CN115998361A - Heart treatment device - Google Patents

Abstract

The invention provides a heart treatment device which is used for plugging a left auricle and comprises an expansion piece and a matching piece detachably fixed with the expansion piece, wherein the expansion piece is of a hollow structure, the expansion piece comprises a first film and a second film which are mutually overlapped, a support piece is arranged between the first film and the second film, the expansion piece comprises a first expansion area and a second expansion area, the support piece is at least arranged in the second expansion area, and the expansion piece is used for fixing the left auricle through the matching piece. Aims at solving the problems of low toughness, weak adherence and insufficient supporting force of the heart treatment device.

Description

Cardiac Therapy Device

technical field

The invention relates to the technical field of medical devices, in particular to a heart treatment device for blocking the left atrial appendage.

Background technique

Atrial fibrillation, or atrial fibrillation for short, is one of the most common heart rhythm disorders. The biggest risk of atrial fibrillation is that it is prone to lead to embolism events, such as acute cerebral infarction and acute myocardial infarction. Patients with high risk of embolism in atrial fibrillation need active anticoagulant therapy, and drug anticoagulant therapy has the risk of bleeding including cerebral hemorrhage. Left atrial appendage seal The occlusion operation uses domestic or imported occluders to block the left atrial appendage through interventional surgery to prevent the formation of left atrial appendage (LAA) thrombus during atrial fibrillation, which can achieve the therapeutic effect of drug anticoagulation and reduce long-term disability caused by thromboembolism in patients with atrial fibrillation. or death, while the risk of bleeding is greatly reduced. Therefore, left atrial appendage closure can eliminate the dependence of patients on long-term oral anticoagulant therapy, and provide a new treatment option for patients who cannot receive anticoagulant therapy for a long time, who are unwilling to take drug anticoagulant therapy, and who are at high risk of bleeding.

The occluder in the prior art usually sends the occluder umbrella into the opening of the left atrial appendage to completely close the opening of the left atrial appendage, and a occluder plate is designed behind the occluder umbrella to prop up the wall of the left atrial appendage, thereby fixing the occluder umbrella. The structure of the umbrella disc in the prior art is made of metal mesh, and the outer surface of the blocking umbrella needs to have barbs. The above structure has many disadvantages: 1. There are strict requirements on the shape of the auricle, and many patients have lobed auricles. Irregularity, insufficient auricle depth and other reasons lead to closure failure or incomplete closure. 2. In order to reduce the falling off of the occluder, most of the existing occluders are designed with barbs on the occluder. After the occluder is released, the barbs are inserted into the left atrial wall to play a stabilizing role. However, due to the insertion of the barbs The depth and direction are uncontrollable, and it is very easy to penetrate the atrial wall and cause pericardial effusion. 3. Existing occluders use a large area of nickel-titanium alloy framework to contact the flowing blood. In order to prevent thrombus, a large number of anticoagulant drugs must be used for half a year after surgery, and patients receiving left atrial appendage occlusion are precisely combined with anticoagulation. Patients with contraindications or poor anticoagulant effect. 4. The existing left atrial appendage occluder is likely to cause postoperative shunt omission, poor adherence, and low sealing degree, which may easily cause postoperative hidden dangers.

Contents of the invention

In view of this, the purpose of the present invention is to provide a heart treatment device for occluding the left atrial appendage, aiming at solving the problems of the heart treatment device having low toughness, weak wall-attachment and insufficient supporting force.

The present invention provides a cardiac treatment device for occluding the left atrial appendage, comprising an expansion element and a fitting detachably fixed to the expansion element, the expansion element fixes the left atrial appendage through the fitting element; The expansion member has a hollow structure, the expansion member includes a first film and a second film stacked on top of each other, a support member is provided between the first film and the second film, and the expansion member includes a first expansion film zone and a second expansion zone, the support member is provided at least in the second expansion zone.

In one embodiment, the supporting element is disposed in the second expansion region, and the modulus of elasticity of the supporting element is smaller than that of the expanding element.

