CN113057708A - Left auricle plugging device - Google Patents
Left auricle plugging device Download PDFInfo
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- CN113057708A CN113057708A CN202110447440.1A CN202110447440A CN113057708A CN 113057708 A CN113057708 A CN 113057708A CN 202110447440 A CN202110447440 A CN 202110447440A CN 113057708 A CN113057708 A CN 113057708A
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- atrial appendage
- left atrial
- occlusion device
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- filter
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- A61B17/12131—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device
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Abstract
The invention discloses a left atrial appendage occlusion device, comprising: a delivery catheter; the suction catheter is arranged in the delivery catheter, one end of the suction catheter is connected with a suction port, and the suction port can be attached to the left atrial wall to form an airtight channel; one end of the suction port is provided with a fastener which is used for ligating the left auricle; a support frame which can be released and retracted is arranged in the suction catheter and is used for supporting the left auricle; the supporting filter is sleeved at the proximal end of the supporting frame and is a mesh support which can radially collapse, and the supporting filter is used for supporting the inner wall of the left auricle and can capture thrombus. The left auricle is invaginated by the support frame matched with the suction device, the support frame can generate self-adaptive change according to the shape of the inner side wall of the left auricle at the release position, and the inner wall of the left auricle is ensured to orderly collapse and enter the left atrium in a predetermined mode in the process of applying suction pressure. The use of a support filter facilitates the capture of thrombus trapped therein during withdrawal of the scaffold.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a left atrial appendage occlusion device.
Background
Worldwide, 3300 million people suffer from stroke each year, 20% of which are caused by non-valvular atrial fibrillation (NVAF), a life-threatening arrhythmia disease. Under the sinus rhythm of normal people, the left auricle has normal contractility and rarely forms thrombus, and when the atrial fibrillation, the left auricle is obviously enlarged and loses effective regular contraction, so that blood is deposited on the left auricle, and thrombus is easily formed. 90% of patients with non-valvular atrial fibrillation have had strokes that result from these thrombi traveling with the blood through the aorta to the brain.
Anticoagulation therapy is currently the standard method for preventing atrial fibrillation stroke complications, but anticoagulation therapy has certain limitations, for example, some patients cannot be anticoagulated due to anticoagulation contraindication or relative contraindication, or the anticoagulation agent is easily affected by drugs and foods, so that detection trouble is increased, and some patients cannot persist in anticoagulation therapy for a long time. In addition, anticoagulant therapy itself has bleeding complications that reduce the long-term anticoagulation rate of patients and limit the effectiveness of anticoagulant therapy.
Cardiac surgery to simultaneously excise or ligate the closed left atrial appendage is straightforward, and thus many physicians claim that for such patients, surgical treatment of the heart to simultaneously excise or ligate the closed left atrial appendage is required. However, the surgical trauma is large for the left atrial appendage to be closed by merely cutting or ligating, and surgical procedures are not readily available. Odell (Odall) and the like report the technology for preventing atrial fibrillation embolism by closing the left auricle through a thoracoscope in 1996, and the thoracoscope closing of the left auricle is widely concerned due to the fact that the trauma and the risk of the operation are greatly reduced. However, when the thoracoscopic closed left atrial appendage operation is performed, an incision is still needed to be made in the thoracic cavity, and the wound is large.
The interventional left atrial appendage occlusion is a novel method for non-drug prevention of thromboembolism of patients with atrial fibrillation, the action principle is that an occluder is delivered into the left atrial appendage through a catheter through a blood vessel, the blood flow of the left atrial appendage and the left atrium is blocked by the occluder, meanwhile, thrombus generated by the left atrial appendage is prevented from entering the atrium, and after a period of time, the surface of the occluder is endothelialized, so that the problem that thrombus of the left atrial appendage enters the left atrium is solved, and the risk of stroke occurrence is reduced. Because the inner wall of the left auricle is attached with abundant pectinate muscles and musculature trabeculae, the inner wall is thin, the left auricle of different crowds has different depths, most of the left auricle is in a non-circular flat structure, and the left auricle and the inner cavity of the left auricle form a certain bending angle. Due to the complex structure of the left atrial appendage, it is difficult to completely seal it with the currently marketed devices, and blood clots may leak from the gap between the device and the left atrial appendage to the brain. Another risk with these devices is that thromboembolism associated with the devices may form as a result of foreign implants remaining in the heart, and some implanted occlusion devices also present a risk of falling out after implantation into the body, constituting a significant safety hazard.
