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Composite dressing and negative pressure drainage device prepared therefrom

A solution and fiber mesh technology, applied in suction devices, bandages, drug delivery, etc., can solve the problems of high price, hardening, complicated porous structure process, etc., to overcome structural instability, high biological safety, and promote wound healing. Effect

Active Publication Date: 2022-04-15
ANSON NANO BIOTECH ZHUHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are two kinds of commonly used foam dressings: foamed polyvinyl alcohol and polyurethane foam. The production cost of foamed polyvinyl alcohol is relatively high, and the process of manufacturing porous structures is complicated. my country mainly relies on imports. In addition, foamed polyvinyl alcohol is easy to oxidize and harden Make the foam lose its elasticity and be scrapped; the polyurethane foam material is a reticulated open hydrophilic polyurethane foam structure with a pore size range of 400-600 microns, and its large number of holes is conducive to the drainage of the wound surface, but because the polyurethane foam material is foamed with chemical raw materials There are still some hidden dangers of toxic and side effects in the production solvent residue, and this type of foam dressing also has the problem of yellowing and hardening to varying degrees during storage
Most of the negative pressure drainage devices produced by importers are of fixed specifications and models, which are difficult to meet the needs of different wound locations and are very expensive. Therefore, it is particularly important to develop a low-cost and easy-to-use negative pressure drainage device

Method used

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  • Composite dressing and negative pressure drainage device prepared therefrom
  • Composite dressing and negative pressure drainage device prepared therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] S1. Mix the nano-silver solution with viscose fiber and elastic polyester staple fiber and put it into the cotton blender according to the mass ratio of 1:1, add 10mL of pullulan solution with a mass concentration of 1g / mL, and mix thoroughly for 30min , after mixing evenly, enter the double cylinder carding machine for carding, the carding speed is controlled at 20m / min, the cylinder interval is controlled at 25mm, and then the web is continuously laid to form a fiber web;

[0036] S2. Set low-melt polyester staple fibers on the fiber net, enter the upright cotton swing head, control the swing speed 40 times / min, fold the fiber net into an upright continuous stacking state to form multiple 3D upright cotton units next to each other , 3D upright cotton unit control 10cm;

[0037] S3. The 3D upright cotton unit obtained above was heated and formed in an oven, the heating time was 20 minutes, the baking temperature was 160°C, and the composite dressing was obtained by cut...

Embodiment 2

[0040] S1. Put the nano-silver solution in the viscose fiber and elastic polyester staple fiber and mix it into the cotton blender according to the mass ratio of 1:1.5, add 10mL of pullulan solution with a mass concentration of 1.5g / mL, and mix well 30min, after mixing evenly, enter the double cylinder carding machine for carding, the carding speed is controlled at 25m / min, the cylinder interval is controlled at 30mm, and then the web is continuously laid to form a fiber web;

[0041] S2. Set low-melt polyester staple fibers on the fiber net, enter the upright cotton swing head, control the swing speed 40 times / min, fold the fiber net into an upright continuous stacking state to form multiple 3D upright cotton units next to each other , 3D upright cotton unit control 10cm;

[0042] S3. The 3D upright cotton unit obtained above was heated and formed in an oven, the heating time was 25 minutes, the baking temperature was 170°C, and the composite dressing was obtained by cutting,...

Embodiment 3

[0045] S1. Mix the nano-silver solution with viscose fiber and elastic polyester staple fiber and put it into the cotton blender according to the mass ratio of 1:20, add 10mL of pullulan solution with a mass concentration of 2g / mL, and mix thoroughly for 30min , after mixing evenly, enter the double cylinder carding machine for carding, the carding speed is controlled at 25m / min, the cylinder interval is controlled at 30mm, and then the web is continuously laid to form a fiber web;

[0046] S2. Set low-melt polyester staple fibers on the fiber net, enter the upright cotton swing head, control the swing speed 40 times / min, fold the fiber net into an upright continuous stacking state to form multiple 3D upright cotton units next to each other , 3D upright cotton unit control 10cm;

[0047] S3. The 3D upright cotton unit obtained above was heated and formed in an oven, the heating time was 35 minutes, the baking temperature was 185°C, and the composite dressing was obtained by cu...

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Abstract

The invention relates to the field of medical equipment, and provides a composite dressing and a negative pressure drainage device prepared therefrom, including a composite dressing, a negative pressure suction cup, a nanometer mesh cloth, and a drainage outlet tube connected to a negative pressure absorber. One end of the drainage outlet tube is inserted into a negative pressure drainage device. The outlet of the suction cup is pressed, the surface of the composite dressing is pasted with a semi-permeable sealing film, the semi-permeable sealing film is in contact with the negative pressure suction cup, and the composite dressing is away from the semi-permeable sealing film and pasted with a nano-mesh. The drainage device of the present invention can be adapted to the needs of different wound positions, and is easy to operate and low in cost. The composite dressing has high biological safety, flexibility, high elasticity and good permeability, and has the effect of promoting wound healing.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a composite dressing and a negative pressure drainage device prepared therefrom. Background technique [0002] Closed negative pressure drainage technology uses foam dressings with drainage tubes to cover or fill wounds with skin and soft tissue defects, seals the dressing with a transparent sealing film to make the whole system a closed space, and finally passes through the outlet of the drainage tube with a hose Connected to a negative pressure absorber, it can promote wound healing by adjusting the negative pressure, and is now widely used in various chronic wounds including acute soft tissue defects and other diseases. [0003] Among them, the foam dressing needs to have good permeability to ensure that metabolites such as tissue exudate, pus, blood, and protein can be sucked out normally. At the same time, the contact between the foam dressing and the wound needs good biocompa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61L15/18A61L15/28A61L15/26A61L15/42A61L15/44A61L15/46A61M1/00
CPCA61M1/0023A61L15/18A61L15/28A61L15/26A61L15/42A61L15/44A61L15/46A61L2300/412A61L2400/12A61L2300/232A61L2300/104A61L2300/404C08L67/00C08L5/00
Inventor 周家发史廷龙
Owner ANSON NANO BIOTECH ZHUHAI
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