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3D-printed heart stent

A heart stent and 3D printing technology, which is applied in the field of medical devices, can solve the problems of inability to compensate for the loss of myocardial cells, and achieve the effects of satisfactory mechanical properties, low thermal energy consumption, and low printing temperature

Inactive Publication Date: 2021-07-02
郝治安
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although surgery and medical treatment improve the likelihood of survival, these interventions cannot compensate for the loss of cardiomyocytes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A 3D printed heart stent of the present invention comprises diphenylmethane diisocyanate, auxiliary agent, filler, lubricant, and stabilizer, and the 3D printed heart stent used for cardiac interventional surgery passes through diphenylmethane diisocyanate, Auxiliary agents, fillers, lubricants, and stabilizers are blended and dissolved, filtered and concentrated to obtain printing paste, and finally prepared for 3D printing. The toughening agent is one of silicone oil, stearic acid, oleic acid, stearic acid amide, and polyvinyl alcohol. The filler is one of quartz powder, calcium silicate, diatomaceous earth and superfine barium sulfate. The lubricant is one of polypropylene, polystyrene and polycarbonate. The stabilizer is tri(2.4-di-tert-butylphenyl) phosphite, tris(2,4-di-tert-butyl) phosphite, hindered phenol, bis(2,4-di-tert-butylphenol) One of pentaerythritol diphosphite. The weight components of the 3D printed heart stent for cardiac interventional surgery ar...

Embodiment 2

[0021] Diphenylmethane diisocyanate was dissolved in chloroform, and stirred at room temperature for 4 hours to obtain diphenylmethane diisocyanate solution;

[0022] Mix calcium silicate, polystyrene, tris(2,4-di-tert-butyl) phosphite and oleic acid, pour it into the previous diphenylmethane diisocyanate solution, add pure water, tripropylmethyl ether 2, 2-dimethoxypropane, after fully stirring and mixing, filter, concentrate at 60°C to a thick paste with a density of 1.5, put it into a high-speed vibrating ball mill and grind for 10 hours, and then use a constant temperature magnetic stirrer to stir at 50°C Mix evenly for 30 minutes, and the rotation speed is 1000 rpm during stirring to obtain printing paste.

[0023] Turn on the computer and printer, open the Solidwords2015 modeling software, connect the computer and the printer, put the prepared printing paste into the material tray, install the ink cartridge of the nozzle on the drawing device, and load the 3D model data ...

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PUM

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Abstract

The invention relates to the field of medical instruments, in particular to a 3D-printed heart stent. The 3D-printed heart stent comprises diphenylmethane diisocyanate, an auxiliary agent, a filling agent, a lubricating agent and a stabilizing agent. The 3D-printed heart stent for an cardiac interventional operation is prepared by blending and dissolving the diphenylmethane diisocyanate, the auxiliary agent, the filling agent, the lubricating agent and the stabilizing agent, then conducting filtering and concentrating to obtain printing slurry, and finally, performing 3D printing preparation. The printing slurry is prepared by conducting blending, dissolving, compressing and the like on different components including the diphenylmethane diisocyanate, a flexibilizer and the filler, preparation is simple, economic and environment-friendly, and a foundation is laid for further 3D printing of the heart stent. The heart stent is printed through a 3D printing method, a needed printing temperature is low, heat energy consumption is low, and mechanical properties meet 3D printing requirements.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a 3D printed cardiac stent. Background technique [0002] Myocardial infarction results in the loss of heart muscle and the formation of non-contracting scar tissue. Although surgery and medical treatment improve the likelihood of survival, these interventions cannot compensate for the loss of cardiomyocytes. Therefore, there is a continuing need to seek new strategies to restore the structural and functional features of the damaged heart. [0003] In recent years, 3D printing technology has developed rapidly, and its practical application fields have gradually increased. 3D printing materials are an important material basis for the development of 3D printing technology. To some extent, the development of materials determines whether 3D printing can be used more widely. At present, 3D printing materials mainly include engineering plastics (such as ABS, PLA, PA), photosensitive r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L31/06A61L31/14B33Y70/10B33Y80/00
CPCA61L31/06A61L31/14B33Y70/00B33Y80/00C08L67/04
Inventor 郝治安
Owner 郝治安
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