46 results about "Mechanical thrombectomy" patented technology

Mechanical thrombectomy apparatuses that may be configured to prevent or reduce jamming (e.g., “anti-jamming” thrombectomy devices), grab clot, and / or macerate the thrombus, e.g., clot, being removed. These mechanical thrombectomy apparatuses may include a tractor comprising a flexible tube of material that inverts as it rolls over itself while being drawn into a catheter in a conveyor-like motion. In particular, described herein are mechanical thrombectomy apparatuses having tractors selectably extendable projections that may aid in grabbing and / or macerating a clot. Also described herein are seesawing tractors for mechanical thrombectomy apparatuses.

Mechanical thrombectomy apparatuses including an inverting, rolling conveyor region (“tractor”) at the distal end that are configured to grab and remove thrombus material. In particular, described herein are mechanical thrombectomy apparatuses that are adapted to prevent premature deployment of the tractor, e.g., by including a tractor hold (e.g., a housing, a lock, a clamp, etc.) or the like to secure the outer end of the tractor against and / or relative to the elongate inversion support.

Mechanical thrombectomy systems including an elongate catheter configured as an elongate inversion support, a flexible tractor configured to roll and invert over the distal end of the elongate inversion support, and a clot engaging member on the distal end of an elongate manipulator are described herein. These systems may capture a clot using the clot engaging member and draw the clot and clot engaging member and roll the flexible tractor into the catheter to remove the clot and clot engaging member from a vessel.

Mechanical thrombectomy apparatuses (devices, systems, etc.) and methods for positioning them within a vessel and using them to remove a thrombus, e.g., clot, from within a vessel. In particular, described herein are methods of advancing an inverting tractor thrombectomy apparatus having a tractor comprising a flexible tube of material that inverts over itself as it rolls over a distal end opening of an elongate inversion support by extending the tractor region and / or a puller coupled to the tractor distally beyond the end of the catheter. Also described herein are power-driven mechanical thrombectomy apparatuses.

An enhanced cross stream mechanical thrombectomy catheter with backloading manifold having a distal end with outflow and inflow orifices at one side for producing concentrated cross stream jet flow for selective and concentrated thrombus ablation during thrombectomy procedures. The invention provides for suitable distancing of high powered ablation or suction forces from the near walls of the vasculature. Cross stream flow emanating from the one side of the distal end of the catheter resultantly urges the distal end of the catheter and thus the opposing non-orificed side of the distal end of the catheter toward and against the vascular wall to inhibit contact of the inflow orifice with the vascular wall. Features of the invention include a geometrically configured insert to facilitate the backloading or exchange of guidewires.

Methods and apparatuses for mechanically removing objects from a body. In particular, described herein are thrombectomy methods and mechanical thrombectomy apparatuses for removal of blood clots from within a lumen of a blood vessel.

A mechanical thrombectomy device system is disclosed that is made from a single piece of biocompatible material, including a proximal flow block portion / feature, and / or, a flow block feature in the device body portion, a guidewire like delivery portion and an expandable, treatment portion. The construction of the device from a single piece allows for a seamless transition from the delivery portion to the treatment portion, thus removing any joints or bonding of the two portions together as separate pieces. This improves the strength of the system as a whole and greatly reduces the possibility of the two parts unintentionally detaching from each other. Likewise, the distal treatment portion is cut from a piece of material the same size as the proximal delivery portion, allowing the device to be compacted to a similar size profile giving it delivery advantages including a lower delivery force required and requiring small access systems, and the treatment portion's surface can be altered to enhance embolus affinity by either coating with a substance or changing the texture by mechanical or chemical means.

Methods and apparatuses for mechanically removing objects from a body. In particular, described herein are thrombectomy methods and mechanical thrombectomy apparatuses for removal of blood clots from within a lumen of a blood vessel.

Mechanical thrombectomy apparatuses (devices, systems, etc.) and methods for positioning them within a vessel and using them to remove a thrombus, e.g., clot, from within a vessel. In particular, described herein are methods of advancing an inverting tractor thrombectomy apparatus having a tractor comprising a flexible tube of material that inverts over itself as it rolls over a distal end opening of an elongate inversion support by extending the tractor region and / or a puller coupled to the tractor distally beyond the end of the catheter. Also described herein are power-driven mechanical thrombectomy apparatuses.

