Cardiac volume reduction implant and conveyor

Abstract

The utility model provides a heart volume reduction implant and a conveyor, which relates to the technical field of medical instruments and comprises an isolation umbrella body, a connecting mechanism and a fixed base, the isolation umbrella body is connected with the fixed base through the connecting mechanism, the isolation umbrella body can isolate an invalid cardiac cavity, the connecting mechanism is provided with a hollow channel for the conveyor to penetrate through, the conveyor can sequentially penetrate through the isolation umbrella body and the hollow channel, and the fixed base can expand and support the interior of the cardiac cavity under the action of the conveyor; the conveyor can directly penetrate through the isolation umbrella body to be matched with the fixed base through the hollow channel, the expansion form of the fixed base can be adjusted through the conveyor, and then the good adaptability and stability of the fixed base to heart cavities of different sizes and forms are achieved; the technical problems that in the prior art, due to the fact that an umbrella body is fixed through edge anchor thorns, stability is low, and damage to the heart is large when the umbrella body is fixed through the cardiac apex are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a heart volume reduction implant and a conveyor. Background Art

[0002] Heart failure is the final outcome of most cardiovascular diseases and can lead to death. The patient's heart cannot provide enough blood flow to meet the body's needs. Symptoms of heart failure have a negative impact on quality of life and include shortness of breath, persistent coughing or wheezing, excessive fluid accumulation in body tissues (edema), fatigue, loss of appetite or nausea, slow thinking, and increased heart rate. In recent years, the prevalence of heart failure has increased year by year, becoming a serious public health problem; after a heart attack, many patients experience left ventricular enlargement, resulting in reduced cardiac output, which in turn causes heart failure symptoms such as shortness of breath. The left ventricular volume reduction device is a catheter-based minimally invasive treatment technology used to isolate damaged myocardium, isolating the non-functional part of the heart from the healthy, functional part, thereby reducing the total volume of the left ventricle and restoring its morphology and function.

[0003] The main structure of the left ventricular volume reduction device in the prior art is an elastic nickel-titanium support frame and a support base, and the frame is covered with a layer of polymer film; the device is delivered to the left ventricular implantation site through a minimally invasive catheter interventional surgery, via the femoral artery, along the aorta, and through the aortic valve. The support base contacts the inner wall of the apex of the heart, and after the support frame expands, the ventricle is isolated into a static heart chamber and a dynamic heart chamber.

[0004] However, the existing methods of fixing the left ventricular volume reduction device mainly include: 1. The device is fixed by anchoring thorns on the upper edge of the umbrella body, which has low stability. 2. The device is fixed through the apex of the heart, which causes great damage to the heart and complicated procedures. Utility Model Content

[0005] The utility model aims to provide a cardiac volume reduction implant and a conveyor to alleviate the technical problems in the prior art that the parachute body is fixed by edge anchors, the stability is low, and trans-apical fixation causes great damage to the heart.

[0006] The utility model provides a cardiac volume reduction implant, comprising: an isolation umbrella, a connecting mechanism and a fixed base;

[0007] The isolation umbrella body is connected to the fixed base through the connecting mechanism. The connecting mechanism has a hollow channel for a conveyor to pass through. The conveyor can pass through the isolation umbrella body and the hollow channel in sequence. The fixed base can expand and support the interior of the heart cavity under the action of the conveyor.

[0008] In a preferred embodiment of the utility model, the connecting mechanism includes connecting the waist;

[0009] The connecting waist is located between the isolation umbrella body and the fixed base. The isolation umbrella body expands outwards with the connecting waist as the center, and the fixed base expands toward a side away from the isolation umbrella body with the connecting waist as the center.

[0010] In a preferred embodiment of the present utility model, the connecting mechanism further comprises a connecting nut;

[0011] The connecting nut is located inside the isolation parachute body, and the connecting nut is connected to the connecting waist. The connecting nut and the connecting waist penetrate to form the hollow channel.

