18 results about "Stenotic lesion" patented technology

Some embodiments of a rotational atherectomy device can remove (partially or completely) stenotic lesions in blood vessels by rotating one or more abrasive elements in an orbital path to abrade and breakdown the lesion. In particular implementations, multiple abrasive elements are arranged along a distal portion of a drive shaft with an improved configuration so as to facilitate both efficient navigation into vessels extending from the abdominal aorta such as the common iliac artery, the external iliac artery, the internal iliac artery, the profunda artery, the gluteal artery, and the pudental artery and effective orbital paths for abrading stenotic material in such vessels and junctions between such vessels.

Some embodiments of a rotational atherectomy device can remove (partially or completely) stenotic lesions in blood vessels by rotating one or more abrasive elements in an orbital path to abrade and breakdown the lesion. In particular implementations, multiple abrasive elements are arranged along a distal portion of a drive shaft with an improved configuration so as to facilitate both efficient navigation into smaller blood vessels below the ankle or in the heart and effective orbital paths for abrading stenotic material in such smaller vessels.

This invention discloses a magnetically controlled balloon guidewire for microvascular revascularization and its manufacturing method. The magnetically controlled balloon guidewire for microvascular revascularization includes a magnetically controlled tip, a phase-change balloon, and a guidewire connected in sequence. This magnetically controlled balloon guidewire for microvascular revascularization can precisely navigate and flexibly steer, and the phase-change balloon can accurately navigate to the stenotic lesion site of the microvessel.

Some embodiments of a rotational atherectomy device can remove (partially or completely) stenotic lesions in blood vessels by rotating one or more abrasive elements in an orbital path to abrade and breakdown the lesion. In particular implementations, multiple abrasive elements are arranged along a distal portion of a drive shaft with an improved configuration so as to facilitate both efficient navigation into vessels extending from the abdominal aorta such as the common iliac artery, the external iliac artery, the internal iliac artery, the profunda artery, the gluteal artery, and the pudental artery and effective orbital paths for abrading stenotic material in such vessels and junctions between such vessels.

The application discloses a single-layer composite stent, relates to the field of medical devices, and discloses a single-layer composite stent which comprises a supporting main body and a woven wire mesh, wherein the supporting main body is a self-expanding net tube structure, and a plurality of through holes are arranged at intervals in the supporting main body; the woven wire mesh is arranged in the through holes and wound on the supporting main body; the composite stent can treat stenosis lesions in blood vessels through the supporting main body, and effectively prevent the shedding of plaques at the stenosis lesions through the woven wire; the wall thickness of the single-layer stent is adopted to realize the effect of a double-layer stent, the loss of a blood vessel cavity is minimized, the blood flow is fully ensured to be smooth, and the single-layer composite stent has remarkable clinical significance; the single-layer composite stent has good firmness and composite strength, and is not prone to delamination or even breakage and shedding after implantation, so that other complications are effectively avoided; meanwhile, the release resistance of the single-layer composite stent can be effectively reduced, and the single-layer composite stent is convenient for doctors to operate.

A device for creating a pilot hole through lesions in body passageways including an elongated flexible drive shaft advanceable over a guide wire, the drive shaft having a proximal end and a distal end, and a piloting head fixedly attached to at least a portion of the distal end of the driveshaft, wherein the piloting head comprises a distal end having a first diameter, a proximal end having a second diameter that is larger than the first diameter, and an intermediate shoulder area comprising a third diameter that is larger than the first and second diameters, wherein the intermediate shoulder area comprises a radiused crest having a backside area having an abrasive coating, and wherein the diameter of the piloting head tapers down at a generally constant angle from the intermediate shoulder area to the proximal end of the piloting head.

