2454results about "Excision instruments" patented technology

An atherectomy device including a handle configured to be manipulated by a user. The device further includes a catheter comprising 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 a cutting stem having at least one cutting feature and at least one cutting blade coupled to the cutting stem. A distal cutting element is carried by the cutting stem and is rotatable with the proximal cutting element relative to the housing. The distal cutting element includes at least one cutting blade.

An aspiration thrombectomy system for use with a vacuum source and an aspiration catheter includes a connection tubing configured to act as a fluid conduit between an aspiration catheter, a fluid source, and a vacuum source. The system may be provided with pressure sensors associated with the connection tubing, and controllable valves. A controller may detect pressure profiles in the connection tubing via one or more pressure sensors. The controller may determine whether connection tubing is occluded based on the detected pressure profiles, and may determine a location of occlusion. The controller may operate one or more valves to introduce a fluid medium into the connection tubing.

Systems and methods for removal of thrombus from a blood vessel in a body of a patient are disclosed herein. The method can include: providing a thrombus extraction device including a proximal self-expanding member formed of a unitary fenestrated structure, a distal substantially cylindrical portion formed of a net-like filament mesh structure, and an inner shaft member connected to a distal end of the net-like filament mesh structure; advancing a catheter constraining the thrombus extraction device through a vascular thrombus, deploying the thrombus extraction; retracting the thrombus extraction device to separate a portion of the thrombus from the vessel wall and to capture the portion of the thrombus within the net-like filament mesh structure; and withdrawing the thrombus extraction device from the body to remove thrombus from the patient.

According to some embodiments, a skin treatment assembly comprises a handpiece comprising a distal end, the handpiece comprising a recess or cavity configured to receive a cartridge or other fluid container, a tip configured to be positioned along the distal end of the handpiece, the tip being configured to contact a skin surface of a subject during use, and at least one rollerball configured to extend to or near the tip, wherein the rollerball is configured to be in fluid communication with an interior of a cartridge or other fluid container secured to the handpiece, wherein the at least one rollerball is configured to contact the skin surface of the subject during use and to facilitate the delivery of fluids to said skin surface as the rollerball is moved relative to said skin surface.

The invention relates to the technical field of medical instruments, in particular to a nicking instrument based on a paper-cut structure, which comprises a destressing sleeve and a catheter seat, and further comprises a pushing section, a metal tube and a hollow head, the right end of the destressing sleeve is connected with the catheter seat, the pushing section is mounted at the left end of the destressing sleeve, and the other end of the pushing section is connected with the metal tube; the pushing section and the metal tube are coaxially connected, a PTA balloon penetrates through the catheter base, the stress relieving sleeve and the pushing section and enters the metal tube after penetrating through the pushing section, the PTA balloon is embedded in the metal tube, the tail end of the metal tube is connected with a bullet-shaped hollow head, when the PTA balloon is full, the surface of the cut metal tube begins to expand, and when the surface of the cut metal tube is expanded, the surface of the cut metal tube is expanded. When the surface of the metal tube expands to a certain degree, the expansion process of the metal tube cannot be continued due to the limitation of the included angle of the rhombus, at the moment, the continuous expansion force of the PTA balloon enables the node of the cutting section to drive the connecting rod to overturn together, and the overturned connecting rod can apply circumferential force to the narrow part of the blood vessel.

A method for capturing dislodged vegetative growth during a surgical procedure is provided. The method includes maneuvering, into a circulatory system, a first cannula having a distal end and an opposing proximal end, such that the first cannula is positioned to capture the vegetative growth en bloc. A second cannula is positioned in fluid communication with the first cannula, such that a distal end of the second cannula is situated in spaced relation to the distal end of the first cannula. A suction force is provided through the distal end of the first cannula so as to capture the vegetative growth. Fluid removed by the suction force is reinfused through the distal end of the second cannula. Subsequent to becoming dislodged, the vegetative growth is captured by the first cannula. A method for capturing a vegetative growth during removal of a pacemaker lead is also provided.

