Left ventricular wall tumor plugging device with adjustable skeleton

Abstract

The utility model discloses a left ventricular wall tumor plugging device with an adjustable framework. The left ventricular wall tumor plugging device comprises a base; the supporting rod is mounted on the base; the skeleton assembly is installed on the base and comprises a plurality of skeletons arranged on the periphery of the supporting rod, the skeletons are wrapped with separation membranes, and the end of each skeleton is provided with a left ventricular wall abutting clamping part; the adjusting assembly is installed on the supporting rod and can move in the axial direction of the supporting rod; one end of the connecting rod assembly is hinged to the adjusting assembly, the other end of the connecting rod assembly is hinged to the framework assembly, and the frameworks are driven by the adjusting assembly to expand towards the radial outer side of the supporting rod. According to the left ventricular wall tumor plugging device with the adjustable framework, the unfolding angle of the framework assembly can be adjusted according to the shape of a left ventricle, and safety and stability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a left ventricular aneurysm occluder with an adjustable frame. Background Art

[0002] After an acute myocardial infarction, myocardial damage and subsequent scarring lead to cardiac enlargement and heart failure, especially patients with anterior myocardial infarction and ventricular aneurysm are more likely to develop heart failure. In clinical practice in China, about 10% to 40% of myocardial infarction patients will develop ventricular aneurysm. In the past, ventricular aneurysm was treated through surgery, which required thoracotomy, was traumatic, had a high risk of infection, slow recovery, and poor prognosis, and not all patients could tolerate it. At the same time, if too much ventricular wall was removed, the heart cavity would become smaller, the surgical effect would be poor or even harmful, and this method and equipment required the cooperation of an experienced medical team to implement, which greatly increased labor costs.

[0003] Percutaneous ventricular reconstruction is a new treatment for patients with old anterior wall myocardial infarction and heart failure. This technology uses a minimally invasive interventional method to insert the occluder through the femoral artery and lower it to the apex of the left ventricle through a catheter. After the ventricular aneurysm is blocked, the connection with the occluder is disconnected by controlling the guidewire, and the heart does not need to be sutured.

[0004] Chinese patent CN 209048207 U discloses an enhanced ventricular aneurysm occlusion device, wherein a guide rod connection portion is provided on the base, and a plurality of skeletons radiate from the guide rod connection portion, and a layer of occluding film is covered on the skeletons. The ends of the skeletons extend out of the edge of the occluding film and are provided with anchor heads. When in use, the plurality of skeletons are in a fully expanded state, and the expansion angles of the plurality of skeletons cannot be adjusted according to the different shapes of the left ventricle, and the occluder is at risk of falling off.

[0005] In order to solve the above problems, we designed this utility model. Utility Model Content

[0006] The utility model aims to provide a left ventricular aneurysm occluder with an adjustable frame, which improves safety and stability.

[0007] Based on the above problems, the technical solution provided by the utility model is:

[0008] A left ventricular aneurysm occluder with an adjustable frame, comprising:

[0009] Base;

[0010] A support rod mounted on the base;

[0011] A skeleton assembly, which is mounted on the base, comprises a plurality of skeletons arranged on the periphery of the support rod, the plurality of skeletons are covered with a separation membrane, and the ends of the skeletons are provided with a left ventricular wall abutment fixing portion;

[0012] An adjustment assembly, which is mounted on the support rod and can move along the axial direction of the support rod;

[0013] A connecting rod assembly has one end hinged to the adjusting assembly and the other end hinged to the frame assembly, and driven by the adjusting assembly, the plurality of frames are expanded radially outward from the support rod.

[0014] In some embodiments, the base includes a rigid sleeve portion and a flexible support portion fixedly connected to the rigid sleeve portion, and the support rod and the skeleton assembly are fixed to the rigid sleeve portion.

[0015] In some embodiments, the support rod is a screw rod, and the adjustment assembly includes an adjustment sleeve sleeved on the support rod and a locking nut threadedly connected to the support rod, and a locking structure is provided between the locking nut and an end of the adjustment sleeve facing away from the base.

