38 results about "Stent placement" patented technology

The invention provides a prostate stent conveying system. The prostate stent conveying system comprises a prostate stent, a tube body, a first liquid channel, a second liquid channel, a limiting assembly and an indicating assembly. The limiting assembly comprises a slender component, the slender component can be movably arranged in the tube cavity in a penetrating mode in the axial direction, the slender component can be switched between a limiting state and an unlocking state through axial movement of the slender component, and when the slender component is in the limiting state, the far end of the slender component extends out of the tube body and locks the prostate stent on the tube body; when the long and thin component is in the unlocking state, the far end of the long and thin component retracts into the tube body to allow the prostate stent to be released at the target position, and the indicating assembly is arranged on the tube body and used for indicating the placement position of the prostate stent.

In an exemplary example, methods and systems are disclosed herein for treating vascular disease by implanting a stent within a vessel and using intravascular imaging to determine and ensure that the stent is properly implanted and produces the desired and effective results. For example, a system can obtain optical shape sensing data and intravascular imaging data of a vessel. The system can process the optical shape sensing data and the intravascular imaging data to generate three-dimensional models and images of the vessel immediately before and after the stent is implanted in the vessel and make an exact comparison of the before and after images to ensure that the stent is properly implanted and will produce or is producing the desired and effective results. The exact comparison can be based on a derived diameter associated with the location of the stent placement in the vessel, which is based on the generated pre- and post- three-dimensional models.

The utility model relates to a tracheal stent pusher which comprises a restraining assembly, a pushing assembly and a pushing assembly, the restraining assembly comprises a long-strip-shaped rope cage and a traction rope arranged at one end of the rope cage in a connected mode, and the rope cage is used for folding and restraining a tracheal stent; the two ends of the containing pipe are communicated, a deformable guide wire is arranged in the length direction of the containing pipe so that the containing pipe can be bent and shaped, and the rope cage is arranged in the containing pipe in a sliding mode; the pushing pipe is arranged in the placing pipe in a sliding manner and is used for ejecting the rope cage filled with the air pipe bracket out of the placing pipe; the two ends of the pushing pipe are communicated, a wire passing opening is formed in one side of the pushing pipe, and the traction rope penetrates in from the end of the pushing pipe and penetrates out from the wire passing opening. A through biopsy hole is formed in the fiberoptic bronchoscope, the free end of the fiberoptic bronchoscope can penetrate through the pushing pipe and the rope cage in a sliding mode, and the biopsy hole is used for inserting a cutting tool to damage connection of the end, away from the pushing pipe, of the rope cage. The utility model provides a tracheal stent pusher which is simple to operate and high in fault tolerance.

This application provides a stent placement device for cardiac surgery, comprising a cannula with an inlet end and an outlet end; the cannula is divided into 2-3 cannula branches at the inlet end; the cannula accommodates 2-3 stent delivery catheters; one stent delivery catheter is inserted from each cannula branch; all stent delivery catheters exit from the cannula outlet end; each stent delivery catheter has a guidewire lumen and a stent balloon pressure chamber; a guidewire is disposed in the guidewire lumen; a stent implanter is disposed at the tip of the stent delivery catheter, and an ultrasound positioning ball is sequentially disposed at the tip of the stent delivery catheter. This application utilizes a structure consisting of a flexible cannula and multiple stent delivery catheters to conveniently and simultaneously provide precise stent implantation for multiple blood vessels; by incorporating an ultrasound positioning ball with a corner reflector to enhance ultrasound reflection, the implantation and detailed operation of the device can be more easily completed under ultrasound monitoring.

