238 results about "Left auricle" patented technology

The invention discloses a method for quantitatively analyzing a left auricle occlusion effect based on a CT image. The method comprises the following steps: step 1, acquiring a heart CTA image; 2, performing three-dimensional reconstruction to obtain a heart three-dimensional image, and obtaining a left atrium three-dimensional image by using the left atrium segmentation model; 3, obtaining a left auricle occluder area by using the left auricle occluder segmentation model; 4, constructing a three-dimensional model of the left auricle occluder on the basis of the segmented left auricle occluder area so as to obtain a three-dimensional image of the left auricle occluder; 5, obtaining a three-dimensional plane of the left auricle plugging device, a front view of the plugging device and a left auricle opening plane; 6, left auricle occlusion postoperative evaluation parameters are extracted, wherein the parameters at least comprise the size, position and classification of residual shunt, the position of an occluder, the shoulder exposing position and height, the endothelialization degree of the occluder and the position of instrument-related thrombus; and 7, evaluating the left auricle occlusion effect according to the obtained evaluation parameters after the left auricle occlusion operation.

The invention discloses a left auricle plugging device provided with a real-time atrial pressure monitoring chip, and particularly relates to the technical field of left auricle plugging, the left auricle plugging device comprises a plugging device body and a connector, the top end of the connector is provided with a signal supply module, and the signal supply module is located in the plugging device body; according to the left atrial appendage plugging device, after the inductor in the nut generates a voltage signal, the signal can be transmitted to the low-noise operational amplifier and amplified, meanwhile, the electromagnetic interference between the noise of a circuit and the outside world is restrained, and the plugging device can be used for plugging the left atrial appendage of the left atrial appendage of the left atrial appendage. The physical deformation is converted into corresponding electric signals, the electric signals are transmitted to an in-vitro receiving terminal through an antenna, and a doctor can indirectly judge the recovery condition of the atrial contraction function of the patient according to the pressure signal trend.

A clip and method provide for surgically minimizing or eliminating an atrial appendage of the patient using a clip. The clip includes first and second elongate beam. The clip includes a dual side spring assembly configured to urge the first and the second elongate beams from an open V-shaped position to a parallel closed position. The dual side spring assembly includes a right-side spring and a left-side spring having first and second terminal ends attached to distal sections respectively of the first and the second elongate beams. The right and the left-side springs extend proximally to a respective proximal bend connected by a lateral element that maintains alignment to resist lateral splaying movement of the first and the second elongate beams.

The invention belongs to the technical field of interventional medical instruments and relates to a plugging device which comprises a fixing portion, a sealing portion and a connecting portion, the connecting portion is arranged between the fixing portion and the sealing portion, and a first connecting piece and a second connecting piece of the connecting portion are independently connected with the fixing portion and the sealing portion respectively. The plugging device comprises an initial state and an assembly state, and in the initial state, the first connecting piece and the second connecting piece are mutually independent; in an assembling state, the first connecting piece is connected with the second connecting piece so as to connect the fixing part and the sealing part; therefore, the sealing part and the fixing part can be packaged and produced independently, and can be assembled according to the required size when being implanted, so that the assembled left auricle plugging device has better adaptability and can also adapt to left auricle shapes with special sizes.

A clip may be configured to close the portion of the heart, to reduce blood flow therethrough as well as passage of clots or other undesired materials. The clip may be configured to close the left atrial appendage (LAA). The closure of the LAA may reduce the possibility of stroke or other maladies stemming from fluid flow with the LAA. Delivery systems may comprise expansion apparatuses for a left atrial appendage clip. The expansion apparatuses may include retention mechanisms for retaining the clip.