The invention belongs to the technical field of interventional medical instruments, and relates to a resection system which comprises a handle and a catheter connected to the handle and further comprises a bending adjusting assembly and a wire fixing assembly. The wire fixing assembly is movably connected to the catheter and fixedly connected to the near end of the bending adjusting wire, the bending adjusting assembly is connected to the wire fixing assembly and the catheter, the bending adjusting assembly is used for driving the catheter to rotate in the circumferential direction, and the bending adjusting assembly can control the far end of the catheter to bend through the wire fixing assembly and the bending adjusting wire. The excision system is simple and reliable in structure, capable of accurately and stably adjusting bending from different angles, diversified in function, good in operation effect and good in universality, and the medical requirement for an operator is greatly lowered.

The utility model relates to a cervical conization knife, and belongs to the field of gynecological operation instruments. Comprising a knife handle and a detachable blade. And the front end 2 of the knife handle tilts and forms an angle with the longitudinal axis of the handheld end 1 of the knife handle. According to different angles between the longitudinal axis of the front end 2 of the scalpel handle and the longitudinal axis of the handheld end 1 of the scalpel handle, the scalpel is divided into three models of A, B and C which are respectively at angles of 27 degrees, 31 degrees and 37 degrees. The cross section of the blade body is arc-shaped, the radian is consistent with that of the cervix uteri, the arc length is 1 / 8 of the circumference of the cervix uteri, namely 1cm, the two sides of the blade are both blade faces 3, the front ends of the blade faces 3 converge to enable the blade tip 4 to be an arc-shaped triangle, the rear end 5 of the blade is a parallel blunt face, and the longitudinal axis of the blade is provided with scales 6. Compared with a traditional cold knife, the novel cervical cold knife can be applied to gynecology cervical cold knife conization, surgical operation is facilitated, a cut cone can be regular, cervical injury is reduced, and the shape and the function of the cervix are reserved to the maximum extent.

A catheter system can include a tubular body, and at least one of a targeting system coupled to the tubular body, an expandable member, or a fluid injection port. A method of identifying a bifurcation can include inserting a catheter system into a first vessel, positioning the catheter system at a first location, expanding an expandable member to occlude the first vessel, delivering contrast material so the contrast material pooling proximate to the expandable member, and reviewing a shape of the contrast material in the first vessel under fluoroscopy.

The utility model provides a blade, a cutting balloon and a balloon catheter system. The blade comprises a cutting edge part and a cutter body part connected with the bottom of the cutting edge part. The blade part comprises a plurality of three-dimensional tooth block structures which are continuously arranged; the cutter body part comprises two fixed ends located at the two ends respectively and a middle part between the two fixed ends. The blade is high in cutting capacity for a diseased region, and the blade can be reliably fixed on the main body. The sacculus body of the cutting sacculus provided with the blade is provided with the groove, the blade is provided with the continuous cutting edge portion of the three-dimensional tooth block structure, the flexibility and cutting force of the cutting sacculus are enhanced, the turning performance of the cutting sacculus in a blood vessel and the cutting performance of the sacculus on lesion are improved, the blade is fixed to the groove through the blade body portion, and the cutting sacculus is fixed to the blade body portion. And the probability that the cutting balloon slips and is nested in plaques during cutting is greatly reduced.

Systems and methods can involve manufacturing medical balloons with wedge dissectors for forming serrations within vascular wall tissue for angioplasty, wherein the systems and methods include improved methods of forming the wedge dissectors and attaching the wedge dissectors to the medical balloon as well as a central shaft to increase the cross ability of the catheter to cross lesions. The design, methods of use, intended outcomes, and process to build this type of balloon is described herein.

The utility model discloses a transcatheter intracardiac space occupying resection device which comprises a sheathing canal, a catheter and a guide wire. The occupied space storage mechanism is arranged in the sheath tube and is used for fixing and temporarily storing occupied spaces under the guidance of the sheath tube; and the occupying capturing and cutting mechanism is arranged in the sheath tube, connected with the occupying storage mechanism and used for capturing and cutting occupying. By puncturing the blood vessel, conveying the working guide wire and the working sheathing canal, releasing the capturing system and fixing and cutting the space-occupying lesion in the heart cavity by virtue of the negative pressure system, the minimally invasive and accurate excision of the space-occupying lesion is realized, the operation is simple and convenient, and the risk of tumor dissemination during the space-occupying excision is reduced.