The invention discloses a preparation method of an intestinal canal filling temperature-sensitive gel injection for gastrointestinal anastomosis guided by an ultrasonic endoscope, and belongs to the technical field of regenerative medicine. According to the specific method, poloxamer, chitosan, polycarbophil, polyvinylpyrrolidone, iohexol and methylene blue are utilized to construct the novel intestinal canal filling temperature-sensitive gel injection. The injection can be injected into the anastomotic intestinal segment of the small intestine by using a conventional nasobiliary drainage tube which is clinically used at present, and the injection becomes viscous immediately under the action of the pH value of the small intestine after injection, so that the injection is inhibited from spreading all around. Meanwhile, the injection is quickly converted into high-strength hydrogel under the action of body temperature, and the hydrogel is adhered to small intestine mucosa to inhibit gel sliding. Therefore, the injection can form a section of gel on a target small intestine section, local immobilization filling and supporting of the target small intestine section are achieved, development can be achieved, the operation difficulty of intestinal tube puncture and stent placement in gastrointestinal anastomosis guided by an ultrasonic endoscope can be greatly reduced, the operation efficiency and the success rate are improved, and the operation cost is reduced. The dosage is less than that of normal saline which is conventionally used clinically, and the effect is better. Moreover, the gel temperature can be reduced by injecting low-temperature normal saline after the operation, so that the gel is thoroughly dissolved into a solution and discharged out of the body, and the phenomenon that the gel remains in the intestinal canal after the operation to cause obstruction is avoided. Therefore, the novel intestinal canal filling temperature-sensitive gel injection has very important clinical practical application value for gastrointestinal anastomosis guided by an ultrasonic endoscope.

A system for treating an intracranial atherosclerotic stenosis in an intracranial blood vessel includes an intracranial stent having a central portion disposed between a proximal portion and a distal portion of the stent, the central portion having a smaller diameter than a diameter of the proximal portion and smaller than a diameter of the distal portion when the stent is in an expanded configuration. The system includes a guiding apparatus having a guidance region, the guidance region having a first radiopaque region, a second radiopaque region, and a radiolucent region. The first radiopaque region and the second radiopaque region are separated by the radiolucent region, and, when the stent is placed on the guidance region, the proximal portion of the stent overlies the first radiopaque region, the central portion of the intracranial stent overlies the radiolucent region, and the distal portion of the intracranial stent overlies the second radiopaque region.

A system for treating an intracranial atherosclerotic stenosis in an intracranial blood vessel includes an intracranial stent having a central portion disposed between a proximal portion and a distal portion of the stent, the central portion having a smaller diameter than a diameter of the proximal portion and smaller than a diameter of the distal portion when the stent is in an expanded configuration. The system includes a guiding apparatus having a guidance region, the guidance region having a first radiopaque region, a second radiopaque region, and a radiolucent region. The first radiopaque region and the second radiopaque region are separated by the radiolucent region, and, when the stent is placed on the guidance region, the proximal portion of the stent overlies the first radiopaque region, the central portion of the intracranial stent overlies the radiolucent region, and the distal portion of the intracranial stent overlies the second radiopaque region.

The present invention provides an easy-to-operate stent delivery system that allows for easy movement or fixation of the electrocautery tip in adjacent tissue layers, i.e., two adjacent lumens within the body, and allows for easy deployment of the stent to connect the holes in the two adjacent lumens formed by the electrocautery tip. [Solution] The stent delivery system according to the present invention is characterized in that a first handle for moving the electrocautery tip is moved or fixed in a fixed tube by a first locking member that operates semi-automatically, and a second handle for moving the outer tube for stent deployment is moved or fixed in a guide rod of the first handle by a second locking member that is actuated by a pulling external force.

This invention discloses a dynamic prediction system for long-term adverse cardiovascular event risk after stent implantation, belonging to the field of personal health risk assessment technology. It includes: a cardiovascular assessment module for determining the target cardiovascular adverse event presentation coefficient based on the target patient's first chest pain rating and real-time heart rate after stent implantation; a cardiac function assessment module for determining the emphasis of cardiac function analysis at each stage based on the target patient's physical examination data after stent implantation; a probability determination module for determining the probability of the first adverse event based on the target cardiovascular adverse event presentation coefficient and the emphasis of each cardiac function analysis; and an indicator determination module for comparing the target patient's first adverse event probability with the second adverse event probability of each monitored patient to obtain the target cardiovascular risk warning indicator for the target patient. This invention can improve the accuracy of long-term risk prediction for adverse cardiovascular events.

