26 results about "Rotational atherectomy device" patented technology

A rotational atherectomy device includes an elongate flexible shaft and an abrasive element connected to a distal end of the elongate flexible shaft. A handle includes a housing that includes an electric motor operatively connected to the elongate flexible shaft to rotate the elongate flexible shaft. A power source is electrically connected to the electric motor for supplying power thereto. A controller is configured to monitor a motor supply current of the electric motor and monitor a speed of the electric motor using a signal from a sensor. If the motor supply current is above a first predetermined threshold, the controller reduces a speed of the electric motor while attempting to maintain motor supply current of the electric motor. Then, if the motor supply current is above a second predetermined threshold higher than the first predetermined threshold, the controller stops the electric motor.

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.

Disclosed are a medical rotational atherectomy device and a rotational atherectomy method. The medical rotational atherectomy device comprises a rotational atherectomy assembly and an adjustment assembly. The rotational atherectomy assembly comprises a driver (1) and a grinding head (2). The grinding head (2) is in transmission connection with the driver (1). The adjustment assembly comprises a controller (3), a transmission (4), and a sensor (5). Both the sensor (5) and the transmission (4) are disposed between the driver (1) and the grinding head (2). The controller (3) is electrically connected to the driver (1), the transmission (4), and the sensor (5), and is configured to receive feedback from the sensor (5) and control the rotational speed of the driver (1) and the transmission ratio of the transmission (4) on the basis of actual conditions, so as to adjust the rotational speed and the torque of the grinding head (2). The medical rotational atherectomy device and the rotational atherectomy method enable the controller to control the rotational speed of the driver and the transmission ratio of the transmission on the basis of requirements, thereby flexibly controlling the rotational speed and the torque of the grinding head. This effectively achieves control over the torque and the rotational speed of the grinding head at different treatment stages. Meanwhile, the sensor enables real-time monitoring of the rotational speed and the torque of the grinding head, allowing for timely identification and resolution of jamming of the grinding head when jamming occurs, thereby ensuring surgical effectiveness.

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.

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.

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 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 utility model belongs to the technical field of medical instruments, and discloses a rotary grinding assembly and a rotary grinding device.The rotary grinding assembly comprises a rotary grinding tool bit and a flexible shaft, the rotary grinding tool bit is provided with a stepped hole, and a plurality of spiral grooves are formed in the large end of the stepped hole; the flexible shaft comprises an outer layer sleeve, the outer layer sleeve comprises a plurality of spiral wires, a center channel is formed among the spiral wires, the spiral wires and the spiral grooves are arranged in a one-to-one correspondence mode, the outer layer sleeve is arranged at the large end of the stepped hole in a penetrating mode and abuts against the stepped face of the stepped hole, and the spiral wires are attached to the groove walls of the corresponding spiral grooves. According to the rotary grinding assembly, connection between the rotary grinding cutter head and the flexible shaft is stable and reliable, high production efficiency is achieved, and the coaxiality between the flexible shaft and the rotary grinding cutter head is high.

A rotational atherectomy device for removing occlusive material from an interior of a blood vessel. The rotational atherectomy device comprises a rotatable drive shaft having a longitudinal axis, a rotatable head for cutting or abrading, the head being disposed at the distal end of the rotatable drive shaft, and a guide assembly. The guide assembly comprises a guide portion for contact with the wall of the blood vessel and for protecting the wall of the vessel. The guide assembly is transitionable between a radially contracted configuration and a radially expanded configuration. In the radially expanded configuration, the guide portion is disposed radially outward of the rotatable head.

The present disclosure provides a real-time variable loading device and system for a rotary biopsy device driving module. A system for real-time variable loading of a rotary biopsy device driving module, comprising: a driving module and a real-time variable loading device; the real-time variable loading device comprises a dynamometer unit, a mounting frame and a base, and the dynamometer unit is fixedly installed on the base. A plurality of driving modules are arranged at different positions of the mounting frame and can be connected to the dynamometer unit through movement of the mounting frame. A torque acquisition module is connected to the dynamometer unit. A main control module is connected to the torque acquisition module. A first driving device has one end connected to the dynamometer unit and the other end connected to the main control module. A second driving device has one end connected to the driving module and the other end connected to the main control module. The present disclosure can perform closed-loop testing of variable loading of the driving module, simulate the actual working environment of the driving module, detect whether the performance indicators of the driving module are qualified, and effectively test the driving module.

The present invention comprises at least sensing, monitoring, and display of motor current which is then used in various embodiments of a rotational atherectomy device to determine and / or predict, among other things, treatment progression, treatment completion, optimal rotational speed, optimal advancement or traversal speed during treatment, whether stall appears imminent, and / or reacting to stop motor rotation before a stall occurs. In some embodiments, the determination or prediction results in an automatic, or preprogrammed adjustment by the control unit of the rotational speed of the rotating drive shaft and associated tool.

