CN205126332U - Damaged plugging device of degradable heart - Google Patents

Abstract

The utility model relates to the technical field of medical devices, in particular to a heart defect occluder, in particular to a bioabsorbable heart defect occluder. The cardiac defect occluder is made of bioabsorbable materials, and the occluder includes a support frame, a velvet umbrella, and an occluder membrane. It is composed of five parts: supporting frame, fluff umbrella, sealing membrane, waist and connecting head. The waist is an arc-shaped recessed part of fluff. The heart defect occluder of the utility model does not immediately and completely separate the defect after the defect occlusion operation is completed, but as the surface of the occluder becomes endothelial, the affected part is slowly repaired, which reduces the patient's stubbornness caused by pulmonary hypertension. The possibility of acute right heart failure or even sudden death, and then the occluder will be absorbed by the human body and will not stay in the human body for a long time, avoiding arrhythmia: including side effects such as atrial fibrillation and conduction block, and the metal occluder wears the atrial free wall Long-term complications will result.

Description

A degradable heart defect occluder

technical field

The utility model relates to the technical field of medical devices, in particular to a biodegradable heart defect occluder.

Background technique

Atrial defect (hereinafter referred to as ASD) or ventricular defect (VSD) is a kind of congenital heart disease. The mechanism of its lesion is that the septum between the left and right ventricles or atria fails to close normally. To enable blood to flow in a room or room. Since the pressure of the left atrium is higher than that of the right atrium, part of the blood from the left atrium flows into the right atrium, resulting in a decrease in blood flow in the systemic circulation and lesions in related organs of the pulmonary circulation. At present, most of the methods for the treatment of cardiac septal defect are interventional therapy, that is, the occluder is sent to the patient's cardiac focus through a catheter or guide wire through the femoral artery or jugular vein to block and complete the treatment.

Most of the currently marketed occluder structures are mesh or metal spring stents braided by non-degradable metal wires. It has been proven to have a good early and mid-term curative effect, but long-term complications cannot be ignored, such as the force of the occluder affecting the natural beating of the heart, causing arrhythmia, conduction block, metal nickel allergy, etc. There is no long-term follow-up data. After the occluder is implanted into the human body, its surface will be completely endothelialized, and its own tissues will achieve a good occlusion effect, and the original occluder does not need to remain in the body at all.

At present, there is no fully degradable occluder on the market, and none of them can be absorbed by the human body after the treatment is completed, which may cause complications in the long run.

The occluders currently on the market completely block the lesion immediately after implantation, which may cause pulmonary hypertension, intractable right heart failure or even sudden death.

The utility model provides an absorbable heart defect occluder for slowly occluding the affected part of the defect.

Utility model content

(1) Technical problems to be solved

The technical problem to be solved by the utility model is to solve the problem that when the heart defect occluder is implanted into the human body, the pulmonary artery pressure may increase due to instantaneous complete occlusion, resulting in intractable right heart failure or even sudden death; and the metal occluder is implanted into the human body Afterwards, some long-term complications and side effects are caused, and the operation is simple.

(2) Technical solution

In order to solve the technical problem, a heart defect occluder is provided, which includes a support frame, a villi umbrella, an occlusion membrane, and a connector, the support frame is cylindrical, and the villi umbrella The fluff is embedded in the support frame, and the waist is a concave part with a certain range.

Wherein, the left and right ends of the supporting frame are each punched with a few circles of small circular holes, the fluff is implanted in it, and the two sealing films are respectively arranged on the left and right fluff umbrella pieces or are respectively wrapped with the sealing membranes. stand up.

Wherein, the support frame, the fluff umbrella, the sealing membrane and the connector are all made of biodegradable polymer materials.

Wherein, the biodegradable polymer material is racemic polylactic acid, L-polylactic acid, polycaprolactone, polyglycolide, polylactide-glycolide or poly-L-lactide-glycolide trimethylene carbonate ester copolymer.

Wherein, the waist is formed by implanting the supporting skeleton with villi, and the shape of the concave part is arc-shaped, rectangular, triangular or other shapes.

Wherein, the occlusion membrane is fixed on the villi and the supporting frame by suture or laser welding technology.

Wherein, the waist fluff and sutures are made of biodegradable polymer materials.

Wherein, the number of said depressions is 1 or more.

(3) Beneficial effects

The beneficial effects of the present invention are: the sealing membrane used has a certain liquid-permeable performance, which can ensure that the pressure difference between the left and right sides of the heart will not be too high, and the fluff on the waist can increase the friction between the instrument and the defect and reduce the sealing In order to avoid the possibility of device displacement, the sealing membrane is set in the middle of the left and right villi umbrellas, so that the sealing membrane can completely cover the defect. The fluffy umbrella has good elasticity and can be completely withdrawn after the blockage is unsuccessful. The heart defect occluder of the present invention is made of biodegradable polymer materials. After the lesion is endothelialized, the occluder will be completely degraded to avoid side effects caused by non-degradable materials.

