Medical polyurethane catheter

A polyurethane and catheter technology, applied in catheters and other directions, can solve the problems of insufficient comprehensive performance, flattening the tube body, easy precipitation on the surface, etc., to avoid the twisting and knotting of the catheter, reduce arrhythmia, and improve the hardness and hardness.

Inactive Publication Date: 2013-06-05
广州健恩医疗设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the prior art uses barium sulfate polyurethane as a medical catheter, due to the different properties of different barium sulfate contents, the surface is easy to precipitate, and the overall performance is still insufficient. After softening in clinical practice, the tube is easily crushed by negative pressure. body

Method used

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  • Medical polyurethane catheter

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Embodiment Construction

[0012] The preparation of the medical polyurethane catheter of the present invention is to blend the polyurethane A and the polyurethane B according to the ratio of 7:3, and then extrude and form it through a precision extruder, so that the extruded catheter is stable and stable in size.

[0013] The barium sulfate component in the above-mentioned polyurethane A accounts for 20% of the total amount. The grade of this product is GMTPU01001A and its hardness is 55D.

[0014] The barium sulfate component in the above-mentioned polyurethane B accounts for 40% of the total amount. The grade of this product is GMTPU01002A and its hardness is 65D.

[0015] As a filler of polyurethane, barium sulfate improves the comprehensive performance of polyurethane.

[0016] The catheter is tested with a precision extruder. The main parameters include a temperature control system with 7 zones, a servo-controlled host speed, a precision blowing system, and a high-precision traction and cutting ...

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Abstract

The invention discloses a medical polyurethane catheter composed of blended materials of polyurethane comprising 20% of barium sulfate and polyurethane comprising 40% of barium sulfate. The polyurethane materials with different barium sulfate contents are mixed according to different ratios. With the method provided by the invention, prior defects such as catheter hardness and elasticity can both be solved. Bending is prevented during catheterization, and the catheter has the advantages of good elasticity and pressure resistance. When catheter body is softened, the catheter is prevented from being flattened.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a medical polyurethane catheter. Background technique [0002] Medical polyurethane catheter, mainly used for subclavian vein, widely used in clinical treatment, can be used for flow dynamics monitoring, total parenteral nutrition (TPN), central venous pressure measurement, rescue drug injection, malignant tumor chemotherapy, bone marrow transplantation, etc. diagnosis or treatment. In the infusion process, sometimes two or more types of liquids with different properties need to be delivered. Some liquids can be mixed together for delivery, but some liquids must be delivered separately or in other ways due to incompatibility of medicines. [0003] Retrieval of technical literature, including "Effect of Particle Fillers on Hydrolysis Resistance of Polyurethane Elastomers" (Luo Yongbiao, Pang Deguang, Li Fangjun, Hydraulic and Pneumatic, No. 6, 2005), "Research on Processi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L29/12A61L29/06A61L29/02
Inventor 邹和群李备成
Owner 广州健恩医疗设备有限公司
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