42 results about "Rotational atherectomy" 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 smaller blood vessels below the ankle or in the heart and effective orbital paths for abrading stenotic material in such smaller vessels.

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.

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.

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.

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 relates to the technical field of vascular intervention, in particular to an ultrasound-assisted chronic occlusion intravascular opening catheter which comprises a catheter body, a guide wire, an ultrasonic probe and a rotary grinding component. Guiding the catheter to reach the near end of the occluded blood vessel through the loach guide wire, withdrawing the loach guide wire, and rotating the catheter in vitro to drive the ultrasonic probe to rotate so as to find an optimal ultrasonic guiding direction; under the optimal ultrasonic guiding direction, ultrasonic identification is carried out on an occluded blood vessel true cavity or thrombus and plaque in a blood vessel, a guiding wire is guided to pass through or the guiding wire is used for guiding a rotary grinding component, and the rotary grinding component is controlled in vitro to advance so as to pass through the thrombus or plaque in the blood vessel; after the guide wire reaches the far end of the blood vessel through the occluded segment of the original occluded blood vessel, it is confirmed that the guide wire is located in the true cavity of the blood vessel, the guide wire is reserved to retreat from the rotary grinding component, and therefore ultrasonic-assisted guiding in the true cavity of the blood vessel is completed; if still in a blood vessel false cavity, the rotary grinding component can be used for puncturing a false cavity vascular membrane under ultrasonic guidance to enter a blood vessel true cavity, and then ultrasonic guidance occluded blood vessel opening reconstruction is achieved.

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.

The present disclosure provides systems and methods for Al model(s) that are trained to identify characteristics associated with lesions within a blood vessel and provide a suggested procedure associated with the lesion. The Al model may receive, as input, intravascular and / or extraluminal image data associated with the blood vessel and provide, as output, characteristics, e.g., characterizations, associated with the blood vessel. The characterizations may include, for example, form or tissue nature (e.g., microcalcification, punctate, fragment, sheet, nodular, or otherwise), location within the vessel (e.g., intimal, superficial, medial, deep, etc.), size (e.g., length, depth, thickness, etc.), severity, and / or the like. The characterizations may be used as input to the same and / or a different model for providing a suggested procedure associated with the lesion. The suggested procedure may include, for example, orbital atherectomy, intravascular lithotripsy, rotational atherectomy, cutting and / or scoring balloons, and / or the like.

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.

The present invention relates to a multifunctional composite surgical device suitable for removal of calcified cardiovascular tissue. The device comprises a rotational-atherectomy operation handle, wherein a rotational-atherectomy cutter is connected to an outer face of the head of the rotational-atherectomy operation handle by means of a flexible transmission shaft, a micro-force sensor is mounted on a side of the rotational-atherectomy cutter, an intravascular imaging unit is mounted at the tip of the rotational-atherectomy cutter, an ultrasonic vibration unit and a rotational-atherectomy drive unit are mounted inside the rotational-atherectomy operation handle, and the micro-force sensor, the intravascular imaging unit, the ultrasonic vibration unit and the rotational-atherectomy drive unit are each electrically connected to a control module arranged inside the rotational-atherectomy operation handle. During a rotational-atherectomy process, the rotational-atherectomy cutter is controlled to perform a reciprocating motion at a high frequency within a small range, so as to achieve the aims of reducing the degree of interaction between the cutter and calcified tissue and decreasing the probability of the rotational-atherectomy cutter becoming stuck. In combination with intravascular ultrasonic imaging technology, the internal morphology of blood vessels in the vicinity of the cutting tool is imaged before and after rotational atherectomy, thereby providing data support for operators; and in combination with micro-force sensing technology, an impact force of the cutter can be acquired in real time during the rotational-atherectomy process.

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.

The present invention relates to the technical field of medical instruments, and particularly relates to an interventional rotational atherectomy instrument and a manufacturing method therefor. The rotational atherectomy instrument comprises: an atherectomy head; a transmission shaft which is connected to one end of the atherectomy head and configured to drive the atherectomy head to rotate around the axis of the transmission shaft so as to remove vascular blockages; a guidewire which passes through the atherectomy head and the transmission shaft and points to and is inserted into the vascular blockages; and a sleeve which is sleeved on the transmission shaft, the transmission shaft rotating in the sleeve, and the atherectomy head being limited outside a sleeve opening of the sleeve. The atherectomy head comprises a base body, wherein blind holes are provided in the surface of the base body, and by means of the blind holes, the center of mass of the base body is adjusted to deviate from the advancing direction of the atherectomy head. When the transmission shaft drives the atherectomy head to rotate, the atherectomy head simultaneously moves with the center-of-mass deviation. The interventional rotational atherectomy instrument can drill a gap in a completely blocked blood vessel by means of the rotation of the atherectomy head, and can also remove blockages in a large range by means of the revolution of the atherectomy head. The interventional rotational atherectomy instrument has the advantage of high removal efficiency.

In a coronary artery rotational atherectomy intervention system provided in this application, a limit switch in a guide wire clamping system is connected to a limit switch state detection and transmission module. After the guide wire is clamped, the limit switch is triggered to be in a closed state and detected by the module. In a physiological saline infusion system, an infusion pump control element controls the infusion pump to start, and the pump is connected to an infusion pump state detection and transmission module to detect its started state. Before issuing an instruction for starting a drive motor, a controller module in the drive and control system confirms that the infusion pump is started and the limit switch is closed, to drive the rotational atherectomy head to rotate, thereby remarkably improving the apparatus's operational safety.

The present system is directed in various embodiments to rotational atherectomy systems and methods generally. More specifically, a method for methodically softening and otherwise disrupting calcification located within atherosclerotic plaque, lesion or occlusion and / or within the wall of a biological conduit or lumen. The softening and / or disruption of the calcification in the walls of the exemplary artery is accomplished in conjunction with abrading removal of any occlusion located on the interior surface of the exemplary artery and, therefore, located within the artery's lumen. This result is achieved by use of at least one eccentric head that, during high-speed rotation within the exemplary lumen, has been found to produce a combination of a low-frequency orbital motion comprising a force that is exerted against the lumen wall, with concomitant deflection of same, and / or a high-frequency pulsatile frequency, also with concomitant exertion of force against the lumen wall and deflection of same.

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.

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.

The invention relates to the technical field of medical apparatus and instruments, and discloses an intelligent debris capturing and blood flow maintaining device for coronary artery rotary atherectomy, which comprises a capturing mechanism and a guide wire, and is characterized in that a capturing assembly is positioned outside the guide wire, a rotary atherectomy catheter is sleeved outside the guide wire, a rotary atherectomy head is mounted at one end of the rotary atherectomy catheter, and the other end of the rotary atherectomy catheter is provided with a blood flow maintaining device. The rotary grinding head is arranged outside the guide wire in a sleeving mode, a blood vessel expansion mechanism is arranged on the outer side of the rotary grinding head, the capturing mechanism comprises a capturing bin, a plug disc is fixedly connected to one end of the capturing bin, and a supporting frame is fixedly connected to the interior of the capturing bin. The semi-permeable membrane and a special structure are used for capturing debris, the arc-shaped plate is matched for expanding blood vessels, smooth blood flow is guaranteed, after an operation is finished, the device and most debris can be taken out by pulling the guide wire, a small amount of missed debris can be swallowed by macrophages or enter a capturing bin to be collected, compared with traditional negative pressure adsorption, a large amount of blood is prevented from being lost, and the operation safety is improved; the postoperative recovery of the patient is facilitated.

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.

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.