Amorphous hydrogel dressings are made of water, polymers and other ingredients, and have no set shape, i.e. they are free-flowing. The product can slowly seep into all of the crannies in the wound, especially puncture or other deeper wounds. Amorphous hydrogel normally needs to be covered with a secondary dressing to keep it in place.
Impregnated hydrogel dressings are made by adding an amorphous gel to a gauze pad, rope or gauze strips. These not only provide a high amount of moisture, but may be used for necrotic wounds and deep wounds with tunneling or sinus tracts. Sheet hydrogels are designed with the hydrogel suspended inside a thin mesh, allowing the dressing to overlap onto healthy skin without harming it.
Below are the 2016 sales of hydrogels used in wound management, with their projected growth through 2024.