Limitations of Oral Mucosal Moisture Assessment as an Indicator of Intravascular Dehydration in Postoperative Cardiovascular Surgical Patients in the ICU: A Prospective Pilot Diagnostic Accuracy Study

In this single-center postoperative cardiac ICU cohort study, OMM showed limited discrimination for hypovolemia and no clear association with intravascular volume. OMM is not supported as a stand-alone screening tool; any interpretation should be coupled with dynamic hemodynamic assessments.