151 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 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.

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.

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.

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.

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.

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 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.

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.

The utility model provides a left auricle plugging device and a left auricle plugging device. The left atrial appendage occluder comprises a fixed disc; the first end of the plugging disc is provided with a first connecting piece, the first connecting piece is provided with a first threaded section, the second end of the plugging disc is provided with a second connecting piece, the second connecting piece is provided with a second threaded section and used for being in threaded connection with a conveying steel cable of the left auricle plugging device, and the first threaded section and the second threaded section are opposite in rotating direction; the two ends of the adjusting piece are connected with the fixing disc and the plugging disc respectively, a first connecting part is arranged at the end, close to the plugging disc, of the adjusting piece, and the first connecting part is provided with a third threaded section, so that the adjusting piece is in threaded connection with the first connecting piece through the first threaded section and the third threaded section. 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 relates to a novel multivalent atrial appendage occluder of hybrid design based on two different atrial appendage occluders, one having a proximal disk-shaped cover and a second version without a proximal cover. The two occluder variants each provide relevant application solutions by themselves. The invention further relates to multiple specified, universal devices composed of predominantly rotationally symmetrical individual parts for producing these different LAA occluders (LAA=Left Atrial Appendage) which are graded in different sizes, for the interventional, catheter-based closure of the left atrial appendage. Axially and radially oriented hooks support the secure and gentle anchoring of the occluders 1 in the retaining area of the atrial appendage 26. As a result, the use of substantially smaller access ports in the interventional application is possible. The two atrial appendage occluder variants, with and without proximal cover 14, can be inserted using the same controllable access port and can be implanted in various sizes individually or in combination with one another and likewise as a hybrid variant of two occluders, one without a proximal cover (14) and one subsequently with a proximal cover (14) in one and the same atrial appendage (24) as shown in FIG. 17. The two atrial appendage occluder variants can each be released during the implantation phase in three stages until they are fully unfolded.

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.

The invention provides a method for screening left atrial appendage thrombus by using a multi-mode ultrasonic technology, and relates to the technical field of medical ultrasonic diagnosis. According to the method for screening the left atrial appendage thrombus by using the multi-mode ultrasonic technology, through a layered screening process of noninvasive primary screening, precise secondary screening and comprehensive judgment, the technical advantages of four complementary modes of transthoracic ultrasound (TTE), transesophageal ultrasound (TEE), ultrasonic contrast (CEUS) and shear wave elastography (SWE) are integrated, primary risk stratification is completed by using noninvasive TTE, and secondary risk stratification is completed by using noninvasive TTE; tEE is combined with CEUS and SWE to achieve multi-dimensional evaluation of the structure, the blood flow and the hardness of the thrombus for high-risk groups, and finally accurate detection and stability evaluation of the thrombus are achieved based on the judgment standard of multi-modal data fusion. According to the method, the detection rate of the left auricle thrombus can be remarkably increased, the unnecessary invasive operation risk is reduced, meanwhile, thrombus stability basis is provided for formulating a clinical anticoagulation treatment scheme, and the method is suitable for conventional screening of thrombus high-risk groups such as atrial fibrillation and the like.

The invention discloses a conveying assembly and a left atrial appendage occluder system. The conveying assembly comprises a conveying catheter and a pushing mechanism suitable for passing through the conveying catheter. The pushing mechanism comprises a pushing catheter and a pre-release part penetrating through the pushing catheter, the far end of the pushing catheter and the far end of the pre-release part are provided with a first connecting structure and a second connecting structure respectively, the near end of the second connecting structure is detachably connected with the first connecting structure, and the far end of the second connecting structure is detachably connected with the left auricle plugging device. An operator can stably push the left auricle plugging device to a target position through the pushing mechanism; after a target position is reached, the second connecting structure is separated from the first connecting structure, the pushing mechanism pre-releases the left auricle plugging device, and an operator can visually observe the implantation state of the left auricle plugging device; if the implantation state does not reach the standard, the pre-release part is controlled to recycle the left auricle plugging device for pre-release again until the implantation state reaches the standard; after the standard is reached, the second connecting structure is separated from the left auricle plugging device, and the left auricle plugging device is released, so that the effectiveness and the safety of the operation are improved.

A system for occluding a patient's left atrial appendage (LAA) includes an expandable frame and one or more expandable elements. The expandable frame is moveable from a collapsed delivery configuration to an expanded deployment configuration in which the expandable frame is adapted to span across at least a portion of the LAA, the expandable frame defining an LAA volume distal of the expandable frame once deployed. The one or more expandable elements are adapted to be deployed behind the expandable frame in order to fill at least part of the LAA volume distal of the expandable frame, each of the one or more expandable elements adapted to expand subsequent to delivery.

The present application relates to the technical field of left atrial appendage occlusion by intervention, and discloses a left atrial appendage occlusion device, which comprises an occlusion component and a fixing component, the occlusion component comprises an elastic net-like braided body structure which has a proximal end face and a distal end face, the occlusion component is connected with the fixing component on the side of the distal end face, the occlusion component further comprises a flow blocking film arranged in the elastic net-like braided body structure, the flow blocking film is configured to cover the distal end face or the proximal end face in the radial direction and is fixed along the circumferential direction of the elastic net-like braided body structure, and the flow blocking film is further pulled and limited by a pulling piece leading to the fixing component, so that the occlusion efficiency of the left atrial appendage occlusion device is enhanced.

1. The name of the design product: left atrial appendage occluder. 2. The use of the design product: for left atrial appendage occlusion. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: design 1 perspective view 1. 5. Other circumstances that need to be explained: specify design 1 as the basic design.

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.

1. The name of the design product: left atrial appendage occluder (two). 2. The use of the design product: for left atrial appendage occlusion. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: design 1 perspective view. 5. The right view is symmetrical with the left view, and the right view is omitted; the rear view is symmetrical with the front view, and the rear view is omitted. 6. Design 1 is designated as the basic design.

The invention discloses an auricular appendage clip and a special conveying device, and relates to the technical field of auricular appendage clip conveying devices. The auricle clamp comprises a pair of clamping arms and an elastic connecting part connected with the clamping arms, at least three connecting blocks are arranged on the auricle clamp, and the at least three connecting blocks are arranged on the clamping arms and / or the elastic connecting part respectively; a connecting groove is formed in each connecting block; and a hanging lug is arranged in each connecting groove. The special conveying device comprises a clamp body mechanism and an operating handle, the far end of the clamp body mechanism is provided with a pair of clamp arms capable of being controlled by the operating handle to be opened and closed, the tail ends of the two clamp arms are provided with at least three positioning pins, and the tail end of each positioning pin is provided with a hanging lug buckle used for being connected with a hanging lug in a connecting groove of the auricle clamp in a clamped mode. According to the conveying device and the auricular appendage clip, conveying and separable releasing of the auricular appendage clip are achieved in the mode that the positioning pin and the connecting groove are mechanically inserted and matched, operation is easy and safe, and the operation time is short.

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.