76 results about "Left auricle" patented technology

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 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 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.

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.

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.

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.

This invention provides a system and method for determining the specifications of a left atrial appendage closure device based on two-dimensional (2D) intracardiac echocardiography (ICE). [Solution] In imaging procedures, 2D-ICE is used to acquire images of the patient's left atrium. A model of the left atrium is generated from the images of the left atrium. The model of the left atrium is used to validate subsequent imaging of the patient's left atrial appendage. Anatomical measurements from the validated subsequent imaging are used to select or identify a left atrial appendage closure device, for example, for the treatment of atrial fibrillation patients.

An occlusive medical implant for implantation within a left atrial appendage may include an expandable framework configured to self-expand from a collapsed configuration to an expanded configuration, and an occlusive element disposed on a proximal portion of the expandable framework. At least a portion of the expandable framework may be mechanically expandable from the expanded configuration to a securement configuration. When the occlusive medical implant is disposed within the left atrial appendage, the expandable framework exerts a first radial force on the left atrial appendage in the expanded configuration and the expandable framework exerts a second radial force on the left atrial appendage in the securement configuration. The second radial force is greater than the first radial force.

Left atrial appendage occlusion device specifications from 2D ICE for use in the treatment of atrial fibrillation patients. Systems and methods for left atrial appendage occlusion device specification from two-dimensional (2D) intracardiac echo imaging (ICE). In the imaging procedure, the 2D ICE is used to acquire an image of the patient's left atrium. A model of the left atrium is generated from the image of the left atrium. The model of the left atrium is used to validate subsequent imaging of the left atrial appendage of the patient. Anatomical measurements from validated subsequent imaging may be used to select or specify a left atrial appendage occlusion device in order, for example, to treat atrial fibrillation patients.

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.

Medical devices, systems and methods for occluding a left atrial appendage of a heart with an implant are provided. In one embodiment, a medical device system includes a sheath for delivering the implant. The sheath includes, at a distal portion of the sheath, first and second deflectable portions that are each independently deflectable relative to first and second pivot locations, respectively. With this arrangement, at least one of the first and second pivot locations are adjustable along a longitudinal length of the distal portion of the sheath.

The utility model relates to the technical field of medical instruments, and particularly discloses a left auricle plugging device which comprises a left auricle plugging device body, the back face of the left auricle plugging device body is fixedly connected with an adjusting cavity, a positioning rod penetrates through the interior of a short rod, a spring buckle is arranged in the positioning rod, and the left auricle plugging device body is fixedly connected with the adjusting cavity. A movable rod is hinged to the surface of the first movable clamp, two first compression springs are fixedly connected to the inner top wall and the inner bottom wall of the adjusting cavity correspondingly, empty grooves are formed in the two sides of the inner side wall of the adjusting cavity correspondingly, a pushing ball is rotationally connected to the bottom end of a pushing rod, and two sliding blocks are slidably connected to the inner side wall of the adjusting cavity; the top end of the vertical rod is fixedly connected with a clamping hook; according to the left auricle plugging device, the adjusting cavity, the clamping hook, the positioning rod, the spring buckle and the lower pressing plate are used in a matched mode, so that the left auricle plugging device body can be stably fixed to the inner wall of a left auricle of a patient, the dislocation situation in the daily use process is avoided, and therefore the follow-up operation situation is increased.

This invention relates to a tissue closure clip, the clip body of which includes a first clamping arm, a second clamping arm, and a curved arm connecting the proximal ends of the two; the first clamping arm and the second clamping arm both extend longitudinally between the first and second clamping arms and contact each other, wherein the first clamping arm includes a first connecting portion disposed between its proximal and distal ends for connecting the distal end of the first clamping arm, and the second clamping arm includes a second connecting portion disposed between its proximal and distal ends for connecting the distal end of the second clamping arm. The tissue closure clip is carefully optimized in terms of size, has a wider range of applicability, and can be delivered to the ideal clamping position at the root of the left atrial appendage in more or even all patients, providing balanced and complete clamping and closure of the left atrial appendage, thereby improving the success rate of the surgery and reducing patient discomfort.

The application relates to a left auricle occluder, which comprises an occlusion stent, the occlusion stent comprises a net stent body and a tail connected with the stent body, the stent body has a skirt at a distal end, the skirt comprises a plurality of circumferentially connected grids, and the heights of at least two grids in the skirt are different; the tail comprises a plurality of circumferentially arranged ribs, one end of each rib is connected with the skirt, and the other end of each rib is folded into a blunt shape, and at least part of the grids in the skirt are connected with at least two ribs in this way, so that the damage of the distal end of the occlusion stent to tissues is reduced, and the mutual nesting or winding problems of the distal end of the occlusion stent are avoided.

