54 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.

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.

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.

An atherectomy burr adapted for use in an atherectomy system includes an atherectomy burr body adapted to be secured to a driveshaft. The atherectomy burr body has an outer surface defining a distal tapered surface and a proximal tapered surface, where the distal tapered surface has a first abrasiveness adapted for anterograde ablation and the proximal tapered surface has a second abrasiveness adapted for retrograde ablation. In some cases, the first abrasiveness is greater than the second abrasiveness.

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.

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.

An atherectomy catheter for use in a blood vessel includes a catheter and a rotatable cutter. The rotatable cutter can translate within the catheter to extend the cutter through a window of the catheter or retract it into the catheter. The catheter can have a fixed curve and / or a formable portion configured to facilitate positioning and movement of the cutter. In some cases, the cutter is configured to tilt and / or move radially relative to the catheter during translation.

An atherectomy system includes a drive mechanism adapted to rotatably actuate an atherectomy burr and a controller that is adapted to regulate operation of the drive mechanism. A guidewire motion detector is adapted to detect movement of the guidewire. The controller is further adapted to take action when the guidewire motion detector detects movement of the guidewire relative to the drive mechanism while the drive mechanism is operating.

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.

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.

Maneuverable cutters for removing both hard and soft vascular plaque are provided. The devices include telescoping, self-driving, and laterally-pushing atherectomy, 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, 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. A screw pump having a drive screw portion exposed for contact with a vascular lumen can be included 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. The cutters can include improved cutting heads designed for a safe removal of both soft and hard vascular plaque.

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.

A matter elimination catheter includes a catheter body extending from a catheter proximal portion to a catheter distal portion. The catheter body includes an infusion lumen, an aspiration lumen fluidly isolated from the infusion lumen, and a septum interposed between the infusion and aspiration lumens. A drive shaft is within the infusion lumen and is configured to provide rotation near the catheter distal portion. A guide wire lumen is within the drive shaft, and the infusion lumen, the drive shaft and the guide wire lumen are fluidly separated from the aspiration lumen with the septum. In one example, fluid bearings are formed between one or more of the catheter body and drive shaft or the drive shaft and a guide wire or guide wire liner when supplied with infusion fluid through the infusion lumen.

An atherectomy system includes a housing and a drive mechanism disposed within the housing, the drive mechanism including a knob that allows translation of the drive mechanism relative to the housing. A sensor is adapted to detect a current position of the knob relative to the housing. A controller is adapted to utilize the signal representative of the current position of the knob to ascertain whether the drive assembly is moving in a direction indicative of anterograde ablation or a direction indicative of retrograde ablation. A stall stop mechanism is adapted to move the drive assembly in a direction opposite a direction of ablation when a stall is determined to be imminent. The controller is further adapted to determine when a stall is imminent, and to actuate the stall stop mechanism in an appropriate direction when a stall is imminent.

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.

The present invention relates to an endovascular catheter for use in atherectomy or thrombectomy, comprising a catheter body having a proximal and a distal end, the catheter body extending in a longitudinal direction of the catheter, and a tissue ablation means positioned at the distal end of the catheter, the tissue ablation means being arranged for ablating thrombotic tissue adhering to the inside of a vessel wall, the catheter body comprising a reorientation means comprising at least one shape memory element for reorienting the distal end of the catheter, the reorientation means being arranged so that, upon selective activation of the shape memory element, the distal end of the catheter can be reoriented in at least two different directions.

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.

An atherectomy system includes a drive mechanism adapted to rotatably actuate an atherectomy burr and a controller that is adapted to operate the drive mechanism in a first operating mode in which the atherectomy burr is operated at a speed reference and with a predetermined torque limit. The controller is adapted to determine when the atherectomy burr becomes stuck while in the first operating mode and is further adapted to, when the atherectomy burr becomes stuck, operate the drive mechanism in a second operating mode that is different from the first operating mode.

An atherectomy system (10) includes a housing (26) and a drive mechanism (12) disposed within the housing, the drive mechanism including a knob (32) that allows translation of the drive mechanism relative to the housing. A sensor (40) is adapted to output a signal representative of a current position of the knob relative to the housing. A controller (42) is adapted to receive the signal representative of the current position of the knob. The controller may be adapted to quantify operation of the atherectomy system.

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.

A rapid exchange guide wire system for rapid delivery of a guide wire to a blood vessel. The system has a main guide wire and rapid a rapid exchange tube attached to the main guide wire near a distal end of the main guide wire. The rapid exchange tube has a lumen which extends in a longitudinal direction and is configured to permit the rapid exchange tube to be reversibly displaceable in the longitudinal direction over a medical device having a cylindrical portion The medical device may be a guide wire, balloon angioplasty catheter, stent delivery catheter, atherectomy catheter, intravascular ultrasound catheter, blood flow measurement wire, optical coherence tomography catheter, or a stent-on-wire 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.

A system configured to perform plaque resection and pulsed endovascular lithotripsy is provided. Aspects of the system include a console; and a handle, wherein the handle is configured to be interchangeably operably connected to: an atherectomy subsystem and a pulsed endovascular lithotripsy subsystem. The invention further provides a component comprising the system and the subsystem. The system and assembly are suitable for use in a variety of different applications, including combined procedures of plaque resection and pulsed endovascular lithotripsy, as well as balloon angioplasty applications.

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.

The present invention relates to apparatuses for cutting and removing occlusive material with imaging capabilities. According to certain aspects, the apparatus includes a catheter body, a rotatable shaft, and an imaging element. The catheter body defines a lumen and includes a distal housing that defines an opening. The rotatable shaft is disposed within the lumen of the catheter body. The rotatable shaft includes a conveying component and a cutting element that is at least partially surrounded by the distal housing. The imaging element is located on the distal housing of the catheter body.

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.