In one embodiment, the support member includes a first support portion disposed in the first expansion area and a second support portion disposed in the second expansion area, and at least the first support portion in the support The elastic modulus of the part is greater than the elastic modulus of the expansion part.

In one embodiment, the modulus of elasticity of the first supporting part is greater than that of the second supporting part.

In one embodiment, the support includes at least one layer of support net, the grid density of the first support part is greater than or equal to the grid density of the second support part, and/or, the first support The number of the support nets of the first support part is greater than the number of the support nets of the second support part.

In one embodiment, an intervening portion for relatively fixing the expansion part and the matching part is provided inside the expansion part.

In one embodiment, the intervening part includes a threaded groove and an insertion groove for connecting the fitting, and the fitting is detachably socketed in the insertion groove.

In one embodiment, the contact surfaces of the intervening part and the fitting part are respectively provided with a first fitting position and a second fitting part, and the intervening part and the fitting part pass through the first fitting part and the The second fit is an interference fit.

In one embodiment, it further includes a closing film for covering the intervening part, the intervening part is formed in the channel passing through the expansion member, and the closing film is located in the second expansion area away from the first expansion side of the area.

In an embodiment, the expansion member further has a filling opening for filling the expansion member, and the filling opening is located at an end of the intervening portion away from the first expansion area.

In the heart treatment device for blocking the left atrial appendage provided by the present invention, a support member is installed between the first film and the second film of the expansion member to improve the toughness of the heart treatment device, mainly to strengthen the space between it and the left atrial appendage. The wall-adherence improves the sealing effect of the occlusion, and the support member improves the support force of the expansion part at the occlusion position, reducing the risk of the expansion part being compressed and deformed by the heart tissue. The expansion member has a first expansion area filled in the opening of the left atrial appendage and a second expansion area anchored at the opening of the left atrial appendage near the left atrium side, and the elastic modulus of the supporting member arranged in the second expansion area can be smaller than the expansion area. The elastic modulus of the component makes the supporting component play a main supporting role at the position corresponding to the second expansion zone, which can increase the supporting force and enhance the sealing effect of the cardiac treatment device.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.

Fig. 1 is a schematic structural diagram of a heart treatment device in a first embodiment of the present invention.

FIG. 2 is a structural schematic diagram of the supporting member and the matching member in FIG. 1 .

Fig. 3 is a structural schematic diagram of the expansion member and the support member in Fig. 1 .

FIG. 4 is a schematic front view of the support in FIG. 1 .

FIG. 5 is a schematic side view of the support in FIG. 1 .

FIG. 6 is a schematic structural diagram of the first supporting part in FIG. 1 .

Fig. 7 is a schematic structural diagram of the second supporting part in Fig. 1 .

FIG. 8 is a schematic structural diagram of the fitting in FIG. 1 .

Fig. 9 is a schematic structural diagram of a heart treatment device in a second embodiment of the present invention.

FIG. 10 is a schematic structural view of the supporting member and the matching member in FIG. 9 .

Detailed ways

Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the description of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

In the description of the present invention, unless otherwise specified and limited, the terms "installation", "installation", "connection" and so on should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated Ground connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in specific situations.

The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer" etc. is based on the attached The orientation or positional relationship shown in the figure, or the conventional orientation or positional relationship of the invention product in use, is only for the convenience of description and simplification of the description, not to indicate or imply that the referred device or element must have a specific orientation , constructed and operated in a particular orientation and therefore should not be construed as limiting the invention.

The terms "first", "second", "third", etc. are only used to distinguish elements of similar nature, and do not indicate or imply relative importance or a specific order.

