13 results about "Total occlusion" patented technology

A catheter for centrally crossing an occluded blood vessel includes a catheter body having a distal end, a proximal end, and a central passage. A rotatable drive shaft extending through the central passage and has a distal end, a proximal end, and a central lumen. A cutting tip is mounted on the distal end of the rotatable drive shaft and configured to cut through occlusive material when rotated. A plurality of spiral or other flat springs is disposed circumferentially about a distal portion of the catheter body to maintain centering of the catheter and form a passage as the catheter is advanced through a chronic total occlusion.

This invention provides a method and apparatus for reconstructing chronically totally occluded coronary arteries (CTOs). The method includes: obtaining multiple first markers on a forward angiographic image of the CTO during interventional treatment, each first marker corresponding to the location of multiple markers; obtaining multiple second markers on a reverse angiographic image of the CTO, each second marker corresponding to the location of multiple markers; and reconstructing the occluded segment of the coronary artery between the proximal and distal segments based on the composite image to connect the proximal and distal segments, thereby obtaining a reconstructed angiographic image containing the intact lesion. This invention effectively solves the problems of requiring an additional vascular access and bidirectional angiography in interventional treatment of CTOs in related technologies, reducing the risks and surgical costs associated with these technologies.

The present invention relates, inter alia, to catheters comprising roll films and methods of using roll film catheters through stenosis or chronic total occlusion.

Devices and methods for exploiting intramural (e.g., subintimal) space of a vascular wall to facilitate the treatment of vascular disease, particularly total occlusions. For example, the devices and methods disclosed herein may be used to visually define the vessel wall boundary, protect the vessel wall boundary from perforation, bypass an occlusion, and / or remove an occlusion.

An occlusion catheter system is provided for at least partial occlusion of a vessel. The occlusion catheter system includes a proximal hub having an inflation connection port and an inflation pathway. An inflation catheter member is fluidly connected to the proximal hub. An occlusion balloon has a proximal balloon end and a distal balloon end, the proximal balloon end being fluidly connected to the inflation catheter member. A distal catheter member is connected to the distal balloon end and includes an atraumatic tip on a distal end thereof, the atraumatic tip having a substantially circular profile in one configuration. The occlusion balloon, the inflation catheter member and the distal catheter member have a greatest outer diameter of less than 7 Fr in an uninflated condition.

Microcatheter systems for crossing total occlusions are provided. Aspects of the systems include: a distal crosser unit and an actuator. In embodiments, the distal crosser unit comprises: a microcatheter having a guidewire lumen; a guidewire present in the guidewire lumen and extending beyond the distal end of the microcatheter; a proximal balloon attached to both the microcatheter and the guidewire, wherein the proximal balloon is configured to longitudinally expand; and a distal anchor member present on the guidewire. In such embodiments, the actuator is configured to sequentially inflate and deflate the proximal balloon such that the distal crosser unit progressively moves across a chronic total occlusion. Also provided are methods for modulating a total occlusion, e.g., by crossing a total occlusion or modifying a proximal cap thereof, e.g., by producing a divot or hole in the proximal cap. In addition, standalone distal crosser units and kits comprising components of the systems described herein are provided. The systems, units, methods and kits find use in a variety of different applications, including balloon angioplasty applications or other catheter-based therapies or treatments.

A system and method is provided for generating ultrasound at the tip of an intravascular catheter. This may be used for the treatment of vascular occlusions, including chronic total occlusions (CTOs) and thrombotic occlusions (e.g., deep vein thrombosis, stroke, myocardial infarction). For instance, the systems and methods may be used to induce cavitation to enhance the enzymatic degradation of a vascular occlusion. In some configurations, the approach employs a hollow cylindrical transducer, electrically stimulated in the radial direction at a frequency corresponding to the length mode excitation, thereby projecting ultrasound forwards past the catheter tip. This design overcomes electrical impedance issues for the generation of low frequencies with a smaller diameter transducer capable of negotiating a coronary artery. The hole within the transducer may accommodate a guidewire to facilitate its placement adjacent to the proximal portion of the occlusion.

