliding way and the upper side of the threaded rod, a jig is slidably connected into the fixing frame, air cylinder supporting plates are fixedly connected to the two sides of the upper portion of the whole machine base, and pushing air cylinders are fixedly connected to the upper sides of the two air cylinder supporting plates. According to the utility model, the position of the jig does not need to be manually positioned, the accuracy of the trepanning operation position is improved, the stability is improved, the trepanning operation can be carried out on two surfaces of five ureteral stent catheters at the same time, and compared with the traditional manual processing method, the processing production efficiency is greatly improved.

The invention relates to a device (1000) for extracting a stent, in particular a ureteral stent, comprising: a casing portion (199) which is tubular and is connected, at a first end, to a handle portion (300) and has an opening (110) at the second end opposite the handle portion (300); and a catching element (200) which can be moved at least translationally in the casing portion (100) in the longitudinal direction of the casing portion (100) and has a catching portion (210) at the end thereof facing the opening (110) of the casing portion (100), the catching portion being designed to be brought into engagement with the stent. The catching portion (210) is designed in such a way that, after the catching portion (210) has been pushed out of the casing portion (100), the catching portion (210) can be folded down with respect to the rest of the catching element (200).

The utility model provides a ureter support, which relates to the technical field of medical instruments and comprises a tube body, a plurality of drainage holes and a cavity channel for flow guide liquid to pass through are arranged on the tube body, a fixing wire is further arranged on the tube body, the fixing wire is arranged along the axial direction of the tube body, the hardness of the fixing wire is higher than that of the tube body, and the tube body can be shaped by the fixing wire. By arranging the fixing wire, under the condition that the flexibility of the pipe is guaranteed, the fixing strength is improved, the comfort degree of a patient is improved, meanwhile, the stent disengagement risk is reduced, pre-shaping can be conducted before the stent is placed in the body of the patient, the stent is made to be more attached to the physiological structure of the patient, friction between the pelvis and the ureter and the stent in the moving process of the patient is reduced, and the patient is protected. And discomfort and inflammation caused by stent implantation are reduced. Compared with a traditional structure, the auxiliary fixing part is additionally arranged at the tail end of the support, the fixing area is increased through the auxiliary fixing part, fixing devices such as adhesive tape and gauze are matched, and the risk of support slipping caused by in-vitro fixing failure is reduced.

The application provides a ureteral stent with adaptive high radial support force, which comprises a ureteral segment, a renal pelvis end segment and a bladder end segment connected to two ends of the ureteral segment, and drainage holes are arranged on the side surfaces of the renal pelvis end segment and the bladder end segment; the renal pelvis end segment and the bladder end segment are curved segments, and the ureteral segment is a straight segment; the ureteral segment comprises an inner cladding layer, an intermediate adaptive support layer and an outer cladding layer, the inner cladding layer and the outer cladding layer are respectively arranged on the inner and outer sides of the intermediate adaptive support layer, the inner cladding layer is connected to the inner side of the renal pelvis end segment and the bladder end segment in a smooth transition mode, and the outer cladding layer is connected to the outer side of the renal pelvis end segment and the bladder end segment in a smooth transition mode; the intermediate adaptive support layer comprises a plurality of support members, and the plurality of support members are distributed along the axial direction and the circumferential direction of the ureteral segment.

The invention relates to a ureteral stent with a zwitterionic coating and a preparation method thereof.The ureteral stent comprises a stent body and the zwitterionic coating covering the stent body, the zwitterionic coating is formed by a zwitterionic coating composition, and the zwitterionic coating composition comprises a homopolymer or copolymer of zwitterionic and a solvent; the photocuring layer is covalently bonded on the surface of the bracket in a photocuring manner; the zwitterion is selected from phosphorylcholine; the zwitterionic copolymer is at least formed by copolymerizing a phosphorylcholine monomer and a hydrophilic monomer; or the zwitterionic copolymer is at least formed by copolymerizing the phosphorylcholine monomer, the hydrophilic monomer and the photosensitive monomer. The copolymer / homopolymer of zwitter-ions is covalently fixed on the surface of a base material in a photo-initiation mode, the coating is firm and stable, the coating with hydrophilic lubrication and zwitter-ions simultaneously can be constructed on the surface, the high lubricity function and the high anti-crystallization function are both considered, and the efficient anti-crystallization effect is synergistically achieved.

