ABP Operating Guidelines  – Version 9.0 – July 2023  Page 79/91 8.2.6  For blood ABP Samples  of suspicious profiles where the Blood Stability Score (BSS) could not be calculated, the APMU  shall assess the collection- to-analysis time (CAT), any available temperature logger data, and the potential degradation of blood Markers , including scattergrams, in order to evaluate Sample  validity, liaising with (an) Expert (s) as required.