A multi-center evaluation of TECHNOSCREEN ADAMTS-13 activity assay as a screening tool for detecting deficiency of ADAMTS-13.

Background: Quantifying A disintegrin-like and metalloprotease with thrombospondin type 1 motif, member 13 (ADAMTS-13) activity enhances thrombotic thrombocytopenic purpura (TTP) diagnosis but most assays are time consuming, technically demanding, and mainly available in reference centers.

Objective: Evaluate a simple, semiquantitative ADAMTS-13 activity screening test for early identification/exclusion of TTP.

Patients/methods: Plasma from 220 patients with suspected thrombotic microangiopathy at three reference centers were tested with TECHNOSCREEN ADAMTS13 activity screening test in comparison with TECHNOZYM ADAMTS-13 activity ELISA at two centers, and in-house fluorescence resonance energy transfer assay at the third center.