T-Cell Xtend®

T-Cell Xtend®  Package Insert The T-Cell Xtend reagent is an antibody complex that is added to blood samples in the laboratory immediately before running the T-SPOT®.TB test. The product was licensed throughout Europe in 2008 and gained FDA premarket approval in August 2010. The T-Cell Xtend reagent allows blood samples to be processed up to 32 hours after venepuncture without affecting the accuracy of the test. With the T-Cell Xtend reagent, the T-SPOT.TB test offers IGRA users unrivalled flexibility: Blood can be kept at room temperature for 32 hours prior to start of assay The longest “time to lab” at room temperature of any currently available IGRA Blood samples can be easily shipped overnight Blood is collected in standard lithium heparin or sodium heparin tubes Does not require dedicated collection tubes or shaking of tubes