5Am Strong D,Bortz P.An intergrative review of pressure relief in surgical patients[J].AORN J,2001,73(3):645-674
6Schoonhoven I,Haalboom JR,Bousema MT,et al.Prospective cohort study of routime use of risk assement scales for prediction of pressue ulcers[J].BMJ,2002,325(7368):797-802