60 results about "Atherectomy device" patented technology

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.

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.

An atherectomy device including a catheter body, a nosecone and a driveshaft. The catheter body may include a fixed jog section having a fixed curvature, and a flexible section having a greater lateral flexibility than the fixed jog section. The flexible section may include circumferential slits that are configured to allow the flexible section to passively bend in multiple directions. The nosecone may be attached to a distal end of the catheter body. The driveshaft may be configured to rotate within the catheter body and to move distally and proximally within the catheter body. A distal end of the driveshaft may include an annular cutter.

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.

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.

Telescoping, self-driving, and laterally-pushing atherectomy devices are provided, each having a flexible sheath, a cutter with helical flutes, and a drive assembly. The drive assembly can have a flexible driveshaft rotatably translational with the lumen of the flexible sheath, a positive displacement pump to transport cut tissue, and a flexible drive shaft that can be longer than the flexible sheath for a reversible telescoping of the drive assembly from the lumen of the flexible sheath. The positive displacement pump can be a screw pump having a drive screw portion exposed for contact with a vascular lumen for a self-driving of the device through the vascular lumen. A reversibly-expandable, lateral pushing member can be included at the distal end of the flexible sheath for a lateral pushing of the cutter. Improved cutting heads, and methods of making them, are provided for cutting a combination of soft and hard plaque.

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.

A thrombectomy or atherectomy device (10) includes a catheter (12); a capture device (22, 221) disposed at a distal end of the catheter; and a laser aperture (24, 241) disposed proximate to the capture device and configured to ablate material of a clot (C) in a blood vessel (V) of a patient that is captured by the capture device.

A plaque removal device includes a cutter assembly. The cutter assembly includes a housing including a housing support surface. The cutter assembly also includes a cutting element rotatably and translationally carried by the housing. The cutting element includes at least one cutting blade configured to cut obstructive material as the cutting element is rotated relative to the housing. The cutting element also includes a cutter support surface configured to engage the housing support surface. As the cutting element is rotated relative to the housing and the at least one cutting blade cuts the obstructive material, the cutting element is translated distally relative to the housing until the cutter support surface engages the housing support surface.

The article is a catheter head used with an atherectomy device, or can be permanently attached to the device. While the internal archimedes screw rotates in the atherectomy device to pulverize the lesion and aid in aspiration, the article rotates with the screw to directly engage the lesion.

A laser atherectomy device includes a sensor-equipped light transmission conduit for monitoring physical properties of a laser application site. An integrated control unit utilizing data from the sensors is provided to optimally adjust laser energy parameters and safely and efficiently ablate vascular occlusions.

To provide a system that minimizes an atherectomy device applicable to a target portion having a small diameter, and a use method.SOLUTION: An atherectomy system 100 includes at least facing two end portions 102, 104 and one wire 101. The two end portions 102, 104 define a length of the wire 101. A helical screw 103 connected along a length direction of the wire 101 is configured to rotate together with the wire 101, and includes a tubular element 105 passing over a portion of the length. The tubular element 105 may include a tip 107 having at least one blade structure 109. The helical screw 103 may be configured to generate a negative pressure in the inside of the tubular element 105 at the time of rotation of the wire 101. A configuration may be adopted in which the negative pressure in the inside of the tubular element 105 draws a substance toward the tip 107 and enables the helical screw 103 and at least one blade structure 109 to cut the substance.SELECTED DRAWING: Figure 1

A system includes a processor circuit in communication with an intraluminal imaging device and a laser atherectomy device. An intraluminal imaging procedure is performed within a lumen with the intraluminal imaging device. The processor circuit receives the intraluminal images acquired. The intraluminal images are analyzed to determine a tissue classification for each intraluminal image. One or more laser atherectomy settings are determined for each intraluminal image based on the tissue classification. The intraluminal images and corresponding tissue classifications and laser atherectomy settings are then associated with the location at which each intraluminal image was acquired along the lumen. A laser atherectomy procedure is then performed within the same lumen. As the laser atherectomy device is moved to positions within the vessel, the laser atherectomy setting associated with each position is retrieved from the memory and automatically applied to the laser atherectomy device.

The present disclosure relates to ultrasonic catheters including vibration wires that are positionable in a retracted position and an extended position, and their methods of use. In operation, catheters according to the present disclosure are operable in an occlusion crossing mode, in which the catheter emits ultrasonic energy with the vibration wires in the retracted position and in an atherectomy mode, in which the catheter emits ultrasonic energy with the vibration wires in the extended position, causing the vibration wires to oscillate. The vibration wires may directly or indirectly engage plaque within an artery, causing the plaque to break free from the artery wall. The oscillation of the vibration wires may be less abrasive than conventional cutting elements used in atherectomy procedures, such that catheters according to the present disclosure may cause less trauma to artery walls as compared to conventional atherectomy devices.