The terms "comprising", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion of elements other than those listed and also other elements not expressly listed.

first embodiment

Please refer to FIG. 1 to FIG. 8 , one embodiment of the present invention provides a cardiac treatment device for occluding the left atrial appendage, including an expansion member 10 and a fitting 30 detachably fixed to the expansion member 10 , the expansion member 10 It is a hollow structure, and the expansion member 10 includes a first film and a second film stacked on top of each other. A support member 20 is arranged between the first film and the second film. The expansion member 10 includes a first expansion area 11 and a second In the expansion area 12, the support member 20 is provided at least in the second expansion area 12. In this embodiment, the support member 20 is distributed throughout the first expansion area 11 and the second expansion area 12. The expansion member 10 connects the left atrial appendage through the fitting 30 fixed.

Specifically, the expansion member 10 can be inflated by injecting liquid or gas, and the expanded volume can be selected by the surgeon according to the patient's atrium structure or shape, which is not limited here. The support member 20 corresponding to the first expansion area 11 and the support member 20 corresponding to the second expansion area 12 may or may not be connected to each other, the first expansion area 11 props up the tissue of the opening of the left atrial appendage, and the second expansion area 12 is anchored At the opening of the left atrial appendage on the left atrium side, the radial width of the second expansion zone 12 is larger than the radial width of the first expansion zone 11, so as to prevent the first expansion zone 11 from sliding into the opening of the left atrial appendage in the direction of the left atrial appendage. After the expansion part 10 is closely adhered to the wall and sealed into the opening of the left atrial appendage, the fitting part 30 is connected to the expansion part 10, and the end of the fitting part 30 away from the expansion part 10 is closed to fix the left atrial appendage.

The above-mentioned cardiac treatment device including the expansion member 10, the support member 20 and the matching member 30 is different from the prior art and mainly has the following beneficial effects: 1. The support member 20 provided in the first expansion area 11 plays the role of supporting the expansion member 10 , so that the blocking effect of the expansion member 10 in the opening of the left atrial appendage is more stable, and prolongs the service life of the expansion member 10; 2. The second expansion area 12 is mainly used to prevent blood from flowing into the opening of the left atrial appendage from the left atrium, which is preferably a support Part 20 plays a main supporting role, which can improve the support force and sealing performance of the heart treatment device; 3. The left atrial appendage is connected with the expansion part 10 through the fitting part 30, so as to realize the fixation of the heart treatment device and the left atrial appendage, and block the connection between the left atrium and the left atrial appendage. Blood flow between the left atrial appendages, and improve the occlusion stability of the heart treatment device.

In this embodiment, the first film and the second film are respectively located on opposite sides of the support 20 , the melting point of the first film is higher than the melting point of the second film, and the support 20 is connected to the first film.

Specifically, the first film is located on the relative inner side of the expansion member 10, and the second film is located on the relative outer side of the expansion member 10. The support member 20 is preferably made of an alloy material, and the alloy has light weight, non-magnetic properties, non-toxicity, corrosion resistance, and strength. High, good toughness and other advantages, in the field of surgical treatment, the amount of human implants is gradually increasing, but the human body usually rejects metal implants, if the blood directly flows through the metal support 20, there is a greater possibility that it will be damaged due to Thrombus is formed due to the hindrance of foreign matter, which causes patients to take anticoagulant drugs for a long time after implantation. In this embodiment, the support 20 is arranged between the first film and the second film and connected with the first film to isolate the Foreign matter and blood avoid the formation of thrombus. The connection method between the support member 20 and the expansion member 10 is mainly to bond the support member 20 to the heated first film. The preparation material of the first film and/or the second film can be It is a polymer, such as rubber, polyester material, etc. Since the second film is in direct contact with human heart tissue, at least an anticoagulation coating needs to be coated on the outer surface of the second film.

The arrangement of the first film and the second film has the following beneficial effects: 1. The area of the second film is larger than that of the first film, and the support member 20 can be bonded on the first film and can be reduced under the situation of complete attachment. Connecting the contact area simplifies the preparation process, and can also reduce the requirements for the material and process of the second film; 2. Since the second film does not need to be heated, the melting point of the first film is preferably higher than that of the second film, which can expand The selection range of the second film; 3. Coating an anticoagulant coating on the outer surface of the second film aims at improving the anticoagulant effect of the heart treatment device.