The invention discloses a cardiovascular intervention catheter device, and belongs to the technical field of medical auxiliary instruments, the cardiovascular intervention catheter device comprises a catheter and a guide wire, a plurality of position limiting structures are arranged in the catheter at equal intervals, and the position limiting structures can rotate in the catheter; the guide wire is located in the catheter and slides on a plurality of position limiting structures, a sheathing canal and a mounting round frame are arranged at the end of the catheter, a guide wire moving structure for driving the guide wire to move is arranged on the mounting round frame, and the guide wire moving structure is in sliding fit with the mounting round frame. And a movable adjusting structure is arranged on the mounting circular frame. When interventional therapy is carried out, the guide wire slides on the multiple position limiting structures in the catheter, it is guaranteed that the guide wire does not shake when moving, it is guaranteed that the guide wire moves stably, a doctor can guide the guide wire to a target position more accurately, an accurate path is provided for follow-up treatment operation such as stent placement and embolism, and the treatment efficiency is improved. Therefore, the treatment effect is improved.

To provide a stent carrying device capable of more surely indwelling a stent in a desired part.SOLUTION: The stent transfer device 100 includes the elongated inner sheath 20 to which the stent 200 is attached in an externally mounted state, the inner sheath 20 includes the sheath main portion 41 and the individual sheath portion 43 in which the first sheath 45 and the second sheath 47 are separated from each other, and the stent 200 is configured such that the first sheath 45 of the individual sheath portion 43 is inserted through the first branch tube 220. The inner sheath 20 is attached in a state in which the second sheath 47 of the individual sheath portion 43 is inserted through the second branch tube 230, the first radiopaque marker 51 is provided in the first sheath 45 of the individual sheath portion 43 at a position corresponding to the stent branch portion 211, and the second radiopaque marker 52 is provided in the second sheath 47 of the individual sheath portion 43 at a position corresponding to the stent branch portion 211.SELECTED DRAWING: Figure 2

The present application relates to the technical field of medical devices, in particular to an esophageal fistula occlusion stent and an esophageal fistula occlusion stent placement device. The esophageal fistula occlusion stent comprises a stent body, the two ends of the stent body in the axial direction are respectively provided with a first anti-falling part, the first anti-falling part is arranged around the stent body, extends along the radial direction of the stent body and is attached to the inner side wall of the esophagus, a first attachment surface for attaching to the esophageal wall is arranged around the first anti-falling part, and a first groove is arranged on the first attachment surface; a second anti-falling part is arranged on the outer circumferential surface of the middle part of the stent body, the second anti-falling part is arranged around the stent body in the direction away from the esophageal fistula, extends along the radial direction of the stent body and is attached to the inner side wall of the esophagus, a second attachment surface is arranged at the attachment position of the second anti-falling part and the inner side wall of the esophagus, and a second groove is arranged on the second attachment surface. In this way, the problem that the esophageal fistula occlusion stent is easy to fall off from the fixed position is solved.

Medical systems for positioning a stent along a tissue pathway are disclosed. A system includes an inner shaft having a lumen, a proximal end coupled to the handle and a distal end coupled to a tip member. The system also includes an outer shaft having a proximal end region and a lumen, wherein at least a portion of the inner shaft extends within the lumen of the outer shaft. The system also includes a stent positioned between an inner surface of the outer shaft and an outer surface of the inner shaft. Further, the tip member includes a first engagement member configured to engage and anchor the tip member to a tissue of the tissue pathway before the stent engages the tissue pathway.

This invention provides apparatus, methods, and kits that allow for simplified stent placement and retention in biological tubes other than blood vessels, particularly in antegrade biliary stent placement. The apparatus and methods advantageously allow for shorter imaging and stent placement times and significantly improve stent tolerance and / or retention in the tube. In a further advantageous aspect, the envisioned stent forms a complex fluid path to facilitate drainage of the tube. Furthermore, the apparatus and methods proposed herein reduce or even completely eliminate partial contraction of the peritoneal space during imaging and stent placement, and thus prevent operator exposure to exhaust gases carrying harmful agents.

