12 results about "Atherectomy device" patented technology

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.

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.

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.

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.

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).

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.

This invention belongs to the field of medical device technology and relates to a multi-stage rotary atherectomy head, a rotary atherectomy assembly, and a rotary atherectomy device. The rotary atherectomy head includes a base with multiple convex surfaces sequentially arranged along the axial direction of the base. The rotary atherectomy assembly includes a rotating shaft and a multi-stage rotary atherectomy head, with the rotary atherectomy head fixedly connected to the rotating shaft. The rotary atherectomy device includes a multi-stage rotary atherectomy head or a rotary atherectomy assembly, and further includes a power source for driving the rotation of the rotary atherectomy head. Compared with the prior art, this invention can improve the efficiency of rotary atherectomy for opening surgical sites, shorten the operation time, and reduce clinical risks.

An atherectomy device for removing deposits such as plaque from an interior of a vessel including an outer member, an inner member and a rotatable shaft positioned for rotational movement within the inner member. The outer and inner members are fixed axially. A rotatable tip is mounted to the distal region of the rotatable shaft for rotation about its longitudinal axis upon rotation of the shaft to remove deposits from the vessel.

Atherectomy devices and methods of using such atherectomy devices with automatic control from a control circuit and a number of sensors for advancing an abrasion element, as mounted to a rotational driven shaft and driven from a motor of a handle. If sensors attain threshold values, either above a preset threshold or below a preset threshold, the abrasion element may be retracted by a given distance and then readvanced within the lesion. This can be repeated bases on the sensor readings until the entire lesion is treated. Such threshold values can represent a problem with continued advancement of the abrasion element, such as an imminent stall or other related issues.

The present invention belongs to the technical field of medical devices, and specifically relates to an atherectomy device, comprising a puncture cannula, wherein a housing is threadedly connected to the interior of the puncture cannula, a connecting tube A is fixedly connected to one end of the housing, a hole for fixedly connecting the cannula is provided in an outer surface of the connecting tube A, a collection member is threadedly connected to the interior of the cannula, and a connecting tube B is fixedly connected to one end of the connecting tube A. By means of the collection member arranged in cooperation with the above structure, after an arterial plaque is chopped, the arterial plaque needs to be removed from a blood vessel; and after the arterial plaque is removed, the arterial plaque is placed in the collection member, components in the collection member can filter the arterial plaque for dry-wet separation, and the separated arterial plaque can be subjected to more detailed pathological and biochemical analysis to help understand the composition and characteristics of the plaque. By means of grinding the plaque and sealingly collecting same, damage to surrounding tissue during surgery can be reduced.

A plaque resection device (100) for removing occlusive material from a subject's vasculature includes a sheath (116) and a drive shaft (216) disposed within the sheath. The drive shaft (216) is coupled with a cutting element (118). The drive shaft (216) is rotatable relative to the sheath (116) to rotate the cutting element (118). A material removal channel (218) for receiving occlusive material is defined between the drive shaft (216) and the sheath (116). The drive shaft (216) includes a coil (504) having an inner lumen (512). A sleeve (516) is disposed outside the coil (504) and inhibits occlusive material in the material removal channel (218) from passing through the coil and into the inner lumen (512).