CN213406442U

CN213406442U - Supporting device for treating aortic valve prolapse

Info

Publication number: CN213406442U
Application number: CN202022248717.1U
Authority: CN
Inventors: 刘锦阳; 彭博; 王强; 卢江; 王忠明
Original assignee: Fuwai Yunnan Cardiovascular Hospital
Current assignee: Fuwai Yunnan Cardiovascular Hospital
Priority date: 2020-10-11
Filing date: 2020-10-11
Publication date: 2021-06-11
Anticipated expiration: 2030-10-11

Abstract

The utility model relates to the cardiovascular medical field, in particular to a supporting device for treating aortic valve prolapse, which comprises a bracket for being placed in the left ventricular outflow tract and a fixing part connected with the bracket and used for positioning the bracket at the left ventricular outflow tract; the support is a communicated structure which is communicated along the blood flow direction, and the upper end surface of the support is provided with a supporting part which is used for contacting the bottom end of the aortic valve and supporting the aortic valve. The utility model discloses be favorable to recovering the function of prolapsed aortic valve effectively under the prerequisite that reduces the wound. Compared with the existing valve replacement operation or aortic valve shaping operation, the implementation of the utility model is beneficial to effectively recovering the function of prolapsed aortic valve under the premise of reducing trauma, and simultaneously, the utility model also improves the operation safety and the operation efficiency and reduces the treatment cost; the utility model meets the social needs, has strong practicability and is favorable for promoting the further development of cardiovascular medical treatment technology.

Description

Supporting device for treating aortic valve prolapse

Technical Field

The utility model relates to a cardiovascular medical treatment field especially relates to a strutting arrangement for be used for treating aortic valve prolapse.

Background

Heart valves are either between the atria and ventricles or between the ventricles and the arteries, and play a key role in the blood circulation activity of the heart which is never stopped, preventing the backflow of blood in the atria (atrioventricular valve) or ventricles (semilunar valve) that have just left. The aortic valve, which is located between the left ventricle and the aorta, is generally composed of three semilunar valves, with the leaflet attachment edge crossing the ventricular-arterial junction in an arc; when the ventricle contracts, the blood flow rushes upwards to push the aortic valve leaflet away from the center of the aortic cavity; when the ventricle relaxes, the valve leaf falls into the center of the aorta cavity passively; when the valve is properly configured, the three leaflets coapt along the commissure edges and support the column of blood in the aorta to prevent regurgitation into the ventricle.

Aortic Valve Prolapse (AVP) refers to the prolapse of one or more aortic valve leaflets into the Left Ventricular Outflow Tract (LVOT) at late diastole, with or without Aortic Insufficiency (AI); after 1 Marfan's syndrome AI caused by AVP is discovered by Haseby in 1958 necropsy, the reports of AVP caused by other reasons are increasing day by day; echocardiography (UCG), particularly cross-sectional UCG, has led to an increase in the detection rate of AVP and has been considered to be one of the important causes of AI.

Aortic valve insufficiency and regurgitation caused by aortic valve prolapse cause increased pulse pressure difference, coronary insufficiency, left ventricular preload increase, left ventricular dilatation and heart failure, which are absolute indications of surgical operations; at present, the surgical operation widely adopts valve replacement (replacing biological valve or mechanical valve) for treatment, patients face risks of open chest surgery and postoperative anticoagulation, or aortic valve forming surgery is adopted for treatment (patent CN111481323A discloses an aortic valve forming ring), but the success rate is still low at present, and most patients need to be operated again; the above-mentioned surgery is more traumatic and risky for the elderly patients.

Therefore, how to effectively recover (recover for a long time or temporarily) the function of the prolapsed aortic valve on the premise of reducing trauma is an international problem to be solved urgently in the field of cardiovascular medical treatment at present.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a supporting device for treating aortic valve prolapse, which is beneficial to effectively recover the function of the prolapsed aortic valve on the premise of reducing trauma.

To achieve the above object, the present invention provides a supporting device for treating aortic valve prolapse, which is characterized in that: comprises a bracket for being placed in the left ventricular outflow tract and a fixing piece connected with the bracket and used for positioning the bracket in the left ventricular outflow tract; the support is a communicated structure which is communicated along the blood flow direction, and the upper end surface of the support is provided with a supporting part which is used for contacting the bottom end of the aortic valve and supporting the aortic valve.

As the utility model discloses technical scheme's further improvement, the support includes interior ring sum outer ring body, be connected by a plurality of roots branch that are radial distribution between interior ring sum outer ring body, it is adjacent have the clearance between the branch, each the up end of branch forms the supporting part jointly.

As the utility model discloses technical scheme's further improvement, interior ring member sets up with outer ring member is concentric, each branch is along circumference evenly distributed on the circumference that uses the center of support as the centre of a circle.