The left auricle plugging assembly comprises a first sheathing canal, a second sheathing canal and a plugging piece, and the first sheathing canal is used for conveying a bonding material to the bottom of a left auricle to form a bonding layer; the plugging piece is arranged in the second sheath tube, the plugging piece is pushed out from the far end of the second sheath tube through the push rod and released into the left auricle, so that the plugging piece is partially inserted into the bonding material at the bottom of the left auricle, and when the bonding material is cured to form a bonding layer, the bonding layer can lock the plugging piece; the plugging piece comprises a plugging head and a compressible plugging block, the plugging block is connected with the plugging head, and the plugging block can be compressed; the plugging head and the plugging block are coaxially arranged, the plugging head is connected with the plugging block, the plugging head is used for being inserted into the bonding material, and the plugging piece has a compressed state and a natural state. According to the left auricle plugging device, the plugging piece can be fixed in the left auricle so as to effectively plug the left auricle, after plugging, a cavity structure cannot be formed in the left auricle, the falling-off situation hardly occurs, and the operation effect is improved.

A left atrial appendage closure (LAAC) device is adapted for occluding a patient's left atrial appendage (LAA). The LAAC device includes a shape memory foam occlusive element that is adapted to expand from a crimped configuration for delivery to an expanded configuration after deployment, the shape memory foam occlusive element including in its expanded configuration a distal face, a proximal face and an intervening periphery. A reinforcing member is disposed relative to the shape memory foam occlusive element and is adapted to limit deformation of the shape memory foam occlusive element after the shape memory foam occlusive element has expanded into the expanded configuration.

The utility model provides a left auricle plugging device and a left auricle plugging system. The left atrial appendage occluder comprises a fixed disc; a plugging disc; the universal joint assembly is connected with the fixing disc and the plugging disc so that the plugging disc can rotate in a universal mode relative to the fixing disc. The universal joint assembly comprises a limiting piece and a universal joint component, the limiting piece is provided with a containing cavity, a universal structure is arranged at the first end of the universal joint component, the universal structure is movably arranged in the containing cavity, and the universal structure and the limiting piece form a limiting stop. Wherein the limiting piece comprises a plurality of connecting sections, the connecting sections are sequentially welded end to end to define a containing cavity, and clamping structures matched with each other are arranged on the connecting end faces of every two adjacent connecting sections. The left atrial appendage plugging device solves the problem that in the prior art, a left atrial appendage plugging device is poor in applicability.

The invention belongs to the technical field of medical instruments, and relates to a traction device of a degradable left atrial appendage occluder, which comprises a body, a display unit for displaying a traction signal and a fixing assembly are arranged on the body, and the fixing assembly is slidably connected with the body through a conversion assembly. The conversion assembly is used for converting the moving signal of the fixing assembly into a display signal which can be displayed on the display unit; one end of the conveying steel cable is connected with the fixing assembly, and the other end of the conveying steel cable is connected with the left auricle plugging device; according to the degradable left atrial appendage occluder, the fixing assembly is slidably connected with the body, so that external traction force of the degradable left atrial appendage occluder can be buffered, the pulling force of the body cannot directly act on the conveying steel cable, and the operation experience of a user is improved; meanwhile, the traction force of the fixing assembly is converted into a visual signal through the conversion assembly, an operator can conveniently apply the traction force more visually, and the risk that the plugging device is displaced and disengaged due to the fact that the traction force is too large is reduced.

The invention discloses a left atrial appendage occlusion simulation method and system based on a CT image, and the method comprises the steps: reading CT image data of a patient, segmenting a left atrium and a left atrial appendage from the CT image data, and obtaining corresponding binary three-dimensional image data; reading a left auricle opening mark point set by a user, and calculating geometric parameters of the left auricle opening in combination with the binary three-dimensional image data; reading the opening of the inferior vena cava set by the user and another arbitrary point on the inferior vena cava, calculating the optimal atrial septum puncture site and the rotation angle of the left auricle occluder conveying sheath after entering the left atrium, calculating the corresponding conveying sheath movement track curve, and outputting or visualizing the calculation result. By utilizing the embodiment of the invention, more accurate left atrial appendage parameter acquisition, surgical path planning and three-dimensional simulation of the surgical process under the three-dimensional condition can be realized, and a doctor is helped to evaluate the surgical process before the surgery.