[0016] In some embodiments, the connecting rod assembly includes a plurality of connecting rods hinged to the adjusting sleeve, the number of the plurality of connecting rods is consistent with the number of the plurality of skeletons, and each connecting rod is hinged to a corresponding skeleton.

[0017] In some of the embodiments, a plurality of hinged protrusions are provided on the outer wall of the adjusting sleeve, a hinged groove for the frame to be inserted is formed between two adjacent hinged protrusions, and a hinged seat corresponding to each connecting rod is respectively provided on the multiple frames.

[0018] In some of the embodiments, the end of the locking nut facing away from the base is tapered and is provided with an operating hole for the operating guide wire to extend into.

[0019] In some embodiments, the locking structure includes a first locking tooth disposed on an end of the adjusting sleeve close to the locking nut and a second locking tooth disposed on the locking nut and matching the first locking tooth.

[0020] In some embodiments, the fixing portion is wavy and extends along the circumferential direction of the separation membrane, and the fixing portion can be folded to fit with the frame.

[0021] Compared with the prior art, the advantages of the utility model are:

[0022] (1) A support rod, an adjustment assembly and a connecting rod assembly are arranged between the base and the skeleton assembly, and the angle of the skeleton assembly can be adjusted according to the shape of the left ventricle so that the skeleton assembly fits firmly with the left ventricle to avoid the problem of falling off;

[0023] (2) The adjustment assembly includes an adjustment sleeve and a locking nut. The adjustment sleeve and the locking nut are locked with each other via a first locking tooth and a second locking tooth. When the angle of the frame assembly is adjusted, self-locking can be achieved to further prevent it from falling off;

[0024] (3) The fixing portion has a wavy structure, which can effectively increase the contact area between the frame and the left ventricle, while minimizing damage to the inner wall of the left ventricle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. The drawings described below are only some embodiments 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 It is a structural schematic diagram of an embodiment of a left ventricular aneurysm occluder with an adjustable frame according to the utility model;

[0027] Figure 2 This is one of the schematic diagrams of a partial structure (without the separation membrane) of an embodiment of the utility model;

[0028] Figure 3 This is a second schematic diagram of a partial structure (without the separation membrane) of an embodiment of the utility model;

[0029] Figure 4 for Figure 3 is a cross-sectional schematic diagram;

[0030] Figure 5 This is a third schematic diagram of a partial structure (without the separation membrane) of an embodiment of the utility model;

[0031] Figure 6 This is a schematic diagram of the matching structure of the adjusting sleeve and the locking nut in the embodiment of the utility model;

[0032] Figure 7 This is a schematic diagram of a folded state of an embodiment of the utility model;

[0033] Figure 8 This is a schematic diagram of the use state of an embodiment of the utility model;

[0034] in:

[0035] 1. Base 1-1, rigid sleeve part 1-2, flexible support part;

[0036] 2. Support rod;

[0037] 3. Frame; 3-1. Fixing part;

[0038] 4. Adjusting sleeve; 4-1. First locking tooth;

[0039] 5. Locking nut; 5-1. Second locking tooth; 5-2. Operating hole;

[0040] 6. Separator membrane;

[0041] 7. Connecting rod;

[0042] 8. Left ventricle;

[0043] 9. Articulated seat. DETAILED DESCRIPTION

[0044] The above scheme is further described below in conjunction with specific examples. It should be understood that these examples are used to illustrate the utility model and are not limited to the scope of the utility model. The implementation conditions used in the examples can be further adjusted according to the conditions of the specific manufacturer, and the implementation conditions not specified are usually the conditions in conventional experiments.

[0045] like Figures 1 to 5 As shown, an embodiment of the utility model is provided, which provides a left ventricular aneurysm occluder with an adjustable frame, including a base 1, a support rod 2 installed on the base 1, a frame assembly installed on the base 1, a separation membrane 6 wrapped around the circumference of the frame assembly, an adjustment assembly installed on the support rod 2, and a connecting rod assembly connecting the adjustment assembly and the frame assembly.