Description of drawings

Accompanying drawing 1 is the appearance structure diagram when the degradable heart defect occluder of the embodiment of the utility model is opened;

Accompanying drawing 2 is the top view and the left side view of the degradable cardiac occluder bracket of the embodiment of the present invention;

Accompanying drawing 3 is the A-A sectional view of the degradable heart occluder of the utility model embodiment;

Accompanying drawing 4 is the B-B sectional view of the degradable cardiac occluder of the embodiment of the utility model.

In the figure: 1: supporting frame; 2: fluff umbrella piece; 3: sealing membrane; 4: waist; 5: connecting head.

detailed description

The specific implementation of the present utility model will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

As shown in Figure 1-4, the heart occluder provided by the example of the present invention, the heart defect occluder includes a supporting frame (1), a villi umbrella (2), a occluding membrane (3), a waist (4) . Connecting head (5), the support frame (1) is a columnar body, the fluff of the fluff umbrella (2) is embedded in the support frame (1), and the waist (4) is a depression A-A with a certain range, B-B.

The left and right ends of the support frame (1) are punched with a few circles of small circular holes, and the fluff is implanted in it, and the two sealing films (3) are respectively arranged on the left and right fluff umbrella pieces (2) or sealed with Blocking film (3) all wraps up two umbrella slices.

The velvet umbrella (2) and the sealing film (3) of the occluder of the utility model can be smoothly opened, and at the same time, the retraction of the velvet umbrella (2) and the sealing film (3) can also be realized.

The blocking membrane (3) is fixed on the villi umbrella (2) by sutures or laser welding, and is fixed on the support frame (1).

The connecting head (5) is thread formed by precision carving and is connected with special conveying equipment to open or retract the umbrella piece.

The support frame (1), fluff umbrella (2), occluding membrane (3), waist (4), connector (5) and sutures are all made of biodegradable polymer materials. Preferably, the supporting frame (1), fluff umbrella (2), occluding membrane (3), waist (4) and connector (5) are made of racemic polylactic acid (PDLLA), poly-L-lactic acid (PLLA) ), polycaprolactone (PCL), polyglycolide (PGA), polylactide-glycolide (PGLA) or poly-L-lactide-glycolide trimethylene carbonate copolymer (PTLGA).

The waist (4) is set as a concave circular arc or triangle or rectangle with fluff, and there can be one or several concave parts, and the heart defect occluder of the present invention is made of biodegradable polymer materials, so that the occlusion After tissue cells intima on their outer surface, the organ is degraded into small molecules to be absorbed by the body.

Therefore, the heart defect occluder of the utility model is that the fluffy umbrella (2) is fixed on the left and right ends of the support frame (1), and the waist (4) is arc-shaped or concave in other shapes. After the occluder completes its mission, it will be completely degraded in the human body, avoiding many side effects caused by non-degradable materials.

The above is only a preferred embodiment of the utility model, and it should be pointed out that for those of ordinary skill in the art, some improvements and modifications can be made without departing from the technical principle of the utility model. These improvements and modifications should also be within the protection scope of the present utility model.

Claims (8)

1. A heart occluder, characterized in that: it includes a supporting frame (1), a villi umbrella (2), an occluding membrane (3), a waist (4) and a connecting head (5), and the supporting frame ( 1) is a columnar body, the fluff of the fluff umbrella (2) is embedded in the support frame (1), and the waist (4) is a concave part with a certain range. 2. The cardiac occluder according to claim 1, characterized in that: the left and right ends of the supporting frame (1) are punched with several circles of small circular holes, and the villi are implanted in it, and the two occluding membranes (3) respectively set on the left and right fluffy umbrella pieces (2) or respectively wrap the two umbrella pieces with the sealing film (3). 3. The cardiac defect occluder according to claim 1, characterized in that: the supporting frame (1), the villi umbrella (2), the occluding membrane (3), the waist (4) and the connecting head (5 ), all made of biodegradable polymer materials. 4. The cardiac defect occluder according to claim 3, characterized in that: said biodegradable polymer material is racemic polylactic acid, L-polylactic acid, polycaprolactone, polyglycolide, polylactide Ester-glycolide or poly-L-lactide-glycolide trimethylene carbonate copolymer. 5. The heart defect occluder according to claim 1, characterized in that: the waist (4) is formed by implanting the supporting skeleton (1) with villi, and the shape of the concave part is arc-shaped or rectangular or triangular or other shapes . 6. The cardiac defect occluder according to claim 1, characterized in that: the occluding membrane (3) is fixed on the villi and the supporting frame (1) by suture or laser welding technology. 7. The heart defect occluder according to claim 6, characterized in that: the villi and sutures at the waist (4) are made of biodegradable polymer materials. 8. The heart defect occluder according to claim 5, characterized in that: the number of said depressions is one or more.