74 results about "Aortic arch" patented technology

A supra-aortic vessel access robotic control system includes a guidewire hub configured to adjust each of an axial position and a rotational position of a guidewire; a guide catheter hub configured to adjust a guide catheter in an axial direction; and a procedure catheter hub configured to adjust each of an axial position and a rotational position of a procedure catheter, and also to laterally deflect a distal deflection zone of the procedure catheter.

The invention discloses a blood flow maintaining device, an aorta covered stent system and a windowing method of an aorta covered stent, the blood flow maintaining device comprises a conveying sheath and a blood flow maintaining net basket, the conveying sheath comprises a sheath tube, and the blood flow maintaining net basket comprises a net basket and a pushing assembly; the net basket has an unfolded state and a folded state; the pushing assembly is connected with the net basket, and the pushing assembly is used for pushing the net basket in the sheathing canal; when the mesh basket is in an unfolded state after being released outwards from the far-end opening of the sheath tube, the mesh basket is suitable for supporting the aorta covered stent and forming a covered stent external blood flow channel on the outer side of the aorta covered stent. When the blood flow maintaining net basket is applied to an aortic arch intracavity isolation treatment operation, the net basket can ensure that the blood flow of each branch is not interrupted before branch windowing is completed, the requirements for hospital conditions and the operation level of an operator are reduced, the operation time is shortened, meanwhile, postoperative complications are reduced, and operation popularization is facilitated.

A catheter device is disclosed comprising; an elongate sheath (503) with a lumen and a distal end for positioning at a heart valve (6), an embolic protection device (200) for temporarily positioning in the aortic arch for deflection of embolic debris from the ascending aorta to the descending aorta, said embolic protection device is connectable to a transluminal delivery unit (130) extending proximally from a connection point (131), and having: a frame with a periphery, a blood permeable unit within said periphery for preventing embolic particles from passing therethrough with a blood flow downstream an aortic valve into side vessels of said aortic arch to the brain of a patient, and at least one tissue apposition sustaining unit (300, 350) extending from said catheter, into said aortic arch, and being attached to said embolic protection device at a sustaining point (502), for application of a stabilization force offset to said connection point at said embolic protection device, such as at said periphery, and for providing said stabilization force towards an inner wall of said aortic arch, away from said heart, and in a direction perpendicular to a longitudinal extension of said periphery, when said catheter device is positioned in said aortic arch, such that tissue apposition of said periphery to an inner wall of said aortic arch is supported by said force for improving stability and peripheral sealing. In addition related methods are disclosed.

A system for transvascular delivery to an aortic arch of a patient includes an embolic protection device, a connector mechanism, and a catheter or sheath for delivering the embolic protection device to a working zone. The embolic protection device includes a support frame having a distal portion and a proximal portion, and a filter member attached to the support frame and configured for preventing embolic materials from passing there through. At least one of the distal portion and the proximal portion includes a spring section configured for providing a radial force between the support frame and a wall of the aortic arch when in an expanded state. The embolic protection device is pivotable axially but not radially relative to the connector mechanism.

The present invention belongs to the field of medical device technology, and specifically relates to an aortic arch filter. An aortic arch filter includes: a support structure that is bendable, hollow inside, and has openings at the distal end and the proximal end; a filter hole that is arranged on the support structure and connects the inside and outside of the support structure; and also includes: a filter screen that covers the filter hole and has an inwardly concave arc-shaped spine that is concave toward the inside of the support structure. The filter screen of the present invention adopts an inwardly concave design to form a filter screen spine. Compared with a flat filter screen design, it is not easy to deposit blood clots. The blood from the ventricle has a greater impact force. The design of the spine structure causes the blood to generate a flushing force to both sides when it impacts the filter screen, further reducing the deposition of blood clots on the filter screen and ensuring the permeability of the filter screen.

This invention provides a covered stent and a stent assembly. The covered stent includes a first segment and two second segments respectively disposed at both axial ends of the first segment. The covered stent includes a bare stent and a covering. The bare stent includes a helical structure extending from one second segment through the first segment to the other second segment, and the helical structure has a greater ascending angle in the first segment than in the second segment. The covering covers the circumferential surface of the bare stent. The covered stent is used in a stent assembly as a branch stent for treating lesions involving the aortic arch, and it can well adapt to the anatomical structure of the aortic arch, improving treatment efficacy.