[0012] In a preferred embodiment of the present utility model, the fixed base includes a plurality of fixing frames;

[0013] The plurality of fixing frames are arranged at intervals in the circumferential direction with the connecting waist as the center, each of the fixing frames is arranged in an arc shape, and the plurality of fixing frames can expand with the connecting waist as the center.

[0014] In a preferred embodiment of the present utility model, the fixed base further comprises anchor thorns;

[0015] A plurality of anchor thorns are arranged on a side of each fixing frame away from the isolation parachute body, and the plurality of anchor thorns are arranged at intervals along the arc-shaped bottom to the end of the fixing frame.

[0016] In a preferred embodiment of the utility model, the fixed base comprises an arc frame, a fixing member and an anchor barb;

[0017] The two ends of the arc frame are respectively connected to the connecting waist and the fixing member, and a hollow cavity for expansion is formed inside the arc frame;

[0018] The anchor spikes are arranged at intervals along the circumferential direction of the arc-shaped frame.

[0019] In a preferred embodiment of the present invention, the arc frame is integrally woven and connected to the connecting waist and the fixing member.

[0020] In a preferred embodiment of the present invention, the isolation umbrella body is a double-layer skeleton structure or a woven structure.

[0021] The utility model provides a conveyor for cooperating with the cardiac volume reduction implant, comprising: a conveyor rod and a balloon;

[0022] The balloon is located at the end of the delivery rod, and the delivery rod can penetrate the hollow channel so that the balloon is accommodated inside the fixed base. The balloon is used to adjust the expansion shape of the fixed base.

[0023] In a preferred embodiment of the present invention, the delivery rod is provided with an external thread, and the delivery rod is connected to the internal thread of the connection mechanism via the external thread.

[0024] The utility model provides a cardiac volume reduction implant, comprising: an isolation umbrella, a connecting mechanism and a fixed base; the isolation umbrella is connected to the fixed base through the connecting mechanism, the isolation umbrella can isolate the ineffective cardiac cavity, the connecting mechanism has a hollow channel for a conveyor to penetrate, the conveyor can sequentially penetrate the isolation umbrella and the hollow channel, and the fixed base can expand and support the interior of the corresponding cardiac cavity under the action of the conveyor; the hollow channel can ensure that the conveyor directly penetrates the isolation umbrella and forms a match with the fixed base, the conveyor can be used to adjust the expansion shape of the fixed base, and thus achieve good adaptability and stability of the fixed base to cardiac cavities of different sizes and shapes, thereby alleviating the technical problems in the prior art that the umbrella is fixed by edge anchor thorns to achieve device fixation, the stability is low, and trans-apical fixation causes great damage to the heart. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the structure of the cardiac volume reduction implant and the conveyor provided in the embodiment of the utility model;

[0027] Figure 2 A schematic diagram of the structure of the heart volume reduction implant provided by the embodiment of the utility model and the unfolded cooperation of the delivery balloon;

[0028] Figure 3 A schematic diagram of the structure of the cardiac volume reduction implant provided by an embodiment of the utility model in a state where the implant is separated from the conveyor;

[0029] Figure 4 A structural schematic diagram of a fixing base of a cardiac volume reduction implant provided by an embodiment of the utility model including a fixing frame;

[0030] Figure 5 A structural schematic diagram of a fixed base of a cardiac volume reduction implant provided by an embodiment of the utility model including an arc-shaped frame;

[0031] Figure 6 The arc-shaped frame of the cardiac volume reduction implant provided in the embodiment of the utility model is a schematic structural diagram of a braided shape.

[0032] Icons: 100-isolation parachute body; 200-connecting mechanism; 201-connecting waist; 202-connecting nut; 300-fixing base; 301-fixing frame; 302-anchor thorn; 303-arc frame; 304-fixing piece; 400-delivery rod; 500-balloon. DETAILED DESCRIPTION

[0033] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] like Figure 1-Figure 6 As shown, a cardiac volume reduction implant provided by this embodiment includes: an isolation umbrella body 100, a connecting mechanism 200 and a fixed base 300; the isolation umbrella body 100 is connected to the fixed base 300 through the connecting mechanism 200, and the connecting mechanism 200 has a hollow channel for a conveyor to pass through. The conveyor can pass through the isolation umbrella body 100 and the hollow channel in sequence, and the fixed base 300 can expand and support the interior of the corresponding heart cavity under the action of the conveyor.