The application relates to the technical field of antibacterial coating ureteral stents, and discloses an antibacterial coating ureteral stent, which comprises a telescopic liquid-permeating mechanism, and both ends of the telescopic liquid-permeating mechanism are provided with fixing mechanisms. The antibacterial coating ureteral stent and the implanting device thereof are provided with the telescopic liquid-permeating mechanism, the fixing mechanism, the guide wire mechanism and the pushing mechanism, can form elasticity through the vortex fixed end pipe and the spring permeation pipe during use, can self-adapt to the elastic telescoping of the ureter when the patient's body position changes or moves, and can form storage for the end part through the multilayer vortex structure of the vortex fixed end pipe, so that rigid contact of the top end with the renal pelvis and the bladder wall is avoided, and the comfort of the patient is improved.

Provided in the present invention are a degradable ureteral stent and a preparation method therefor, which degradable ureteral stent is of a hollow circular tube structure (1), wherein a fixing structure (2) for preventing sliding is disposed on two ends or one end of the degradable ureteral stent, the tube wall of stent is also provided with a plurality of penetrating drainage side holes (3), and the material used for the stent is a composite material formed by at least a glycolide-ε-caprolactone copolymer, an ethylene oxide polymer and a medical developer. In the glycolide-ε-caprolactone copolymer, the weight percentage content of glycolide is 51-58%, such that the copolymer has appropriate mechanical strength and hardness, and the copolymer gradually becomes soft as the time of degradation increases; moreover, a certain proportion of the ethylene oxide polymer is added, and after the degradation thereof, the polymer has a lower modulus at a definite elongation and is softer and smoother, such that degraded fragments are not prone to becoming stuck and are easier to excrete from the body, and is thus more suitable for preparing a degradable ureter.

A ureteral stent and a manufacturing method of a ureteral stent are applied to the technical field of medical instruments, to effectively reduce ureteral stent failure in fluid guiding. The ureteral stent comprises an inner structure (200), and an outer structure (100) sleeved on the inner structure (200), wherein the outer structure (100) is a tube-shaped structure, and the outer structure (100) is made from a first wire (110). The ureteral stent can effectively reduce ureteral stent failure in fluid guiding.

This invention provides a magnetic grabbing forceps, which includes a magnetic ureteral stent and magnetic grabbing forceps. The magnetic grabbing forceps include a forceps body extending distally, a transmission mechanism connected to the forceps body, and a forceps head structure connected to the transmission mechanism. The forceps body drives the left and right clamps to switch between a closed and an open state through the transmission mechanism. The forceps head structure includes a forceps head base, a left and a right clamp rotatably connected to the forceps head base, and a second magnetic component connected to the forceps head base. After the jaws switch from a closed to an open state, the second magnetic component, under the rebound force of the elastic component, causes the second magnetic component to retract into the jaws.

The utility model relates to the technical field of medical instruments, in particular to a ureteral stent. Comprising a first fixing tube, a connecting tube and a second fixing tube which are sequentially communicated, the connecting tube comprises a connecting section and at least one supporting section, the supporting section is used for supporting a local narrow area in a ureter, the connecting section is made of a flexible material, and the strength of the supporting section is larger than that of the connecting section; wherein through holes are formed in the pipe wall of the first fixing pipe, the pipe wall of the connecting pipe and the pipe wall of the second fixing pipe, and the width of the first fixing pipe and the width of the second fixing pipe are larger than the pipe diameter of the connecting pipe. According to the ureteral stent, the supporting strength of the ureteral stent can be guaranteed, and the use experience feeling of a patient can be improved.

