A double blind, non randomized, multicenter investigation

The study consists of 2 evaluations/visits.

Evaluation/visit 1: Takes place in connection with admission to the hospital. Informed consent, inclusion and exclusion criteria are assessed as well as assessment of skin type and inspection of the entire body skin. Pregnancy test on women of childbearing potential, height, weight, blood pressure and body temperature are measured. Questions about demography, health conditions, previous illnesses, nicotine habits. Risk assessment for pressure ulcers (Modified Norton or RAPS-scale) is carried out according to the hospital usual routine. Examination with PU sensor will be performed.

Evaluation/visit 2: Takes place in connection with the discharge from the hospital or 4 weeks after visit 1 if the research subject is still hospitalized. Full body skin inspection to see possible onset of pressure ulcers. Review of the research subject's medical records as well as review of nursing notes from the hospital where the research subject has been discharged from, to find any notes about pressure ulcers. The study participation is then terminated for the research subject.

Inclusion Criteria:

1. Given their written consent to participate in the study
2. Male or female between ≥18 years and ≤ 64 years with a reduced mobility, where the hospitalization may involve a risk that the person may become less active or Male or female ≥65 years

Exclusion Criteria:

1. Existing pressure ulcer or damage to the skin around the sacrum where the PU sensor plate and pillow are to be placed
2. Fever ≥38 ºC, within 30 minutes before the examination with PU sensor
3. Difficulty lying still in supine position during the examination with PU sensor, which takes 5 to 10 minutes
4. Known allergy or sensitivity to any of the materials in PU sensor that gets in contact with the skin on the sacrum
5. Body weight ≥200 kg
6. Previous participation in the study
7. Mental inability, or language difficulties that results in difficulty to understand the meaning of participation in the study and / or signing the study consent,
8. Pregnancy

Due to uncertainties in EU data protection legislation individual deidentified participant data are not shared. The main uncertainty is the concept of what "deidentified" means. It appears not to mean that the data set of a person is simply separated from the person's name. What additional operations have to be done appears to depend on technological capabilities to re-identify the persons associated with the data set. A common perception is that the technological capabilities for re-identification are permanently increasing. This could have the effect that public data sets that are regarded as deidentified now might become re-identifiable data sets in the future. Once this happens, the sponsor is no longer able to make the publication of the data sets un-happen. This could result in punishment by EU data protection authorities. The sponsor wants to avoid this.

The medical device will give an ID number but the results from the measurement will be masked until data base is locked (DBL). The data from the measurement will be available after DBL