Methods of metering a pressure reflex response and pressure reflex metering devices and systems are provided herein. Such methods and devices position and expand an expandable structure at a target location within a patient vasculature, preferably an aortic arch, to meter a pressure reflex response to one or more lateral dimensions of the expandable structure. The pressure reflex metering device may optionally expand the structure to a variety of expanded configurations while monitoring the patient's blood pressure to determine an optimal dimension of the pressure reflex response. These metering devices and methods help assess the suitability of a patient to receive treatment and help select or customize implants placed in the vasculature for long term treatment of hypertension. The pressure reflex metering device may be further integrated into an implant delivery system such that partial deployment allows for metered response and full deployment allows for long term treatment.

The present disclosure generally relates to prosthetic implants, prosthetic implant systems, and their methods of use, for example, for treating a dissection. The prosthetic implants contemplated herein comprise an expandable arch support structure comprising one or more expandable branches configured to be placed within one or more vessels. Certain aspects of the disclosure relate to methods for treating a dissection, e.g., an aortic dissection, using said prosthetic implants and implant systems. The methods comprise advancing one or more guidewires into an ascending aorta, a descending aorta, and / or one or more one or more vessels of an aortic root or aortic arch. The methods further comprise exposing one or more components of the expandable arch support structure from a sheath. In some cases, the exposed component is an expandable branch that is advanced into the one or more vessels of the aortic root or aortic arch, thus anchoring the implant to the native aorta.

This invention discloses an automated multi-parameter assessment method, device, and medium for aortic imaging based on three-dimensional images. The method includes acquiring three-dimensional chest CT images and preprocessing them; extracting and optimizing an initial centerline based on the obtained three-dimensional vascular mask; dividing the initial centerline into ascending aorta, aortic arch, and descending aorta segments using the optimized initial centerline and the opening positions of branches on the aortic arch; extracting the average CT value of the adipose tissue surrounding the descending aorta based on the divided descending aorta segments; constructing orthogonal cross sections, performing dimensionality reduction and projection processing on each cross-sectional mask, and calculating the major and minor axes based on the farthest point pairs, outputting the major axis diameter sequence of each cross section; calculating the aortic calcification load, assessing aortic dilation and morphological variations, and evaluating the inflammatory status of the perivascular adipose tissue; and generating a comprehensive report of indicators. This invention fully utilizes existing imaging resources, improving the utilization efficiency and clinical value of medical imaging data.

The invention discloses an integrated heart valve stent with relatively short axial height, and relates to the field of heart valve stents. The invention provides an integrated heart valve stent with shorter axial height, which comprises a main body stent, and the main body stent comprises an upper stent and a lower stent which are sequentially connected from top to bottom along the axial direction of the main body stent and are integrally formed. A plurality of upper grids which are sequentially arranged in the circumferential direction of the upper support are arranged in the upper support, the upper grids are first grids or second grids, and at least one upper grid is the second grid. A plurality of lower grids are sequentially arranged in the lower support in the circumferential direction of the lower support. The top of the first grid and the top of the second grid are arrow-shaped, the arrow height of the top of the second grid is smaller than that of the top of the first grid, and the arrow included angle alpha of the top of the second grid is 60-130 degrees. The axial height of the main body stent is reduced, the bending capacity of the main body stent can be enhanced, the aortic arch passing capacity of the main body stent is improved, and meanwhile, the occurrence risk of conduction block after implantation is reduced.

This invention provides a method, electronic device, and storage medium for detecting the location of aortic dissection ruptures. Based on an image of the aorta to be detected and its true and false lumen mask images, a first search starting layer is determined according to a first search rule. Then, based on the first search starting layer and the true and false lumen mask images, the location of the aortic dissection rupture is calculated according to a second search rule. The method, electronic device, and storage medium provided by this invention can improve the detection efficiency and accuracy of aortic dissection rupture locations. Furthermore, the algorithm is simple, efficient, and has strong generalization ability, achieving fully automated detection of aortic dissection rupture locations, and is easy to implement. In addition, the method provided by this invention can determine a second search starting layer and the aortic arch location according to a third search rule, and calculate the rupture initiation location of the aortic dissection according to the second search rule, further improving accuracy.

The invention provides a covered stent, a covered stent delivery system and an intervention system, the covered stent comprises: a main covered stent having at least one pre-opening; and at least part of the guide wire is located at the pre-opened hole, and the guide wire is in releasable connection with the main covered stent. The covered stent embedded with the guide wire can be assembled into a standardized module in advance before an operation, then the standardized module is pressed, held and loaded in a conveying system, in an interventional operation, the stent is conveyed to a target position of an aortic arch through a femoral artery approach, after the main covered stent is released, the conveying system is withdrawn, the guide wire is disengaged from a side hole of a middle tube and exposed, and the guide wire is released from the side hole of the middle tube. An operator can directly use the exposed guide wire to guide the rapid exchange catheter to enter a branch blood vessel to complete passage establishment without additionally puncturing a carotid artery or a brachial artery, so that the operation time is remarkably shortened, and the stroke risk is reduced.