The invention provides a blood vessel stenosis lesion position detection method and related equipment, and the detection method comprises the following steps: obtaining a coronary angiography image sequence to be detected, the coronary angiography image sequence comprising multiple frames of images; and marking a lesion detection frame for each frame of obtained image through the trained detection neural network, and outputting a detected coronary angiography image sequence. Wherein the lesion detection frame marks at least one of the lesion position, the score representing the lesion probability and the lesion type. According to the invention, the position of the lesion can be found more conveniently and accurately, and reference is provided for a treatment scheme.

This invention discloses a drug-eluting balloon dilation catheter for non-vascular interventional procedures, comprising a cutting element, a balloon, a guidewire, and an outer tube. The outer surface of the balloon is coated with an anti-proliferative drug, and the interior of the balloon has a hollow cavity. The cutting element is connected to the distal end of the balloon and has cutting blades. The outer tube is connected to the proximal end of the balloon and communicates with the cavity of the balloon. The guidewire is disposed within the cavity of the balloon and extends axially along the balloon. This design ensures that the drug-eluting balloon can smoothly pass through narrowed lesions in body cavities while minimizing drug loss.

Some embodiments of the atherectomy device may (partially or completely) remove stenotic lesions in a blood vessel by rotating one or more abrasive elements in an orbital path to abrade and disrupt the lesions. In particular embodiments, a plurality of abrading elements are arranged along a distal portion of a drive shaft having an improved configuration to facilitate effective navigation into smaller blood vessels below the ankle or in the heart and effective orbital paths for abrading stenosing substances in these smaller blood vessels.

The invention is entitled "Dual Layer ICAD Device". The invention provides a design that combines mechanical thrombectomy and stent implantation together to more effectively treat occlusive and stenotic lesions in the cerebral vasculature, the design features a dual layer of equipment. The outer layer consists of a deployable stent cage with large cell openings that can allow thrombus to pass through the openings into the inner layer of deployable capture segments. The clot capture segments can be configured to pinch and extract occlusions. The outer cage is configured to detach from the rest of the device and remain implanted as a stent to exert outward radial force to support and / or dilate a stenotic region. The device can have a distal debris protection element to prevent distal migration of elements released during the procedure.

This application relates to the field of medical device technology and discloses a visual navigation coronary angiography guidewire assembly and its usage method. The main body of the assembly has a maximum outer diameter of no more than 0.36 mm and includes a guidewire body and a visual navigation unit integrated within it. The guidewire body consists of a proximal high-rigidity section and a distal flexible transition section. The core wire accommodates signal transmission lines through surface axial grooves or an internal hollow tube structure. A miniature sensor is fixed to the guidewire tip and communicates with an external processing terminal through a detachable proximal connection interface for real-time reconstruction of the tip's three-dimensional coordinates and orientation. This invention solves the problem of traditional X-ray fluoroscopy lacking depth information, achieving the integration of mechanical guidance and multimodal navigation. It ensures that the guidewire retains the axial support required to pass through stenotic lesions while possessing intravascular navigation capabilities, avoiding the problems of guidewire thickening or decreased mechanical maneuverability caused by integrated sensors.

A growth stent and valve and methods for making and using the same. The growth stent and valve may be delivered to treat early stage congenital lesions, while expanding to adult vessel diameters. In selected embodiments, the growth stent and valve can comprise a frame and may have a covering on some portion to prevent blood flow through a wall of the frame. The growth stent and valve advantageously can maintain radial strength across an entire range of diameters necessary to treat a narrowed lesion from birth and childhood through adulthood as the vessels grow over the lifetime of a patient.

