[Retracted] Prevention Effects of Chain Management on Pressure Ulcers of Hospitalized Patients

Table 5

Staging of perioperative PI.

	Staging	Standard
Stages of pressure injury	I	Skin is intact, erythema that does not whiten by finger
	II	Partial loss of cortex with exposed dermis
	III	Full-thickness skin is missing, and subcutaneous fat tissue, wound edge involute, and granulation tissue can be seen
	IV	Absence of full-thickness skin and tissue, fascia, bones, muscles, ligaments can be seen, and involutions, sinuses, and sneaking are often seen