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Can Near-Infrared Spectroscopy (NIRS) or Intramuscular Glucose Levels Detect Impaired Leg Compartment' Perfusion?

Near infrared spectroscopy (NIRS), a technique that relies on differential absorption of infrared light to provide relative estimation of tissue oxygenation, has been successfully used to monitor perfusion of various tissues, including muscle tissue of the lower extremity, however available research reports mixed success and this technology is not currently a standard of care for patients with leg fractures. The investigators propose use of NIRS technology in patients with diagnosis of tibial fracture and acute compartment syndrome to detect / document impaired perfusion of the anterior compartment of the leg, as compared to their non-broken leg. The investigators also propose measurement of intramuscular glucose level in the affected leg and compare it to a fingerstick glucose to detect relative hypoglycemia in the affected muscular compartment. If proven effective, NIRS, or IM glucose, or both techniques could be used for clinical monitoring of patients with tibial fractures at risk for acute compartment syndrome.