A tissue resection apparatus is provided which includes an outer tube with a helical coil disposed on a distal end. The coil is provided with a first electrode. A central tube has a distal edge profile comprising one or more surface segments. One of the surface segments includes a second electrode. The central tube is slidably disposed within the outer tube and positioned such that second electrode opposes at least a portion of the first electrode. A cutting tube is slidably disposed within the central tube and includes a cutting edge.

An intravascular device can comprise a carrier and an expansion apparatus. The device can be used for intravascular treatment of atherosclerotic plaque. The carrier can be reversibly expandable and collapsible within a vessel and can have ribbon strips extending between opposite ends in a longitudinal direction of the carrier. The ribbon strips can each be formed with a plurality of elongated protrusions thereon. The expansion apparatus can be used to actuate the ribbon strips each with the plurality elongated protrusions to pierce a luminal surface of the plaque with lines or patterns of microperforations which act as serrations for forming cleavage lines or planes in the plaque.

Disclosed herein are devices for mechanically removing clot and / or other material from implants implanted in the vasculature of a patient, and associated systems and methods. In some embodiments, a system for removing clot material from an implant—such as a stent—includes a clot treatment device configured to be deployed within the stent, a handle, and a first elongate member and a second elongate member coupling the clot treatment device to the handle. The first elongate member couples a first end portion of the clot treatment device to the handle, and the second elongate member couples a second end portion of the clot treatment device to an actuator of the handle. Actuation of the actuator is configured to move the second elongate member relative to the first elongate member to move the first and second end portions toward one another to radially expand the clot treatment device.

A catheter system can include a tubular body, and at least one of a targeting system coupled to the tubular body, an expandable member, or a fluid injection port. A method of identifying a bifurcation can include inserting a catheter system into a first vessel, positioning the catheter system at a first location, expanding an expandable member to occlude the first vessel, delivering contrast material so the contrast material pooling proximate to the expandable member, and reviewing a shape of the contrast material in the first vessel under fluoroscopy.

Aspiration catheters for removing clot material from a patient, systems including these catheter as well as methods of making and using these aspiration catheters may be configured to remove clot material in long, continuous strips that prevent release of smaller clot fragments back into the vessel. Also described herein are blood collection apparatuses that may allow safe and easy reperfusion of collected blood.

Systems and methods can involve wedge dissectors attached to strips in turn attached to medical balloons, for forming serrations within vascular wall tissue for angioplasty as well as drug delivery.

Systems and methods can involve manufacturing medical balloons with wedge dissectors for forming serrations within vascular wall tissue for angioplasty, wherein the systems and methods include improved methods of forming the wedge dissectors and attaching the wedge dissectors to the medical balloon as well as a central shaft to increase the cross ability of the catheter to cross lesions. The design, methods of use, intended outcomes, and process to build this type of balloon is described herein.

Microcatheter systems for crossing total occlusions are provided. Aspects of the systems include: a microcatheter with proximal and distal regions, the distal region comprising a fixed, sealed end, wherein the microcatheter comprises a lumen that receives liquid and gas, a fluid introduction module for introducing liquid and gas into the microcatheter lumen and an actuator that repeatedly pressurizes a liquid and gas mixture present within the microcatheter lumen such that the distal region of the microcatheter vibrates, moving the microcatheter across a total occlusion. Also provided are methods for modulating a total occlusion, e.g., by crossing a total occlusion or modifying a proximal cap thereof, e.g., by producing a divot or hole in the proximal cap. The systems and methods find use in a variety of different applications, including balloon angioplasty applications or other catheter-based therapies or treatments, such as conditions in which a total occlusion may be present in a vessel, including, for example, cardiovascular disease.

