Machining method of micropore catheter

A processing method and catheter technology, which is applied in the field of medical devices, can solve problems such as inability to accurately control the flow of liquid medicine, inability to process microporous catheters, and uneven hole sizes in microporous catheters.

Active Publication Date: 2017-08-11
ZHEJIANG FERT MEDICAL DEVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The microporous catheter connected to the infusion pump is an important part to control the flow of the liquid medicine. The uneven size of the inner hole of the microporous catheter cannot accurately control the flow of the liquid medicine
[0003] The existing extrusion process cannot process microporous catheters with a micropore diameter of 0.05-0.20mm, and a new microporous catheter molding method is urgently needed, so that a microporous structure with a pore diameter of 0.05-0.20mm can be formed in the catheter, and the microporous The pore size is uniformly controlled, and the micropores will not be blocked

Method used

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  • Machining method of micropore catheter

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of processing method of microporous catheter

[0020] 1. Material preparation: Select the steel wire with the same pore size as the required micropore, and carry out siliconization treatment on the surface of the steel wire. The siliconization process is as follows: use medical-grade needle-point silicone oil, that is, medical-grade dimethyl silicone oil (Dow Corning, USA), and dilute it with After the agent HCFC141B is diluted to a concentration of 2%, it is directly filled into the spray tank and sprayed on the surface of the steel wire; or it is directly dipped and smeared for siliconization treatment; after completion, the steel wire is dried by a drying device at a drying temperature of 70°C , time 10S;

[0021] 2. Co-extrusion processing: the steel wire and polymer material after surface silicification are co-extruded, so that the surface of the steel wire is covered with polymer material, that is, the steel wire is implanted in the center of the catheter; ...

Embodiment 2

[0025] A kind of processing method of microporous catheter

[0026] 1. Material preparation: Select the steel wire with the same pore size as the required micropore, and carry out siliconization treatment on the surface of the steel wire. The siliconization process is as follows: use medical-grade needle-point silicone oil, that is, medical-grade dimethyl silicone oil (Dow Corning, USA), and dilute it with After the agent HCFC141B is diluted to a concentration of 20%, it is directly filled into the spray tank and sprayed on the surface of the steel wire; or it is directly dipped and smeared for siliconization treatment; after completion, the steel wire is dried by a drying device at a drying temperature of 100°C , time 5S;

[0027] 2. Co-extrusion processing: the steel wire and polymer material after surface silicification are co-extruded, so that the surface of the steel wire is covered with polymer material, that is, the steel wire is implanted in the center of the catheter;...

Embodiment 3

[0031] A kind of processing method of microporous catheter

[0032] 1. Material preparation: Select the steel wire with the same pore size as the required micropore, and carry out siliconization treatment on the surface of the steel wire. The siliconization process is as follows: use medical-grade needle-point silicone oil, that is, medical-grade dimethyl silicone oil (Dow Corning, USA), and dilute it with After the agent HCFC141B is diluted to a concentration of 5%, it is directly filled into the spray tank and sprayed onto the surface of the steel wire; or it is directly dipped and smeared for siliconization treatment; after completion, the steel wire is dried by a drying device at a drying temperature of 85°C , time 7S;

[0033] 2. Co-extrusion processing: the steel wire and polymer material after surface silicification are co-extruded, so that the surface of the steel wire is covered with polymer material, that is, the steel wire is implanted in the center of the catheter;...

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Abstract

The invention relates to the technical field of medical instruments, in particular to a forming process of a micropore catheter, and aims at providing a machining method of the micropore catheter. According to the machining method, a micropore structure can be formed, micropores are uniform in size, and the micropores are not likely to be blocked. A steel wire and a polymer material are subjected to joint extrusion forming, the surface of the steel wire is coated with the polymer material, in other words, the steel wire is implanted in the center of the catheter, the micropores are formed after the steel wire is drawn out, the sizes of the micropores are controlled by controlling the diameter of the steel wire, meanwhile, the surface of the steel wire is spray-coated or soaked with medical silicon oil, the problems that due to the characteristics of materials, after the surface of a steel wire is wrapped by the materials, the materials easily adhere to the steel wire, and the steel wire cannot be drawn out are solved, the micropore structure can be formed in the catheter, the micropores are uniform in size, and the walls of the micropores are smooth and free of adhesion.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a forming process of a microporous catheter. Background technique [0002] The infusion pump used for clinical micro-infusion therapy uses the tension of the silicon capsule as the power to restrict the flow through the micropores of the capillary to achieve the purpose of uniform infusion. The microporous catheter connected to the infusion pump is an important part to control the flow of medicinal liquid, and the uneven size of the inner hole of the microporous catheter cannot accurately control the flow of medicinal liquid. [0003] The existing extrusion process cannot process microporous catheters with a micropore diameter of 0.05-0.20mm, and a new microporous catheter molding method is urgently needed, so that a microporous structure with a pore diameter of 0.05-0.20mm can be formed in the catheter, and the microporous The pore size is uniformly controlled, and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/02B29C47/92B29C47/94B29K23/00B29L31/00B29C48/92
CPCB29C48/09B29C48/154B29C48/92B29C48/94B29C2948/9259B29C2948/926B29C2948/92704B29K2023/083B29L2031/7542
Inventor 马建强朱磊峰苏卫东李慎贵沈钰琴祝尔加夏胜江
Owner ZHEJIANG FERT MEDICAL DEVICE
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