A medical system can include a left atrial appendage closure device including an expandable frame configured to transition between a collapsed delivery configuration and an expanded deployed configuration and a proximal hub disposed along a central longitudinal axis of the expandable frame; wherein the left atrial appendage closure device includes a sensor disposed at least partially within an interior of the expandable frame and axially movable relative to the proximal hub; wherein the proximal hub includes a first threaded connection structure; and a delivery catheter including a core wire extending axially within a lumen of the delivery catheter, the core wire having a second threaded connection structure at a distal end thereof, the second threaded connection structure configured to releasably engage with the first threaded connection structure in an unreleased configuration and the second threaded connection structure disengaged from the first threaded connection structure in a released configuration.

A left atrial appendage closure (LAAC) device includes a distal plate having a central aperture and a plurality of tine engagement regions that are circumferentially disposed about a periphery of the distal plate. An expandable frame extends between a proximal region and a distal region. The distal region includes a plurality of tines that each include an engagement end that is adapted to engage a corresponding one of the plurality of tine engagement regions such that the tines are prevented from moving within a plane extending through and parallel with the distal plate. A connection assembly is adapted to prevent the engagement ends of each of the tines from moving orthogonally to the plane extending through the distal plate.

This invention discloses a left atrial appendage closure device, belonging to the field of medical devices. The left atrial appendage closure device of this invention includes a delivery catheter, a support tube, a support plate, a telescopic support rod, a closure clamp assembly, and a control cable. The closure clamp is inserted into the opening of the left atrial appendage via the delivery catheter and is opened at the opening of the left atrial appendage through the cooperation of the telescopic support rod and the control cable. A puncture hook inside the closure clamp pierces the tissue wall of the left atrial appendage opening to achieve closure. Finally, the closure clamp closes the left atrial appendage opening using a straight "I" closure mechanism. Compared with existing left atrial appendage occluders, the puncture hook on the outer periphery of the closure clamp can radially pierce the tissue, and the closure clamp drives the closure of the left atrial appendage opening, making the connection between the closure clamp and the left atrial appendage more secure and less prone to detachment. It also eliminates the problem of decreased reliability of the left atrial appendage seal due to loosening or movement, ensuring the long-term effectiveness of left atrial appendage closure and reducing complications caused by detachment and unreliable sealing.

The invention provides a left atrial appendage image measurement method and system, electronic equipment and a storage medium, and relates to the technical field of left atrial appendage image measurement. The image measurement method comprises the following steps: transforming three-dimensional heart image data according to a spatial position transformation relationship to determine transformed three-dimensional heart image data; transforming the transformed three-dimensional heart image data according to the left auricle motion change function to determine four-dimensional heart image data; and analyzing the four-dimensional heart image data based on a preset AI algorithm to determine a target dynamic parameter of the left auricle in the heartbeat cycle. Based on the spatial position transformation relation and the left auricle motion change function, the dynamic parameter change curve of the left auricle in the whole heartbeat cycle (including the systolic period and the diastolic period) is introduced, and dynamic change information of the left auricle form in the heartbeat cycle is provided, so that the image measurement of the left auricle is more reliable and stable, and the measurement accuracy is improved. And the measurement accuracy is improved.

The application discloses a left atrial appendage ablation device and a control method, and relates to the field of medical instruments.The device comprises a closure device for being placed at a left atrial appendage opening, a first conductive part is arranged on the closure device, and the first conductive part is used for transmitting first ablation energy to tissue; a conveyor is used for conveying the closure device, the conveyor comprises a support capable of relatively moving relative to the closure device, a second conductive part is arranged on the support, and the second conductive part is used for transmitting second ablation energy to tissue; and the first ablation energy and the second ablation energy are opposite in polarity. By using the application, one-stop treatment of ablation function and closure function can be realized.

A medical system may include a left atrial appendage closure device including an expandable framework and a proximal hub disposed along a central longitudinal axis of the expandable framework, the expandable framework being configured to shift between a collapsed delivery configuration and an expanded deployed configuration; wherein the left atrial appendage closure device includes a sensor at least partially disposed within an interior of the expandable framework and axially movable relative to the proximal hub; wherein the proximal hub includes a first threaded connection structure; and a delivery catheter including a core wire extending axially within a lumen of the delivery catheter, the core wire having a second threaded connection structure at a distal end thereof configured to releasably engage the first threaded connection structure in an unreleased configuration and the second threaded connection structure is disengaged from the first threaded connection structure in a released configuration.