[0035] It should be noted that the cardiac volume reduction implant provided in this embodiment can be implanted in the left ventricle to isolate the left ventricle to form a static heart chamber and a dynamic heart chamber, thereby achieving the therapeutic purpose of isolating ventricular aneurysm, reducing ventricular volume, and restoring ventricular pumping capacity; specifically, the isolation umbrella 100 can isolate the ineffective heart chamber, and the isolation umbrella 100 is connected to the fixed base 300 through the connecting mechanism 200. The hollow channel of the connecting mechanism 200 can ensure the penetration and withdrawal of the head end of the conveyor, and the conveyor can cooperate with the fixed base 300 through the hollow channel. When the conveyor forms an expansion support for the fixed base 300 through the expansion and retraction of the balloon 500, the expanded fixed base 300 can be used to adapt to heart chambers of different sizes and shapes, thereby improving the adaptability of the fixed base 300 to different heart chambers, thereby improving the implantation success rate and stability of the device.

[0036] In a preferred embodiment of the present invention, the isolation umbrella body 100 is a double-layer skeleton structure or a woven structure.

[0037] In this embodiment, the main body of the isolation parachute 100 may be a woven structure, with a flow-blocking membrane fixed inside or outside the woven mesh; or, the main body of the isolation parachute 100 may be a bracket structure, with a flow-blocking membrane fixed on the bracket structure.

[0038] Optionally, the isolation umbrella body 100 may be in the shape of a wine glass or a straw hat; preferably, the isolation umbrella body 100 may include an expansion section and an extension section; the expansion section is connected to the connecting waist 201 through the extension section, the expansion section is located at the end of the heart away from the apex, the expansion section is used to fit the ventricular wall, and the extension section can fit along the ventricular wall as the expansion section moves toward the apex. Specifically, the expansion section may be in a planar expansion structure, that is, the isolation umbrella body 100 is in the shape of an open umbrella surface, the expansion section can fit the position of the heart away from the apex, that is, the expansion section is the separation position of the ventricle after expansion, the static heart chamber and the dynamic heart chamber, the expansion section and the extension section can fit the ventricular wall of the heart, that is, the heart myocardium can be isolated from the expansion section to the extension section, the pressure of the isolated myocardium and the force transmitted to the apex are reduced, and the force generated by the expansion of the left ventricle is eliminated; in addition, in addition to the reduction of the load of the static heart chamber, the reduction of the dynamic heart chamber will also lead to a reduction in normal myocardial pressure, so that the load of the ventricle is reduced overall.

[0039] Preferably, the diameter of the expansion section is larger than the diameter of the extension section, and the extension section completely conforms to the shape of the heart; wherein the expansion section expands the ventricle in the form of an open umbrella, and since the ventricle of the heart is a gradually decreasing chamber from the inside to the apex, the extension section can be optionally arranged in a conical shape from the expansion section to the connecting waist 201, that is, the extension section can be gradually contracted as an umbrella rib, so that the extension section can conform to the shape of the ventricle and ensure that the static heart cavity is always in an expanded state. At the same time, the conical arrangement of the extension section can make a smooth transition between the end away from the expansion section and the fixed waist position, thereby ensuring the stable fixation of the connecting waist 201.