In this embodiment, the support member 20 includes a first support portion 21 disposed in the first expansion region 11 and a second support portion 22 disposed in the second expansion region 12, the elastic mold of the first support portion 21 in the support member 20 The amount is greater than the modulus of elasticity of the expansion element 10.

Specifically, the elastic modulus of the first support part 21 in the support member 30 is greater than the elastic modulus of the expansion part 10 , and the elastic modulus of the second support part 22 is smaller than the elastic modulus of the expansion part 10 . 1. Realize that the blocking area of the cardiac treatment device in the opening of the left atrial appendage serves as the main blockage and support function for the expansion member 10, and the first supporting part 21 plays a role in supporting the expansion member 10 to increase toughness; 2. On the left side of the left atrium side The anchoring area at the opening of the atrial appendage plays a major blocking and supporting role for the second supporting part 22, increasing the wall-attachment effect and airtightness of the heart treatment device.

In other embodiments, the supporting element 20 is disposed in the second expansion region 12 , and the elastic modulus of the supporting element 20 is smaller than the elastic modulus of the expanding element 10 .

In this embodiment, the elastic modulus of the first supporting portion 21 is greater than the elastic modulus of the second supporting portion 22 .

Specifically, when the heart treatment device is inserted into the opening of the left atrial appendage, the volume of the first support part 21 needs to be reduced first, and the original volume is restored after entering the occlusion position, so as to achieve the effect of increasing the adherence; and On the side of the left atrium, the second supporting part 22 mainly supports the role of increasing the supporting force by reducing its elastic modulus.

In this embodiment, the support member 20 is formed on at least one layer of support net, the grid density of the first support portion 21 is greater than or equal to the grid density of the second support portion 22, and/or, the support of the first support portion 21 The number of nets is greater than that of the support nets of the second support portion 22, and the multi-layer support nets are stacked on top of each other.

Specifically, the support member 20 can control the number of support nets or control the grid density of the support nets, so as to adjust the elastic modulus of the first support part 21 and the second support part 22 respectively. Among them, the greater the grid density of the support net, the better the support effect; the smaller the grid density of the support net, the worse the support effect; or, the more layers of the support net, the better the support effect; The less, the less effective the support will be.

According to the above-mentioned elastic modulus of the first support part 21 is greater than the elastic modulus of the second support part 22, the support member 20 can be set such that the grid density of the support net of the first support part 21 is greater than that of the second support part 22. The grid density of the supporting net; or, the number of supporting nets in the first supporting part 21 is greater than the number of supporting nets in the second supporting part 22 . Using the structure of the metal material to adjust the elastic modulus can take advantage of the properties of the metal material such as light weight, non-magnetic, non-toxic, corrosion resistance, high strength, and good toughness, and reduce the difficulty of selecting materials for the support member 20 in preparation.

In this embodiment, the fitting 30 has an inserting portion 31 and a clamping portion 32 arranged perpendicular to each other, the expansion member 10 and the fitting 30 are connected through the inserting portion 31, and the clamping portion 32 is located in the first expansion zone 11 away from the second One side of the second expansion zone 12.

Specifically, the shape of the fitting 30 can be umbrella-shaped or tree-shaped, wherein the clamping portion 32 has a relatively large lateral area, and the shape of the clamping portion 32 is similar to a tree branch, and the branch-shaped clamping portion 32 can increase its compatibility with For the connection stability of the left atrial appendage, the insertion part 31 has a longer length, and the length direction of the insertion part 31 is perpendicular to the transverse direction of the clamping part 32, so that after the insertion part 31 extends into the expansion part 10, the clamping part 32 is restricted outside the expansion member 10 , and the left atrial appendage is pulled by the clamping portion 32 and fixed on the expansion member 10 .

In this embodiment, the inside of the expansion member 10 is provided with an intervening portion P for relatively fixing the expansion member 10 and the matching member 30 , and the intervening portion P can also be used for inserting the expansion member 10 into the human body.

