Intrinsic Risk Factors include an assessment of the following

General health status – does the patient present with multiple health issues – conditions such as diabetes mellitus or respiratory conditions which are reported to predispose a patient to an increased risk
Mobility status – reduced mobility affects the ability to relieve pressure on vulnerable tissues
Nutritional status – poor nutrition can have multiple effects – nutritional status can be assessed though simple weight monitoring and the assessment of specific indicators such as haemoglobin or serum albumin
Skin moisture – this is a multi facetted section – awareness of incontinence is critical however one should also consider increased body temperature and its effects
Age – effects of age have been shown to be associated with increased risk, however be aware that pressure ulcers can occur at any age if a mix of risk factors are present
History of previous pressure ulcers – healed ulcer sites represent a high risk site as scar tissue will be up to 80% original tensile strength
Drug history – such as use of steroids which can affect skin integrity
Perfusion / oxygenation related issues – CVS instability, inotrope support, oxygen requirement, are reported to increase the risk of pressure ulcers