[0040] The present embodiment provides a cardiac volume reduction implant, comprising: an isolation umbrella 100, a connecting mechanism 200 and a fixed base 300; the isolation umbrella 100 is connected to the fixed base 300 through the connecting mechanism 200, the isolation umbrella 100 can isolate the ineffective cardiac chamber, the connecting mechanism 200 has a hollow channel for a conveyor to pass through, the conveyor can sequentially pass through the isolation umbrella 100 and the hollow channel, and the fixed base 300 can expand and support the interior of the corresponding cardiac chamber under the action of the conveyor; the hollow channel can ensure that the conveyor directly passes through the isolation umbrella 100 and forms a match with the fixed base 300, and the conveyor can be used to adjust the expansion shape of the fixed base 300, thereby achieving good adaptability and stability of the fixed base 300 to cardiac chambers of different sizes and shapes, thereby alleviating the technical problems in the prior art that the umbrella is fixed by edge anchor thorns 302, the stability is low, and the trans-apical fixation causes great damage to the heart.

[0041] On the basis of the above embodiments, further, in a preferred embodiment of the present invention, the connecting mechanism 200 includes a connecting waist 201; the connecting waist 201 is located between the isolation umbrella body 100 and the fixed base 300, the isolation umbrella body 100 expands outward with the connecting waist 201 as the center, and the fixed base 300 expands toward a side away from the isolation umbrella body 100 with the connecting waist 201 as the center.

[0042] In this embodiment, the end of the isolation umbrella body 100 is tightened by connecting the waist 201, and the fixed base 300 is opened outward through the position of the connecting waist 201. The connecting waist 201 serves as a fixed transition structure between the isolation umbrella body 100 and the fixed base 300. The connecting waist 201 can adopt a cylindrical structure, and a hollow channel is passed through the center of the connecting waist 201. When the isolation umbrella body 100 is formed by weaving, the connecting waist 201 can integrate all the weaving lines. The connecting waist 201 is used to ensure the smooth connection between the isolation umbrella body 100 and the fixed base 300, and the connecting waist 201 can ensure the stability of the isolation umbrella body 100 and the fixed base 300.

[0043] In a preferred embodiment of the present invention, the connecting mechanism 200 further includes a connecting nut 202; the connecting nut 202 is located inside the isolation umbrella body 100, and the connecting nut 202 is connected to the connecting waist 201, and the connecting nut 202 and the connecting waist 201 penetrate to form a hollow channel.

[0044] In this embodiment, the connecting nut 202 can serve as a connecting structure between the cardiac volume reduction implant and the conveyor. The connecting nut 202 can be connected to the conveyor by a threaded connection, and the connecting nut 202 and the connecting waist 201 form a fixed structure. The connecting nut 202 can form a threaded connection with the conveyor on the basis of ensuring the passage of the conveyor. When the conveyor drives the cardiac volume reduction implant into the implantation site, the fixed base 300 is expanded. When the fixed base 300 completes the expansion, the conveyor is separated from the connecting nut 202 and the conveyor can be withdrawn.

[0045] like Figure 4 As shown, in a preferred embodiment of the present invention, the fixed base 300 includes a plurality of fixing frames 301; the plurality of fixing frames 301 are arranged circumferentially with the connection waist 201 as the center, each fixing frame 301 is arranged in an arc shape, and the plurality of fixing frames 301 can expand with the connection waist 201 as the center.

[0046] In a preferred embodiment of the present invention, the fixed base 300 further comprises anchor spikes 302 ; each fixing frame 301 is provided with a plurality of anchor spikes 302 on the side away from the isolation parachute body 100 , and the plurality of anchor spikes 302 are arranged at intervals along the arc bottom to the end of the fixing frame 301 .

[0047] In this embodiment, the fixing frame 301 is used as an extended fixing rod structure. By arranging multiple fixing frames 301 at circumferential intervals with the connecting waist 201 as the center, the number of fixing frames 301 can be set according to different heart chamber sizes. When the fixing frame 301 reaches the implantation position, the balloon 500 of the conveyor is located at the position of the connecting waist 201 close to the fixing frame 301. When the balloon 500 is in the process of expansion, the balloon 500 can cause the multiple fixing frames 301 to expand in its own arc direction until each fixing frame 301 reaches the position of the ventricular wall and is connected to the ventricular wall through the anchor thorn 302. The anchor thorn 302 can ensure the overall anchoring of the fixing base 300, improve the overall stability of the fixing base 300, and realize the adaptability of the fixing base 300 to heart chambers of different sizes and shapes.

