2.1. General information
ulcer
PRESSURE ULCER, PRESSURE ULCER, ULCER, PRESSURE ULCERS
The participants in this study were selected from pressure ulcer patients who were admitted to the department of burn and plastic surgery in our hospital, from April 2021 to April 2022. This study was approved by the Institutional Review Board of Shenzhen Longhua District Central Hospital, Guangdong Medical University. The inclusion criteria were: Patients with Phase II to IV ulcer according to the National Pressure Ulcer Advisory Panel classification system; Pressure ulcers on the sacrum, ischial tubercle, hip, and heel; Absence of relative contraindications for using LPPL and silver sulfadiazine cream; The patient was informed of the study. The exclusion criteria were: The presence of serious skin tissue lesions; Unstable blood glucose levels; If hormone drugs and immunosuppressants were used within 1 month; Those physically poor and cannot turn over independently. A total of 88 patients were randomly divided into a combined cream group (n = 44) and LPPL group (n = 44). The general data of the 2 groups are displayed in Table Comparison of two groups of general information.LPPL = linear polarized polychromatic light.