12 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 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.

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.

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.

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.

This utility model relates to the field of medical devices, specifically to a ureteral stent capable of carrying particles, comprising: a tube body and a particle chamber structure; the front and rear ends of the tube body are curved into a pigtail shape; the tube body is a single through-hole serving as a drainage cavity; several drainage holes are provided on the curved portions of the front and rear ends of the tube body; a marker ring is provided on the tube body at the junction of the curved portion and the tube body; several radiopaque rings are provided on the tube body between two marker rings; the particle chamber structure is integrally formed with the tube body, and the particle chamber structure includes several particle chambers distributed laterally along the tube body. Each particle chamber is a cylindrical cavity, with one end of the cylindrical cavity serving as a particle placement channel. The entrance to the particle placement channel is sloped, and the bottom of the slope is a baffle to prevent the radioactive particles from slipping out. The cylindrical cavity is filled with radioactive particles. This utility model combines a ureteral stent with radioactive particles, and uses a single particle chamber with several particle chambers arranged laterally, making it simple to operate and convenient to use.

The application belongs to the technical field of medical devices and provides a magnetic induction object taking device, which comprises a tube pulling system host, a tube puller body connected to the tube pulling system host through a data line, a handle, a luer joint, a tube body and a sensor magnetic head, the tube body and the luer joint are both installed on the handle, the sensor magnetic head is installed on one end of the tube body and is used for sucking out the ureteral stent out of the body through the sensor magnetic head, the sensor magnetic head is arranged in a bent manner, and a sterilization box for sterilizing and disinfecting the tube puller body is installed at the bottom of the tube pulling system host. The magnetic induction object taking device provided by the scheme can adjust the direction of the pipe elbow by rotating the tube puller handle, the screen of the tube pulling system host displays whether the tube puller body pipe tip adsorbs the ureteral stent, and the doctor can complete the operation directly and intuitively.

The utility model provides a kind of ureteral stent, in the ureteral stent, the first drainage hole is equipped on the pipe wall of ureteral stent pipe;The anti-sliding stent pipe is arranged at the first end of the ureteral stent pipe, the second drainage hole is equipped on the anti-sliding stent pipe;The anti-reflux membrane is arranged at the second end of the ureteral stent pipe, the positioning ball is arranged on the part of the ureteral stent pipe close to the anti-reflux membrane, for the anti-reflux membrane is positioned.The ureteral stent in the utility model is compared with the existing ureteral stent, and the structure design is ingenious to increase function, has anti-reflux design and the design of anti-reflux is positioned, when using, the tail of ureteral stent, i.e. the second end of ureteral stent will not be vertical in bladder, avoid to cause irritation to patient bladder neck, patient has foreign body sensation condition to occur, improve equipment use comfort, satisfy patient use demand.

To overcome the problems of poor lubrication and easy transport of exogenous contaminants during ureteral stent placement in the human body, the present invention provides a ureteral stent and its preparation method. The ureteral stent includes a stent body and a lubricating and antibacterial coating. The lubricating and antibacterial coating includes a hydrophilic copolymer, an antibacterial agent, and a catalyst. The hydrophilic copolymer includes component A and component B. Component A includes a cross-linked ionic liquid of a high molecular weight polymer, and component B includes a 2-(dimethylamino)methacrylate-maleate-acrylamide copolymer. The ureteral stent provided by the present invention can play a good lubricating role, reducing the frictional resistance of the stent body. The polymerization reaction of component A and component B forms a hydrophilic copolymer with a gel network structure. This hydrophilic copolymer is cross-linked with the antibacterial agent to form a lubricating and antibacterial coating with an antibacterial gel network structure. The formed lubricating and antibacterial coating has good deformation resistance and mechanical properties, and can prevent the adhesion of impurities such as cell clusters, anion and cation clusters, and bacteria / fungi to the ureteral stent, avoiding urinary tract infections caused by stent placement.

The present disclosure relates to obtaining Foley catheters and double-J catheters that exhibit antibacterial properties and prevent stone formation by means of coating the surfaces of urinary catheters used in the healthcare sector with multiple film layers comprising groups containing gallic acid so as to impart antibacterial properties and stone-formation-preventing effectiveness. It is intended in particular to prevent the ascending transmission of bacteria from the female or male genital region to the bladder with the aid of the catheter during urethral catheter insertion, as well as stone formation due to stasis arising from the slowing of flow and turbulent flow associated with ureteral stents inserted in cases of stricture. It is also intended to prevent the occurrence of damage that may form in the urinary tract due to oxidative stress and inflammation triggered either by infection in the surrounding tissues or by mechanical pressure caused by the stone. Effectiveness is achieved by coating the surfaces of the catheters / stents applied to the urinary tract with film layers of gallic acid, which is effective in all the aforementioned adverse conditions in preventing stone formation and is effective against infectious agents, and which has antioxidant and anti-inflammatory effects.

The utility model relates to medical instrument technical field, concretely relates to a ureteral stent pipe urine collecting bag in operation, including bag body and pull cord, the bag body top wall is set up with the passage hole, the passage hole is outward flanging and forms the rope channel of open type ring, and the rope channel can draw the pull cord and insert, the bottom wall of bag body is set up with the drain pipe, is provided with the plugging piece for on the drain pipe on-off, this urine collecting bag provides two kinds of connection mode, that is to say, draw the pull cord and bind and spring pig nose buckle and tighten, increase the flexibility and reliability of use. Under different operation scene and demand, medical staff can select suitable connection mode according to actual condition.

The application discloses a visual urethral bougie. The bougie comprises an operation part, a head part shell provided with a camera, and a connecting pipe connecting the operation part and the head part shell. The head part shell comprises an inner shell and an outer shell. The inner shell is provided with the camera, a light source lamp and a cleaning module. The cleaning module comprises a flushing module and a wiping module, and can flush and reciprocally wipe the camera, so that the visual field is ensured to be clear. The outer shell is provided with a clamping and pushing module. The clamping and pushing module comprises a pushing control ring and a rotating control ring which are slidably connected to a center slide rod. The pushing control ring drives a sliding block to move forward through a gear and rack mechanism, so that a clamping plate is extended. The rotating control ring drives the clamping plate to rotate inwardly through a pulling rope, so that stable clamping of a ureteral stent is realized. Through the visual guidance and the stable clamping and pushing mechanism, the problems that the urethra inside cannot be observed in real time and the pushing is easy to slip in the prior art are solved, and the operation success rate and safety are improved.