The present application relates to an occlusion device comprising a fixing portion and a sealing portion. The fixing portion comprises at least one support member. The occlusion device has an initial state and an assembled state. In the initial state, a first connection portion and a second connection portion are separated from each other. In the assembled state, the first connection portion is connected to the second connection portion to connect the fixing portion and the sealing portion. Therefore, the sealing portion and the fixing portion can be relatively independently packaged and produced, and assembled according to required dimensions when implantation is needed. Thus, the assembled left atrial appendage occlusion device exhibits relatively good adaptability and can also adapt to left atrial appendages with special shapes.

The present invention provides a left atrial appendage occlusion device, which includes an occlusion member, an ablation member connected to the occlusion member, and a mapping member. The occlusion member is used to be fixed at the opening of the left atrial appendage, the ablation member is used to transmit ablation energy to ablate the target tissue area in the left atrial appendage, and the mapping member is used to receive electrophysiological signals to map the target tissue area. The left atrial appendage occlusion device can not only occlude the opening of the left atrial appendage, but also control the ablation member to ablate the target tissue area in the left atrial appendage, and the mapping member can map the electrical signals in the left atrial appendage to ensure that a complete ablation area of ​​at least one circle is formed near the opening of the left atrial appendage to achieve a complete electrical isolation treatment effect.

A clip may be configured to close a portion of a heart to reduce blood flow therethrough and passage of clots or other undesirable materials. The clip may be configured to close a left atrial appendage (LAA). The closure of the LAA may reduce the likelihood of stroke or other disease caused by fluid flow with the LAA.

The utility model discloses a left atrial appendage occluder conveying sheathing canal shaping device which comprises heating plates which are oppositely arranged, a bent section shaping block and a straight section shaping block which are sequentially arranged between the plate faces of the heating plates in the shaping direction of a conveying sheathing canal, and shaping grooves are correspondingly formed in the bent section shaping block and the straight section shaping block. A shaping area of the conveying sheath tube is positioned through the shaping groove, an angle shaping block for shaping and fixing the torsion angle of the end of the conveying sheath tube relative to the straight section is arranged on the straight section shaping block, and the angle shaping block and the straight section shaping block are connected in a rotating fit mode and are rotationally positioned through an arranged angle limiting mechanism. According to the utility model, through the modular design, the shaping part for conveying the sheathing canal is separately and independently designed, a user can flexibly adjust the angle according to the requirements of different patients, and the complex operation of needing various sheathing canals is avoided, so that the left auricle anatomical structure of different patients can be adapted, and the requirements on various sheathing canals are reduced.

The utility model discloses a left atrial appendage occluder, which relates to the technical field of medical instruments and comprises an anchoring disc and an occluding disc, the anchoring disc is provided with a first central shaft, the occluding disc is provided with a second central shaft, and the first central shaft and the second central shaft are arranged in a staggered manner. The occluder is positioned at a target position, such as a left atrial appendage, through the anchoring disc, and the left atrial appendage is occluded through the occluding disc. The central axis of the anchoring disc and the central axis of the plugging disc are arranged in a staggered mode, and the better plugging effect is achieved especially for the case that an outlet of the left auricle is eccentric relative to an outlet channel.

An occlusive device for the left atrial appendage is plastically deformable and biodegradable.

A left atrial appendage closure (LAAC) device is adapted to pull a left atrial appendage (LAA) closed on itself. The LAAC device includes a central hub and a plurality of engagement arms that are coupled to the central hub. At least some of the plurality of engagement arms include a tissue engaging region having one or more hooks that extend in a first circumferential direction. A drive mechanism is engaged with the central hub and is adapted to rotate the central hub in the first circumferential direction.

An occlusion device with particular utility in occlusion of left atrial appendages is described. The occlusion device embodiments utilize an inflatable balloon or expandable element used to occlude the treatment site.

A shunt device is configured to be implanted at a site of an elongated shunt opening in a tissue wall between a left atrial appendage (LAA) and a great cardiac vein (GCV) of a human heart. The shunt device includes a body portion through which a flow path extends, one or more anchoring portions connected to the body portion, and an elongated flow path opening configured to align with the elongated shunt opening in the tissue wall to permit blood to flow from the LAA into the GCV through the shunt device along the flow path.