[0048] like Figure 5 As shown, in a preferred embodiment of the present invention, the fixed base 300 includes an arc frame 303, a fixing member 304 and anchoring spikes 302; the two ends of the arc frame 303 are respectively connected to the connecting waist 201 and the fixing member 304, and a hollow cavity for expansion is formed inside the arc frame 303; the anchoring spikes 302 are arranged at intervals along the circumferential direction of the arc frame 303.

[0049] In this embodiment, the arc frame 303 can be used as a closed cage structure, that is, the arc frame 303 forms a hollow cavity by connecting the waist 201 and the fixing piece 304, and the anchor 302 is fixed to the outer wall of the arc frame 303 away from the hollow cavity. When the conveyor drives the balloon 500 through the hollow channel into the hollow cavity, the balloon 500 can better exert an expansion force on the inner wall of the arc frame 303, thereby improving the fit and adaptability of the arc frame 303 to the implantation site.

[0050] like Figure 6 As shown, in a preferred embodiment of the present invention, the arc frame 303 is connected to the waist 201 and the fixing member 304 in an integrally woven manner.

[0051] In this embodiment, the weaving starting point of the isolation umbrella body 100 and the fixed base 300 can be the connection waist 201 as the starting point, that is, all the elastic wires of the isolation umbrella body 100 and all the elastic wires of the fixed base 300 are concentrated at the connection waist 201, and the isolation umbrella body 100 and the fixed base 300 are woven by the elastic wires. Furthermore, since the isolation umbrella body 100 and the fixed base 300 are woven by the elastic wires in sequence, based on the characteristics of the elastic wires, when the fixed base 300 is implanted, the expansion of the balloon 500 can make the elastic wires expand radially, and the anchor thorns 302 outside the arc frame 303 can be connected to the ventricular wall; and the weaving characteristics of the elastic wires make the isolation umbrella body 100 store a certain stress as the heart contracts during the diastole of the heart, and can exert a force on the inside of the heart during the diastole of the heart to promote the diastole of the heart.

[0052] The present embodiment provides a delivery device for use with the cardiac volume reduction implant, comprising: a delivery rod 400 and a balloon 500; the balloon 500 is located at the end of the delivery rod 400, and the delivery rod 400 can pass through the hollow channel so that the balloon 500 can be accommodated inside the fixed base 300, and the balloon 500 is used to adjust the expansion shape of the fixed base 300.

[0053] In this embodiment, the conveyor serves as a structure adapted to the cardiac volume reduction implant, and the conveyor can penetrate the hollow channel of the connecting mechanism 200. At the same time, the balloon 500 can be accommodated inside the fixed base 300, and the conveying rod 400 can ensure the delivery and recovery of the connecting nut 202 by means of a threaded connection. By appropriately expanding the balloon 500, the height and diameter of the fixed base 300 can be adjusted to achieve fixation of the fixed base 300 to the ventricular wall.

[0054] Optionally, a sealing screw can be provided at the end of the delivery rod 400. The delivery rod 400 can be detachably connected to the sealing screw by a clamp. The sealing screw can be screwed into the hollow channel through the connecting nut 202 during the installation process. When the balloon 500 completes the expansion operation on the fixed base 300, the sealing screw can form a threaded connection with the connecting nut 202 during the withdrawal of the delivery rod 400. At this time, the delivery rod 400 is separated from the sealing nut by the clamp. The sealing nut can close the hollow channel of the connecting nut 202 after the conveyor is withdrawn.

[0055] In a preferred embodiment of the present invention, the delivery rod 400 is provided with an external thread, and the delivery rod 400 is connected to the internal thread of the connection mechanism 200 via the external thread.