In this embodiment, the intervening part P includes a threaded groove and an insertion groove for connecting the fitting 30. The fitting 30 is detachably socketed in the insertion groove, and the thread groove communicates with the insertion groove. In other embodiments , The threaded groove and the socket groove are watertightly separated.

Specifically, the intervening portion P runs through the entire expansion member 10 from the first expansion area 11 to the second expansion area 12, the thread groove is located at the end of the intervening portion P close to the second expansion area 12, and the insertion groove is located at the end of the intervening portion P close to the first expansion area. At one end of the zone 11 , the intervention of the cardiac treatment device and the insertion of the fitting 30 do not interfere with each other. Furthermore, the insertion part 31 is detachably connected to the intervention part P, which can match the size of the expansion part 10 or the matching part 30 during the operation, and can also adjust the fixed position adaptively to improve the treatment effect.

In this embodiment, the contact surfaces of the intervening part P and the fitting part 30 are respectively provided with a first fitting position and a second fitting part, and the intervening part P and the fitting part 30 are interference fit through the first fitting part and the second fitting part.

Specifically, to prevent the insertion part 31 and the intervening part P from rotating or moving after being installed, the contact surfaces of the insertion part 31 and the intervening part P are respectively provided with a first matching position and a second matching position. The second fitting positions may be connected by screw thread or by a concave-convex combination. When the first fitting position and the second fitting position are threadedly connected, the first fitting position is formed by the first thread, then the insertion part 31 is a threaded rod, and the threaded rod has a second thread that is interference fit with the first thread , the second fitting position is formed by the second screw thread; when the first fitting position and the second fitting position can be connected by a concavo-convex joint, the first fitting position is formed by a limiting groove, and the second fitting position Due to the formation of the limiting protrusion of the interference fit of the limiting groove, the fit between the insertion part 31 and the intervening part P in this embodiment is preferably to form an interference fit through the limiting groove and the limiting protrusion to reduce the connection. The friction force at the place improves the service life and facilitates the disassembly of the socket part 31.

In this embodiment, since the intervening part P is formed in the passage through the expansion member 10, the insertion groove and the thread groove of the intervening part P are in a connected state, and it is difficult to install a sealing film in a narrow space. And it is inconvenient to check its sealing effect. In this embodiment, a sealing film is provided for covering the intervening part P, and the sealing film is located on the side of the second expansion area 12 away from the first expansion area 11 .

Specifically, the opening of the intervention part P needs to be opened when installing the heart treatment device or the inflatable expansion member 10. After the implantation operation of the heart treatment device is completed, the opening of the end of the intervention part P near the second expansion area 12 needs to be closed or hidden. In order to isolate the blood flow between the intervention part P and the left atrium, in this embodiment, a movable sealing membrane is preferably attached to the opening of the end of the intervention part P close to the second expansion area 12. Open the sealing film at 10 o'clock, complete the installation of the cardiac treatment device or fill the expansion part 10, the sealing film will automatically cover the opening, avoiding the blockage of the cardiac treatment device by the connection gap between the insertion part 31 and the intervention part P Effectiveness and tightness have an impact. The sealing membrane can be connected in such a way that a part of the sealing membrane can be fixedly covered at the opening, leaving a part for opening or closing, and the remaining part can pass into the delivery catheter routinely selected by those skilled in the art.

In this embodiment, the expansion member 10 also has a filling port for filling the expansion member 10 , and the filling port is located at the end of the intervening portion P away from the first expansion area 11 .