The medicine balloon dilatation catheter comprises a balloon, a support and a conveying system, the support covers the surface of the balloon and is formed by weaving a plurality of weaving wires in a staggered mode, the conveying system is used for conveying the balloon and the support to a narrow lesion position and conducting medicine feeding, the conveying system comprises an inner tube, a middle tube and an outer tube, and a liquid medicine cavity is formed between the middle tube and the outer tube. One end of the support is hot-melted between the middle tube and the outer tube, the other end of the support wraps the tip portion of the balloon, the woven wires are hollow and form a medicine feeding cavity communicated with the medicine liquid cavity, and a plurality of medicine feeding holes which are distributed at intervals in the extending direction of the woven wires and communicated with the medicine feeding cavity are formed in the sides, away from the balloon, of the woven wires. When the balloon is expanded, the balloon can abut against the blood vessel wall at the stenosis lesion position through the nodes, so that an administration space is formed between the single woven wire and the blood vessel wall, liquid medicine flowing in from the liquid medicine cavity can be released to the administration space through the medicine feeding cavity and the administration hole, active administration is achieved, and the administration effect is good.

An intravascular sensor delivery device for measuring a physiological parameter of a patient, such as blood pressure, within a vascular structure or passage. In some embodiments, the device can be used to measure the pressure gradient across a stenotic lesion or heart valve. The sensor delivery device can be sized to pass over different sizes of guidewires to enable usage in coronary and peripheral arteries, for example.

This invention discloses a dual-pathway reflux protection device via the femoral artery, comprising: a balloon catheter; the balloon catheter extending into a first target area via the femoral artery; one side of the balloon catheter connected to a first circuit and a second circuit via a Y-connector, and a reflux pump connected between the first circuit and the second circuit; the other ends of the first circuit and the second circuit connected to a venous sheath extending into the second target area; the reflux pump activates, switching the protection device from a first state to a second state; in the first state, blood enters the first chamber of the reflux pump from the balloon catheter and the first circuit, and blood in the second chamber of the reflux pump enters the second target area via the second circuit and the venous sheath; in the second state, blood enters the second chamber of the reflux pump from the second circuit, and blood in the first chamber enters the second target area via the first circuit and the venous sheath; ensuring sufficient pressure differential and effective reflux to prevent plaque from detaching from the stenotic lesion and causing embolism in intracranial blood vessels.

A medical image processing method for determining a fractional flow reserve of a stenotic lesion through a coronary artery from medical image data is disclosed. The medical image data includes a set of images of a coronary artery region of a patient. The coronary artery region includes the stenotic lesion. The method comprises the following steps: reconstructing a three-dimensional coronary artery tree model of a patient according to medical image data; determining a stenosis lesion size according to the three-dimensional coronary artery tree model of the patient; simulating blood flow in the three-dimensional coronary artery tree model of the patient to determine a model flow; predicting a model pressure drop across the stenotic lesion using an analytical model depending on the stenotic lesion size according to the model flow; a fractional flow reserve through the stenotic lesion is determined based on the model pressure drop.

The invention relates to the technical field of medical instruments, and particularly discloses a balloon catheter and an interventional therapy device, and the balloon catheter comprises a catheter body, a head end, a balloon and a shock wave generating assembly. Wherein the shock wave generating assemblies are arranged in the balloon, and the shock wave generating assemblies are connected in series and / or in parallel. The shock wave generating assembly comprises a fixing piece, at least one first line electrode and second line electrodes corresponding to the first line electrodes, the first line electrodes are arranged at the near end of the fixing piece, the second line electrodes are arranged at the far end of the fixing piece, and the far ends of the first line electrodes and the near ends of the second line electrodes are spaced in the axial direction. According to the balloon catheter, the shock wave generator is arranged, so that the balloon catheter has excellent calcification cracking capacity, the radial space occupation is small, lesions with high stenosis rate can pass through the balloon catheter more easily in actual use, a high stenosis lesion part does not need to be opened or partially opened by using a common balloon catheter, the surgical operation is simplified, and the surgical efficiency is improved. And the treatment cost is reduced.

Some embodiments of a rotational atherectomy and lithotripsy system can partially or completely remove a stenotic lesion in blood vessels by rotating one or more abrasive elements to abrade and breakdown the lesion, by emitting acoustic energy to fracture and breakdown the lesion, or a combination of both.