Spontaneous fluid transport dressing based on continuous asymmetric super-hydrophilic channel and preparation method of spontaneous fluid transport dressing

A hydrophilic channel, super-hydrophilic technology, applied in dressings, adhesive dressings, non-adhesive dressings, etc., can solve the problems of secondary infection of the wounded, slow wound healing, inability to discharge, and inability to achieve continuous discharge of extravasated liquid.

Active Publication Date: 2022-06-03
GENERAL HOSPITAL OF TIANJIN MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of dressings to hemostatic treatment is a common method for this type of wound treatment. However, in the existing studies, most of the dressings used are simply blocked, which cannot actively discharge the extravasated fluid from the ulceration, resulting in secondary infection and wound wounds. slowed healing
On the other hand, the continuous discharge of extravasated fluid cannot be achieved with simple liquid-absorbent dressings
When changing the absorbent dressing, it will also cause secondary damage to the wounded wound

Method used

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  • Spontaneous fluid transport dressing based on continuous asymmetric super-hydrophilic channel and preparation method of spontaneous fluid transport dressing
  • Spontaneous fluid transport dressing based on continuous asymmetric super-hydrophilic channel and preparation method of spontaneous fluid transport dressing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

This example is used to illustrate the effect of the composition ratio of the hydrophilic coating on its hydrophilic performance, and a blank control group is set at the same time.

[0039] The raw material components of the hydrophilic coating were mixed to prepare a coating solution. The component ratios of the examples and comparative examples are shown in Table 1. The polyester sheet was soaked in the coating solution for 10 min and then taken out and dried to obtain a surface coated with a hydrophilic coating. Water-coated polyester sheet, the contact angle of the polyester sheet coated with a hydrophilic coating on the surface is measured, and the measurement method is as follows:

The measuring device is a contact angle measuring instrument SDC-200 produced by SFMIT. Deionized water was used in the contact angle determination.

[0040] The specific operation method is as follows: set the volume of water droplets discharged from a micro syringe (manufactured by SFMIT, wi...

Embodiment 2

[0045] (2) Preparation of spontaneous fluid transport dressings based on continuous asymmetric channels

Embodiment 3

[0047] (2) Preparation of spontaneous fluid transport dressings based on continuous asymmetric superhydrophilic channels

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Abstract

The invention provides a spontaneous fluid transport dressing based on continuous asymmetric super-hydrophilic channels and a preparation method thereof, the dressing comprises: a porous water absorption layer for absorbing and discharging liquid; the base layer is provided with a through liquid conveying channel used for conveying liquid to the porous water absorption layer, the liquid conveying channel comprises a through hole and a hydrophilic channel which are communicated with each other, openings, close to the porous water absorption layer, of the two ends of the hydrophilic channel are closed, openings, close to a wound, of the two ends of the hydrophilic channel are opened, and the width of the openings is larger than that of the closed openings. The dressing is directly attached to the upper portion of an ulceration wound, and the base layer of the liquid conveying channel with the communicating structure is tightly combined with the wound. Under the driving of capillary force, wound exudate is spontaneously enriched in the hydrophilic channel and is outwards transported into the porous water absorption layer through the through hole structure, so that in-situ separation and active discharge of the wound exudate are realized.

Description

technical field [0001] The invention belongs to the field of medical devices and materials, in particular to a spontaneous fluid transport dressing based on a continuous asymmetric superhydrophilic channel and a preparation method thereof. Background technique [0002] Using the special interaction between the interface and the fluid to control the collection behavior of the fluid is a key issue in today's materials science research. In disaster medicine, emergency treatment and protection of ruptured wounds is an important means to improve the survival rate of the wounded. The use of dressings for hemostasis is a common method for treating such wounds. However, in existing studies, the dressings used are mostly simple plugging, which cannot actively drain the extravasated fluid from the ruptured site, resulting in secondary infection of the wounded and wounds. Healing slows down. On the other hand, the continuous discharge of extravasated liquid cannot be achieved by usin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F13/02A61F13/00
CPCA61F13/0206A61F13/0216A61F13/022A61F13/0266A61F13/0286A61F13/00017A61F13/00029A61F13/00068
Inventor 靳衡曹墨源江枫刘起辉孙可可张艳么颖柴艳芬
Owner GENERAL HOSPITAL OF TIANJIN MEDICAL UNIV
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