In view of this, need to improve current left atrial appendage plugging device urgently, guarantee that the shutoff is respond well, little and do not have the risk of droing to the patient injury.
Disclosure of Invention
The invention discloses a left auricle plugging device, which is used for solving the problems that the left auricle plugging device in the prior art is difficult to completely plug the left auricle and the plugging device has the risk of falling off.
In order to solve the problems, the invention adopts the following technical scheme:
there is provided a left atrial appendage occlusion device comprising:
a delivery catheter for introduction into the human body through a blood vessel;
a suction catheter arranged in the delivery catheter, wherein one end of the suction catheter is connected with a suction port, and the suction port can be attached to the wall of the left atrium to form an airtight channel;
the suction port is provided with a fastener at one end far away from the suction catheter, and the fastener is used for ligating the left auricle;
a support frame which can be released and retracted is arranged in the suction catheter and is used for supporting the left auricle;
the supporting filter is sleeved at the proximal end of the supporting frame and is a mesh support capable of collapsing radially, and the supporting filter is used for supporting the inner wall of the left auricle and capturing thrombus.
In the above scheme, the support frame is from gathering together the state and becoming the state of expansion after the suction catheter releases, just the support frame can take place adaptability deformation when supporting the left atrial appendage, after the expansion the support frame can with the inside wall laminating of left atrial appendage.
In the above scheme, the support frame includes a central shaft and a plurality of connecting rods, the connecting rods extend from the central shaft radially outwardly.
In the above scheme, the connecting rod includes first branch, second branch and third branch, first branch with the center pin is connected, the second branch with first branch is connected, the third branch with the second branch is connected, two first branch and two the second branch constitutes the quadrangle, third branch is kept away from the one end of center pin is crooked.
In the above scheme, the support filter includes a plurality of elastic rods, and a plurality of elastic rods radially extend outwards and surround to form the support filter, the bottom of the support filter has a through hole, and the support filter is provided with a first film.
In the above aspect, the support frame and the support filter are capable of moving in the axial direction, respectively.
In the above scheme, a first guide piece is arranged in the suction duct and connected with the support frame for releasing and recovering the support frame; and a second guide part is also arranged in the first guide part and is connected with the supporting filter for releasing and recovering the supporting filter.
In the above scheme, the suction port is of a net structure, the periphery of the suction port is provided with a second film, and the suction port can be accommodated in the delivery catheter in a radially collapsible manner.
In the above aspect, an end of the suction port remote from the delivery catheter is flared.
In the above aspect, the fastener includes an elastic collar and a holding member, and the elastic collar is releasably disposed on the suction port by the holding member.
In the above aspect, the elastic collar includes a suture thread, an engaging element and a plurality of locking elements, the engaging element is disposed at one end of the suture thread, the locking elements are uniformly distributed on the suture thread, and each locking element is configured to pass through the engaging element and to be fixed in a snap fit manner.
In the above aspect, the engagement element is a ring or a sleeve.
In the above aspect, the locking element includes a first end portion and a second end portion, the first end portion has a size smaller than that of the second end portion, and the first end portion and the second end portion are capable of sequentially passing through the engaging element.
In the above aspect, the suture thread is provided with a breaking point portion for separating the suture thread portion after the fastener ligates the left atrial appendage.
In the above aspect, a cutting device is provided in the delivery catheter.
The technical scheme adopted by the invention can achieve the following beneficial effects:
(1) the support frame is matched with the suction device to enable the left auricle to be partially sunken, has excellent shape adaptability, can generate self-adaptive change according to the specific anatomical shape of the inner side wall of the left auricle at the release position, enables the support frame to fully contact the far-end inner wall of the left auricle, is suitable for the left auricle with shallow mouth or multi-blade anatomical shape, and accordingly ensures that the inner wall of the left auricle orderly collapses and enters the left atrium in a preset mode in the process of applying suction pressure.
