Unlock instant, AI-driven research and patent intelligence for your innovation.

Occluder, its preparation method and occluding system

An occluder and head technology, applied in medical science, surgery, etc., can solve the problems of poor release position, failure of surgery, prolonged operation time, etc.

Active Publication Date: 2020-11-17
LIFETECH SCI (SHENZHEN) CO LTD
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order not to significantly increase the radial dimension of the occluder after stretching, the size of the marking structure is usually small, and the marking structure is only set locally on the occluder, so it is still difficult to judge the occluder during implantation. The overall shape and position may lead to prolonged operation time, poor shape of the release position and even failure of the operation, causing serious consequences

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Occluder, its preparation method and occluding system
  • Occluder, its preparation method and occluding system
  • Occluder, its preparation method and occluding system

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0077] Further, a preparation method of an occluder is provided, comprising the steps:

[0078] Step 110: Provide the occlusion frame.

[0079] The blocking frame is a mesh structure woven from braided silk. The two free ends of the braided wire of the blocking frame are respectively fixed with a first sealing head and a second sealing head.

[0080] Step 120: Coat the occlusion frame with a film to form a bag-like structure with an opening.

[0081] In one embodiment, the leaching method is used to form a film covering the blocking frame. First, an extraction solution is prepared, and the solute of the extraction solution is the material that forms the coating. In one embodiment, the solute of the leachate is a degradable polymer. The degradable polymer is dissolved in the solvent to obtain the leachate.

[0082] After immersing the entire plugging frame in the leaching solution for a certain period of time, the plugging frame is slowly lifted out of the leaching solutio...

Embodiment 1

[0101] A group of 20 parallel-arranged poly-L-lactic acid (PLLA) braided filaments with a wire diameter of 0.40 mm were used as the longitude braided silk and a group of 20 parallel-arranged poly-L-lactic acid (PLLA) braided wires with a wire diameter of 0.40 mm were used as the latitude. The braided wire is interlaced up and down, and the two free ends of the braided wire are fixed with the first head and the second head, so as to form a braided net, and the braided net is heat-set to form a blocking frame, and the blocking frame includes the first blocking unit, the second blocking unit, and the waists respectively connecting the first blocking unit and the second blocking unit, the first sealing head is located on the first blocking unit, the second sealing head is located on the second blocking unit, and the blocking The grid size of the frame is 10mm 2 .

[0102] Polyracemic lactic acid (PDLLA) was dissolved in acetonitrile to prepare a leaching solution with a concentra...

Embodiment 2

[0104] A group of 30 parallel-arranged poly-L-lactic acid (PLLA) braided filaments with a wire diameter of 0.10 mm were used as the longitude braided silk and a group of 30 parallel-arranged poly-L-lactic acid (PLLA) braided wires with a wire diameter of 0.10 mm were used as the latitude. The braided wire is interlaced up and down, and the two free ends of the braided wire are fixed with the first head and the second head, so as to form a braided net, and the braided net is heat-set to form a blocking frame, and the blocking frame includes the first blocking unit, the second blocking unit, and the waists respectively connecting the first blocking unit and the second blocking unit, the first sealing head is located on the first blocking unit, the second sealing head is located on the second blocking unit, and the blocking The grid size of the frame is 16mm 2 .

[0105] Polyracemic lactic acid (PDLLA) was dissolved in acetone to prepare a saturated polyracemic lactic acid solut...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to an occluder comprising an occluding frame and a covering film. The occluding frame is of a mesh structure, and the covering film completely covers the occluding frame to forma sac structure having an opening. During implantation, a liquid contrast agent is injected into the sac structure through the opening of the sac structure, so that the entire sac structure can be visualized under an X-ray imaging device, and thus the overall shape of the occluder can be determined.

Description

technical field [0001] The invention relates to the field of interventional medical devices, in particular to an occluder, a preparation method thereof and an occlusion system. Background technique [0002] Atrial Septal Defect (ASD), Ventricular Septal Defect (VSD) and Patent Ductus Arteriosus (PDA) are common congenital heart defects. In recent years, cardiac defect occluders (hereinafter referred to as occluders) have been widely used in the interventional treatment of congenital heart defects such as ASD and VSD. Cardiac defect occluder interventional therapy has the advantages of minor trauma, safe and quick operation, and accurate short- and medium-term curative effects. [0003] The occluder generally includes an occlusion frame with a mesh structure and a flow blocking membrane fixed inside the occlusion frame by sutures. The treatment principle of the occluder is as follows: the occluder is delivered to the patient's heart defect through an interventional operatio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/00
Inventor 王禹都陈贤淼
Owner LIFETECH SCI (SHENZHEN) CO LTD