Medical devices, systems and methods for occluding a left atrial appendage of a heart with an implantable medical device and three-dimensional imaging. In one embodiment, the imaging is facilitated with a controller coupled to one or more magnetic field generators and a display, the one or more magnetic field generators configured to generate a magnetic field within the anatomy of a patient and the display provides the imaging and display information thereon. The medical system also includes a medical device delivery system for delivering the implantable medical device. The medical device includes one or more magnetic field location sensors therewith that are operatively coupled to the controller. With this arrangement, the sensors are sized and configured to facilitate providing the three-dimensional imaging within the heart that is viewable on the display to assist a physician to safely and effectively implant the medical device.

An implantable medical device, such as, but not limited to, a left atrial appendage occlusion (LAAC) device, includes an expandable frame movable between a collapsed configuration for delivery and an expanded configuration for deployment, the expandable frame including a proximal portion, a distal portion, and an intermediate portion. The expandable frame includes a plurality of anchors extending around an outer periphery of the expandable frame. A primary cover extends over the proximal portion of the expandable frame and may interact with the plurality of anchors. A secondary cover extends over a portion of the expandable frame.

The invention discloses a segmented plug type left auricle plugging device, a left auricle plugging system and a using method thereof.The segmented plug type left auricle plugging device comprises an inner plug structure and an outer plug structure which are connected through a connecting structure, and the inner plug structure and the outer plug structure are each of a net-shaped plug body structure capable of entering a left auricle to be fixed; the inner plug structure can limit and fix the plugging device, a flow blocking film is arranged on the outer plug structure, and anchoring structures are arranged on the periphery of the inner plug structure and the periphery of the outer plug structure. According to the segmented plug type left atrial appendage plugging device, the inner plug structure and the outer plug structure are arranged in a segmented mode, double plugs are matched for plugging and positioning, the mutual supporting effect is achieved in the releasing process, particularly, in the releasing process of the outer plug structure, the outer plug structure is supported by the inner plug structure, the position of the outer plug structure is adjusted, and the plugging effect is good. Therefore, a better plugging effect is achieved, overturning is avoided, and the success rate of an operation is increased.

The invention provides an atrial appendage clamp and a ligation system. The auricle clamp comprises a transmission assembly and a clamping assembly. The clamping assembly is installed at the far end of the transmission assembly and comprises a clamping jaw and two clamping pieces. The side, facing the other clamping piece, of each clamping piece is provided with a clamping face, and the clamping face comprises a plurality of protrusions arranged at intervals. When the transmission assembly moves, the clamping jaws are linked to conduct clamping, so that the multiple protrusions on each clamping face abut against the multiple protrusions on the other clamping face in a one-to-one mode. By means of the design that the protrusions on the clamping faces abut against each other correspondingly in the clamping state, the clamping stability can be guaranteed on the premise that auricle tissue is protected from being damaged by clamping, and the left auricle ligation clamp is suitable for the scene of an interventional left auricle ligation operation.

The invention relates to the technical field of medical treatment, and discloses a construction method of a left auricle hemodynamics simulation system, which comprises the following core steps of: firstly, acquiring noninvasive transthoracic echocardiography and cardiac enhancement CT (Computed Tomography) image data of a patient; secondly, through an image fusion technology, an accurate left auricle three-dimensional geometric structure model is constructed; and finally, on the basis of the model, carrying out hemodynamic simulation on the left atrium and the left auricle by utilizing a CFD (Computational Fluid Dynamics) technology, and accurately calculating hemodynamic parameters such as the blood flow velocity at the opening of the left auricle. The method has the advantages that the blood flow state of the left atrial appendage is evaluated completely, noninvasively, accurately and quantitatively, and traditional invasive transesophageal ultrasonic examination can be effectively replaced. According to the method, the comfort level of the patient and the examination safety are remarkably improved, operation related risks are avoided, meanwhile, the screening feasibility and efficiency are improved, and the method has important value for clinical management of the stroke risk of the atrial fibrillation patient.

