Investigation conclusion: the customer's complaint was not replicated during in-house testing of retain device lot t11436n.Retains of the complaint lot were tested with a positive calibrator, no issues with d-dimer recovery were observed.Lot performed within specification.Manufacturing batch records for lot t11436n were reviewed and found that the lot met final release specifications.Based on the information available, there is no indication of a product deficiency and no corrective action is required.
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Customer reported poor d-dimer correlation between triage and star evolution.Correlation study was performed and initiated at the beginning of the pandemic in march.Customer provided their normal ranges for triage and star evolution: triage = 0-400ng/ml ddu, star evolution = 0-0.5 ug/ml feu.The following comparisons were conflicting given sites normal range from (b)(6) 2020 - (b)(6) 2020: triage 148ng/ml and 143ng/ml, star 0.51ug/ml, triage 253ng/ml and 351ng/ml, star 0.52ug/ml, triage <100ng/ml and <100ng/ml, star 0.67ug/ml, triage 263ng/ml and 253ng/ml, star 0.54ug/ml, triage 480ng/ml and 483ng/ml, star 0.48ug/ml, triage 181ng/ml, star 0.51ug/ml, triage 391ng/ml, star 0.58ug/ml, triage <100ng/ml, star 0.55ug/ml, triage 227ng/ml, star 0.53ug/ml, triage 355ng/ml, star 0.55ug/ml, triage 118ng/ml, star 0.54ug/ml, triage 170ng/ml, star 0.55ug/ml, triage 291ng/ml, star 0.59ug/ml, triage 278ng/ml, star 0.51ug/ml.Customer stated samples were only used for correlation purposes.
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