Specifically, the first sheath usually introduces the cardiac treatment device into the human body from the second expansion area 12, and the filling port for filling the expansion member 10 is preferably located at one end of the intervention part P close to the second expansion area 12, which can be used to install the cardiac treatment device. The expansion member 10 is inflated while the device is being installed. The filling port is located at the end of the thread groove away from the first expansion area 11, so as to prevent the filling of the expansion member 10 from affecting the connection between the first sheath tube and the cardiac treatment device.

second embodiment

Please refer to FIG. 9 and FIG. 10 , another embodiment of the present invention provides a cardiac treatment device for occluding the left atrial appendage. The difference from the first embodiment is that in this embodiment, the first expansion area 11 It has a connecting portion 111 and a mounting portion 112 , the connecting portion 111 and the mounting portion 112 are respectively located at two ends of the first expansion area 11 , and the second expansion area 12 is connected with the connecting portion 111 . The first support part 21 is only located at the installation part 112 of the first expansion area 11 , and the second support part 22 is located at the second expansion area 12 .

Specifically, the part that mainly plays a supporting role in the left atrial appendage opening is located at the end of the expansion member 10 away from the second expansion area 12, that is, where the installation part 112 is located. The volume or weight reduces the burden on the atrium, and maintains the supporting force at the end of the expansion member 10 .

The heart treatment device provided by the present invention as described in the first embodiment or the second embodiment can be inserted into the human body through the following steps, but not limited to:

S1: According to the routine operation of surgeons in this field, the catheter guide wire is sent into the right atrium through the femoral vein, the atrial septum is punctured and the guide wire is placed in the left atrium, and the first sheath and the expansion member 10 are passed through the intervention part P Insert the skin expansion tube into the first sheath, send it into the left atrium along the guide wire, exit the skin expansion tube, send it into the pigtail catheter through the first sheath, adjust the direction of the catheter, and send the pigtail catheter into the left atrial appendage Inside, send the first sheath tube into the left atrial appendage along the pigtail catheter, and fill the expansion part 10 with liquid through the water injection port of the first sheath tube. The opening of the left atrial appendage, the support member 20 has a certain supporting effect and improves stability, the filling port connected to the first sheath on the expansion member 10 is provided with a one-way valve, and the sheath is provided with a hose, which is inserted into the one-way valve In the expansion part 10, water injection and pumping are realized, and the hose is pulled out after the sealing is tight, and the one-way valve on the expansion part 10 is automatically closed to prevent liquid leakage;

S2: Aspirate the residual blood in the left atrial appendage through the pigtail catheter, withdraw the pigtail catheter, insert the second sheath along the first sheath, and insert a puncture guide wire along the second sheath with a skin expansion tube in the first sheath. High-frequency electric energy penetrates the left atrial appendage and enters the pericardial cavity, pushes the second sheath along the guide wire through the left atrial appendage and enters the pericardial cavity, exchanges the left atrium guide wire and enters the pericardial cavity, exits the skin expansion tube and guide wire, and indwells the second sheath in the pericardium cavity;

S3: After connecting the fitting 30 with the steel cable used to connect the fitting 30, push the cardiac treatment device along the second sheath, release the clamping part 32 of the fitting 30 in the pericardial cavity, and then start to withdraw the second Sheath tube, but the second sheath tube is not completely removed, the body of the left atrial appendage is squeezed between the fitting part 30 and the expansion part 10, the push rod and the first sheath tube are fixed, and the second sheath tube is continued to be withdrawn. The first sheath internally releases the fitting part 30 and inserts the joint part 31, and is connected with the inner wall of the intervening part P. The fitting part 30 can be released by rotating the steel cable, and the steel cable connecting the fitting part 30 and the second sheath tube are withdrawn, and the first sheath is disconnected. The connection between the sheath tube and the heart treatment device completely releases the heart treatment device. After the first sheath tube is withdrawn, the movable covering membrane falls naturally to seal the threaded groove of the intervention part P and the intervention part P.

Further, in step 3, a hose is provided in the water injection port at the tail of the first sheath, and the head end of the hose is inserted into the one-way valve, and the expansion piece 10 is fed through the hose before the expansion piece 10 is separated from the first sheath. Inject water or pump water. After the plugging is completed and the inspection effect is good, the hose is withdrawn, the hose is retracted into the first sheath, and the first sheath is separated from the expansion member 10.