An atherectomy device includes a catheter that is coupled to a handle. The catheter includes an outer sheath and a drive shaft carried within and rotatable relative to the outer sheath. A cutter assembly is coupled to and extends distally relative to the outer sheath. The cutter assembly includes a housing coupled to and extending distally from the outer sheath. A proximal cutting element is rotatably carried by the housing, and the proximal cutting element is coupled to and extends distally from the drive shaft. The proximal cutting element includes at least one proximal cutting blade, and the at least one proximal cutting blade has a negative rake angle. A distal cutting element is rotatable with the proximal cutting element relative to the housing. The distal cutting element includes at least one distal cutting blade, and the at least one distal cutting blade has a positive rake angle.

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

A thrombectomy or atherectomy device (10) includes a thrombectomy or atherectomy catheter (12) including a cutter (20), and a physical barrier (22, 24) disposed proximate to the cutter. In some examples, the physical barrier (22, 24) can have a stiffness effective for the physical barrier to deflect a blood vessel having a thickness less than a first predetermined thickness threshold and effective for a thrombus or atheroma on an inner wall of the blood vessel to deflect the physical barrier.

The article is a catheter head used with an atherectomy device, or can be permanently attached to the device. While the internal archimedes screw rotates in the atherectomy device to pulverize the lesion and aid in aspiration, the article rotates with the screw to directly engage the lesion.

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.

An atherectomy system may include an atherectomy device and a guidewire that is adapted to be used in combination with the atherectomy device. The atherectomy device includes a driveshaft and an atherectomy burr that is secured to the driveshaft. The guidewire includes a distal region having a distal region diameter ranging from 0.01 inches (0.254 millimeters) to 0.013 inches (0.33 millimeters) and a bending stiffness that emulates that of stainless steel having a diameter of 0.0077 inches (0.178 millimeters). The guidewire includes a proximal region having a proximal region diameter that is greater than the distal region diameter. The guidewire includes an intervening taper region. In some cases, the proximal region of the guidewire may have a bending stiffness that emulates that of stainless steel having a diameter of 0.009 inches (0.229 millimeters).

The invention relates to the technical field of medical instruments, in particular to a vascular intima stripping surgical device, a blade is rotatably connected to the inside of a U-shaped frame through a rotating rod and a bearing, one side of the rotating rod penetrates through the bearing and the U-shaped frame and extends to the outside of the U-shaped frame, a first gear is fixedly connected to the outer rod wall of the rotating rod, a fixing groove is formed in one side of an operating handle, and the fixing groove is fixedly connected to the operating handle. The inner wall of the fixing groove is fixedly connected with a first stepping motor with a self-locking structure, the output end of the first stepping motor is fixedly connected with a second gear, the second gear is meshed with the first gear, and the lower end of the side, away from the cutting edge, of the blade is fixedly connected with a telescopic arm with an adjusting buckle. The device has the beneficial effects that the second gear is driven by the first stepping motor to be meshed with the first gear, the angle of the blade is accurately regulated and controlled, and the device can be flexibly matched with different operation scenes by cooperating with the telescopic arm with the adjusting buckle; meanwhile, the elastic protection ring below the blade can effectively prevent the instrument from directly damaging normal vascular tissues.

An atherectomy device including a catheter having a proximal end and a distal end, at least one magnetically actuated bead movably coupled to the catheter at the distal end, the at least one magnetically actuated bead comprising an abrasive surface for performing an atherectomy procedure, a first electromagnet coupled to the distal end of the catheter at a position proximal to the at least one magnetically actuated bead, and a second electromagnet coupled to the distal end of the catheter at a position distal to the at least one magnetically actuated bead. The first electromagnet and the second electromagnet are configured to move the at least one magnetically actuated bead along a length of the catheter.

Telescopic, self-propelled, and side-pump atherectomy devices are provided, each with a flexible sheath, a helically fluted cutter, and a drive assembly. The drive assembly may have a flexible drive shaft that rotates and moves with the lumen of the flexible sheath, a positive displacement pump for transporting the cut tissue, and a flexible drive shaft that may be longer than the flexible sheath to allow reversible telescoping of the drive assembly away from the lumen of the flexible sheath. The positive displacement pump may be a screw pump with a portion of the drive screw exposed to contact the vascular lumen, allowing self-propulsion of the device through the vascular lumen. A reversibly expandable side-pump element may be included at the distal end of the flexible sheath to laterally push the cutter.Improved cutting heads and methods for their manufacture are provided, for cutting a combination of soft and hard plate.

To provide telescoping, self-driving and laterally-pushing atherectomy devices.SOLUTION: Telescoping, self-driving and laterally-pushing atherectomy devices are provided, each having a flexible sheath, a cutter with helical flutes, and a drive assembly. The drive assembly can have a flexible driveshaft rotatably translational with the lumen of the flexible sheath, a positive displacement pump to transport cut tissue, and a flexible drive shaft that can be longer than the flexible sheath for a reversible telescoping of the drive assembly from the lumen of the flexible sheath. The positive displacement pump can be a screw pump having a drive screw portion exposed for contact with a vascular lumen for a self-driving of the device through the vascular lumen. A reversibly-expandable, lateral pushing member can be included at the distal end of the flexible sheath for a lateral pushing of the cutter. Improved cutting heads, and methods of making them, are provided for cutting a combination of soft and hard plaque.SELECTED DRAWING: Figure 4D

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.