110 results about "Third aortic arch" patented technology

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.

Disclosed herein are representative embodiments of methods, apparatus, and systems used to deliver a prosthetic heart valve to a deficient valve. In one embodiment, for instance, a support structure and an expandable prosthetic valve are advanced through the aortic arch of a patient using a delivery system. The support structure is delivered to a position on or adjacent to the surface of the outflow side of the aortic valve (the support structure defining a support-structure interior). The expandable prosthetic valve is delivered into the aortic valve and into the support-structure interior. The expandable prosthetic heart valve is expanded while the expandable prosthetic heart valve is in the support-structure interior and while the support structure is at the position on or adjacent to the surface of the outflow side of the aortic valve, thereby causing one or more native leaflets of the aortic valve to be frictionally secured between the support structure and the expanded prosthetic heart valve.

The invention discloses a traditional Chinese medicine composition with an effect of improving artery blood vessel plaque and a preparation method and application thereof, and belongs to the technical field of traditional Chinese medicine. The technical problem to be solved is to provide a traditional Chinese medicine composition capable of improving vascular plaques such as carotid artery, aortic arch, brachial trunk, subclavian artery and the like aiming at the current situation that adverse reactions exist when statin lipid-lowering drugs and antiplatelet drugs are taken for a long time to treat artery vascular plaques. According to the technical scheme, the traditional Chinese medicine composition with the effect of improving the artery blood vessel plaque is characterized by comprising radix puerariae, red yeast rice, folium cortex eucommiae, hippophae rhamnoides leaves and natto.

The utility model relates to an intravascular stent, a stent system and a windowing area adjusting method, a stent body section is provided with a stent body inner cavity with two through ends, a branch window penetrating through the stent body inner cavity is formed in the side wall of the stent body section, and the branch window is located on the side wall of the first end of the stent body section and formed to the end side of the first end of the stent body section; the pipe body section is provided with a pipe body inner cavity with two through ends, and one end part of the pipe body section is connected with the second end part of the frame body section, so that the pipe body inner cavity is communicated with the frame body inner cavity. The branch windows of the two intravascular stents can be spliced into a complete closed window, and the overlapped length of the two intravascular stents can be adjusted to adapt to the actual sizes of the three branches on the arch to construct a windowing area with a proper size, so that the blood supply of the three branches on the arch is ensured. When the stent is used for interventional operation, in-vitro windowing or in-situ windowing is not needed, and when the stent is used for open operation, the number of anastomotic stomas can be reduced, the circulation stopping time can be shortened, and meanwhile the three-branch anatomical structure on the arch can be reserved. Therefore, the existing operation requirements are met.

The present invention provides an individualized thoracic aortic stent system. The individualized thoracic aortic stent system includes an aortic arch stent and an ascending aortic stent. The anchoring area of the aortic arch stent is spliced and implanted into the ascending aortic stent, and the anchoring area of the ascending aortic stent is used as the anchoring area of the system. A first branch hole is pre-opened in the area of the aortic arch stent for connecting a branch stent, and the opening areas of the second branch hole and the third branch hole are locked with the first branch hole as a reference point, and the second branch hole and the third branch hole are opened in the opening areas. A movable, deformable or special-shaped framework structure is arranged in the opening area of the aortic arch stent. Through the splicing between the aortic arch stent and the ascending aortic stent, the anchoring area of the aortic arch stent is arranged in the ascending aortic arch stent, and the anchoring area of the ascending aortic stent is used as the anchoring area of the system, so that the anchoring area is moved forward to avoid the vascular branch fork, enabling the system to adapt to individuals who were previously unsuitable for anchoring.

A branch stent comprises a skirt stent and a tubular stent, and the skirt stent is connected to the proximal end of the tubular stent; the skirt support comprises a skirt supporting framework; the skirt supporting framework comprises a supporting layer and a reinforcing layer which are connected, the supporting layer is connected with the proximal end of the tubular stent and extends outwards from the tube wall of the tubular stent, the end, away from the tubular stent, of the supporting layer is bent inwards to form the reinforcing layer, and the reinforcing layer comprises a plurality of free ends. The skirt support of the branch support is high in stability, and blood leakage at the joint of the branch support and the aortic arch is effectively avoided.

Implant devices for hypertension and methods of treatment are provided. Implant devices are configured for placement in a target region of an aortic arch of the patient, thereby engaging arterial walls in the target region sufficiently to stretch and / or tension arterial walls, thereby inducing the baroreflex response. Such implants can include one or more expandable structures configured to engage an elongated target region in the aortic arch. The target region can extend along a majority of the aortic arch including a cylindrical segment of aortic arch between the left common carotid artery and the left subclavian artery. An elongated target zone can further extend at least between the brachiocephalic artery takeoff and the left subclavian artery takeoff. Such embodiments can utilize one or more expandable structures with a non-circular cross-section that stretch and reshape the arterial walls to induce tension in the arterial walls, thereby generating a robust baroreflex response.