(2) The fastener adopts ligature formula fastening can effectively prevent that the fastener from droing, and fastening effect is good, all can use to the left auricle of different shapes, and application scope is wide.
(3) The support frame is also provided with a support filter, which is beneficial to capturing thrombus trapped in the support frame by utilizing the support filter in the process of withdrawing the support frame, and improves the effectiveness and safety of left atrial appendage plugging.
(4) Through the axial displacement of first guide piece and second guide piece control support frame and support filter respectively, when getting into left auricle, the support frame increases with the support filter interval, withdraws the support frame and supports the filter time interval and reduce, is favorable to the guide thrombus of catching to get into the bottom of supporting the filter, and it is better to catch the effect, and the safety in utilization of device obtains promoting.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below to form a part of the present invention, and the exemplary embodiments and the description thereof illustrate the present invention and do not constitute a limitation of the present invention. In the drawings:
fig. 1 is a schematic view of a left atrial appendage occlusion device as disclosed in example 1 of the present disclosure;
fig. 2 is a schematic view of a support frame of the left atrial appendage occlusion device disclosed in embodiment 1 of the present invention;
figure 3 is a front view of a support filter of the left atrial appendage occlusion device disclosed in example 1 of the present disclosure;
figure 4 is a top view of a support filter of the left atrial appendage occlusion device disclosed in example 1 herein;
figure 5 is a schematic view of an elastic loop of a left atrial appendage occlusion device as disclosed in another preferred embodiment of the present invention;
figure 6 is a schematic illustration of a delivery catheter of a left atrial appendage occlusion device as disclosed in another preferred embodiment of the present invention;
fig. 7 is a schematic view of the left atrial appendage occlusion device disclosed in embodiment 1 of the present invention being placed in a left atrial appendage;
figure 8 is a schematic view of a left atrial appendage when the left atrial appendage occlusion device disclosed in example 1 of the present disclosure is in use;
fig. 9 is a schematic view of the left atrial appendage after ligation as disclosed in example 1 herein;
figure 10 is a schematic view of a left atrial appendage occlusion device as disclosed in example 2 of the present invention;
fig. 11 is a schematic view of the left atrial appendage occlusion device disclosed in embodiment 2 of the present invention being placed in a left atrial appendage;
figure 12 is a schematic view of a left atrial appendage when the left atrial appendage occlusion device disclosed in example 2 of the present disclosure is in use;
figure 13 is a schematic illustration of the retraction of the support frame and support filter in the left atrial appendage occlusion device disclosed in example 2 herein.
The following reference signs are specifically included:
a suction catheter-10; left atrial appendage-20; a support frame-30; fastener-40; a delivery catheter-50; a support filter-60; a suction port-11; a central shaft-31; a first strut-32; a second strut-33; a third strut-34; a first guide-35; an elastic ferrule-41; a cutting device-51; a first film-61; second guide-62 suture-411; a coupling element-412; a locking element-413; breakpoint portion-414.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1, 7 and 8, the present invention provides a left atrial appendage occlusion device comprising:
a delivery catheter 50 for introduction into the human body through a blood vessel; the suction catheter 10 is arranged in the delivery catheter 50, one end of the suction catheter 10 is connected with the suction port 11, and the suction port 11 can be attached to the left atrial wall to form an airtight channel; the suction port 11 is provided with a fastener 40 at an end remote from the suction catheter 10, the fastener 40 being used to ligate the left atrial appendage 20. Be equipped with the support frame 30 that can release and retrieve in the suction catheter 10, support frame 30 is used for supporting left atrial appendage 20, and support frame 30 becomes the state of expanding from gathering together the state after suction catheter 10 releases, and support frame 30 can take place adaptability deformation when supporting left atrial appendage 20, and support frame 30 after the expansion can be laminated with the inside wall of left atrial appendage 20. The support frame 30 is arranged to support the left auricle 20, the left auricle 20 does not need to be completely sucked and invaginated into the left atrium, the suction time is short, and the left auricle support frame is suitable for left auricles with different shapes. The support filter 60 is sleeved on the central shaft 31 of the support frame 30, and the support filter 60 can support the inner wall of the left atrial appendage 20 and capture thrombus. Can prevent thrombus inside the left atrial appendage 20 from entering the left atrium during device operation, and is beneficial to capture the thrombus trapped in the left atrial appendage by using the support filter 60 during the process of withdrawing the support frame 30, thereby improving the effectiveness and safety of left atrial appendage occlusion.
