66 results about "Stenotic lesion" patented technology

The invention discloses a coronary angiography image blood vessel segmentation system based on multi-scale feature fusion. According to the invention, through the innovative design of the adaptive morphological sensing module, the system can dynamically analyze the anatomical structure characteristics of the blood vessel: the differentiable morphological operation layer converts the corrosion expansion operation into a learnable feature extraction process, so that the network can autonomously identify the gradient change and boundary trend of the blood vessel wall; the dynamic nuclear adaptation mechanism adjusts the scale and direction of morphological operation in real time according to the local blood vessel diameter and curvature characteristics, interference of surrounding tissues in a main blood vessel area can be inhibited, and continuous expression can be enhanced for capillary branches. Through deep fusion of dissection driving and data driving, the topological structure integrity of a segmentation result at a blood vessel bifurcation point and a narrow lesion area is remarkably improved, and the common problems of blood vessel fracture and misconnection in a traditional method are effectively avoided.

The invention provides a temperature self-compensating intrusive optical fiber pressure guide wire and an FFR wireless monitor, and belongs to the technical field of optical fiber sensing. Comprising a first hollow guide wire section, a second hollow guide wire section, a third hollow guide wire section and an FBG-FP cascade optical fiber sensor which are sequentially arranged, the first guide wire section is used for guiding the second guide wire section and the third guide wire section in a blood vessel; the second guide wire section and the third guide wire section are hollow and are communicated with each other; the FBG-FP cascade optical fiber sensor is arranged in the second guide wire section and extends towards the inner direction of the third guide wire section; the FBG-FP cascade optical fiber sensor comprises a multimode optical fiber, a hollow optical fiber and a single-mode optical fiber which are arranged in sequence, and the single-mode optical fiber is provided with a fiber bragg grating (FBG); the FBG-FP cascade optical fiber sensor is used for measuring temperature and strain signals in a blood vessel at the same time. The method is particularly suitable for parameter measurement of the area before and after the stenosis lesion in the blood vessel.

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.

Rotational atherectomy devices and systems can remove or reduce stenotic lesions in blood vessels by rotating an abrasive element within the vessel. The abrasive element can be attached to a distal portion of an elongate flexible drive shaft that extends from a handle assembly.

Rotational atherectomy devices and systems can remove or reduce stenotic lesions in blood vessels by rotating one or more abrasive elements within the vessel. The abrasive elements are attached to a distal portion of an elongate flexible drive shaft that extends from a handle assembly that includes a driver for rotating the drive shaft. In particular implementations, individual abrasive elements are attached to the drive shaft at differing radial angles in comparison to each other (e.g., configured in a helical array). The centers of mass of the abrasive elements can define a path that spirals around the drive shaft in a direction that is opposite to the wind direction of filars of the drive shaft, and opposite to the direction of rotation. In some embodiments, a concentric abrasive tip member is affixed to and extends distally from a distal-most end of the drive shaft.

Rotational atherectomy devices and systems can remove or reduce stenotic lesions in blood vessels by rotating one or more abrasive elements within the vessel. The abrasive elements can be attached to a distal portion of an elongate flexible drive shaft that extends from a handle assembly that includes a driver for rotating the drive shaft. In particular implementations, individual abrasive elements are attached to the drive shaft at differing radial angles in comparison to each other (e.g., configured in a helical array). The centers of mass of the abrasive elements can define a path that fully or partially spirals around the drive shaft. In some embodiments, a distal stability element with a center of mass aligned with the longitudinal axis is fixedly mounted to the drive shaft.

The invention discloses a mastoid balloon and a balloon dilatation catheter, and relates to the technical field of medical instruments. The mastoid balloon comprises a balloon main body, an expandable body and a plurality of bulges, the expandable body is arranged on the peripheral wall of the balloon main body and extends along the length direction of the balloon main body, and the expandable body is provided with a fluid inlet for introducing fluid and a fluid channel communicated with the fluid inlet, so that the expandable body can expand or contract under the action of the fluid; the protrusions are arranged on the expandable body and distributed at intervals in the length direction of the expandable body. The convex point structure of the mastoid balloon is improved, the height of the convex points can be adjusted, the balloon is effectively prevented from sliding when a stenosis lesion is expanded, and the treatment effect and efficiency are improved.

