HEM.37923 D-Dimer Calculated Values If calculations (including conversion of units) are used to obtain d-dimer results, the lab documents checks or at least annually to ensure that the calculations are correct. Note: The d-dimer may be a calculated value. In some institutions, the D-dimer result may be calculated by the coagulation analyzer, while in others it may be calculated by the LIS. The accuracy of calculations should be verified at least annually. We use mini-Vidas for d-dimer. Are there other Vidas user that have a response to this question?.