This invention relates to the field of ureteral stents, specifically to a ureteral stent with an active rupture function. It comprises a flexible tube extending axially and defining a central flow channel. The flexible tube includes an axial support ridge, an expansion actuator, a waterproof sheath, and a pre-embedded tear element. The axial support ridge is made of a medical polymer material. The expansion actuator, attached to the side of the axial support ridge, is made of a water-swellable gel material. The waterproof sheath circumferentially encloses the axial support ridge and the expansion actuator, isolating the expansion actuator from the external environment. The pre-embedded tear element is disposed inside the waterproof sheath or within its wall and extends axially along the flexible tube. This invention utilizes the pre-embedded tear element to disrupt the waterproof sheath. Urine activates the expansion actuator, which, upon absorbing water, generates a strong radial expansion force, rupturing the stone shell attached to the surface of the ureteral stent, thereby reducing frictional resistance and the risk of mechanical damage during removal.

1. The name of the design product: ureteral stent extractor. 2. The use of the design product: for extracting ureteral stent. 3. The design features of the design product: in shape. 4. The picture or photo that best shows the design features: perspective view 2.

The invention provides application of degradable shape memory polyurethane in preparation of a ureteral stent, and belongs to the technical field of polymer materials. The invention discloses a degradable ureteral stent based on shape memory polyurethane ISO2-PU, which has excellent shape memory function, mechanical property, degradation property, anti-crusting property and biological safety, and can effectively solve the problems of inconvenience in placement, insufficient mechanical property, non-degradation, easiness in crusting and the like in the prior art. Good application prospects are realized.

The utility model discloses a ureteral stent bladder end auxiliary device which comprises a metal ball and a hollow tubular channel, and the metal ball is provided with a through hole matched with the outer diameter of the hollow tubular channel. The front end of the hollow tubular channel extends into the through hole from the tail end of the metal ball and is fixed to the tail end of the metal ball through the degradable fixing layer, and the rear end of the hollow tubular channel is used for being connected with a ureter support. A non-absorbable suture is wound on the outer wall of the hollow tubular channel, the front end of the non-absorbable suture penetrates through the degradable fixing layer and then is connected with the tail end of the metal ball, and the rear end of the non-absorbable suture is used for being connected with a ureteral stent. By means of the ureteral stent taking device, the invasive operation of taking the ureteral stent through a traditional cystoscope can be avoided, the medical cost is reduced, the iatrogenic injury risk is reduced, and secondary anesthesia is further avoided for a patient needing anesthesia.

The invention relates to the technical field of antibacterial coating ureteral stents, and discloses an antibacterial coating ureteral stent which comprises a telescopic seepage mechanism, and fixing mechanisms are arranged at the two ends of the telescopic seepage mechanism. According to the antibacterial coating ureter stent and the implanting device thereof, through the telescopic seepage mechanism, the fixing mechanism, the guide wire mechanism and the pushing mechanism, elasticity can be formed through a scroll fixing end tube and a spring seepage tube during use, and it is guaranteed that when the body position of a patient changes or moves, elastic stretching and retracting of a ureter are self-adapted; and the end part of the end tube is stored through the multi-layer scroll structure of the scroll fixing end tube, so that the top end of the end tube is prevented from directly forming rigid contact with the renal pelvis and the bladder wall, and the comfort of a patient is improved.

The utility model relates to the technical field of medical instruments, and discloses a tail wire ureteral stent which comprises a main body mechanism and an accessory mechanism, the upper end of the main body mechanism is fixedly connected with a renal pelvis connecting mechanism, and the lower end of the main body mechanism is fixedly connected with a bladder connecting mechanism; the pelvis connecting mechanism comprises a pelvis connecting pipe, a first support is fixedly arranged at the upper end of the pelvis connecting pipe, the bladder connecting mechanism comprises a bladder connecting pipe, and an oblique incision is fixedly formed in the lower end of the bladder connecting pipe. According to the utility model, the double-polypropylene silk thread is used for replacing the far-end ureter stent, the urine passing ability in the middle of the far-end material of the ureter is changed, the backflow of the bladder ureter is reduced, the postoperative symptom of stent implantation is reduced, and the tail-end silk thread is used for replacing the far-end ureter stent, so that the length of the far-end ureter stent can be long or short and can be customized privately; and the overall application range of the device is enlarged, and the overall practicability of the device is improved.