Mechanical thrombectomy apparatuses (devices, systems, etc.) and methods for positioning them within a vessel and using them to remove a thrombus, e.g., clot, from within a vessel. In particular, described herein are methods of advancing an inverting tractor thrombectomy apparatus having a tractor comprising a flexible tube of material that inverts over itself as it rolls over a distal end opening of an elongate inversion support by extending the tractor region and / or a puller coupled to the tractor distally beyond the end of the catheter. Also described herein are power-driven mechanical thrombectomy apparatuses.

An enhanced cross stream mechanical thrombectomy catheter with backloading manifold having a distal end with outflow and inflow orifices at one side for producing concentrated cross stream jet flow for selective and concentrated thrombus ablation during thrombectomy procedures. The invention provides for suitable distancing of high powered ablation or suction forces from the near walls of the vasculature. Cross stream flow emanating from the one side of the distal end of the catheter resultantly urges the distal end of the catheter and thus the opposing non-orificed side of the distal end of the catheter toward and against the vascular wall to inhibit contact of the inflow orifice with the vascular wall. Features of the invention include a geometrically configured insert to facilitate the backloading or exchange of guidewires.

The present invention refers to a composition comprising uric acid for its use in the treatment of brain stroke in a patient treated by means of mechanical thrombectomy.

A mechanical thrombectomy device system is disclosed that is made from a single piece of biocompatible material, including a proximal flow block portion / feature, and / or, a flow block feature in the device body portion, a guidewire like delivery portion and an expandable, treatment portion. The construction of the device from a single piece allows for a seamless transition from the delivery portion to the treatment portion, thus removing any joints or bonding of the two portions together as separate pieces. This improves the strength of the system as a whole and greatly reduces the possibility of the two parts unintentionally detaching from each other. Likewise, the distal treatment portion is cut from a piece of material the same size as the proximal delivery portion, allowing the device to be compacted to a similar size profile giving it delivery advantages including a lower delivery force required and requiring small access systems, and the treatment portion's surface can be altered to enhance embolus affinity by either coating with a substance or changing the texture by mechanical or chemical means.

Mechanical thrombectomy apparatuses (devices, systems, etc.) and methods for deploying and / or positioning them within a vessel and / or using them and / or removing a thrombus, e.g., clot, from within a vessel using them.

Rolling tractor tube mechanical thrombectomy apparatuses that may be deployed from out of a catheter in situ are described herein. These apparatuses may be delivered out of a catheter from a collapsed delivery configuration within the catheter to a deployed configuration out of the catheter, in which the same catheter is re-inserted between a tubular tractor and an elongate puller. In particular, any of these methods and apparatuses may be adapted to work with a tractor tube having an open end that is biased open, including using an annular bias.

A mechanical thrombectomy device system is disclosed that is made from a single piece of biocompatible material, including a proximal flow block portion / feature, and / or, a flow block feature in the device body portion, a guidewire like delivery portion and an expandable, treatment portion. The construction of the device from a single piece allows for a seamless transition from the delivery portionto the treatment portion, thus removing any joints or bonding of the two portions together as separate pieces. This improves the strength of the system as a whole and greatly reduces the possibilityof the two parts unintentionally detaching from each other. Likewise, the distal treatment portion is cut from a piece of material the same size as the proximal delivery portion, allowing the device to be compacted to a similar size profile giving it delivery advantages including a lower delivery force required and requiring small access systems, and the treatment portion's surface can be alteredto enhance embolus affinity by either coating with a substance or changing the texture by mechanical or chemical means.

A medical apparatus has a thrombectomy device disposed in a sheath lumen of a sheath that is movable between an initial extended position and a retracted position. The thrombectomy device includes a first elongate cannula having a distal tip, a guidewire lumen, and a perforated region, which is proximal to the distal tip and is in fluid communication with the guidewire lumen. A second elongate cannula, which is configured to rotate, has a second lumen and a mechanical thrombectomy whisk, which is proximal to the distal tip. A third elongate cannula has a third exterior surface, a third lumen, an inflation passageway, an inflatable balloon connected to the third exterior surface, and an expandable embolic filter connected to the third exterior surface at a location distal to the inflatable balloon. The first elongate cannula is disposed in the second lumen. The second elongate cannula is disposed in the third lumen.

An expandable mechanical device for use during a thrombectomy medical procedure having enhanced visibility during imaging. Furthermore, the configuration of the eyelet and / or strut optimizes retention of the marker in the eyelet during the medical procedure without increasing overall profile of strut.