The application belongs to the technical field of medical devices, and particularly relates to a covered stent, which comprises a stent body and a covering arranged on the stent body, wherein the stent body comprises a keel, a wave ring assembly and a sleeve joint assembly for connecting the keel and the wave ring assembly; the wave ring assembly comprises at least one curved section connected to the keel, and the curved section comprises a plurality of curved wave rings arranged on the keel in sequence; the sleeve joint assembly comprises a plurality of curved sleeves for connecting adjacent curved wave rings; and the wave ring assembly further comprises a windowing section for puncturing the covering. According to the covered stent, puncturing can be performed on the windowing section to adapt to the branch vessels on the aortic arch, and according to the shape of the vessels, the covered stent can be arranged in a preset curved shape through the curved sleeves, so as to reduce the pressure of the covered stent on the inner wall of the vessels, reduce the stimulation of the covered stent on the vessels and prevent new vessel breaks.

The invention relates to a novel aortic stent and a manufacturing method thereof. The novel aorta stent comprises a near-end stent section, a far-end stent section, an arch stent section, a covering film and a keel line, the near-end stent section is used for being implanted into a descending aorta, the far-end stent section is used for being implanted into an ascending aorta, and the arch stent section is used for being implanted into an aortic arch. The arch support section is located between the near-end support section and the far-end support section and connected with the near-end support section and the far-end support section. The covering film covers the near-end stent section and the far-end stent section. Wherein the near-end stent section, the arch stent section and the far-end stent section jointly define a supporting cavity, the covering film has foldability, and the keel line has a pre-bent shape. According to the novel aortic stent, the whole stent can achieve the bending effect in the keel line bending direction, so that the elastic straightening force of the novel aortic stent can be reduced, the flexibility of the novel aortic stent is improved, and complications caused by poor wall attachment are reduced.

The utility model discloses a kind of delivery sheaths, it is related to medical instrument technical field, including sheath tube, sheath tube has sheath tube distal end first curved section, sheath tube distal end second curved section, sheath tube distal end third curved section and sheath tube main body section in turn from the distal end of sheath tube to the proximal end of sheath tube on sheath tube, the center line of sheath tube distal end first curved section and the center line of sheath tube distal end second curved section are on first plane, the center line of sheath tube distal end third curved section and the center line of sheath tube main body section are on second plane, the included angle between second plane and first plane is greater than 0 and less than 90 °;The center line of sheath tube distal end third curved section can be parallel with the center line of aortic arch, the outlet on sheath tube distal end first curved section can be directly opposite aortic valve orifice;The utility model can effectively avoid blood vessel or valve injury.

The invention discloses a balloon guiding catheter, which belongs to the field of medical instruments, adopts an eccentric parallel double-cavity structure design, and comprises an eccentric large cavity serving as an instrument and a thrombus channel and an eccentric small cavity serving as a balloon filling cavity channel. The outer braid layer of the catheter adopts a composite weaving mode of two round wires and one flat wire, the inner braid layer is provided with a weaving density which is gradually increased by 8-12PPI every 20mm at a Pebax section, the bending resistance is remarkably improved, large-angle bending blood vessels such as aortic arches and the like are facilitated, an effective passage is established, meanwhile, the space stability of a small cavity is effectively maintained through the double-layer weaving structure, and the service life of the small cavity is prolonged. According to the method, the small cavity is sealed due to the fact that the guide pipe is bent, rapid filling is achieved, the difference between the melting points of polyimide and Pebax materials is utilized, a core shaft cavity manufacturing process is replaced with polyimide pipe pre-extrusion, the problem that the small cavity cannot be generated due to the fact that a loose core is too small and is difficult to remove in the traditional manufacturing process is solved, and the production process difficulty and the manufacturing cost are remarkably reduced.

To provide a catheter with a suitable integrated embolic protection device. [Solution] The artificial heart valve delivery catheter includes an embolic filter to provide integrated embolic protection to prevent the release of embolus into the aorta, aortic arch, or branch vessels and other vascular systems during transvascular heart valve replacement procedures. The embolic filter will typically be fixed or movably attached to the shaft of the delivery catheter proximal to the artificial heart valve.