The nick balloon catheter comprises a catheter body, a balloon and a catheter seat, the catheter body comprises an inner tube and an outer tube, the outer tube is arranged on the outer side of the inner tube in a sleeving mode, the far end of the outer tube is connected with the near end of the balloon, and the near end of the outer tube is connected with the catheter seat; the far end of the inner tube penetrates out of the far end of the balloon, a first nicking piece and a guide wire are arranged in an inner cavity of the inner tube in a penetrating mode, and the first nicking piece comprises a first developing piece capable of developing under X rays; the inner tube comprises a nicking piece cavity and a guide wire cavity, the nicking piece cavity and the guide wire cavity extend in the length direction of the inner tube in a penetrating mode, the nicking piece cavity and the guide wire cavity are arranged in parallel, and the first nicking piece penetrates out of the far end of the inner tube through the nicking piece cavity. According to the nicking balloon catheter, the first nicking piece is arranged to cut the seriously narrow lesion position, the problem that the balloon cannot reach the seriously narrow lesion position is solved, and the application range of the nicking balloon catheter is wider.

Rotational atherectomy devices and systems can remove or reduce stenotic lesions in blood vessels by rotating an abrasive element within the vessel. The abrasive element can be attached to a distal portion of an elongate flexible drive shaft that extends from a handle assembly.

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.

Rotational atherectomy devices and systems can remove or reduce stenotic lesions in blood vessels by rotating one or more abrasive elements within the vessel. The abrasive elements are attached to a distal portion of an elongate flexible drive shaft that extends from a handle assembly that includes a driver for rotating the drive shaft. In particular implementations, individual abrasive elements are attached to the drive shaft at differing radial angles in comparison to each other (e.g., configured in a helical array). The centers of mass of the abrasive elements can define a path that spirals around the drive shaft in a direction that is opposite to the wind direction of filars of the drive shaft, and opposite to the direction of rotation. In some embodiments, a concentric abrasive tip member is affixed to and extends distally from a distal-most end of the drive shaft.

This document describes rotational atherectomy devices and systems for removing or reducing stenotic lesions in blood vessels by rotating an abrasive element within the vessel to partially or completely remove the stenotic lesion material.

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 invention discloses a coronary artery stenosis detection method based on coronary angiography and space-time collaborative learning, and belongs to the field of intelligent medical treatment. According to the method, through a deep feature extraction network based on a channel shuffling structure re-parameterization convolution single aggregation module, through channel segmentation and multi-branch training, feature multiplexing and information flowing are enhanced, a double-flow path is introduced into a feature fusion network to realize adaptive weighted fusion of features of different scales, and the feature fusion efficiency is improved. The representation of spatial features is improved; a space-time collaborative analysis module capable of fusing time information and local space information at the same time is adopted, and blood vessel shape deformation and hemodynamic information in a space-time sequence are effectively captured and effective feature information is enhanced by constructing time sequence connection and fusing a space-time feature graph, so that the detection accuracy and robustness of coronary artery stenosis lesions are improved. According to the method, the time and space information of the coronary angiography sequence image is comprehensively considered, the number of false positive detection is reduced, and the detection capability of the model coronary artery stenosis lesion is comprehensively improved.

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.

Rotational atherectomy devices and systems can remove or reduce stenotic lesions in implanted grafts by rotating one or more abrasive elements within the graft. The abrasive elements can be attached to a distal portion of an elongate flexible drive shaft that extends from a handle assembly that includes a driver for rotating the drive shaft. In particular implementations, individual abrasive elements are attached to the drive shaft at differing radial angles in comparison to each other (e.g., configured in a helical array). The centers of mass of the abrasive elements can define a path that fully or partially spirals around the drive shaft.

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.

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.

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.