[0056] Specifically, before implantation, the delivery device and the cardiac volume reduction implant are first pre-installed in vitro, and the delivery rod 400 of the delivery device is connected to the connecting nut 202 through an external thread. The delivery rod 400 can place the cardiac volume reduction implant in the delivery sheath through the connecting nut 202, and can also ensure the pushing and withdrawal of the delivery sheath. When the cardiac volume reduction implant arrives at the implantation site along with the delivery sheath, the delivery rod 400 is fixed, and the delivery sheath is withdrawn to the position of the connection waist 201 of the cardiac volume reduction implant. At this time, the fixed base 300 is in an incompletely expanded state, and the fixed base 300 has no contact with the myocardial wall. The balloon 500 is expanded to appropriately expand the fixed base 300, so that the anchor 302 on the fixed base 300 is fixed to the myocardial wall. After confirming that the implantation is stable, the delivery rod 400 is rotated to disengage the external thread and the connecting nut 202, and the delivery rod 400 is withdrawn.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A cardiac volume reduction implant, It is characterized in that include: An isolation umbrella body (100), a connecting mechanism (200) and a fixing base (300); The isolation parachute body (100) is connected to the fixed base (300) via the connection mechanism (200); the connection mechanism (200) has a hollow passage for a conveyor to pass through; the conveyor can pass through the isolation parachute body (100) and the hollow passage in sequence; and the fixed base (300) can expand and support the interior of the heart cavity under the action of the conveyor.

2. The cardiac volume reduction implant according to claim 1, It is characterized in that The connecting mechanism (200) comprises a connecting waist (201); The connecting waist (201) is located between the isolation umbrella body (100) and the fixed base (300); the isolation umbrella body (100) expands outwards with the connecting waist (201) as the center; and the fixed base (300) expands toward a side away from the isolation umbrella body (100) with the connecting waist (201) as the center.

3. The cardiac volume reduction implant according to claim 2, It is characterized in that The connecting mechanism (200) further comprises a connecting nut (202); The connecting nut (202) is located inside the isolation parachute body (100), and the connecting nut (202) is connected to the connecting waist (201), and the connecting nut (202) and the connecting waist (201) penetrate to form the hollow channel.

4. The cardiac volume reduction implant according to claim 2, It is characterized in that The fixed base (300) comprises a plurality of fixed frames (301); The plurality of fixing frames (301) are arranged at intervals in the circumferential direction with the connecting waist (201) as the center, each fixing frame (301) is arranged in an arc shape, and the plurality of fixing frames (301) can expand with the connecting waist (201) as the center.

5. The cardiac volume reduction implant according to claim 4, It is characterized in that The fixed base (300) further comprises an anchor barb (302); A plurality of anchor spikes (302) are arranged on a side of each fixing frame (301) away from the isolation parachute body (100), and the plurality of anchor spikes (302) are arranged at intervals along the arc-shaped bottom to the end of the fixing frame (301).

6. The cardiac volume reduction implant according to claim 2, It is characterized in that The fixed base (300) comprises an arc-shaped frame (303), a fixing member (304) and an anchor barb (302); The two ends of the arc-shaped frame (303) are respectively connected to the connecting waist (201) and the fixing member (304), and a hollow cavity for expansion is formed inside the arc-shaped frame (303); The anchor spikes (302) are arranged at intervals along the circumferential direction of the arc-shaped frame (303).

7. The cardiac volume reduction implant according to claim 6, It is characterized in that The arc-shaped frame (303) is integrally woven and connected from the connecting waist (201) to the fixing member (304).

8. The cardiac volume reduction implant according to any one of claims 1 to 7, It is characterized in that The isolation umbrella body (100) is a double-layer skeleton structure or a woven structure.

9. A delivery device for use with the cardiac volume reduction implant according to any one of claims 1 to 8, It is characterized in that include: A delivery rod (400) and a balloon (500); The balloon (500) is located at the end of the delivery rod (400), and the delivery rod (400) can pass through the hollow channel so that the balloon (500) is accommodated inside the fixed base (300). The balloon (500) is used to adjust the expansion shape of the fixed base (300).

10. The conveyor according to claim 9, It is characterized in that The delivery rod (400) is provided with an external thread, and the delivery rod (400) is connected to the internal thread of the connection mechanism (200) via the external thread.

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