Reliability of Sensor Spacing for NIRS in Traumatic Tibia Fractures

Inclusion Criteria: * Unilateral leg injury * Enrolled within 48 hours of injury * Subjects with 'severe' leg injuries presenting at trauma center that meet at least one of the following from each group below: Anatomic location: * Tibia/Fibula shaft fracture * Tibial plateau fracture (Schatzker III-VI) High Energy Mechanism of Injury: * Fall from \>8 foot height * Motor vehicle collision (\> 15 mph) * Motor vehicle versus pedestrian accident * High velocity gunshot wound * Crush injury * Sport/recreation Exclusion Criteria: * Application of NIRS monitoring would be an impediment to care * Known prior leg fractures, patient has already undergone fasciotomy of the injured leg prior to enrollment * History of peripheral vascular disease or concurrent lower extremity vascular injury/surgery * Admission for atraumatic medical reasons * Subject is unable to provide informed consent, or consent cannot be obtained from a legally authorized representative * Complete spinal cord injuries, bilateral upper extremity injuries, or amputation/mangled lower extremity * Patients who are in police custody at presentation to the hospital or who are pregnant * Patient has an open injury on the injured leg that is large enough that at least one NIRS sensor cannot be safely placed over the compartment * Bilateral leg injuries * Not able to be enrolled within 48 hours after injury