why the epidermis is affected by a decubitus ulcer?A decubitus ulcer is also known as a pressure ulcer, pressure sore, or bedsore. It's an open wound on your skin caused by a long period of constant pressure to a specific area of the body. Decreased blood flow to these areas leads to tissue damage and death. Decubitus ulcers often occur on the skin covering bony areas.

Name another group of people, besides hospital or nursing home patients, that is especially sUSceptible to developing pressure ulcers?

IF you mean who is at risk of getting a pressure ulcer?, I can answer from my experience as a R.N., as well as a person who has helped some friends, by taking care of some of their loved ones, outside the Hospital and Nursing Home setting.