A first guide 35 is provided in the suction catheter 10 to connect with the holding frame 30 for releasing and retrieving the holding frame 30.
Specifically, the support frame 30 extends into the left atrium through the suction port 11 and expands to a predetermined shape to effectively support the wall of the left atrial appendage. Thus, when pressure is applied to the left atrial appendage 20 by the suction device, the portion of the left atrial appendage wall distal to the left atrial appendage 20 that is supported by the support frame 30 does not immediately collapse into the left atrium, tissue distal to the left atrial appendage 20 that is unsupported and tissue proximate to the left atrial appendage opening preferentially collapse, and tissue proximate to the left atrial appendage 20 opening preferentially invaginates into the left atrium, and subsequently more of the left atrial appendage tissue is orderly invaginated during withdrawal of the support frame 30 by operation of the first guide 35.
The support frame 30 has excellent form adaptability and can be adaptively changed according to the specific anatomical form of the specific inner side wall of the left atrial appendage 20 at the release position, so that the support frame 30 can be fully contacted with the inner wall of the left atrial appendage, and is particularly suitable for the left atrial appendage with a shallow mouth or multi-lobe anatomical form, thereby ensuring that the inner wall of the left atrial appendage orderly collapses and enters into the left atrium in a preset mode during the application of suction pressure.
As shown in fig. 2, the support frame 30 includes a central shaft 31 and a plurality of connecting rods divergently extending from the central shaft 31 in a radial direction.
Specifically, the connecting rod comprises a first supporting rod 32, a second supporting rod 33 and a third supporting rod 34, the first supporting rod 32 is connected with the central shaft 31, the second supporting rod 33 is connected with the first supporting rod 32, the third supporting rod 34 is connected with the second supporting rod 33, the two first supporting rods 32 and the two second supporting rods 33 form a quadrangle, so that the supporting frame 30 can be extended along the length direction of the suction catheter 10 or expanded along the radial direction of the suction catheter 10, the supporting frame 30 can be retracted into the suction catheter 10, and the supporting frame can be expanded to a diameter larger than the diameter of the suction catheter after being released. The end of the third strut 34 remote from the central axis 31 is bent and the tip is curled inwards to form a generally petal-shaped three-dimensional structure. The joint part of the left auricle 20 and the supporting frame 30 is a curved surface, so as to avoid the contact between the tip and the left auricle 20. The first strut 32, the second strut 33 and the third strut 34 are all formed by integrally laser cutting and heat treatment sizing medical metal pipes with elasticity and shape memory characteristics.
Preferably, the flexibility of the first strut 32 is greater than or equal to that of the second strut 33, the flexibility of the second strut 33 is greater than that of the third strut 34, and by such arrangement, the whole support frame 30 has both high flexibility and high resilience, can adapt to left atrial appendage lumens of different anatomical forms, and has excellent form adaptability. When the left auricle is subjected to suction pressure applied to the inner cavity of the left auricle, the sequence of adaptive deformation of each part of the supporting frame 30 is as follows: the first struts 32, the second struts 33 and the third struts 34 make the tissue near the opening of the left atrial appendage 20 preferentially collapse into the left atrium, and prevent the tissue on the inner wall of the left atrial appendage 20 from collapsing into the left atrium in an disordered manner, which affects the closing effect of the left atrial appendage 20.