As the utility model discloses technical scheme's further improvement, outer ring body is soft membrane tubular construction, branch is the elastic rod structure and can compress and release towards the center pin of inner ring body, after releasing completely branch is along the radial arrangement of inner ring body.

As a further improvement of the technical proposal of the utility model, the supporting rod is made of shape memory alloy.

As a further improvement of the technical scheme of the utility model, the inner ring body is provided with a central through hole.

As a further improvement of the technical solution of the present invention, the fixing member includes a first fixing ear for anchoring at a space between human body chambers, and an upper end edge of the first fixing ear is connected to the outer ring body.

As a further improvement of the technical solution of the present invention, the fixing member further includes a second fixing ear for being positioned between the anterior mitral valve and the aortic valve, and an upper end edge of the second fixing ear is connected to the outer ring body.

As a further improvement of the technical scheme of the utility model, be equipped with on the support and develop and show the mark.

Compared with the prior art, the utility model discloses following beneficial technological effect has:

the utility model provides a supporting device for treating aortic valve prolapse, which implants the support to the left ventricular outflow tract position below the aortic valve of a patient suffering from aortic valve prolapse through the apex of the heart, and then positions the support through the fixing part to realize the installation of the device; when the aortic valve of systole is open, blood flows out behind the support, and when the aortic valve of diastole was closed, the aortic valve of former prolapse can be supported spacingly by the supporting part, can not take off to the left ventricle to make the aortic valve close completely, can not arouse the palirrhea.

Compared with the existing valve replacement operation or aortic valve shaping operation, the implementation of the utility model is beneficial to effectively recovering the function of prolapsed aortic valve under the premise of reducing trauma, and simultaneously, the utility model also improves the operation safety and the operation efficiency and reduces the treatment cost; the utility model meets the social needs, has strong practicability and is favorable for promoting the further development of cardiovascular medical treatment technology.

Drawings

Fig. 1 is a schematic top view of the present invention.

Detailed Description

In order to make the technical solution of the present invention better understood, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments; of course, the drawings are simplified schematic drawings, and the scale of the drawings does not limit the patented products.

Examples

As shown in fig. 1: the embodiment provides a supporting device for treating aortic valve prolapse, which comprises a bracket 1 and a fixing part 2, wherein the bracket 1 is used for being placed in a left ventricular outflow tract, and the fixing part 2 is connected to the bracket 1 and is used for positioning the bracket 1 in the left ventricular outflow tract; the stent 1 is a communicated structure which is communicated along the blood flow direction, and a supporting part which is used for contacting with the bottom end of the aortic valve and supporting the aortic valve is arranged on the upper end surface of the stent 1.

The left ventricle of the human body is divided into an inflow channel and an outflow channel, the inflow channel is a ventricular cavity from the mouth of the left ventricle to a section of apex, and a mitral valve is attached to a fibrous ring around the mouth of the left ventricle; the outflow tract is a section of left ventricular cavity from the apex of the heart to the orifice of the aorta, also known as the aortic vestibulum; the outlet of the outflow tract is an aortic orifice, and three semilunar valves, namely aortic valves, are attached to the fibrous ring around the orifice; the inner cavity between the valve and the artery wall is an aortic sinus which can be divided into a left sinus, a right sinus and a rear sinus, and the artery wall of the left sinus and the artery wall of the right sinus are respectively provided with openings of a left coronary artery and a right coronary artery; normally, when the ventricle contracts, the mitral valve closes, the aortic valve opens, blood flows into the aorta, and when the ventricle relaxes, the aortic valve closes, preventing blood from flowing back into the ventricle, while the mitral valve opens, allowing blood from the left atrium to flow into the left ventricle.

When the operation is carried out, an operator can implant the stent 1 to the position of a left ventricular outflow tract below an aortic valve of a patient suffering from aortic valve prolapse through the apex of the heart (or in an interventional mode), and then position the stent 1 through the fixing piece 2 to realize the installation of the device; when the aortic valve of systole is open, because support 1 is the connected structure, can not block the flow of blood, blood flows out behind through support 1, and when diastole aortic valve closed, the aortic valve of former prolapse can be supported by the supporting part spacing, can not take off to the left ventricle to make aortic valve close completely, can not arouse the palirrhea.

For the convenience of operation, the stent 1 may be provided with a visualization marker (not shown in the figure) for facilitating visualization positioning by radiation, and the visualization marker may be, for example, a visualization wire attached to the surface of the stent 1, or a visualization wire provided inside the stent 1; of course, the stent 1 may be positioned by ultrasonic positioning without providing a visualization marker.

The stent 1 may be, for example, a compressible and releasable circular mesh, or may be other suitable structures for placement and support.