The present application relates to a left atrial appendage closure device comprising: a frame; a film disposed along at least a portion of an outer surface of the frame; the anti-coagulation composite coating is arranged on at least one part of the outer surface of the covering film; the anticoagulant composite coating comprises a first bonding layer and a second anticoagulant layer which are arranged from inside to outside in the thickness direction of the covering film, and the first bonding layer comprises an amphiphilic polymer. Through the configuration, the risk that thrombus is formed on the surface of the instrument can be reduced, the endothelialization process is accelerated, meanwhile, the firmness of the whole coating is improved, the risk that the coating falls off is reduced, and the long-term anticoagulation effect can be kept.

Atrial appendage occlusion devices and cardiac monitoring positioned within the left atrial appendage and / or left atrium. In some embodiments the devices include an anchoring portion adapted to anchor the device in place adjacent the left atrial appendage, the anchoring portion comprising distal deformable anchoring portion adapted to be deployed in the left atrial appendage and a proximal deformable anchoring portion being adapted to be deployed in the left atrium, a barrier element secured to the anchoring portion and adapted to cover the left atrial appendage when implanted, and adapted to prevent blood clots from passing through the barrier element, and a cardiac monitoring element secured to at least one of the anchoring portions, the monitoring element including one or more sensors within in the left atrial appendage and / or left atrium and adapted to monitor left atrial cardiac data.

A left atrial appendage (LAA) ligation device is adapted for ligating the LAA via a trans-septal approach, the LAA including an ostium. The LAA ligation device includes a spiral ligation element extending from an end point disposed at a periphery of the spiral ligation element to a center point of the spiral ligation element, the spiral ligation element having a diameter defined by the periphery and a length defined between the periphery and the center point. A delivery device is adapted to releasably secure the spiral ligation element and to enable rotation of the spiral ligation device.

A left atrial appendage closure (LAAC) device includes a distal plate having a central aperture and a plurality of tine engagement regions that are circumferentially disposed about a periphery of the distal plate. An expandable frame extends between a proximal region and a distal region. The distal region includes a plurality of tines that each include an engagement end that is adapted to engage a corresponding one of the plurality of tine engagement regions such that the tines are prevented from moving within a plane extending through and parallel with the distal plate. A connection assembly is adapted to prevent the engagement ends of each of the tines from moving orthogonally to the plane extending through the distal plate.

The application discloses a left auricle plugging device distal end necking auxiliary device and a necking method, which comprises a base, a guide lining core, a guide sleeve, a first necking sleeve, a second necking sleeve and a mounting sleeve, an inner ring for supporting the inner periphery of a support rod of the left auricle plugging device is arranged on the first necking sleeve, a positioning ring for positioning the support rod is arranged on the second necking sleeve, and an outer ring for fixing the outer periphery of the support rod is arranged on the mounting sleeve; the inner ring, the positioning ring and the outer ring are in the same radial direction, and a positioning groove corresponding to the support rod is arranged on the positioning ring; the first necking sleeve, the second necking sleeve and the mounting sleeve are cooperated, the inner ring, the positioning ring and the outer ring are fixed, the necking device is not limited by the structure of the left auricle plugging device, has universality, and the assembly mode that pipelines are directly sleeved can simplify operation steps and improve necking efficiency.

One method involves using a processor to identify the septum and left atrial appendage (LAA) of a patient's heart in an anatomical diagram of at least a portion of the heart. An access surface is defined on the anatomical diagram through which a medical device engages with the LAA, the device to be delivered via a sheath penetrating the septum. The normal to the access surface is calculated. Multiple curves are calculated, each curve having (i) an end tangent to the normal, (ii) a second end contacting the septum, and (iii) conforming to specific mechanical properties of the sheath. Multiple candidate locations on the septum are derived from these curves for transseptal puncture using the sheath. These multiple candidate locations are presented to a user.

The method, device and application of left atrial partitioning can realize the geographic calibration of electrophysiological analysis, achieve 100% repeatability, and easily perform independent in-depth analysis of each subregion of the left atrium, realizing the regional and refined depiction of the atrial fibrillation matrix. The method includes: (1) importing high-density mapping point cloud data exported from mainstream electrophysiological systems, including electrical parameters such as X, Y, Z coordinates, voltage, and activation time; (2) identifying key feature structures in the point cloud data, including the boundaries of the left pulmonary vein ablation circle, the right pulmonary vein ablation circle, the mitral valve annulus region, and the left atrial appendage region, and using these as the basic anchor points for partitioning; (3) constructing three-dimensional spatial geometric rules to unambiguously assign each data point to one of the anatomical regions; (4) outputting a new point cloud dataset with clear regional labels and generating statistical reports for each partition, or visually displaying three-dimensional models of partitions with different color codes.