As shown in fig. 3 and 4, the support filter 60 is provided: the middle of supporting the filter 60 is provided with a through hole, a plurality of elastic rods radially extend outwards through the through hole and surround to form the supporting filter 60, and the supporting filter 60 is provided with a first film 61 and the periphery of the first film can be attached to the inner wall of the left atrial appendage 20. First film 61 is the permeable membrane of gas, can filter the blood interception thrombus in the left auricle, all is suitable for and has guaranteed the filter effect to the left auricle 20 of different shapes.
The suction port 11 is provided with a second membrane for the periphery of the mesh structure and is arranged: may extend out of the delivery catheter 50 or retract back into the delivery catheter 50. The second membrane has good sealing performance and ensures that the suction port 11 can be attached to the left atrial wall to form an airtight channel.
In the preferred embodiment, the suction port 11 is flared away from the suction catheter 10. Facilitating engagement to the left atrial wall around the opening of the left atrial appendage 20.
Preferably, the fastening member 40 includes an elastic collar 41 and a holding member (not shown in the drawings), by which the elastic collar 41 is releasably disposed on the suction port 11. After the retaining element releases the elastic collar 41, the elastic collar 41 is radially reduced and thickened, enabling fastening to the invaginated left atrial appendage tissue.
The use method of the left atrial appendage occlusion device provided by the embodiment is as follows:
the delivery catheter 50 is introduced into the human body through the blood vessel until reaching the left atrium, the suction catheter 10 is extended from the delivery catheter 50, the suction port 11 is extended from the suction catheter 10 and is jointed to the left atrial wall around the opening of the left atrial appendage 20, the support frame 30 and the support filter 60 are extended from the suction port 11, the suction device starts to suck, the left atrial appendage 20 is sunken by the contour of the support frame 30, the support frame 30 and the support filter 60 are withdrawn into the delivery catheter 50, the retaining elements on the fastening members 40 are released, the elastic ferrule 41 is sleeved on the sunken left atrial appendage and becomes smaller in the radial direction under the action of elastic deformation recovery, and the left atrial appendage 20 is tightly ligated. The suction port 11 is withdrawn into the delivery catheter 50 and the delivery catheter 50 is then removed from the body, as shown in fig. 9, completing the occlusion procedure of the left atrial appendage.
In another preferred embodiment, as shown in fig. 5, the elastic collar 41 comprises a suture 411, an engaging element 412 and a locking element 413, the engaging element 412 is arranged at one end of the suture 411, the locking element 413 is arranged in a plurality and uniformly distributed on the suture 411, and each locking element 413 can pass through the engaging element 412 under the action of pulling force and is clamped and fixed.
Preferably, this embodiment, the suture 411 has elasticity. Has good ligation and fastening effects. The engagement element 412 is a ring or sleeve. The locking element 413 comprises a first end portion having a smaller size than a second end portion, which in turn can pass through the engaging element. The locking element 413 is arranged in a truncated cone shape or a conical shape. The locking element 413 can be easily passed through the engaging element 412 and can be prevented from being separated after the locking element 413 passes through the engaging element 412, i.e. the tightening process of the elastic collar 41 is irreversible and prevents falling out.
In this embodiment, it is preferable that the suture thread 411 is provided with a breaking point 414 for separating an excess portion of the suture thread 411 after the left atrial appendage 20 is ligated by the fastening member 40. And the excess suture 411 is withdrawn from the body to avoid excessive suture 411 remaining in the body. No other devices are needed for cutting again, and the operation is convenient.
Specifically, after the left atrial appendage 20 has been aspirated, the support frame 30 and support filter 60 are withdrawn into the delivery catheter 50, the retaining elements on the fastener 40 are released, the elastic collar 41 is fitted over the recessed left atrial appendage, the suture 411 is pulled, and the locking element 413 is snapped into place through the engagement element 412, completing the fastening and ligation of the left atrial appendage. The excess suture 411 is separated by the breakpoint, the suture 411, the suction port 11 are sequentially withdrawn into the delivery catheter 50, and then the delivery catheter 50 is removed from the body, completing the occlusion procedure of the left atrial appendage.
