Clinical Assessment of Low Calcium In traUMa (CALCIUM)

Blood draw happens as part of routine clinical care for all trauma activations. As part of the study, we will use existing blood that is drawn as part of routine clinical care, or when necessary, draw additional blood to obtain samples at 0, 3, 6, 12, 18, and 24 hours assessing ionized calcium, serum calcium, and magnesium. We will strive to have draws occur within +/- 1 hour of the goal times. However, given that the blood draws will be performed by way of the clinical team and the unpredictable nature of trauma care, missed draws or draws out of the goal time frame will not be considered protocol violations