[0046] The base 1 includes a rigid sleeve portion 1-1 and a flexible support portion 1-2 fixedly connected to the rigid sleeve portion 1-1, a support rod 2 and a skeleton assembly are fixed to the rigid sleeve portion 1-1, the rigid sleeve portion 1-1 is made of biocompatible materials such as nickel-titanium alloy, and the flexible support portion 1-2 is made of biocompatible plastic material and can be folded. The support rod 2 is a screw and one axial end is fixed to the rigid sleeve portion 1-1.

[0047] The skeleton assembly is fixed on the rigid sleeve portion 1-1, and includes multiple skeletons 3 arranged on the periphery of the support rod 2. The skeletons 3 are made of biocompatible flexible metal material. The multiple skeletons 3 have a tendency to expand toward the periphery of the support rod 2. The separation membrane 6 is coated on the multiple skeletons 3 and forms an umbrella shape as the multiple skeletons 3 unfold.

[0048] A fixing portion 3-1 is provided at the end of the frame 3 to abut against the inner wall of the left ventricle 8. Specifically, the fixing portion 3-1 is wavy and extends along the circumferential direction of the separation membrane 6, which can increase the contact area between the frame 3 and the left ventricle 8 and also reduce damage to the inner wall of the left ventricle 8. The fixing portion 3-1 can be folded and attached to the frame 3, so that the occluder can be placed in the catheter and enter the left ventricle through the catheter.

[0049] The adjustment assembly is mounted on the support rod 2 and can move along the axial direction of the support rod 2. It includes an adjustment sleeve 4 sleeved on the support rod 2 and a locking nut 5 threadedly connected to the support rod 2. A locking structure is provided between the locking nut 5 and the end of the adjustment sleeve 4 away from the base 1. Figure 6 As shown, the locking structure includes a first locking tooth 4-1 arranged at one end of the adjusting sleeve 4 close to the locking nut 5 and a second locking tooth 5-1 arranged on the locking nut 5 and matching the first locking tooth 4-1. The first locking tooth 4-1 and the second locking tooth 5-1 are both stepped helical teeth. When the locking nut 5 is rotated to move toward the base 1, the second locking tooth 5-1 abuts against the first locking tooth 4-1 to drive the adjusting sleeve 4 to move axially along the support rod 2, thereby expanding the skeleton assembly toward the periphery.

[0050] In order to facilitate the limiting of the expansion angle of the skeleton assembly, the end of the locking nut 5 away from the base 1 is tapered, and at the same time, an operating hole 5-2 for the operating guide wire to be inserted is provided at the end. By operating the guide wire, the locking nut 5 is rotated and moved toward the base 1, and the locking nut 5 drives the adjusting sleeve 4 to move toward the base 1, so as to drive the connecting rod assembly to expand the skeleton assembly. When the locking nut 5 is rotated to move away from the base 1, the skeleton assembly has a tendency to shrink inward, pushing the connecting rod assembly, thereby pushing the adjusting sleeve 4 to move away from the base 1.

[0051] One end of the connecting rod assembly is hinged on the adjusting sleeve 4 and the other end is hinged on the frame assembly, and driven by the adjusting assembly, the multiple frames 3 are expanded radially outward of the support rod 2. Specifically, the connecting rod assembly includes multiple connecting rods 7 hinged to the adjusting sleeve 4, the number of the multiple connecting rods 7 is consistent with the number of the multiple frames 3, and each connecting rod 7 is hinged to the corresponding frame 3.

[0052] In this example, a plurality of hinged protrusions are provided on the outer wall of the adjusting sleeve 4 , and a hinged groove for the frame 3 to be placed therein is formed between two adjacent hinged protrusions. A hinged seat 9 corresponding to each connecting rod 7 is provided on the plurality of frames 3 .