A biomedical device includes a zinc-based material including a matrix including zinc, and nanostructures dispersed in the matrix. Embodiments of this disclosure are directed to zinc (Zn)-based materials including dispersed nanostructures for biomedical applications and devices, such as bioresorbable vascular stents, bioresorbable ureteral stents, endoluminal springs for distraction enterogenesis, biodegradable bone implants with tunable modulus, guided bone generation membranes, bioresorbable dental membranes, and other biomedical implants, as well as other functional applications, such as biodegradable electronics and sensors.

A guidewire for use with ureteral stents has an elongated shape with a proximal end and a distal end. The guidewire has indicia along the proximal end to indicate the length of the guidewire that was introduced into the patient. Based on the indicia or the visual inspection, a physician can select the appropriately sized stent to place in the patient.

The utility model discloses a medical anti-slip, convenient flushing, pressure measurable single 'J' tube, which comprises a single J tube annular part and a single J tube main body, the right end of the single J tube main body is provided with the single J tube annular part, the left end of the single J tube main body is provided with a single J tube side branch, the lower side of the single J tube side branch is provided with a drainage bag, and the drainage bag is provided with a drainage hole. The single J tube collateral branch is connected with the drainage bag through a collateral branch flushing sampling end, and is used for a patient subjected to ureteral skin stoma pelvis ureteral drainage after radical bladder resection, the postoperative ureteral stent can be better prevented from slipping, the postoperative ureteral stent can be conveniently flushed, necrotic tissues and foreign matters can be flushed out in time, flushing and pressure measurement are facilitated due to sufficient drainage, and the drainage effect is good. Risks of hydronephrosis and exuresis caused by blockage of the ureteral stent after the operation of a patient are reduced, sampling after the operation is convenient, the condition of intrarenal pressure of the patient is known in time, and the problems that the ureteral stent slips easily and is difficult to wash in the perioperative period are solved.

The present invention relates to a medical device (100) for use as a ureteral stent, a biliary stent or a urinary catheter in a human or animal body. The medical device (100) comprises a hollow device body (101) having at least one body lumen (102), an inner body surface (105) and an outer body surface (106), wherein the inner body surface (105) delimits the at least one body lumen (102). The medical device (100) further comprises at least one array (110) of microstructures (111) located on the inner body surface (105) and / or the outer body surface (106) and configured to locally increase fluid-induced shear stress acting on the device body (101) in use of the medical device (100) in response to applying an acoustic field to the medical device (100). The invention further relates to a medical system comprising such as a medical device and an activation device configured to be positioned externally of a human or animal body, wherein the activation device comprises at least one sound transducer configured to generate an acoustic field for application from externally of the human or animal body to the medical device. The invention further relates to as to a method of acoustically activating such a medical device during use in a human or animal body, in particular for cleaning purposes and / or mass transport.

Embodiments pertain to ureteral stents for treatment of partial or full ureteral occlusion by bridging one or more ureteral occlusions, where each stent includes a tubular portion, a first spout portion and a second spout portion. The stent may have one or more tapered edges by having the smallest diameter of the first and / or the second spout portion smaller than the largest diameter of the tubular portion, and / or be of an overall length allowing the ureteral stent to be completely located within a patient's ureter once deployed therein.

The utility model discloses an anti-reflux ureteral stent, which belongs to the technical field of ureteral stents and comprises a stent pelvis section, a stent ureteral section and a stent bladder section. At least one hollow expansion part is arranged on the tube wall of the bladder section of the stent, and an integrated anti-reflux valve is arranged in a tube cavity of the expansion part. The valve is composed of a plurality of valve-shaped structures, the free ends of the valve-shaped structures can be close to each other to seal a lumen when subjected to retrograde liquid pressure from the bladder to the kidney, the free ends of the valve-shaped structures are separated from each other to open the lumen when subjected to forward liquid pressure from the kidney to the bladder, and therefore one-way drainage of urine is achieved. The anti-backflow urine bag is simple in structure and capable of effectively preventing backflow of urine and complications such as lumbago and hydronephrosis caused by backflow of urine. Meanwhile, due to the structure of the expansion part, the valve can be completely attached to the wall when opened, and operation smoothness and safety are guaranteed when a guide wire is placed in.