The invention relates to the technical field of interventional medical instruments, and particularly discloses a catheter assembly for coronary artery interventional therapy, the catheter assembly comprises a catheter body and a guide structure arranged at the far end of the catheter body, a penetrating guide cavity helpful for guiding a micro catheter is formed in the catheter body, and a guide part is of a trumpet-shaped structure and is communicated with the guide cavity; by arranging the guide section with the inner diameter matched with the outer diameter of the micro-catheter, axial guide and support can be provided in the micro-catheter propelling process, the butt joint difficulty of the micro-catheter and the guide wire is reduced, and the micro-catheter or the guide wire can be guided to enter the catheter smoothly. And the stability and smoothness of orbit establishment in the coronary artery chronic complete occlusion interventional therapy process are improved.

An apparatus for treating an intravascular total occlusion may include a self-orienting device including an elongate shaft and an inflatable orienting element. The shaft includes an inflation chamber having a first non-circular shape and a working chamber having a second non-circular shape. The inflatable orientation element includes first and second inflatable members extending laterally from the shaft. The outer diameter of the shaft is 0.045 inches or less, the cross-sectional area of the first non-circular cross-sectional shape is at least 0.00013 square inches, and the cross-sectional area of the second non-circular cross-sectional shape is at least 0.00056 square inches. The shaft may include a distal tail extending distally from the inflatable orientation element, the distal tail being at least 15 millimeters long. The shaft may include a plurality of first apertures in communication with the working chamber and disposed in the distal tail.

This invention discloses an anchoring-guided microcatheter and its operation method. The anchoring-guided microcatheter comprises, from distal to proximal, a distal tip, a balloon anchoring body, an internal tube, a rear external tube, and a handle. The internal tube forms a continuous guidewire lumen, through which the guidewire enters from the proximal guidewire lumen interface and exits from the distal tip, providing guidewire support throughout the catheter's length. An independent injection chamber is formed between the rear external tube and the internal tube, allowing the balloon to inflate and retract, thereby achieving anchoring and fixation of the lesion area. The distal tip is a pre-formed fixed-angle structure with radiopaque properties, which, together with the radiopaque ring within the balloon, enables precise visual tracking of the distal end of the catheter and the anchoring position. This invention integrates anchoring, guidance, and radiopaque into a single unit, resulting in a simple and reliable structure that eliminates the need for complex active adjustment mechanisms. It can safely and efficiently pass through complex and tortuous vessels such as coronary arteries and peripheral CTO (chronic total occlusion), significantly improving the stability, positioning accuracy, and operational safety of interventional procedures.

A microcatheter system for crossing total occlusions including a distal crosser unit and an actuator is disclosed. The distal crosser unit comprises: a microcatheter having a guidewire lumen; a guidewire present in the guidewire lumen and extending beyond the distal end of the microcatheter; a proximal balloon attached to both the microcatheter and the guidewire, wherein the proximal balloon is configured to longitudinally expand; and a distal anchor member present on the guidewire. And the actuator is configured to sequentially inflate and deflate the proximal balloon such that the distal crosser unit progressively moves across a chronic total occlusion.

A vascular guide wire device comprising: a guide wire comprising a guide wire head and a laser-acoustic head sensor configured to navigate in a patient's blood vessel, said laser-acoustic head sensor connected via an optic fiber threaded through said guide wire device with a laser-acoustic diode controlled by a laser-acoustic diode controller; a computerized system electronically communicating with said laser-acoustic head sensor, said computerized system comprising a computer, image processing means and display means and configured to provide images and measurements 2-centimeters ahead inside a patient's arteries occlusions therein purposing to move and navigate safely into the right artery lumen; first steering means connected with said guide wire head and configured to navigate said laser-acoustic head sensor according to said image processing results; and opening means connected with said guide wire head for opening total occlusion of said artery.