A blood pump assembly includes an introducer sheath with a proximal end and a distal end, a pump body which extends within the introducer sheath, and a catheter that interfaces with the pump body and extends proximally though the introducer sheath. In a rest state, the introducer sheath forms an oval cross-section sized to encompass the catheter and a medical device. In a constrained state when the pump body is within the introducer sheath, the cross-section of the introducer sheath is circular. The malleability of the introducer sheath allows larger medical devices to be passed through the introducer sheath, while still allowing other devices to be inserted through the introducer sheath after the pump has been guided through. A perimeter of oval cross-section of the introducer sheath is equal to the perimeter of the circular cross-section of the introducer sheath.

A medical device useful for cracking or cutting an intravascular lesion may include a blade member including a first blade segment and a second blade segment separated by a blade flex point. The blade member is embedded within a polymeric pad that mounts the blade member to an inflatable balloon. The polymeric pad may include a pad flex point that aligns with the blade flex point in order to allow side bending.

The present application relates to a kind of snare cutting knives for endoscope, including proximal handle, tube body assembly, cutting assembly and limiting component;Proximal handle is equipped with limiting sliding slot;The proximal end of tube body assembly is connected with proximal handle, and the distal end of tube body assembly is equipped with insulating protection tube;Cutting assembly includes cutting ring and cutting head, and cutting head is set to the distal end of cutting ring;Limiting component includes sliding part and limiting control wire, sliding part is slidably arranged in limiting sliding slot, and the proximal end of limiting control wire is fixedly connected with sliding part, and sliding part is used to drive limiting control wire axial movement;When limiting control wire moves to the distal end of insulating protection tube, cutting head and insulating protection tube abut each other and are fixed;When limiting control wire exits insulating protection tube, cutting head can continue to move relative to insulating protection tube.

Systems and methods for aspiration thrombectomy are provided. An aspiration thrombectomy system for use with a vacuum source and an aspiration catheter includes a connection tube configured to function as a fluid conduit between the aspiration catheter, a fluid source, and the vacuum source. The system may be provided with a controllable valve and a pressure sensor associated with the connection tube. The controller may detect a pressure profile in the connection tube via one or more pressure sensors. The controller may determine whether the connection tube is occluded based on the detected pressure profile, and may determine a location of the occlusion. The controller may operate one or more valves to introduce a fluid medium into the connection tube.

Thrombectomy devices are provided that include an aspiration catheter and a spinner device movable axially within the aspiration catheter. The spinner device includes a rotation shaft including a proximal end coupled to a motor configured to spin the shaft, a distal end carrying a spinner head movable axially within the aspiration catheter and configured to generate localized suction when the shaft rotates. The spinner device may also include an outer sleeve surrounding the rotation shaft at least partially along its length to protect the aspiration catheter. The spinner device and aspiration catheter include cooperating stops that limit advancement of the spinner device to prevent the spinner head from being exposed beyond a short distance beyond a distal end of the aspiration catheter, e.g., a wing-stopper provided on one of the rotation shaft, spinner head, and outer sleeve, and a corresponding ring within the distal end of the aspiration catheter.

Systems for producing a cosmetic effect in skin tissue of a patient are provided. The systems include a treatment module and an actuation assembly. The treatment module includes at least one coring element configured to remove a portion of skin tissue when the coring element is inserted into and withdrawn from the skin tissue. The actuation assembly is operably attached to the treatment module and can translate and / or actuate the treatment module in one or more directions relative to a surface of the skin tissue. The system can perform a microcoring procedure that provides a cosmetic effect to the patient. Methods of performing a microcoring procedure are also provided.

Disclosed herein are apparatuses, systems, kits, and methods for treating skin, such as skin tightening or for treating diseases, disorders, and conditions that would benefit from tissue area or volume reduction, skin restoration, skin tightening, skin lifting, and / or skin repositioning and / or for generally improving skin function or appearance (e.g., the removal of unwanted skin features or irregularities such as sebaceous glands, sweat glands, hair follicles, necrosis, and fibrosis). Such apparatuses, systems, kits, and methods comprise an apparatus having a handheld main body and a detachably attachable tip comprising one or more needles.