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Alginate is initially extracted from the cell wall of brown seaweeds. Alginate dressings can be in the form of freeze-dried, porous (foam) sheets or flexible fibres. Flexible fibres are used to treat cavity wounds. The alginate will form a gel in contact with the exudates of the wound and give it a strong absorbent power. [2]
In modern typical usage, the solution is applied to the wound once daily for lightly to moderately exudative wounds, and twice daily for heavily exudative wounds or highly contaminated wounds. [3] The healthy skin surrounding the wound should preferably be protected with a moisture barrier ointment (e.g., petroleum jelly) or skin sealant as ...
It protects the wound from bacterial contamination, absorbs wound discharge, and digests necrotic tissues. It is mostly use as secondary dressing. However, it is not used in wound with high discharge and neuropathic ulcers. [9] Alginate dressing: This type of dressing is made up of either sodium or calcium salt of alginic acid. This dressing ...
The most common, conventional extraction process involves six steps: pre-treatment of the algal biomass, acid treatment, alkaline extraction, precipitation, bleaching, and drying. [4] Pre-treatments mainly aim at either breaking the cell wall to help extract the alginate, or removing other compounds and contaminants from the algae. [4]
The 3D polymeric network of hydrogels is highly hydrated with 90-99% water w/w; it is capable of binding many times more water molecules when assembled than in the uncross-linked state. [2] [3] Hydrogel dressings can absorb up to 600 times their initial amount of water, including fluid-based wound exudates.
Liquid bandages are suitable for clean cuts that close easily and shallow small wounds, as it will help both sides of the wound to bond and produce a suture-like effect. Due to the drying of liquid wound dressing, it will form a nonelastic film on the wound and cannot absorb tissue fluid. If the wound area is too large, it will actually hinder ...
Wound cleansing forms an integral part of wound management and generally suggests the application of a fluid to aid the removal of surface contaminants, bacteria, and debris from the wound surface and surrounding skin. [25] Water as a cleansing agent, especially in chronic wounds has been proposed [23] and is widely used [26] especially in the ...
A hydrocolloid dressing is an opaque or transparent [1] dressing for wounds. A hydrocolloid dressing is biodegradable, [2] breathable, and depending on the dressing selected, may adhere to the skin, so no separate taping is needed. [3]