Preferably, in this embodiment, the stent 1 includes an inner ring 11 and an outer ring 12, the inner ring 11 and the outer ring 12 are connected by a plurality of radially distributed struts 13, a gap 14 is provided between adjacent struts 13, and the upper end surfaces of the struts 13 together form a support portion; the number of the struts 13 can be set as required; blood can flow through each gap 14; the inner ring body 11 and the outer ring body 12 are concentrically arranged, the struts 13 are uniformly distributed along the circumferential direction on the circumference with the center of the stent 1 (i.e. the center of the inner ring body 11 and the center of the outer ring body 12) as the center, and the included angles between the adjacent struts 13 are equal. In order to realize the compression, transportation and release of the stent 1, the outer ring body 12 is a soft membrane tube structure, the struts 13 are elastic rod structures and can be compressed and released towards the central axis of the inner ring body 11, after the struts are completely released, the struts 13 are arranged along the radial direction of the inner ring body 11, the inner ring body 11 is a hard ring, the outer ring body 12 and the struts 13 can be compressed on a commonly used transportation device (for example, transportation devices shown in patents CN 106618822A and CN 104622600 a) during the operation in a cavity through the action of external force, when the stent 1 reaches a proper position, the external force is released, and the outer ring body 12 and the struts 13 can restore to the original shape; for the convenience of transportation, the inner ring body 11 is provided with a central through hole 11a, and the flow obstruction to blood is further reduced; the strut 13 may be made of a shape memory alloy. The stent 1 having this structure can prevent the formation of thrombus because there is no dead space where blood flows strike.

The fixing member 2 is used for positioning the stent 1 as long as this function is achieved.

Preferably, in the present embodiment, the fixing member 2 includes a first fixing ear 21 for anchoring to the human body compartment, and an upper end edge of the first fixing ear 21 is connected to the outer ring body 12; the first fixing lug 21 can be made of dacron or medical plastic, for example, and is anchored to the interventricular septum by a medical rivet after being released, thereby providing a positioning force for the stent 1. In addition, the fixing member 2 further comprises a second fixing ear 22 for positioning between the anterior mitral valve and the aortic valve, and the upper end edge of the second fixing ear 22 is connected to the outer ring body 12; the second fixing ears 22 can also be made of terylene or medical plastics, and the second fixing ears 22 and the first fixing ears 21 can be arranged on the left side and the right side of the outer ring body 12; the second fixing ear 22 can be clamped in the annulus fibrosus between the anterior mitral valve and the aortic valve, and provides positioning acting force for the stent 1 together with the first fixing ear 21, so as to ensure stable positioning of the stent 1.

Finally, it is stated that the specific individual example is used herein to explain the principle and the implementation of the present invention, and the explanation of the above embodiment is only used to help understand the core idea of the present invention, without departing from the principle of the present invention, it is also possible to make the present invention undergo several improvements and modifications, and these improvements and modifications also fall into the protection scope of the present invention.

Claims

1. A support device for treating aortic valve prolapse, comprising: comprises a bracket for being placed in the left ventricular outflow tract and a fixing piece connected with the bracket and used for positioning the bracket in the left ventricular outflow tract; the support is a communicated structure which is communicated along the blood flow direction, and the upper end surface of the support is provided with a supporting part which is used for contacting the bottom end of the aortic valve and supporting the aortic valve.

2. A support device for the treatment of aortic valve prolapse according to claim 1 wherein: the support comprises an inner ring body and an outer ring body, the inner ring body and the outer ring body are connected through a plurality of radially distributed supporting rods, gaps are formed between every two adjacent supporting rods, and the upper end faces of the supporting rods jointly form a supporting portion.

3. A support device for the treatment of aortic valve prolapse according to claim 2 wherein: the inner ring body and the outer ring body are arranged concentrically, and the supporting rods are uniformly distributed along the circumferential direction on the circumference which takes the center of the support as the center of a circle.

4. A support device for the treatment of aortic valve prolapse according to claim 2 wherein: the outer ring body is of a soft membrane tube structure, the supporting rods are of elastic rod structures and can be compressed and released towards the central axis of the inner ring body, and the supporting rods are arranged along the radial direction of the inner ring body after being completely released.

5. A support device for the treatment of aortic valve prolapse according to claim 4 wherein: the support rod is made of shape memory alloy.

6. A support device for the treatment of aortic valve prolapse according to claim 2 wherein: the inner ring body is provided with a central through hole.

7. A support device for the treatment of aortic valve prolapse according to any of claims 2 to 6 wherein: the fixing piece comprises first fixing ears for anchoring in human body chambers, and the upper end edges of the first fixing ears are connected to the outer ring body.

8. A support device for the treatment of aortic valve prolapse according to claim 7 wherein: the fixation member further comprises a second fixation ear for positioning between the anterior mitral valve and the aortic valve, an upper end edge of the second fixation ear being connected to the outer ring body.

9. A support device for the treatment of aortic valve prolapse according to any of claims 1 to 6 wherein: and the bracket is provided with a developing indicating mark.