The invention provides an anti-reflux ureteral stent, and relates to the technical field of medical instruments. The anti-reflux ureteral stent comprises a main tube, a first composition part and a second composition part, wherein the first composition part and the second composition part are arranged at the two ends of the main tube; the main pipe is internally provided with a flow choking device for preventing urine from flowing backwards; the flow choking device comprises a containing pipe and an elastic bag; the outer diameter of the containing pipe is smaller than the inner diameter of the main pipe. A capillary core is arranged in the containing pipe and used for draining part of urine flowing back into the main pipe from the second composition part into the elastic bag through the capillary action, so that the elastic bag is deformed; the elastic bag is used for separating the main pipe when the maximum radial size of the elastic bag reaches the preset size. According to the anti-reflux ureteral stent, the effect of actively preventing reflux of urine is achieved by utilizing the capillary phenomenon.

The invention relates to medical equipment, in particular to a ureteral stent tube with a spherical bladder section (3). The technical problems that a traditional double-pigtail ureter support pipe needs to be placed under direct vision, bladder stimulation is obvious, and no anti-reflux structure exists are solved. The bladder section (3) of the ureteral stent tube is designed to be in a sphere-like shape, the function of a limiting head can be achieved, the ureteral stent tube can be placed in place without endoscope monitoring, stimulation of a thin tubular structure to the bladder can be avoided, and meanwhile the interior of the sphere-like structure can provide enough space for containing an anti-reflux one-way valve (6). Comprising a renal pelvis section (1), a ureter section (2) and a bladder section (3), the renal pelvis section (1) is in a bent tube shape, the ureter section (2) is in a straight tube shape, the bladder section (3) is of a sphere-like structure, the sphere-like structure of the bladder section (3) comprises a round ball, a flat ball, a hemisphere, a heart shape, a concave core ball and the like, the ureter section (2) is directly connected with the bladder section (3), and drainage holes can be formed in the wall of the sphere-like structure of the bladder section (3). And structures such as an anti-reflux one-way valve (6) can be arranged inside.

The invention relates to the technical field of ureteral stents, in particular to a thermo-sensitive bio-absorbable ureteral stent and a preparation method of a drug sustained-release coating thereof.The thermo-sensitive bio-absorbable ureteral stent comprises two polylactic acid anchoring rings, a longitudinal reinforcing radial line, a transverse response radial line, a threaded guide groove and a thermo-sensitive adhesive sheet, a longitudinal reinforcing radial line is annularly arranged between the two polylactic acid anchoring rings, a transverse response radial line is arranged outside the longitudinal reinforcing radial line, and the longitudinal reinforcing radial line and the transverse response radial line form a spiral stent structure. According to the thermo-sensitive bio-absorbable ureteral stent and the preparation method of the drug sustained-release coating thereof, by adjusting the lactide / glycolide ratio in PLGA to be 3: 1 and adding magnesium ion sustained-release particles, an acidic degradation environment is dynamically neutralized, synchronous degradation of a matrix and the coating is ensured, the support failure or inflammation risk is avoided, and sustained release of drugs in the support period of the stent is ensured.

The application discloses an anti-fouling and anti-protein adhesion ureteral stent and a preparation method thereof, and relates to the technical field of medical devices.The application comprises a braided layer used as a support framework; a bionic structure layer connected to the inner layer of the braided tube for preventing protein adhesion and biofilm formation; and a silk fibroin microneedle layer connected to the outer layer of the braided tube for carrying anti-stenosis drugs.The rough texture formed by the dermal denticles on the surface of the bionic anti-fouling and anti-protein adhesion silk fibroin film on the inner surface of the ureteral stent can reduce the adhesion area of organisms inside the ureteral stent and keep the surface clean; the lotus leaf surface is covered with randomly distributed protrusions with a size of about 10 microns, and has super-hydrophobic and self-cleaning functions; and the bionic surfaces all have the function of effectively preventing protein adhesion and biofilm formation.

A passive stent removal device, system and method using a series of capturing steps to grasp a stent smoothly and consistently for removal.