14 results about "Stent placement" patented technology

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.

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.

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.

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.

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.

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.

Disclosed is an easy-to-manipulate stent delivery system which facilitates the movement or fixation of an electrocautery tip in adjacent tissue layers, specifically between two adjacent inner cavities in the body, and enables simple deployment of a stent to connect holes of the two adjacent inner cavities created by the electrocautery tip. A first handle, which moves an electrocautery tip, is moved or fixed in a fixed tube by a first locking member which operates semi-automatically. A second handle, which moves an outer tube for deployment of a stent, is moved or fixed on a guide rod of the first handle by a second locking member which is operated by an external pulling force.

This invention discloses an adaptive dilatation ureteral stent that reduces irritation. The stent utilizes an inflatable balloon to progressively dilate the ureteral stenosis, and inhalation causes the balloon to contract, facilitating angiography to observe the degree of stenosis retraction. This design better meets the individual dilatation needs of patients and reduces the risk of needing a second stent placement due to stenosis retraction. The stent is characterized by comprising a main body and an inflation device. The main body consists of a renal involute, an inlet port, a supporting connecting tube, a bladder involute, and an outlet port. The other end of the renal involute is positioned at and connected to one end of the supporting connecting tube. The inlet port is located on the side of the renal involute. The bladder involute is a closed-end arc-shaped structure, with the other end positioned at and connected to the other end of the supporting connecting tube.

Disclosed is an easy-to-manipulate stent delivery system which facilitates the movement or fixation of an electrocautery tip in adjacent tissue layers, specifically between two adjacent inner cavities in the body, and enables simple deployment of a stent to connect holes of the two adjacent inner cavities created by the electrocautery tip. A first handle, which moves an electrocautery tip, is moved or fixed in a fixed tube by a first locking member which operates semi-automatically. A second handle, which moves an outer tube for deployment of a stent, is moved or fixed on a guide rod of the first handle by a second locking member which is operated by an external pulling force.