Occluder

A occluder and heart technology, applied in medical science, prosthesis, etc., can solve the problems of patients with hemolysis reaction, large rejection reaction, and weakened occlusion effect, so as to reduce the possibility of hemolysis and immune rejection reaction, reduce the Cross-section diameter, the effect of ensuring the plugging effect

Inactive Publication Date: 2012-12-05
SHANGHAI SHAPE MEMORY ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] First, the polyester fiber membrane cannot form an immediate occlusive effect and can cause hemolytic reactions in patients
[0006] Furthermore, due to the variety of materials implanted in the body, the human body’s rejection of polyester fiber membranes is greater than that of nickel-titanium alloys, and patients are prone to aseptic inflammation.
Therefore, postoperative patients need to take medicine for a long time, which increases the cost of treatment for patients.
[0007] Third, the blood of some patients has a strong ability to dissolve the polyester fiber membrane, and the connective tissue adhering to the surface of the cardiac occluder has not yet fully formed, and the polyester fiber membrane is partially dissolved, resulting in weakened occlusion effect
Therefore, this will lead to a large number of patients losing the best treatment opportunity and losing the chance of survival

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0027] see figure 1 , image 3 with Figure 4 , when the delivery device transports the heart occluder to a designated position and releases it, the heart occluder returns to a preset shape under the action of the surface tension of the patient's blood, and completes occlusion of the patient's defect. By using the delivery device, it is possible to prevent damage to the material of the cardiac occluder, and also prevent damage to the patient's blood vessel wall. A heart occluder of the present invention includes a stent 1 and a metal sheath 2 , and the stent 1 includes discs 12 located at both ends of the stent 1 and a waist 11 located between the two discs 12 . In this embodiment, the waist 11 is a cylinder. The disc 12 is umbrella-shaped or mushroom-shaped. The stent 1 is braided with nickel-titanium alloy wire and has a single-layer mesh structure. The nickel-titanium alloy wire is fixed at the center of the disk 12 at both ends of the bracket 1 to form a nickel-titani...

no. 2 example ;

[0032] see figure 1 , image 3 with Figure 5 , a heart occluder in this embodiment includes a bracket 1 and a metal sheath 2, the bracket 1 includes discs 12 at both ends of the bracket 1 and a waist 11 between the two discs 12, the center of the two discs 12 Metal sleeves 2 are provided respectively, and the metal sleeves 2 are made of 316L stainless steel. The stent 1 is braided by at least 144 nickel-titanium alloy wires. Since the polyester fiber membrane is removed from the inside of the bracket 1, the inside of the bracket 1 is empty. In this embodiment, the disc 12 is umbrella-shaped or mushroom-shaped. The waist 11 is a cylinder, which includes a double-layer mesh structure.

[0033] The purpose of setting the double-layer mesh structure on the waist 11 is to enhance the surface tension of the waist 11 in the patient's blood. After the cardiac occluder is released from the delivery device, it can quickly return to the preset shape and enter the defect of the pat...

no. 3 example

[0035] see figure 1 , image 3 with Image 6 In this embodiment, a heart occluder includes a bracket 1 and a metal sheath 2. The bracket 1 includes discs 12 located at both ends of the bracket 1 and a waist 11 located between the two discs 12. The disc 12 is Umbrella or mushroom shape, the waist 11 is a cylinder. A metal sleeve 2 is arranged at the center of the two discs 12, and the metal sleeve 2 is made of 316L stainless steel. The stent 1 is braided by at least 144 nickel-titanium alloy wires. Since the polyester fiber membrane is removed from the inside of the bracket 1, the inside of the bracket 1 is empty. In this embodiment, both the waist portion 11 and the disk 12 include a double-layer mesh structure.

[0036] Both the waist 11 and the disc 12 are provided with a double-layer mesh structure to strengthen the surface tension of the waist 11 and the disc 12 in the patient's blood. After the cardiac occluder is released from the delivery device, it can quickly re...

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PUM

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Abstract

The invention discloses an occluder for treating congenital heart diseases. The occluder comprises a support and metal sleeves. The support comprises disks located at two ends of the support and a waist located between the disks. The support with a mesh structure and a hollow interior is braided by shape memory alloy metal wires. The metal sleeves are disposed at the centers of the two disks. Since polyester fiber membrane in the support is removed, possibility of hemolysis and immunological rejection of a patient is reduced, occlusion effectiveness of the occluder is guaranteed, section diameter of the occluder entering a conveyer is reduced, and optimal treating opportunities are provided for more patients.

Description

technical field [0001] The invention relates to a heart occluder for treating congenital heart disease. Background technique [0002] Congenital heart disease includes patent ductus arteriosus (PDA), patent foramen ovale (PFO), atrial septal defect (ASD) and ventricular septal defect (VSD). PDA can cause blood to flow between the aorta and pulmonary arteries. PFO and ASD can cause blood to flow between the left and right atrium. A VSD can cause blood to flow between the left and right ventricles. When there is a lot of traffic, it generally needs to be repaired. Since the 1970s, the interventional therapy of blocking the defect site of the heart through a cardiac occluder has been widely promoted. [0003] The traditional heart occluder includes: a stent braided by nickel-titanium alloy wire, a medical stainless steel sheath, a polyester fiber membrane and sutures. The bracket includes: discs at two ends of the bracket and a waist between the two discs. The nickel-tita...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/02
Inventor 张昱昕钱卫东杨川川
Owner SHANGHAI SHAPE MEMORY ALLOY
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