In the first trial, bags were sent to the Operating Theatre. In accordance with standard procedures, two bags are attached to the infusion holder, one actively coupled to the IV line, the other as a backup. In cases where the backup bag was not required it was returned to the Blood bank. The Timestrip indicator was examined and it revealed that the bag had, in fact, experienced at least 6 hours above the maximum threshold temperature and therefore had to be destroyed.
In the absence of the Timestrip indicator this bag may have been returned to storage, regardless of its condition. In another trial, blood bags were returned unused to the Blood bank by the hospital’s Emergency Department. The Timestrip indicator was used to confirm that the bag had not experienced a breach of temperature threshold protocoland could therefore be stored for re-use at a later stage.