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.

A rotational atherectomy device for cutting or abrading tissue. The atherectomy device comprises a rotatable drive shaft (120) having a longitudinal axis and comprising one or more internal guiding tracks (121) extending along the length of the drive shaft (120). The rotational atherectomy device further comprises one or more flexible shafts (111, 113) arranged to be longitudinally moveable along a respective internal guiding track, and an abrasive head (110) disposed at the distal end of the one or more flexible shafts (111, 113). The abrasive head (110) comprises one or more abrasive elements (111), each abrasive element connected to a respective flexible shaft (111, 113). The one or more guiding tracks (121) are arranged such that distal movement of the one or more flexible shafts (111, 113) causes the abrasive head (110) to move from a radially contracted configuration to a radially expanded configuration.

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 present application relates to a rotary grinding catheter (100) and a rotary grinding device. The rotary grinding catheter (100) comprises: a flexible driving shaft (110), the flexible driving shaft (110) being wound, and the flexible driving shaft (110) being provided with a cooling channel (111) for allowing a cooling liquid to flow; and a rotary grinding head (120) arranged at a far end of the flexible driving shaft (110), the rotary grinding head (120) being provided with a liquid outlet (121). The liquid outlet (121) penetrates from the middle area of the rotary grinding head (120) to an outer wall. The liquid outlet (121) is in communication with the far end of the flexible driving shaft (110), so that the cooling liquid passes through the cooling channel (111) and enters the liquid outlet (121). The flexible driving shaft with the cooling channel is used to convey the cooling liquid, so that the temperature generated by the friction of the flexible driving shaft can be reduced. Moreover, the cooling liquid conveyed by the flexible driving shaft is output by means of the liquid outlet, so that the cooling liquid is conveyed to an outer side of the rotary grinding head and then conveyed to a diseased site, thereby reducing the temperature rise generated when the diseased site is ground, ensuring the cooling effect, and preventing blood vessels from being damaged. Meanwhile, the generated grindings can be scoured in time, thereby preventing the blood vessels of the diseased site from being blocked by the rotary grinding head.

The present disclosure relates to a rotational atherectomy device and a medical device including the rotational atherectomy device. The rotational atherectomy device includes a drive shaft and a rotational atherectomy component connected to the drive shaft. The rotational atherectomy component includes a base and a rotational atherectomy block. The rotational atherectomy block is relatively movably assembled on the base. When the rotational atherectomy component rotates, the rotational atherectomy block moves in a direction away from the base.

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 present disclosure relates to a rotational atherectomy device and a medical device including the rotational atherectomy device. The rotational atherectomy device includes a drive shaft and a rotational atherectomy component connected to the drive shaft. The rotational atherectomy component includes a base and a rotational atherectomy block. The rotational atherectomy block is relatively movably assembled on the base. When the rotational atherectomy component rotates, the rotational atherectomy block moves in a direction away from the base.

The present invention relates to a rotational atherectomy apparatus and a rotational atherectomy device. The rotational atherectomy apparatus includes a drive device and the rotational atherectomy device. The drive device is coupled to a drive shaft of the rotational atherectomy device in order to actuate rotation of the rotational atherectomy device. The rotational atherectomy device is used for vascular surgery and includes the drive shaft and a rotating abrasive head. The drive shaft has a distal connecting portion coupled to the rotating abrasive head. The rotating abrasive head and the drive shaft separately define hollow cavities axially extending therethrough. The hollow cavities are configured for insertion of a guide body therethrough. A centroid of a structure consisting of the rotating abrasive head and the connecting portion coupled thereto does not coincide with center axes of the hollow cavities. The present invention can reduce the risk of a surgical procedure using the rotational atherectomy apparatus to recanalize a blood vessel occluded by a lesion. It can also make the surgical procedure easier to perform.

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.

The application relates to a rotary grinding device and a rotary grinding device; the rotary grinding device comprises a driving device and a rotary grinding device; the driving device is connected with a driving shaft in the rotary grinding device to drive the rotary grinding device to rotate; the rotary grinding device is used for intravascular surgery and comprises a driving shaft and a rotary grinding head; the driving shaft has a connecting part at a distal end, the connecting part is connected with the rotary grinding head; the rotary grinding head and the driving shaft both have hollow structures extending through in the axial direction; the hollow structures are used for guiding a guide body to pass through; the center of mass of the structure formed by the rotary grinding head and the connecting part is not coincident with the central axis of the hollow structure. The application can reduce the operation risk of the rotary grinding device when opening intravascular lesions and reduce the operation difficulty.