In another preferred embodiment, as shown in fig. 6, a cutting device 51 is provided within the delivery catheter 50 for severing the suture 411. The broken point part of the sewing thread 411 is prevented from being accidentally broken during fastening, so that the sewing machine is safer.
Specifically, after the elastic loop 41 fastens and ties the left atrial appendage 20, the suture 411 is pulled at the cutting device 51, and the cutting device 51 cuts the excess suture 411.
Example 2
As shown in fig. 10, unlike embodiment 1, a second guide member 62 is further provided in this embodiment, which is connected to the support filter 60, for releasing and recovering the support filter 60. The second guide member 62 is disposed in the first guide member 35 and can control axial movement of the support frame 30 and the support filter 60, respectively.
As shown in fig. 11, when entering the left atrial appendage 20, the distance between the support frame 30 and the support filter 60 is increased, and in the process of suction, thrombus in the left atrial appendage 20 can be sucked into the support filter, and because the distance between the support frame 30 and the support filter 60 is large, whether the thrombus completely falls into the support filter 60 is easier to observe, and the situation that the thrombus falls on the support frame 30 and cannot be captured is avoided.
As shown in fig. 12, the reduced spacing between the support frame 30 and the support filter 60 after capturing the thrombus facilitates aspiration of the left atrial appendage 20 to allow more invagination of the distal end of the left atrial appendage 20 into the left atrium.
As shown in fig. 13, after the suction is completed, the first guiding member 35 firstly controls the supporting frame 30 to retract, and then the first guiding member 35 and the second guiding member respectively control the supporting frame 30 and the supporting filter 60 to retract together, because the thrombus falls into the bottom of the supporting filter, and simultaneously because the supporting frame 30 retracts and the supporting filter 60 form a mutual clamping effect, the effect of the thrombus is better when the thrombus is retracted, the thrombus can be effectively prevented from accidentally falling off and entering the left atrium, the distance between the supporting frame 30 and the supporting filter 60 can be adjusted according to the shape of the left atrial appendage 20, the operation is more flexible, the use effect is better, and the use safety of the device is improved.
The invention has the following advantages:
(1) the support frame is matched with the suction device to enable the left auricle to be partially sunken, has excellent shape adaptability, can generate self-adaptive change according to the specific anatomical shape of the inner side wall of the left auricle at the release position, enables the support frame to fully contact the far-end inner wall of the left auricle, is suitable for the left auricle with shallow mouth or multi-blade anatomical shape, and accordingly ensures that the inner wall of the left auricle orderly collapses and enters the left atrium in a preset mode in the process of applying suction pressure.
(2) The fastener adopts ligature formula fastening can effectively prevent that the fastener from droing, and fastening effect is good, all can use to the left auricle of different shapes, and application scope is wide.
(3) The support frame is also provided with a support filter, which is beneficial to capturing thrombus trapped in the support frame by utilizing the support filter in the process of withdrawing the support frame, and improves the effectiveness and safety of left atrial appendage plugging.
(4) Through the axial displacement of first guide piece and second guide piece control support frame and support filter respectively, when getting into left auricle, the support frame increases with the support filter interval, withdraws the support frame and supports the filter time interval and reduce, is favorable to the guide thrombus of catching to get into the bottom of supporting the filter, and it is better to catch the effect, and the safety in utilization of device obtains promoting.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (15)
1. A left atrial appendage occlusion device, comprising:
a delivery catheter for introduction into the human body through a blood vessel;
a suction catheter arranged in the delivery catheter, wherein one end of the suction catheter is connected with a suction port, and the suction port can be attached to the wall of the left atrium to form an airtight channel;
the suction port is provided with a fastener at one end far away from the suction catheter, and the fastener is used for ligating the left auricle;
a support frame which can be released and retracted is arranged in the suction catheter and is used for supporting the left auricle;
the supporting filter is sleeved at the proximal end of the supporting frame and is a mesh support capable of collapsing radially, and the supporting filter is used for supporting the inner wall of the left auricle and capturing thrombus.