[0053] The working principle of the utility model is:

[0054] The umbrella-shaped occluder can be folded and stowed (such as Figure 7As shown), the assembly is connected to the balloon through the operating hole 5-1 on the locking nut 5. After being folded and exhausted, it is inserted into the catheter that has entered the left ventricle 8 in advance. After reaching the predetermined location, the assembly extends from the end of the catheter to open the balloon. The locking nut 5 is rotated toward the base 1 by rotating the operating guide wire connected to the balloon. The locking nut 5 drives the adjusting sleeve 4 to move toward the base 1, and then drives the connecting rod 7 and the skeleton 3 to move, so that the skeleton assembly is expanded outward into an umbrella shape. When repositioning is required, the locking nut 5 is driven by the operating guide wire to move away from the base 1. Since the skeleton assembly has a tendency to retract inward, the connecting rod 7 is driven to rotate, so as to drive the adjusting sleeve 4 to move away from the base 1, so that the skeleton assembly is retracted to a certain angle. When the skeleton assembly is expanded to an appropriate angle, the fixing portion 3-1 contacts the inner wall of the left ventricle 8, and as the skeleton assembly continues to expand, it is in close contact with the wall of the left ventricle 8 to finally complete the occlusion of the ventricular aneurysm (as shown in FIG. Figure 8 ), followed by closing the balloon.

[0055] In summary, the occluder can adjust the deployment angle according to the shape of the left ventricle and come into close contact with the inner wall of the ventricle. At the same time, the angle-adjustable structure can achieve self-locking, improve stability and safety, and avoid problems such as falling off.

[0056] The above examples are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A left ventricular aneurysm occluder with an adjustable frame, characterized in that: include: Base; A support rod mounted on the base; A skeleton assembly, which is mounted on the base and includes a plurality of skeletons arranged on the periphery of the support rod, the plurality of skeletons are covered with a separation membrane, and the ends of the skeletons are provided with a fixing portion abutting against the wall of the left ventricle; An adjustment assembly, which is mounted on the support rod and can move along the axial direction of the support rod; A connecting rod assembly has one end hinged to the adjusting assembly and the other end hinged to the frame assembly, and driven by the adjusting assembly, the plurality of frames are expanded radially outward from the support rod.

2. The left ventricular aneurysm occluder with an adjustable frame according to claim 1, characterized in that: The base comprises a rigid sleeve portion and a flexible support portion fixedly connected to the rigid sleeve portion, and the support rod and the frame assembly are fixed to the rigid sleeve portion.

3. The left ventricular aneurysm occluder with an adjustable frame according to claim 2, characterized in that: The support rod is a screw rod, and the adjustment assembly includes an adjustment sleeve sleeved on the support rod and a locking nut threadedly connected to the support rod, and a locking structure is provided between the locking nut and an end of the adjustment sleeve away from the base.

4. The left ventricular aneurysm occluder with an adjustable frame according to claim 3, characterized in that: The connecting rod assembly includes a plurality of connecting rods hinged to the adjusting sleeve, the number of the plurality of connecting rods is consistent with the number of the plurality of skeletons, and each connecting rod is hinged to the corresponding skeleton.

5. The left ventricular aneurysm occluder with an adjustable frame according to claim 4, characterized in that: The outer wall of the adjusting sleeve is provided with a plurality of hinged protrusions, and a hinged groove for the frame to be placed is formed between two adjacent hinged protrusions. The plurality of frames are respectively provided with a hinged seat corresponding to each connecting rod.

6. The left ventricular aneurysm occluder with an adjustable frame according to claim 3, characterized in that: The end of the locking nut facing away from the base is tapered and is provided with an operating hole for the operating guide wire to extend into.

7. The left ventricular aneurysm occluder with an adjustable frame according to claim 3, characterized in that: The locking structure includes a first locking tooth disposed on an end of the adjusting sleeve close to the locking nut and a second locking tooth disposed on the locking nut and matching with the first locking tooth.

8. The left ventricular aneurysm occluder with an adjustable frame according to claim 1, characterized in that: The fixing portion is wavy and extends along the circumferential direction of the separation membrane. The fixing portion can be folded to fit with the frame.

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