The invention relates to the field of medical instruments, in particular to a multifunctional treatment catheter. The multifunctional treatment catheter comprises a catheter body and a balloon wrapping the outer wall of the catheter body, wherein a micro-catheter is arranged in the catheter body, the inner part of the micro-catheter is hollow to form a micro-catheter inner cavity channel, a suction inlet is formed in the near end of the catheter body, and a pressurizing inlet is further formed in one side of the near end of the catheter body; the catheter body is a three-cavity catheter whichis not in communication with the catheter body, the three-cavity catheter comprises a suction cavity channel, a pressurizing cavity channel and a micro-catheter inner cavity channel, the suction cavity channel communicates with the suction inlet, the pressurizing cavity channel communicates with the pressurizing inlet, and the catheter not only can block blood flow, but also has a thrombus suctionfunction. The micro-catheter is arranged in the multifunctional treatment catheter, and a thrombectomy stent can be conveyed for mechanical thrombectomy. When catheter thrombus suction is performed,stent thrombus taking can be performed at the same time, so that the operation time is shortened, and expenses borne by a patient and medical insurance expenses are reduced.

The invention relates to a surgical instrument for safe grasp and removal of thrombi and a use method. The surgical instrument is characterized by including a three-dimensional tapered structure and alink structure. A distal protection head is disposed at a tapered end of the three-dimensional tapered structure, the link structure is disposed at the open end of three-dimensional tapered structure, and the main body of three-dimensional tapered structure adopts a reticular three-dimensional tapered structure, which includes a hollow reticular structure composed of an axial part and a circumferential part. The three-dimensional tapered structure adopts a shape memory material with biocompatibility. In all circumferential directions, the surface of the shape memory material is also coated with another biocompatible material at the same time. The shape memory material with biocompatibility and the other biocompatible material have mismatching thermal expansion coefficients. The surgical instrument provided by the invention can well solve the two problems of surgical complications caused by acute cerebral vascular rupture and secondary thrombus blockage caused by intraoperative thrombus debris in the field of interventional mechanical thrombectomy at present.

A mechanical thrombectomy device, and methods of manufacturing and using the mechanical thrombectomy device, are described. The mechanical thrombectomy device includes several clot arrestors independently mounted on a support wire. The clot arrestors have expandable frames that are eccentrically supported on the support wire. The independently and eccentrically mounted clot arrestors are arranged to allow a clot to pass into, and be captured by, one of the expandable frames. Furthermore, the independently and eccentrically mounted clot arrestors deform independently of one another such that retraction of the mechanical thrombectomy device through tortuous vasculature can stretch one clot arrestor without stretching another one of the clot arrestors to allow the clot to be retained by the unstretched clot arrestors. Other embodiments are also described and claimed.

The invention discloses a mechanical thrombectomy catheter device, and belongs to the technical field of vascular intervention medical instruments. The device comprises a suction crushing head, a suction guide pipe, a spiral spring blade, a cutting blade and a driving handle, the suction crushing head is of a tubular structure, the near end of the suction crushing head is fixed to the far end of the suction catheter, an end face limiting part is arranged in an opening in the far end of the suction crushing head, and a hollowed-out groove hole is formed in the side face of the suction crushing head. Cutting blades are fixed to the outer side of the circumference of the far end of the spiral spring blade, the spiral spring blade penetrates through the suction catheter, the far end of the spiral spring blade is inserted into the suction crushing head and limited to the inner side of the end face limiting part, and the cutting blades are located on the inner side of the groove hole. And the near end of the suction catheter is hermetically connected with a driving handle for driving the spiral spring blade to rotate. The spiral spring blades drive the cutting blades to rotate, the cutting blades can crush high-consistency large thrombus adsorbed in the groove holes into small thrombus blocks, and the small thrombus blocks are conveniently transferred and discharged out of the body.

The invention relates to the field of medical devices, in particular to a multifunctional treatment catheter. A multi-functional therapeutic catheter, comprising a catheter body and a balloon coated on the outer wall of the catheter body, a microcatheter is arranged inside the catheter body, and the microcatheter is hollow inside to form a microcatheter lumen, near the catheter body The end is provided with a suction inlet, and one side of the proximal end of the catheter body is also provided with a pressure inlet; wherein, the catheter body is a three-lumen catheter that does not communicate with each other, including a suction lumen, a pressure lumen And the inner lumen of the microcatheter, the suction lumen communicates with the suction inlet, and the pressurization lumen communicates with the pressurization inlet. The catheter can also deliver a thrombectomy stent for mechanical thrombectomy. When catheter suction is performed, stent thrombectomy can be performed at the same time, which shortens the operation time and reduces the cost borne by the patient and medical insurance costs.