Devices, methods, and kits are presented that allow for simplified stent placement and stent retention in a biological vessel other than a blood vessel, and especially biliary stent placement in an antegrade manner. The devices and methods advantageously allow for shortened imaging and stent placement time, and substantially improve tolerability and / or retention of the stent in the vessel, and in further beneficial aspects, contemplated stents form a composite fluid path to facilitate drainage of the vessel. Still further, the devices and methods presented herein reduce or even entirely eliminate partial deflation of the peritoneal space during imaging and stent placement and so prevent exposure of operating personnel to vented gases carrying harmful agents.

The invention provides a vertebral artery stent. The vertebral artery stent is characterized by comprising a stent body, a blocking balloon assembly and a supporting balloon assembly; wherein the plugging balloon assembly comprises a plugging balloon and a plugging catheter which are connected with each other; a balloon body of the plugging balloon is arranged at the front end of the stent body, and the plugging catheter penetrates through the whole stent body and extends out of the rear end of the stent body; the supporting balloon assembly comprises a supporting balloon and a supporting catheter which are connected with each other; a balloon body of the supporting balloon is arranged in the stent body, and the supporting catheter extends out of the rear end of the stent body. The stent can effectively solve the problem of plaque flow guide in the stent implantation process.

The utility model discloses a ball dilation covered stent for major iliac artery occlusion, and relates to the technical field of medical instruments, the ball dilation covered stent for major iliac artery occlusion comprises a stent structure and a dilation air bag, the stent structure comprises a main channel and two branch channels, the two branch channels are D-shaped and are connected with one end of the main channel; the surface of the expansion air bag is movably connected with the inner side walls of the main channel and the two branch channels; the surface of the expansion air bag is fixedly connected with an anti-disengagement ring, and the surface of the anti-disengagement ring is connected with the end, away from the main channel, of the branch channel, so that the problem that when an existing ball expansion type stent is placed, the stent can be inconveniently and effectively placed in the main iliac artery due to friction between the stent and a blood vessel is solved; and meanwhile, the expansion air bag is inconvenient to take out.

The application discloses a gastric weight loss device for releasing a stent by using an endoscope transparent cap, which comprises an endoscope transparent cap and a stent component; the endoscope transparent cap comprises an endoscope joint, a sliding sleeve, a guide pipe and a driving component; the endoscope joint is used for sleeving a distal end of an endoscope, a sliding ring in the sliding sleeve is arranged on the endoscope joint, and the stent component is compressed on the outside of the endoscope joint and the inside of the sliding sleeve; the guide pipe is arranged on the peripheral wall of the endoscope, the driving component is arranged on the proximal end of the endoscope, and the endoscope joint is connected through the guide pipe and the driving component; the sliding ring is transmissionally connected through a first driving tendon and the driving component; the driving component is configured to drive the sliding ring to move towards the proximal end by pulling the first driving tendon, so as to expose the stent component, and drive the sliding ring to move towards the distal end by pushing the first driving tendon, so as to push away the stent component. When the device is applied, the operation is relatively simple and convenient, the efficiency of stent placement can be greatly improved, and the time of stent placement surgery can be shortened.

Administration of receptor antagonists, inverse agonists, allosteric modulators or signaling specific inhibitors of cannabinoid receptor 1 (CB1) prevents and treats conditions and complications in patients, including conditions and complications associated with treatment of various cardiovascular diseases. Patients with the history of use of cannabis have the risk of severe complications. Administration of inhibitors or modulators of CB1 during perioperative, intraoperative and / or postoperative periods results in an improvement in the outcome of a patient for methods involving the treatment of cardiovascular diseases, such as percutaneous coronary intervention, coronary artery bypass surgery or stenting.

