Prevention of Pressure Ulcers in Patients at High Risk of Developping Pressure Ulcers Using the Low-pressure Motorized Air Support Mattress With XTECH®25 Control Unit

Inclusion Criteria: * Patient over 18 years old * Patient with high risk of developing pressure ulcers (clinical judgment and a score \<= 12 on the Braden scale (6 (maximum risk) to 23 (no risk)) * Patient without pressure injury on the day of inclusion * Patient up lying more than 20 hours a day on XTECH®25 mattress * Patient with a weight \< 200 kg * Patient (or a trusted third party) having been informed of the study and agreeing to participate Exclusion Criteria: * Patient at end of life (estimated life expectancy less than 6 months) * Patient discharge from the establishment expected within two months * Participants will be excluded from the study if they meet the following combination of criteria indicative of malnutrition according to the 2021 Haute Autorité de la Santé guidelines (Participants must meet at least one phenotypic criterion and one etiological criterion to be considered malnourished and therefore ineligible for inclusion in the study) : A) One or more of the following phenotypic criteria: 1. Significant unintentional weight loss: A weight loss of ≥ 5% within 1 month or ≥ 10% within 6 months 2. Low Body Mass Index (BMI): BMI \< 18.5 kg/m² for individuals under 70 years old, BMI \< 21 kg/m² for individuals aged 70 years and older 3. Reduced Muscle Mass 4. Evident reduction in muscle mass AND B) One of the following etiological criteria: 1. Inadequate nutritional intake: 2. Nutritional intake less than 50% of the energy requirements for more than one week 3. Reduced food intake for more than two weeks 4. Presence of Disease or Stress Metabolism 5. Acute or chronic illness, or any condition causing metabolic stress that increases energy requirements .