17 results about "Atherectomy" patented technology

Systems configured for performing atherectomy and pulsatile intravascular lithotripsy are provided. Aspects of the systems include a console; and a handle, wherein the handle is configured to be interchangeably operably connectable to: an atherectomy subsystem, and a pulsatile intravascular lithotripsy subsystem. Also provided are components of the systems that include the same. The systems and assemblies find use in a variety of different applications, including combined atherectomy and pulsatile intravascular lithotripsy procedures as well as balloon angioplasty applications.

An atherectomy system includes an advancer assembly and a drive assembly that is adapted to translate relative to the advancer assembly. A control knob extends from the drive assembly such that translating the control knob results in the drive assembly translating relative to the advancer assembly. A drive shaft is operably coupled with the drive assembly, the drive shaft translating relative to the advancer assembly as the drive assembly translates relative to the advancer assembly. A feedback modifier is operably coupled between the drive assembly and the advancer assembly and is adapted to provide a user of the atherectomy system with similar feedback via the control knob regardless of whether the user is moving the drive assembly in an anterograde ablation direction or a retrograde ablation direction.

An atherectomy system includes a drive assembly and an advancer assembly. The drive assembly, which may be reusable, includes a drive motor having an output shaft and a first coupler segment that is secured relative to the output shaft. A controller may be adapted to regulate operation of the drive motor. The advancer assembly, which may be single use, includes a flexible drive cable that is adapted to be releasably securable to the first coupler segment. The advancer assembly includes gearing that is secured within the advancer assembly and is operably coupled with the flexible drive cable. A burr catheter is coupled with and extends distally of the gearing. The advancer assembly is adapted to enable relative translation of the burr catheter in order to advance and withdraw an atherectomy burr rotatably secured to a distal end of the burr catheter.

An atherectomy system includes an atherectomy burr and a driveshaft adapted to carry the atherectomy burr. The atherectomy burr includes a cavity that extends distally into the atherectomy burr from a proximal end region. The driveshaft extends into the cavity. An adhesive is within the cavity to secure the atherectomy burr to the driveshaft. At least one of the cavity and / or the driveshaft are adapted to align a centerline of the atherectomy burr with a centerline of the driveshaft.

An atherectomy system includes an atherectomy burr and a driveshaft adapted to carry the atherectomy burr. The atherectomy burr includes a cavity that extends distally into the atherectomy burr from a proximal end region. The driveshaft extends into the cavity. An adhesive is within the cavity to secure the atherectomy burr to the driveshaft. At least one of the cavity and / or the driveshaft are adapted to align a centerline of the atherectomy burr with a centerline of the driveshaft.

An apparatus includes a laser atherectomy catheter configured to remove, from a patient body, a medical lead implanted in a blood vessel at a binding site comprising calcium. The laser atherectomy catheter includes a catheter lumen configured to receive the medical lead during removal of the medical lead from the patient body, and an optical fiber. The apparatus also includes a sheath configured to be positioned around the laser atherectomy catheter. At least one of the laser atherectomy catheter or the sheath define a fluid delivery lumen separate from the catheter lumen, where the fluid delivery lumen is configured to deliver a photoreactive fluid into the blood vessel. The optical fiber is configured to deliver a first laser pulse to the photoreactive fluid for lithotripsy of the calcium before or during the removal of the medical lead.

The invention provides a fat heart rotary atherectomy simulation device, which comprises a human body model, which is provided with an ultrasonic esophageal approach and a thoracic chamber, and the upper side of the thoracic chamber is provided with an opening; the fat heart model and the posture adjusting unit are arranged in the thoracic cavity; the posture adjusting unit comprises a base and a movable seat, the base is rotatably arranged in the thoracic cavity around the axis of the base, and the fat heart model is arranged on the movable seat; a connecting groove is formed in the upper side of the base, a plurality of limiting grooves distributed in the front-back direction of the human body model are formed in one side of the connecting groove, a limiting block is arranged on one side of the movable seat, and the movable seat is rotatably arranged in the connecting groove between a first position and a second position around the axis; when the movable seat is located at the first position, the limiting block is matched with the corresponding limiting groove to limit the position of the movable seat in the front-back direction; when the movable seat is located at the second position, the limiting block is separated from the limiting groove, and the movable seat can move in the front-back direction so as to change the limiting groove corresponding to the limiting block.

A drive assembly for driving an imaging catheter has a rotatable fiber and a rotatable drive shaft. The drive assembly includes a fiber optic rotating junction and a motor configured to rotate the rotatable portion of the fiber optic rotating junction. In some embodiments, the drive assembly includes a sensor configured to detect a rotational position of the fiber optic rotating junction and a processor configured to obtain the detected rotational position and stop the motor only when the fiber optic rotating junction is in a predetermined rotational position. In some embodiments, the motor includes a hollow shaft through which at least a portion of the fiber optic rotating junction extends.

Described herein are atherectomy catheters, systems and methods of use. The atherectomy catheters may include a driveshaft within an elongate body. An optical fiber may run through the driveshaft and have a distal end that is attached to an opening of a cutter at distal end of the driveshaft. The cutter and the optical fiber may be rotated respect to the elongate body by rotating the driveshaft with respect to the elongate body. The driveshaft may be longitudinally displaced to expose a distal cutting edge of the cutter for cutting tissue or plaque from a vessel lumen. Images of the vessel lumen collected through the opening of the cutter may be captured in real time with the optical fiber.

