A Test of the Investigational SEM Scanner

Inclusion Criteria: * Subjects are 18 years of age or older. * Subject or health care proxy is willing and able to provide informed consent for enrollment. * Subject is agreeable to having skin assessments, blanchability tests, and SEM Scanner readings performed daily at all anatomical sites for a duration of five (5) days, with photography as needed. * Subject is admitted to an intensive Care Unit (ICU) and has an anticipated ICU course of 48 hours or greater. * Subject is not Comfort Measures Only (CMO). * Subject is anticipated to be bedridden for ore than 6 hours per day. * All four (4) of the subject's anatomical sites in question (sternum, sacrum, left heel and right heel) are accessible for scanning (e.g., no cast or medical device present such that heels are not accessible). Exclusion Criteria: * Subject has broken skin or scar tissue at the sternum, sacrum, left heel or right heel. * Subjects for whom the physical act of performing the inspections and measurements required in this study are contra-indicated, as determined by the principal investigator or attending physician. * Subjects or legal representatives who are unable to understand the aims and objectives of the trial. * Presence of any condition(s) which seriously compromise(s) the subject's ability to complete this study, or has a known history of poor adherence with medical treatment. * Subject is pregnant. * Subject is incarcerated.