The invention discloses an intragastric weight losing device using an endoscope transparent cap to release a support. The intragastric weight losing device comprises the endoscope transparent cap and a support component. The endoscope transparent cap comprises an endoscope joint, a sliding sleeve, a guide pipe and a driving part; the endoscope connector is used for being connected with the far end of an endoscope in a sleeved mode, the sliding ring in the sliding sleeve is arranged on the endoscope connector in a sleeved mode, and the support component is compressed on the outer side of the endoscope connector and the inner side of the sliding sleeve. The guide pipe is arranged on the peripheral wall of the endoscope, the driving part is arranged at the near end of the endoscope, and the endoscope connector is connected with the driving part through the guide pipe; the sliding ring is in transmission connection with the driving part through the first driving tendon; the driving component is configured to drive the sliding ring to move towards the near end by pulling the first driving tendon so as to expose the stent component, and can drive the sliding ring to move towards the far end by pushing the first driving tendon so as to push away from the stent component. When the device is applied, the operation is simpler and more convenient, the stent implantation efficiency can be improved to a greater extent, and the stent implantation operation time is shortened.

This invention relates to an anesthesia robot based on IoT big data for automatic drug delivery. It includes a base, a support, a placement platform, a main controller, a display screen, a placement backplate, a tubing rack, multiple delivery tubing lines, and multiple drug delivery units. Each drug delivery unit includes a pushing component, a mounting component, and a placement frame. The placement frame is snapped into place with the mounting component. First, a spare placement frame containing an anesthetic syringe is fixed to the placement backplate. During surgery, the main controller simply controls the output end of the corresponding pushing component to move away from the push rod of the anesthetic syringe, removing the corresponding placement frame from the mounting component. Then, the spare placement frame containing the anesthetic syringe is placed on the placement backplate, thus completing the replacement of the anesthetic syringe. The operation is simple and the replacement efficiency is fast.

Medical device systems are disclosed. A system for positioning a stent within a tissue pathway includes a handle, an inner shaft having a lumen, a proximal end coupled to the handle and a distal end coupled to a tip member. The system also includes an outer shaft having a proximal end region and a lumen, wherein at least a portion of the inner shaft extends within the lumen of the outer shaft. The system also includes a grip member coupled to the outer shaft, a stent positioned between an inner surface of the outer shaft and an outer surface of the inner shaft, an electrically conductive element coupled to the tip member, an electrical wire coupled to the handle and the electrically conductive element and a cannula assembly configured to be positioned within the lumen of the inner shaft, the cannula assembly including an electrode and an insulation member.

The utility model relates to sample processing equipment, belongs to the technical field of sample processing equipment, in particular to equipment for processing endocrine blood samples, which comprises a bottom plate and a placing bin, a support is fixedly connected to the upper surface of the bottom plate, a connecting plate is fixedly connected to one side of the placing bin, and one side of the placing bin is rotatably connected with one side of a connecting frame. A shaking plate is further included, one side of the shaking plate is rotationally connected with one side of the containing bin through a connecting shaft, and teeth are arranged at the bottom end of the shaking plate; the lower surface of the driving rack is in sliding connection with the upper surface of the bottom plate, and the driving rack is meshed with the bottom end of the shaking plate; a plurality of placing holes used for placing sample test tubes are formed in the placing bin, and the fixing parts are partially located in the placing holes; according to the utility model, more efficient batch mixing operation can be carried out on sample blood and an anticoagulant, the pretreatment time is saved, the treatment efficiency is improved, and the problem of low batch mixing treatment efficiency of the existing blood sample in the pretreatment stage is solved.

The utility model provides a kind of ureteral stricture support, belong to ureteral stricture support technical field, including ureteral stricture support, folding unfolding and quick installation dismantling component and protection reinforcing component, folding unfolding and quick installation dismantling component include the magnetic pole being set in the inside of several arc plates, ureteral stricture support is made of nickel titanium memory alloy, ureteral stricture support is spiral corrugated, the utility model has beneficial effect: by the nickel titanium memory alloy of being provided, it is convenient to use personnel when using, by placing ureteral stricture support in temperature is twenty-five degrees below, realizes superelasticity using nickel titanium memory alloy, use personnel cooperates with spiral corrugated, and then realizes ureteral stricture support folding compression, when using, use personnel can install it in patient body, contact body temperature, ureteral stricture support will hair shape memory effect, restore preset spiral corrugated, to support.

