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Hydrogel dressing is a medical dressing based on hydrogels, three-dimensional hydrophilic structure. [1] The insoluble hydrophilic structures absorb polar wound exudates and allow oxygen diffusion at the wound bed to accelerate healing. [ 2 ]
Hydrocolloid dressings are used to treat uninfected wounds. [6] Dressings may be used, under medical supervision, even where aerobic infection is present; the infection should be treated appropriately. [citation needed] The dressing is applied to a cleaned wound. Hydrocolloid patches are sometimes used on the face for acne.
The foam is able to mold according to the shape of the wound. [9] Hydrogel dressing: This dressing is made up of synthetic polymers such as methacrylate and polyvinyl pyrrolidine. It has high water content, thus provides moisture and cooling effect for the wound. The dressing is easy to remove from the wound without causing any damage.
Hydrogels can be used as drug delivery vehicles, for transdermal application, ophthalmic drug delivery, [11] cancer treatment [12] or for wound dressing. [7] [13] As a type of water based formulation, hydrogels are generally less greasy and are easier to be removed than oil-based formulations like organogels. [6]
Another is a humidity-sensitive polymer used in self-adaptive wound dressings that automatically regulate moisture balance in and around the wound. [5] [6] The nonlinear response of smart polymers is what makes them so unique and effective. A significant change in structure and properties can be induced by a very small stimulus.
This technique has seen considerable use in cell and tissue engineering applications due to the ability to inject or mold a precursor solution loaded with cells into a wound site, then solidify it in situ. [25] [24] Physically crosslinked hydrogels can be prepared by different methods depending on the nature of the crosslink involved.