We have received a recall notice that one lot number of citrate (blue top) collection tubes supplied by BD Diagnostics has been giving falsely elevated aPTT results. According to the manufacturer, results may be more than 24 seconds prolonged above expected.
Tubes from the affected lot number are being removed from inventories throughout the hospital. In the meantime, if aPTT results do not appear consistent with previous results or with treatment, please have them repeated as soon as possible.
Please feel free to contact Dr. Deborah Griswold Medical Leader, Hematopathology (604-806-9905) if you need additional information.