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.

A method for treating an intestine with an expandable scaffolding expanded within the intestine. After placing the expandable scaffolding at a target location, such as across a fistula, the first and second end portions of the expandable scaffolding are radially expanded such that the first and second end portions contact an inner surface of the intestine on opposing sides of the fistula, anchoring the first and second end portions to the intestine. Radially expanding the first and second end portions foreshortens the medial portion along the longitudinal axis such that the first and second end portions are drawn closer together along the longitudinal axis as the medial portion foreshortens to close the fistula.

The invention provides a subclavian artery stent. The subclavian artery stent is characterized by comprising a stent body, a pipeline balloon assembly and a supporting balloon assembly; wherein the pipeline balloon assembly comprises a pipeline balloon and a pipeline balloon catheter which are connected with each other; a balloon body of the pipeline balloon is arranged at the front end of the stent body, and a pipeline balloon catheter extends out of the rear end of the stent body; the pipeline balloon is provided with a channel through which fluid can pass; the supporting balloon assembly comprises a supporting balloon and a supporting balloon catheter which are connected with each other; a balloon body of the supporting balloon is arranged in the stent body, and a supporting balloon catheter extends out of the rear end of the stent body. In the using process of the subclavian artery stent, the bypass vertebral artery is temporarily blocked, a fluid channel is reserved, dirt blocking objects directly flow out of the channel, and the risk caused by the subclavian artery stent placement operation is greatly reduced.

Medical device systems are disclosed. A system for positioning a stent within a tissue pathway includes a handle, an inner shaft having a lumen, a proximal end coupled to the handle and a distal end coupled to a tip member. The system also includes an outer shaft having a proximal end region and a lumen, wherein at least a portion of the inner shaft extends within the lumen of the outer shaft. The system also includes a grip member coupled to the outer shaft, a stent positioned between an inner surface of the outer shaft and an outer surface of the inner shaft, an electrically conductive element coupled to the tip member, an electrical wire coupled to the handle and the electrically conductive element and a cannula assembly configured to be positioned within the lumen of the inner shaft, the cannula assembly including an electrode and an insulation member.

This application provides a tandem thrombectomy device, relating to the technical field of cardiovascular medical devices, comprising a plurality of thrombectomy stents connected in series. Each thrombectomy stent includes a cutting segment and a braided segment. The cutting segment is used to cut the thrombus, and the braided segment is used to collect the cut thrombus. At least one cutting segment has a portion of its structure composed of several expansion units, and this portion of the cutting segment is configured to expand radially outward when under tension. By setting thrombectomy stents connected in series, the uneven deformation between each thrombectomy stent compensates for any missed points during thrombectomy, enabling multiple thrombectomies to be completed in a single placement, improving thrombectomy efficiency and reducing the risk of thrombus dislodgement and infection. The unique expansion structure design allows the cutting segment to expand outward under tension, resulting in a tighter fit between the cutting segment and the vessel wall, more thoroughly scraping the thrombus, reducing the number of stent placements, and further reducing the risk of thrombus dislodgement and infection.

Devices, methods, and kits are presented that allow for simplified stent placement and stent retention in a biological vessel other than a blood vessel, and especially biliary stent placement in an antegrade manner. The devices and methods advantageously allow for shortened imaging and stent placement time, and substantially improve tolerability and / or retention of the stent in the vessel, and in further beneficial aspects, contemplated stents form a composite fluid path to facilitate drainage of the vessel. Still further, the devices and methods presented herein reduce or even entirely eliminate partial deflation of the peritoneal space during imaging and stent placement and so prevent exposure of operating personnel to vented gases carrying harmful agents.