In addition, before the steel cable releases the fitting 30, check whether the heart treatment device can successfully block the opening of the left atrial appendage through push-pull experiments, ultrasound detection, contrast evaluation, etc. The heart treatment device of the model can realize the repeated retraction of the heart treatment device. If the system positioning is not satisfactory, the expansion part 10 or the matching part 30 can be completely retracted and re-sealed. The utilization rate and the sealing effect are significantly enhanced.

The heart treatment device for blocking the left atrial appendage provided by the present invention, by installing a support member 20 between the first film and the second film of the expansion member 10, to improve the toughness of the heart treatment device, mainly to strengthen its connection with the left atrial appendage The wall-adherence between them improves the sealing effect of the occlusion, and the support member improves the support force of the expansion member 10 at the occlusion position, reducing the risk of the expansion member 10 being compressed and deformed by the heart tissue. The expansion member 10 has a first expansion area 11 filled in the opening of the left atrial appendage and a second expansion area 12 anchored at the opening of the left atrial appendage near the left atrium side, and the elasticity of the support member 20 arranged in the second expansion area 12 The modulus may be smaller than the elastic modulus of the expansion member 10, so that the support member 20 plays a main supporting role at the position corresponding to the second expansion area 12, which can increase the supporting force and enhance the sealing effect of the cardiac treatment device.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. All should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims (10)

1. A heart treatment device, used to block the left atrial appendage, is characterized in that it comprises an expansion piece (10) and a matching piece (30) detachably fixed with the expansion piece (10), the expansion piece ( 10) fixing the left atrial appendage through the fitting (30); The expansion member (10) has a hollow structure, and the expansion member (10) includes a first film and a second film stacked on top of each other, and a support member (20) is arranged between the first film and the second film. ); The expansion member (10) comprises a first expansion area (11) and a second expansion area (12), and the support member (20) is at least arranged in the second expansion area (12). 2. The cardiac treatment device according to claim 1, characterized in that, the support (20) is arranged in the second expansion area (12), and the modulus of elasticity of the support (20) is smaller than that of the expansion The modulus of elasticity of the piece (10). 3. The cardiac treatment device according to claim 1, characterized in that, the support member (20) comprises a first support portion (21) disposed on the first expansion area (11) and a support portion disposed on the second In the second support part (22) of the expansion area (12), the elastic modulus of at least the first support part (21) in the support part (20) is greater than the elastic modulus of the expansion part (10). 4. The cardiac treatment device according to claim 3, characterized in that, the modulus of elasticity of the first support part (21) is greater than the modulus of elasticity of the second support part (22). 5. The cardiac treatment device according to claim 4, characterized in that, the support (20) comprises at least one layer of support mesh, and the mesh density of the first support part (21) is greater than or equal to that of the first support part (21). The grid density of the two support parts (22), and/or, the number of the support nets of the first support part (21) is greater than the number of the support nets of the second support part (22). 6. The cardiac treatment device according to claim 1, characterized in that an intervening part (P) for relatively fixing the expansion part (10) and the matching part (30) is provided inside the expansion part (10). 7. The cardiac treatment device according to claim 6, characterized in that, the intervening part (P) comprises a thread groove and an insertion groove for connecting the fitting (30), and the fitting (30) It is detachably socketed in the insertion slot. 8. The heart treatment device according to claim 6, characterized in that, the contact surfaces of the intervening part (P) and the fitting (30) are respectively provided with a first fitting position and a second fitting position, the The intervening part (P) and the fitting part (30) are interference fit through the first fitting position and the second fitting position. 9. The cardiac treatment device according to claim 6, characterized in that it further comprises a sealing film for covering the intervening part (P), the intervening part (P) is formed through the expansion member (10) channel, the closing membrane is located on the side of the second expansion zone (12) away from the first expansion zone (11). 10. The heart treatment device according to claim 6, characterized in that, the expansion member (10) also has a filling port for filling the expansion member (10), and the filling port is located at the intervention part ( P) An end remote from said first expansion zone (11).

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