The extra pressure disrupts the flow of blood through the skin. Without a blood supply, the affected area of skin becomes starved of oxygen and nutrients. It begins to break down, leading to the formation of an ulcer.
These are the most common areas which are at risk of pressure ulcers they involve bony areas such as around the heels, hips, elbows and back. Other areas are buttocks thighs, back of head, ears, and shoulders
Factors which might put an individual at risk of pressure sores are Reduced mobility or Immobility, Acute illness, Sensory impairment, Level of consciousness, Poor nutrition, Poor vascularity, Anaemia, Extremes of age, Weight, Drugs, Infection, Severe, Chronic or Terminal illness, Dehydration and a previous history of Pressure ulcer damage.
Some of the interventions that can be taken to help minimise the risk of pressure ulcers occurring in those that are at risk, one method is to that the individuals is position is changed on a regular basis, another is to use a pressure relieving device such as a special mattress, bed frame, seat