This invention relates to a left atrial appendage occlusion device, comprising an occlusion disc, a connecting mechanism, and a filling module. The occlusion disc is connected to the filling module via the connecting mechanism. The filling module includes at least one filling unit, and all the filling units are connected in series. The filling module is used to fill the entire interior of the left atrial appendage. By setting the occlusion disc and the filling module, the number and size of the filling units in the filling module can be customized according to the shape of the lesion in the left atrial appendage, so as to better fill the lesion space and achieve the effect of occlusion of the left atrial appendage in conjunction with the occlusion disc. By setting polyurethane foam in the occlusion disc, thrombus formation and occlusion can be quickly achieved and the endothelialization process can be accelerated. At the same time, the filling unit made of polyurethane foam can also accelerate the closure of the entire chamber.

A guide catheter that is adapted to accommodate a left atrial appendage closure (LAAC) device being advanced towards a left atrial appendage (LAA) includes an elongate shaft extending from a proximal region to a distal region and a guide catheter hub that is coupled to the proximal region of the elongate shaft. The guide catheter hub includes a hub body, a Tuohy seal disposed relative to the hub body, a flat seal disposed relative to the hub body, and a mechanism disposed relative to the hub body that is adapted to releasably open the flat seal.

The application discloses a plugging device and relates to the technical field of medical devices. The plugging device comprises a plugging body, an elastic connecting piece and a hanging component. The plugging body is adapted to the shape of a target plugging area. One end of the elastic connecting piece is arranged on the plugging body. One end of the hanging component is connected with the other end of the elastic connecting piece, and the hanging component is adapted to be hung on the tissue of the target plugging area. The plugging device for cauliflower-shaped left atrial appendages is made of degradable materials, can be implanted into the left atrial appendages of a patient through a minimally invasive catheter intervention operation to realize plugging of the left atrial appendages, can guide the climbing of the endothelial tissue in the left atrium, and can realize complete degradation of the device in the human body after endothelialization. Finally, the plugging effect is realized by the patient's autologous tissue, the formation and shedding of thrombus embolus in the left atrial appendages are effectively prevented, and the risk of stroke is greatly reduced.

The present application relates to a left atrial appendage occluder, comprising: an expandable frame transitionable between a compressed state and an expanded state; a covering membrane arranged along at least part of the outer surface of the expandable frame; a connecting structure arranged at the proximal end of the expandable frame and being connectable to and disconnectable from a conveying system; and an anticoagulant coating arranged only on at least part of the outer surface of the covering membrane. The present application can reduce the risk of thrombus formation on the surface of the left atrial appendage occluder and accelerate the endothelialization process.

Embodiments of the present invention provide an improved vascular occlusion device for occlusion of a passageway, cavity, or the like. According to one embodiment, a medical device for occluding a left atrial appendage is provided. The medical device includes a first portion having at least one plane of occlusion that is configured to be positioned outside of the left atrial appendage, and a second portion having at least one plane of occlusion that is configured to be at least partially positioned within a cavity defined by the left atrial appendage.

The present invention discloses a delivery handle and delivery system for a left atrial appendage occluder, wherein the delivery handle comprises a proximal handle and a distal handle which are socketed and can rotate and slide relative to each other, the proximal handle is connected to the proximal end of the left atrial appendage occluder through a proximal cable, the distal handle is connected to the distal end of the left atrial appendage occluder through a distal cable, at least one of the proximal handle and the distal handle is provided with an identification portion for characterizing the relative displacement of the proximal handle and the distal handle; and also comprises a locking mechanism for locking or unlocking the proximal handle and the distal handle. The above-mentioned delivery handle and delivery system can better meet the installation and delivery requirements of a left atrial appendage occluder controlled by dual cables, and can realize the unlocking and locking of the proximal handle and the distal handle, and can reduce the difficulty of operation.