Reliability of Sensor Spacing for NIRS in Traumatic Tibia Fractures
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This is a study intended to evaluate a non-invasive device that uses light to measure the amount of oxygen in the muscles of injured and non-injured legs in specific situations. The name of this technology is NIRS (near-infrared spectroscopy). The goal of this study is to collect the information necessary to understand the use of the NIRS monitoring system to diagnose and direct treatment decisions in case of complications sometimes experienced in traumatic tibia fracture, such as excessive swelling called acute compartment syndrome (ACS).
Condition or disease
Orthopedic DisordersTibial Fractures
This study seeks to further develop the use of NIRS technology in the diagnosis of acute compartment syndrome. NIRS values normally increase in traumatized legs compared to the contralateral uninjured leg or forearm, indicative of a hyperemic response. The investigators hopes to build upon the current knowledge and verify the ability to accurately detect ACS using two easily identified and accessible leg compartments, the anterior and superficial posterior utilizing the Nonin 7600 oximeter with the Sensor Model 8004CV. Additionally, since this device was originally designed with brain tissue in mind, the NIRS device will collect vital engineering data that will be used to validate the algorithm used to produce the oxygenation values in injured muscle tissue.
NIRS measurements as compared to clinical findings [ Time Frame: Participants will be followed for the duration of hospital stay, an expected average of 72 hours ]
Assess the accuracy of the Nonin 7600 oximeter with the Sensor Model 8004CV in the diagnosis of Acute Compartment Syndrome, using the "gold standard" criterion for ACS, which will be "clinical diagnosis". That is, all subjects undergoing fasciotomy for clinically diagnosed ACS will be considered to have ACS. NIRS values will be compared to clinical diagnosis to determine accuracy and threshold values.
Secondary Outcome Measures :
Accuracy of NIRS measurements compared to Intracompartmental pressure (ICP) measurements [ Time Frame: Participants will be followed for the duration of hospital stay, an expected average of 72 hours ]
ICP measurements will be compared to NIRS values to assess the magnitude of accuracy between the 2 tools.
Correlation between NIRS measurements between injured and uninjured extremity [ Time Frame: Participants will be followed for the duration of hospital stay, an expected average of 72 hours ]
Compare NIRS values between non-injured and injured extremities
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Layout table for eligibility information
Ages Eligible for Study:
18 Years to 65 Years (Adult, Older Adult)
Sexes Eligible for Study:
Accepts Healthy Volunteers:
Subjects will be recruited from the trauma bay, surgical wards and ICU of Grady Memorial Hospital.
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:
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
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