2. The left atrial appendage occlusion device of claim 1, wherein the support frame changes from a collapsed state to an expanded state after release from the suction catheter, and wherein the support frame is capable of undergoing adaptive deformation when supporting the left atrial appendage, the expanded support frame being capable of conforming to an inner sidewall of the left atrial appendage.
3. The left atrial appendage occlusion device of claim 1, wherein the support frame comprises a central shaft and a plurality of connecting rods extending radially outwardly from the central shaft.
4. The left atrial appendage occlusion device of claim 3, wherein the connecting rod comprises a first strut, a second strut, and a third strut, the first strut is connected to the central shaft, the second strut is connected to the first strut, the third strut is connected to the second strut, two of the first struts and two of the second struts form a quadrilateral, and an end of the third strut distal from the central shaft is curved.
5. The left atrial appendage occlusion device of claim 1, wherein the support filter comprises a plurality of resilient rods extending radially outward and surrounding the support filter, the support filter having a bottom with a through hole, the support filter having a first membrane disposed thereon.
6. The left atrial appendage occlusion device of claim 1, wherein the scaffolding and the support filter are each axially movable.
7. A left atrial appendage occlusion device as in claim 6, wherein a first guide is provided within the aspiration catheter to connect with the scaffolding for release and retrieval of the scaffolding; and a second guide part is also arranged in the first guide part and is connected with the supporting filter for releasing and recovering the supporting filter.
8. The left atrial appendage occlusion device of claim 1, wherein the suction port is a mesh structure having a second membrane disposed about an outer periphery thereof and adapted to be radially collapsed for receipt within the delivery catheter.
9. A left atrial appendage occlusion device as in claim 8, wherein an end of the suction port distal to the delivery catheter is flared.
10. A left atrial appendage occlusion device as in any of claims 1-9, wherein the fastener comprises an elastic collar and a retention element, the elastic collar being releasably disposable on the suction port via the retention element.
11. The left atrial appendage closure device of claim 10, wherein the elastic loop comprises a suture, an engagement element disposed at one end of the suture, and a plurality of locking elements uniformly distributed over the suture, each locking element configured to pass through the engagement element and snap fit.
12. The left atrial appendage occlusion device of claim 11, wherein the engagement element is a ring or a sleeve.
13. The left atrial appendage occlusion device of claim 11, wherein the locking element comprises a first end and a second end, the first end having a size that is smaller than a size of the second end, the first end and the second end being sequentially passable through the engagement element.
14. A left atrial appendage occlusion device as in claim 11, wherein the suture is provided with a break point for separating portions of the suture after the fastener ligates the left atrial appendage.
15. A left atrial appendage occlusion device as in claim 10, wherein a resection device is disposed within the delivery catheter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110447440.1A CN113057708A (en) | 2021-04-25 | 2021-04-25 | Left auricle plugging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110447440.1A CN113057708A (en) | 2021-04-25 | 2021-04-25 | Left auricle plugging device |
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| Publication Number | Publication Date |
|---|---|
| CN113057708A true CN113057708A (en) | 2021-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110447440.1A Pending CN113057708A (en) | 2021-04-25 | 2021-04-25 | Left auricle plugging device |
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| CN (1) | CN113057708A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114027913A (en) * | 2021-12-07 | 2022-02-11 | 云南省阜外心血管病医院 | Adsorption type left auricle external ring ligation system for cardiac surgery |
| EP4356847A1 (en) * | 2022-10-17 | 2024-04-24 | Biotronik Ag | Endovascular catheter system for inversion of the laa, particularly for resection of the laa |
-
2021
- 2021-04-25 CN CN202110447440.1A patent/CN113057708A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114027913A (en) * | 2021-12-07 | 2022-02-11 | 云南省阜外心血管病医院 | Adsorption type left auricle external ring ligation system for cardiac surgery |
| CN114027913B (en) * | 2021-12-07 | 2024-04-19 | 云南省阜外心血管病医院 | Left auricle and heart external cerclage system for adsorption type cardiac surgery |
| EP4356847A1 (en) * | 2022-10-17 | 2024-04-24 | Biotronik Ag | Endovascular catheter system for inversion of the laa, particularly for resection of the laa |
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