Introduction: Deep tissue injury (DTI) was described as early as in 1873 when Sir James Paget defined purple areas of unbroken skin that sloughed and turned to be cavities. In 1942 Groth, a German …show more content…
Indeed, the term deep tissue injury was chosen because the most likely cause of these pressure ulcers was a great level of pressure at the bone-soft tissue crossing point. DTI at first was defined as "A pressure related injury to subcutaneous tissues under intact skin. Initially, these lesions have the appearance of a deep bruise and they may herald the development of subsequent development of a Stage III-IV pressure ulcer even with optimal treatment" (NPUAP, 1997). According to NPUAP, DTI is also an injury to the subcutaneous tissue under the skin due to pressure [2]. Moreover, DTI results from excessive pressure applied to soft tissue over bony prominence. This type of ulcers is sever and hard to discover. Indeed, if such type of ulceration reaches advanced level, it becomes hard to treat and the prognosis is unprivileged. Thus, focusing on skin cannot reflect the extent of the total damage induced by the pressure [4]. DTI is commonly seen in bedridden patients in nursing homes and hospitals. Although many attempts were made to explain the exact mechanism and