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.

The utility model discloses an aortic arch support which comprises a body, the body is arranged to be in a pre-bending shape, a concave portion is arranged on the body, and a first branch pipe, a second branch pipe and a third branch pipe which are matched with an aortic arch are arranged on the concave portion. The first branch pipe, the second branch pipe and the third branch pipe all protrude out of the surface of the body; according to the aortic arch support, a gap can be formed between the concave part and the aortic wall, the aortic arch support is suitable for most branch variation situations, and the phenomenon that the inner diameter of the aortic trunk is reduced cannot occur; besides, the contact area of the branch blood vessel and the main blood vessel can be increased, and the contact area is changed into a surface from a point, so that the phenomenon of internal leakage is well avoided; and the aortic arch stent is integrally designed, so that the integrity of the whole stent does not need to be damaged in an operation, and the risk is low.

Disclosed are methods and devices for isolating all three of the left subclavian, left common carotid and brachiocephalic arteries from embolic debris that might flow through the aortic arch, via a single access point. A system may include an elongate flexible tubular sheath, having a proximal end and a distal end, and an inner member extending through the sheath and moveable relative to the sheath. A left subclavian element may be supported by the inner member. A filter membrane may be configured to isolate the aorta from the brachiocephalic, left common carotid and left subclavian arteries when the left subclavian element is expanded within the left subclavian artery and the sheath is retracted to expose the membrane. The left subclavian element may include a self expandable frame, which may carry a left subclavian filter.

System, devices and methods for providing a blood-free operative region for aortic arch repair procedures. Various embodiments disclose occlusion of the descending aorta, the innominate artery, the left carotid artery and the left subclavian artery while also providing sufficient perfusion distal of the occluding balloons. Various embodiments disclose performing aortic arch repair procedures while the patient's body temperature is maintained an normothermia (about 36 degrees C to about 37.5 degrees C). Other embodiments disclose performing aortic arch repair procedures while the patient's body temperature is maintained at slight hypothermia (about 30 degrees C to about 34 degrees C).

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.

An aortic arch brachial artery vascular stent belongs to medical consumables and is a covered stent, including a main stent and two branch stents. One end of the two branch stents is embedded in the front end of the main stent. The front end of the main stent is provided as a connector connected to the branch stent. One end of the connector is an integrated structure with the main stent, and the other end is closed and provided with a skirt extending outward. Two through holes arranged in parallel are provided in the skirt. One end of the branch stent is a connecting end, which passes through the through hole of the skirt and goes deep into the connecting end of the main stent. A limiting structure is provided at the connecting end of the branch stent. The present invention is novel in concept and ingenious in design. When applied to the innominate artery of the aortic arch, it can effectively reduce the difficulty of surgical placement of the covered stent, shorten the operation time, and improve the success rate.

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.

System, devices and methods for providing a blood-free operative region for aortic arch repair procedures. Various embodiments disclose occlusion of the descending aorta, the innominate artery, the left carotid artery and the left subclavian artery while also providing sufficient perfusion distal of the occluding balloons. Various embodiments disclose performing aortic arch repair procedures while the patient's body temperature is maintained an normothermia (about 36 degrees C. to about 37.5 degrees C.). Other embodiments disclose performing aortic arch repair procedures while the patient's body temperature is maintained at slight hypothermia (about 30 degrees C. to about 34 degrees C.).

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 invention relates to an aortic dissection blocking membrane (10) comprising a blocking membrane arranged to be placed in a false lumen of an aortic arch (1) associated with an aortic dissection, wherein the blocking membrane is arranged to provide a blockage to the free flow of blood in the false lumen by being foldable and / or by comprising a plurality of protrusions (11). The invention further relates to an aortic dissection system for treating blood flow within a false lumen of an aortic arch (1) associated with an aortic dissection.

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.

This application provides a method and system for in vivo stent orientation based on the principle of spatial reversal, relating to the field of vascular interventional technology. The method includes: during the advancement of a main stent delivery system carrying an integrated branch stent along an ultra-rigid guidewire towards the aortic arch, acquiring the orientation information of the delivery system and its contact force information with the vessel wall; then comparing the orientation information with a spatial reference path, and determining the entry point into the curved section of the aortic arch based on the comparison results; generating a reversal speed adjustment amount based on the deviation of the delivery system's orientation from the branch vessel opening direction, the vessel curvature, and the contact force information; finally, controlling the delivery system to rotate synchronously during advancement based on this adjustment amount, gradually adjusting the orientation of the branch stent from a preset position to directly facing the opening of the left subclavian artery, while dynamically adjusting the advancement speed according to the contact force information to maintain the contact force within a preset safe range. This application improves the accuracy and operational safety of in vivo stent orientation.

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