Methods, devices, and systems establish and facilitate retrograde or reverse flow blood circulation in the region of the carotid artery bifurcation in order to limit or prevent the release of emboli into the cerebral vasculature such as into the internal carotid artery. The methods are particularly useful for interventional procedures, such as stenting and angioplasty, atherectomy performed through a transcarotid approach or transfemoral into the common carotid artery, either using an open surgical technique or using a percutaneous technique, such as a modified Seldinger technique or a micropuncture technique.

Atherectomy burr suitable for use in an atherectomy system includes an atherectomy burr body adapted to be secured to a drive shaft. The atherectomy burr body has an outer surface defining a distal tapered surface and a proximal tapered surface, wherein the distal tapered surface has a first abrasiveness suitable for antegrade ablation and the proximal tapered surface has a second abrasiveness suitable for retrograde ablation. In some cases, the first abrasiveness is greater than the second abrasiveness.

The utility model belongs to the technical field of medical instruments, and discloses a combined atherosclerosis rotary cutter which comprises a rotary cutting assembly and a main body assembly. The rotary cutting assembly comprises a first straight gear, a plug-in shaft, a plug-in shell, a first deep groove ball bearing, an O-shaped sealing ring, a synchronous rope sleeve, an annular check ring, a synchronous rope, a winding spring, a guide catheter, a catheter rear seat, a guide wire, a rotary cutting tool bit, a catheter front seat, a Luer connector and a first clamping spring. The problems that in the prior art, medical instruments are high in cost and limited in operation flexibility are solved, due to the fact that the instruments need to be integrally replaced, especially the integrated power module and precise transmission component are high in cost, operation cost is remarkably increased, functional modules of disposable instruments are difficult to adjust according to requirements in an operation, tool bits of different sizes cannot be replaced, and operation cost is reduced. The accuracy and the adaptability of the operation are possibly influenced.

The application discloses a myocardial rotary cutting system containing a barbed puncture needle, which comprises a shell, a rotary cutting device assembly and a negative pressure device assembly are arranged in the shell, the rotary cutting device assembly extends to the outside of the shell, and an inner cavity of the rotary cutting device assembly is communicated with an inner cavity of the shell; a resection window and a tissue storage chamber are arranged on a side face of the rotary cutting device assembly away from the shell, the resection window is communicated with the inner cavity, a rotary cutting tube is arranged in the rotary cutting device assembly, a first bevel gear is connected to one end of the rotary cutting tube, a rotary cutting blade is formed at the other end of the rotary cutting tube, and the rotary cutting blade can form a continuous axial resection action relative to the resection window based on axial rotation; when the rotary cutting tube shields the resection window, the resection window is in a closed state; a puncture needle is arranged in the rotary cutting tube, and the puncture needle is sleeved with a boss-shaped barb structure; and the application can realize locking of tissue, continuous mechanical rotary cutting and accurate resection of myocardial tissue under a minimally invasive incision state.

The invention relates to the technical field of medical image analysis, and discloses an intelligent evaluation method and system for excision cleanliness in breast tumor minimally invasive rotary atherectomy, and the method comprises the steps: firstly obtaining preoperative and intraoperative ultrasonic images of a patient, matching a region of interest through a structural similarity index, and respectively intercepting a main image and a local patch; then, respectively extracting global features of the main image and texture features of local patches by using a deep neural network; performing spatial collaborative attention processing on the global features to establish spatial association between the preoperative image and the intraoperative image, and performing multi-instance pooling operation on the local features to aggregate key details; and the global and local features are adaptively fused through a gating network and then input into a classifier to output an evaluation result. The system further introduces a sample source weighting strategy and a man-machine cooperation closed-loop mechanism to optimize model training. According to the method, the problem of feature alignment caused by soft tissue deformation in an operation is effectively solved, and the objectivity and accuracy of excision cleanliness evaluation are remarkably improved.

A plaque removal system includes a housing and a drive mechanism disposed inside the housing, the drive mechanism including an operating knob that allows the drive mechanism to translate relative to the housing. A sensor is adapted to detect a current position of the operating knob relative to the housing. A controller is adapted to determine, using a signal indicative of the current position of the operating knob, whether the drive assembly is moving in a direction indicative of antegrade ablation or in a direction indicative of retrograde ablation. A stall stop mechanism is adapted to move the drive assembly in a direction opposite the direction of ablation upon a determination that a stall is imminent. The controller is further adapted to determine when a stall is imminent and to actuate the stall stop mechanism in the appropriate direction when a stall is imminent.

The utility model discloses a blood vessel plaque rotary cutting training simulation device, which belongs to the medical field and clinical teaching auxiliary field and comprises a training bottom plate, an adjusting mechanism is mounted on the upper surface of the training bottom plate, and a simulation mechanism is mounted on one side of the upper surface of the training bottom plate. The adjusting mechanism comprises guide grooves formed in the upper surface of the training bottom plate in a path array mode, and sliding rods are slidably connected into the guide grooves. Through cooperative use of the devices, a blood vessel module is inserted between the arc-shaped clamping plates, the blood vessel module is limited by the clamping block and the water pump, and the mounting block slides to drive the arc-shaped clamping plates and the blood vessel module to move to different positions, so that the blood vessel module forms different shapes; the blood vessel module simulates the complex trend of blood vessels in the human body, the blood vessel module simulates more real blood vessels, the flow velocity of the blood product simulant can be adjusted through the water pump, and more real blood vessel internal conditions can be simulated.