To provide a method and a system for placing am embolic filter in a good aortic arch.SOLUTION: An embolic filter positioning system includes a vascular delivery sheath, a filter catheter, a self-expanding embolic filter attached to a distal end of the filter catheter, and an elongate dilator having a tapered dilator tip. The elongate dilator is slidably received in a central lumen of the filter catheter, and the filter catheter is slidably received in the open lumen of the vascular delivery sheath. The tapered dilator tip is positioned distally of the distal end of the vascular delivery sheath, and the self-expanding embolic filter is radially constrained in a proximal portion of the open lumen of the vascular delivery sheath. The tapered dilator tip has an expanded configuration where it covers the open distal end of the vascular delivery sheath and facilitates entry though an arteriotomy and a contracted configuration where it can be retracted through the central lumen of the filter catheter.SELECTED DRAWING: Figure 6

The application discloses a carotid artery implanted valve delivery system and a valve delivery method. The valve delivery system comprises a control handle 100 at a proximal end, a tube assembly 200 connected with the control handle 100 and extending to a distal end, and an outer sheath 300 for guiding the tube assembly 200 to pass through a body. The tube assembly 200 has a length L1 extending to the distal end from the control handle 100, and the length L1 is at least adapted to a distance between a carotid artery surface puncture point 401 and an aortic valve 403. The outer sheath 300 has a length L2, and the length L2 is at least adapted to a distance between the carotid artery surface puncture point 401 and an aortic arch 402.

The present disclosure generally relates to prosthetic implants, prosthetic implant systems, and their methods of use, for example, for treating a dissection. The prosthetic implants contemplated herein comprise an expandable arch support structure comprising one or more expandable branches configured to be placed within one or more vessels. Certain aspects of the disclosure relate to methods for treating a dissection, e.g., an aortic dissection, using said prosthetic implants and implant systems. The methods comprise advancing one or more guidewires into an ascending aorta, a descending aorta, and / or one or more one or more vessels of an aortic root or aortic arch. The methods further comprise exposing one or more components of the expandable arch support structure from a sheath. In some cases, the exposed component is an expandable branch that is advanced into the one or more vessels of the aortic root or aortic arch, thus anchoring the implant to the native aorta.

An embolic protection device (1) for insertion into the aortic arch, comprising a filter unit (3), a frame (5) and a feeding unit (7), wherein the filter unit (3) is arranged at the frame (5) and the frame (5) provides a proximal region (9) comprising a proximal body (11) arranged in an inner region of the frame (5) and connected to the feeding unit (7), wherein the proximal body (11) comprises a first portion (13) and a second portion (15), wherein the second portion (15) is formed at one end of the first portion (13).

The invention relates to the technical field of medical instruments, and discloses an aortic arch intracavity cerebral blood perfusion and radiography dual-purpose sheath which comprises a sheath tube, the sheath tube is a hollow tube, the sheath tube has flexibility and fracture resistance, the two ends of the sheath tube are divided into a near end and a far end, a side hole is formed in the middle end of the sheath tube, the near end of the sheath tube is fixedly connected with a sheath connector, and the sheath connector is fixedly connected with the sheath tube. A connecting tube is led out of the side face of the sheath joint, a rubber sheet is arranged at the joint of the sheath joint, a crack is formed in the middle of the rubber sheet, the guide wire / sheath core penetrates through the crack, the position of a puncture femoral artery is guided through B ultrasound, the guide wire / sheath core and the sheath tube are matched to the right common carotid artery, then the sheath tube is placed through the guide wire / sheath core, and the far end of the sheath tube is located in the right common carotid artery. After the long guide wire / sheath core is pulled out and the short guide wire / sheath core is placed, blood flow is transferred to the carotid artery through the side hole in the middle section of the sheath tube, so that blood is supplied to the inside of the brain, the effect of relieving cerebral ischemia caused by covering the carotid artery after the stent body is released is achieved, and the surgical wound surface is small.

The invention provides an adjustable bending hemostasis delivery sheath tube for aortic arch interventional therapy, the adjustable bending hemostasis delivery sheath tube comprises a catheter sheath and a control mechanism, the control mechanism comprises a base, a driving assembly and a locking assembly, the driving assembly comprises a driving ring rotatably mounted on the base and a transmission sliding block in threaded fit with the driving ring, and the transmission sliding block is in threaded fit with the driving ring. The transmission sliding block is fixedly connected with the near end of the adjusting wire and limited to axially slide relative to the base. The locking assembly is arranged between the base and the connecting part, the locking assembly comprises a clamping block arranged outside the adjusting wire in a sleeving mode and a sliding ring arranged outside the clamping block in an axially sliding and sleeving mode, and the adjusting wire can be locked extremely reliably through surrounding type friction force generated when the sliding ring extrudes the multiple elastic clamping arms.

