CN201082203Y - Heart defect occluder device - Google Patents

Abstract

The utility model relates to an intervention medical device, in particular to occlusion device for curing congenital heart disease. The heart defects occlusion device provided by the utility model comprises a network which is made by medical implant material. The expansion shape of the network is predefined. When the network is in predefined shape, the network comprises two umbrella atriums and a waist part which with less diameter at the middle. The end surface of the umbrella atriums are opening hollow. At least one of umbrella atriums are provided with equably distributed bearing wires at the hollow opening. Compared with prior art, the utility model comprises bearing wires at the hollow choking membrane of the far end umbrella atrium end surface, which can help reduce blood stream impact force on the choking membrane and also pressure on the two sides of the occlusion device, in order to avoid damage on the choking membrane and reduce the concave and the metal content inside human body.

Description

Heart defect occluder

technical field

The utility model relates to an interventional medical device, in particular to an occluder for treating congenital heart disease.

Background technique

The incidence of congenital heart disease (CHD) in the normal population is about 1% (0.6%-1.2%). According to the calculation of my country's 1 billion population, about 10 million people suffer from congenital heart disease. Children have a higher prevalence than adults. Congenital heart disease includes patent ductus arteriosus (PDA), patent foramen ovale (PFO), atrial septal defect (ASD) and ventricular septal defect (VSD). PDA may flow blood between the aorta and pulmonary artery, PFO and ASD may flow blood between the left atrium and right atrium, and VSD may flow blood between the left ventricle and right ventricle. More flow usually requires repair .

At present, various types of cardiac septal defect occlusion devices are used for the treatment of congenital heart diseases. These occlusion devices are sent to specific locations in the patient's heart through catheters or wires through the femoral vein or jugular vein. Among them, the occluder made of metal fiber is widely used. Figure 1 shows the state of use of the occluder in the heart. This type of occluder generally includes a support net with a preset shape of shrinkage performance, and the support net forms The left and right disks 2 and 3 and the waist 4 connecting the two disks have heads 21 and 32 on the disks, and the support net has a built-in flow-blocking film; as shown in Figure 2, the support net 1 of the occluder is elongated on the catheter In this process, the occluder is sent to the defective part of the patient's body through the blood vessel, and the occluder is released from the catheter. However, during this process, the head 21 of the left disc 2 of the occluder enters the left atrium in a protruding state, which may touch or damage the surrounding area. The ostium of the left pulmonary vein, the ostium of the coronary sinus, and the aortic valve of the left ventricle, as well as other intracardiac structures, caused serious injury. At the same time, it is difficult to accurately determine the size and shape of the defect hole under the existing technical conditions and operating methods. Due to the limitation of the waist size, it is more difficult for doctors to choose the type of occlusion device. If the size is too large, the waist of the occluder will be blocked. Compression of the cardiac septum makes the left and right disks bulge into a gourd shape, as shown in Figure 3, making the sealing head outside the metal support net more prominent, which may touch the surrounding tissues, resulting in serious consequences.

US2007/0043391 discloses a occluder, as shown in Figures 4 and 5, the distal end of the occluder is trumpet-shaped, and there is no head on the left disk surface, which not only solves the problem of the original occluder during use. Touching other tissues, head falling off, and thrombus problems caused by the head also reduce the metal content of the occluder, and greatly reduce the possibility of damage to surrounding tissues when the left disc of the occluder is sent to the defect position. However, we know that the pressure difference between the left ventricle and the right ventricle of ventricular septal defect is about 180 mm Hg, and the pressure difference between the aorta and pulmonary artery at the patent ductus arteriosus is about 70-100 mm Hg, if the choke membrane at the distal trumpet-shaped opening is directly impacted by the blood flow and bears the pressure difference of the blood flow at the defect, the possibility of rupture of the choke membrane will be increased, and at the same time in the blood Under the impact, the choke membrane is concave, and the concave part will still change the hemodynamics at the place, making it easy for thrombus to form, and the concave part will also affect the adhesion of tissues in the body.

Contents of the invention

The purpose of the utility model is to further improve the biocompatibility and sealing effect of the occluder whose end face is hollow and open.

The purpose of this utility model is achieved through the following technical solutions: the utility model heart defect occluder is composed of mesh partitions made of medically implantable materials, has a predetermined expanded shape, and includes two The canopy and the waist with a smaller diameter in the middle, and the end surface of the canopy are open and hollow, wherein the hollow opening of the at least one canopy is provided with evenly distributed receiving wires.

The uniformly distributed receiving wires of the utility model are arranged on the inner side of the flow blocking membrane at the end of the first canopy.

According to the utility model, the uniformly distributed connecting wires are sewed on the flow-blocking membrane of the first canopy.

The second umbrella house of the utility model is formed by connecting a mesh partition plate equipped with a connecting device with a hollow open umbrella house through a guide wire, and the end face of the second umbrella house can be open and hollow. A bolt head connected to the conveying system is installed on the mesh separation plate. Evenly distributed receiving wires are arranged on the inner side of the second umbrella house flow blocking membrane. The evenly distributed receiving wires are slit on the second umbrella house flow blocking membrane.

