27 results about "Atherectomy" patented technology

The invention relates to the technical field of medical instruments, and discloses a blood vessel intracavity plaque rotary cutting and thrombus aspiration integrated device which comprises a guiding tube and a rotary cutting tube, the rotary cutting tube abuts against the lower portion of the guiding tube, and a connecting mechanism is arranged between the ends, close to each other, of the guiding tube and the rotary cutting tube. The guiding pipe and the rotary cutting pipe are in limiting connection through a connecting mechanism, a miniature double-shaft motor is installed in the lower end of the rotary cutting pipe, the output end of the lower side of the miniature double-shaft motor is fixedly sleeved with a rotary cutting knife, a cavity is formed in one side of the rotary cutting pipe, and a suction inlet is formed in the lower end of the cavity; a fixing shell is fixedly arranged on the inner wall of one side of the middle end of the rotary cutting pipe, and a piston is arranged in the fixing shell in a sliding mode. According to the intravascular plaque rotary cutting and thrombus suction integrated device, after plaque rotary cutting is conducted, thrombus can be directly sucked out, suction equipment does not need to be inserted for the second time, the working efficiency can be greatly improved, and the pain of a patient is relieved.

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.

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.

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 an HCM rotary atherectomy simulation device which comprises a human body model, the human body model is provided with an ultrasonic esophageal approach and a thoracic cavity installation chamber, and the ultrasonic esophageal approach extends to the thoracic cavity installation chamber from the mouth of the human body model; the chest of the human body model is provided with an instrument entering part, and the instrument entering part corresponds to the chest mounting chamber in position; the device comprises a chest mounting chamber, a supporting unit and an HCM heart model, the supporting unit and the HCM heart model are both arranged in the chest mounting chamber, the HCM heart model is mounted on the supporting unit, and the supporting unit is configured to enable the HCM heart model to be adjusted in height and angle.

A control system for releasing stored rotational energy and angular momentum in a drive shaft with a distally positioned atherectomy tool, wherein the atherectomy tool is stuck within vasculature. The control system is configured to manage the release of the stored energy and angular momentum of the drive shaft safely and predictably.

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.

Embodiments of the present disclosure relate to an atherectomy system and method for using same. An example atherectomy system includes at least one wire comprising opposed ends, the opposed ends defining a length of the at least one wire; a helical screw coupled to the at least one wire along the length, wherein the helical screw is configured to rotate with the at least one wire; and a tubular element threaded over a portion of the length. The tubular element may comprise a tip comprising at least one blade structure. The helical screw may be configured to, upon rotation of the at least one wire, generate a negative pressure within the tubular element. The negative pressure within the tubular element may be configured to draw material toward the tip to enable cutting of the material against the helical screw and the at least one blade structure.

The invention provides an intraoperative positioning system based on ultrasonic breast tumor rotary atherectomy, and relates to the technical field of medical image intelligent assistance. The system comprises a training data acquisition module, a target detection model construction module, a model training module and a target detection module instruction starting module. The training data acquisition module is used for acquiring effective training data based on an ultrasonic breast tumor rotary cutting operation video to construct a basic data set; the target detection model construction module constructs a target detection model based on an improved YOLOV11 network, and detects and tracks the positions of a lump and a cutter groove in an ultrasonic video stream in real time; the model training module is used for training a target detection model; the target detection module is used for detecting an ultrasonic breast tumor rotary cutting operation video frame and detecting and tracking the positions of a lump and a knife groove in an ultrasonic video stream in real time; the instruction starting module judges whether a rotary cutter starting instruction is sent out or not based on the positions of a lump and a cutter groove in the ultrasonic video stream.

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.

Implemented is a catheter for removing material in a body lumen. The catheter includes a catheter tube, a flexible drive shaft, an infusion lumen, an extraction lumen, and a head configured to remove the material in the body lumen. The head includes a housing connected to the catheter tube. The housing includes an infusion aperture fluidly coupled to the infusion lumen, an extraction aperture fluidly coupled to the extraction lumen, and a cutting chamber having a cutout therein. The head further includes a balloon and a probe connected to and driven by the flexible drive shaft. The probe is disposed within the cutting chamber, and the probe is configured to remove the material from the body lumen, at the cutout, and pulverize the material within the cutting chamber.

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 provides a rotary cutting biopsy needle, which belongs to the technical field of biopsy equipment, and comprises a first transmission sleeve, a first gear and a second gear, the first transmission sleeve is coaxially sleeved outside an inner knife tube, and the first transmission sleeve is used for driving the inner knife tube to rotate or reciprocate along the axis direction of an outer knife tube; the first gear is relatively and fixedly arranged on the first transmission sleeve in a sleeving manner and is coaxial with the inner cutter tube, so that the first gear and the first transmission sleeve synchronously rotate; the second gear at least partially sleeves the first transmission sleeve and can rotate relative to the first transmission sleeve, and the first transmission sleeve and the second gear are in clearance fit to restrain the coaxiality of the first transmission sleeve and the second gear; one of the first gear and the second gear is a rotating gear used for driving the inner knife tube to rotate, and the other gear of the first gear and the second gear is a moving gear used for driving the inner knife tube to reciprocate in the axis direction of the outer knife tube. And by improving the coaxiality of the first transmission sleeve and the second gear, the stability during use is ensured.

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.