A stent graft for deployment in the aortic arch including at least a proximal stent ring at the proximal end of the tubular graft material, at least one fenestration provided in a side wall of the tubular graft material, an internal branch disposed within the lumen of the stent graft and extending from the fenestration. A fenestration-supporting stent ring supports the fenestration between two struts and an apex of the fenestration supporting ring. The proximal stent ring has plurality of stent units including at least one scallop unit, at least one supporting unit, and at least one body unit. The proximal apex of each scallop unit is located at a laterally extending edge of the scallop in a first circumferential region and the proximal apex of each supporting unit is located a second circumferential region. The first and second struts of each of the at least one scallop unit are shorter than the first and second struts of each of the at least one supporting unit.

Improved systems including rBGCs improved by means of stiffness; working zones and optimized transition zones can traverse the aortic arch into the common carotid and vertebral arteries from a radial approach including navigation of tortuous and individuated anatomical challenges. Mechanical Thrombectomy improved by balloon occlusion prevents thrombus showers and follows 10 years of interventional cardiology and diagnostic use of improved radial approach (TRA) with better systems, making trans-femoral (TFA)less safe and effective than this revised treatment paradigm, unexpectedly better than literature predicted in early parts of the decade. Likewise, carotid stenting may be performed during these intracranial arterial occlusion procedures without swapping out guide catheters as required by the prior art.

The utility model provides an aortic arch covered stent in-situ fenestration internal bypass catheter which comprises a catheter body, a near-end developing structure and a far-end developing structure, and a main channel and a bypass channel which are isolated from each other are arranged in the catheter body; the main channel penetrates through the pipe body in the axial direction. The flow turning channel is located on one radial side of the main channel and comprises a near-end opening and a far-end opening which are formed in the side wall of the pipe body, and a flow channel communicating the near-end opening with the far-end opening; the near-end developing structure is arranged on the side wall of the tube body and surrounds the edge of the near-end opening; the far-end developing structure is arranged on the side wall of the tube body and surrounds the edge of the far-end opening; the near-end developing structure and the far-end developing structure are different in shape, a temporary channel of the aorta true cavity and the arch branch is established, and continuous blood perfusion is provided for the brain.

Deflection devices, systems, and methods for the prevention of stroke configured and negatively charged to filter emboli in the bloodstream and prevent advancement into the artery extending from the aortic arch. Devices may be formed as a single structure or a composite device. Additionally, a retrieval system is provided, including a sleeve catheter and a retrieval device slidably disposed therein, the retrieval device including one or more attachment portions configured to engage at least a portion of a device positioned within an artery extending from the aortic arch.

Embolic protection device for insertion into an aortic arch, with a filter unit, a frame and a feed unit, wherein the filter unit is arranged at the frame and the frame provides a proximal area having a proximal shape, which is arranged in an inner area of the frame and is connected to the feed unit, wherein the proximal shape has a first part and a second part, wherein the second part is formed at one end of the first part.

A catheter device for transvascular delivery of a medical device to a cardiac valve region of a patient comprises an elongate sheath with a first lumen, a distal end for positioning at a heart valve, a second lumen that extends parallel to or in the sheath, and an expandable embolic protection filter. The filter is arranged to extend from an orifice of the second lumen and, in the expanded, covers ostia of the side branch vessels in the aortic arch.

The utility model provides a covered stent and a release device thereof, and relates to the technical field of medical instruments. The covered stent comprises metal stent rings and a covering film, the multiple metal stent rings are sequentially arranged at intervals and all connected with the covering film, in the initial state, the covering film is in a bent state and is provided with a large bent side and a small bent side, and the distance between every two adjacent metal stent rings on the side of the large bent side is larger than the distance between every two adjacent metal stent rings on the side of the small bent side. The covering film can be reversely folded so that the large bent side can be converted into the small bent side, the covering film located on the side can be stacked, meanwhile, the small bent side can be converted into the large bent side, the covering film located on the side can be straightened, and under the structure, the displacement amount of the covered stent in the axial direction can be reduced, and the covering film can be folded in the reverse direction. According to the covered stent, the contact area of the metal stent ring and the inner surface of a blood vessel is guaranteed, so that the covered stent is prevented from being axially shortened after being implanted, meanwhile, the bent structure of the covered stent can guarantee that the covered stent has good adherence to the aortic arch, and the probability of adverse events such as internal leakage is reduced.