Compared with the prior art, the utility model is equipped with a connecting thread at the open and hollow choke membrane on the far-end umbrella surface, which helps the choke membrane to bear the blood flow momentum and the pressure on both sides of the occluder, and prevents the choke membrane from being damaged. breakage, less indentation. Silk can greatly reduce and reduce the metal content in the human body.

Description of drawings

Fig. 1 is the use state diagram of a kind of occluder in the prior art

Fig. 2 is a schematic diagram of the use process of the occluder shown in Fig. 1

Fig. 3 is a schematic diagram of a state of the occluder shown in Fig. 1

Fig. 4 is the schematic diagram of another kind of occluder in the prior art

Figure 5 is a schematic diagram of the occluder shown in Figure 3

Fig. 6 is a schematic diagram of the utility model embodiment 1

Fig. 7 is the schematic diagram of the utility model embodiment 2

Figure 8 is an enlarged view of the right disc surface of Embodiment 3 of the present utility model

Fig. 9 is a schematic diagram of the utility model embodiment 3 after dismantling the net partition

Detailed ways

The utility model is described in detail below by specific embodiment:

Figure 4 is an embodiment of the present utility model, the occluder 1 is made up of mesh partitions made of medically implantable materials, and has a predetermined expanded shape. When in the expanded shape, the occluder includes left and right umbrella chambers 2, 3 and The waist 4 with a smaller diameter in the middle, and the end face of the left canopy are open and hollow, and the hollow opening 22 is pierced with evenly distributed receiving wires 23 . When in use, the end face of the left umbrella house is provided with a flow-blocking film, and the connecting wire is located inside the flow-blocking film. A depression is formed on the bottom, and the receiving wires 23 evenly distributed at the opening are arranged on the inner side of the flow-stopping film to support the depressed flow-stopping film.

Alternatively, as shown in FIG. 5 , the receiving wire 23 is directly connected to the flow-blocking membrane 24 at the left end of the occluder to increase the pressure bearing capacity of the flow-blocking membrane at the hollow opening 22 on the left end surface and reduce the degree of depression. Certainly, the method that part of the receiving wire 23 is arranged inside the flow blocking film 24 and part of the receiving wire 23 is pierced on the flow blocking film 24 can be adopted at the same time.

The right umbrella end face 3 of the occluder shown in Figures 4 and 5, as shown in Figures 6, 7, 8, and 9, can be connected to the hollow opening 32 of the right umbrella by a mesh partition plate 35 through the guide wire 36 Connection constitutes, and the bolt head that is connected with conveying system is housed on the mesh spacer plate 35. The hollow opening 32 of the right canopy is provided with evenly distributed receiving wires 33 . During use, the receiving wire 33 is placed on the inside of the flow-blocking film on the end face of the canopy, or connected on the flow-blocking film. way on the membrane. When the occluder is implanted, it is connected to the conveyor through the screw device on the plug head, and then the occluder is delivered to the lesion with the help of the conveyor under the X-ray monitoring equipment. After the angle is adjusted, the occluder is released to occlude Plug the defect. When it is determined to release the occluder, first loosen one end of the guide wire 36, remove the guide wire, and then recover the metal disc 35 with the threaded device.

The end face of the occluder is hollow, which reduces the metal content of the occluder, and the receiving wires 23, 33 placed at the hollow openings 22, 32 enhance the pressure bearing performance of the flow-blocking film on the end face of the occluder. On the one hand, it helps to block flow The membrane bears the impact pressure of the blood flow, which further ensures the safety of the blocking membrane; on the other hand, it reduces the concave deformation of the blocking membrane when the occluder is used, making it easier for endothelial cells to attach and speed up the recovery of patients.

Claims (7)

1. heart defect stopper, but the net of being made by the medical science embedded material is every forming, has predetermined expanded configuration, comprise two umbrella rooms and middle waist when being in expanded configuration than minor diameter, umbrella room end face is open hollow, it is characterized in that: the hollow open place in described at least one umbrella room is provided with the equally distributed silk of accepting.

2. heart defect stopper according to claim 1 is characterized in that: the described equally distributed inboard that silk is located at the first umbrella room end choked flow film of accepting.

3. heart defect stopper according to claim 1 and 2 is characterized in that: the described equally distributed silk of accepting is worn and is sewn on the first umbrella room choked flow film.

4. heart defect stopper according to claim 1 is characterized in that: the second umbrella room is connected and composed every the umbrella room of dish by seal wire and hollow open by a net that connecting device is housed, and the second umbrella room end face can be open hollow.

5. heart defect stopper according to claim 4 is characterized in that: described net is equipped with the bolt head that is connected with induction system on dish.

6. heart defect stopper according to claim 5 is characterized in that: the described second umbrella room choked flow film inboard is provided with the equally distributed silk of accepting.

7. heart defect stopper according to claim 6 is characterized in that: the described equally distributed silk of accepting is worn and is sewn on the second umbrella room choked flow film.

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