Rotational atherectomy devices and systems can remove or reduce stenotic lesions in blood vessels by rotating one or more abrasive elements within the vessel. The abrasive elements are attached to a distal portion of an elongate flexible drive shaft that extends from a handle assembly that includes a driver for rotating the drive shaft. In particular implementations, the handle assembly encapsulates an electric motor assembly, a pump assembly, and a controller assembly.

Rotational atherectomy devices and systems can remove or reduce stenotic lesions in blood vessels by rotating an abrasive element within the vessel. The abrasive element can be attached to a distal portion of an elongate flexible drive shaft that extends from a handle assembly.

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.

The invention discloses a dynamic quantization recognition method for coronary stenosis based on a diffusion model and YOLO hypergraph optimization, and provides a self-supervised blood vessel segmentation method for solving the problems that manual annotation of a blood vessel mask is challenging and needs to consume a large number of resources due to the fact that blood vessel branches are fine and the structure is complex. The method comprises the following steps of: performing blood vessel segmentation by adopting a diffusion adversarial representation learning (DARL) model based on Transform; and aiming at the limitation of a traditional YOLO model in the aspect of feature fusion, difficulty in fully capturing a cross-level and cross-position complex feature relationship and incapability of providing accurate information of a narrow position, a Hyper-YOLO algorithm for locally enhancing attention is provided, so that blood vessel stenosis lesion identification can be effectively realized, and a good identification effect is achieved.

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.

Rotational atherectomy devices and systems can remove or reduce stenotic lesions in blood vessels by rotating one or more abrasive elements within the vessel. The abrasive elements can be attached to a distal portion of an elongate flexible drive shaft that extends from a handle assembly that includes a driver for rotating the drive shaft. In particular implementations, individual abrasive elements are attached to the drive shaft at differing radial angles in comparison to each other (e.g., configured in a helical array). The centers of mass of the abrasive elements can define a path that fully or partially spirals around the drive shaft. In some embodiments, a distal stability element with a center of mass aligned with the longitudinal axis is fixedly mounted to the drive shaft.

The invention relates to the field of medical treatment and health, in particular to a preparation method of an intravascular stent with low coating falling risk and high stability, and the intravascular stent is a drug eluting intravascular stent suitable for treating ischemic stenosis of blood vessels. The method comprises the following steps of: 1, hanging a metal bracket in a room-temperature plasma cavity, and cleaning the surface of the bracket at low power under a vacuum condition so as to remove surface impurities and oil stains; 2, high-purity nitrogen is filled into a room-temperature plasma cavity, the surface of the stent is etched with high power so that the surface of the stent can be roughened, nitrogen atoms are ionized into high-energy particles under excitation of plasma, the high-energy particles are bombarded to enter a metal surface layer, and surface layer nitriding of the material is synchronously achieved; and 3, preparing a drug coating on the surface of the surface-roughened stent by adopting an ultrasonic atomization spraying method. According to the intravascular stent with the low coating falling risk, the clinical application effect of the intravascular stent can be effectively improved, and the economic burden in the fields of medical treatment and health is reduced.

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.

According to the stent planning device for the narrow lesion blood vessels and the computer readable storage medium provided by the embodiment of the invention, the following stent planning method can be realized: the blood flow influence degrees of two narrow lesions are respectively obtained, and the first narrow lesion with the relatively large blood flow influence degree and the second narrow lesion with the relatively small blood flow influence degree are obtained; placing a first virtual stent in the first stenotic lesion; and when the vascular function evaluation index does not reach the preset condition after the first virtual stent is implanted, implanting a second virtual stent in the second stenosis lesion. According to the embodiment, firstly, the blood flow influence degrees of the two stenosis lesions are obtained, and then the virtual stent is built in the stenosis lesion with the large blood flow influence degree preferentially; stenosis lesions with large influence degree of untreated blood flow under the condition of manual operation of doctors are avoided; the virtual stent is implanted into a narrow lesion with a large blood flow influence degree, better treatment benefits can be generally obtained, and the length of the virtual stent is as short as possible on the premise that the expected treatment effect is achieved.