TransFix® by Cytomark
Immunophenotyping by flow cytometry is an established diagnostic tool to assess the type and number of lymphocytes in human blood. Situations often arise where samples cannot be analysed immediately after being taken and must be preserved for future analysis.
TransFix® preserves leucocyte stability and the antigenic sites, until flow cytometry can be performed. This enables blood samples to be batched for subsequent analysis or to be transported between distal sites.
TransFix® can be used to extend the viability of anticoagulated blood samples for up to 10 days when stored at 4ºC. Research has also demonstrated (Bergeron et al) that blood samples treated with TransFix® are also stable when stored between 20ºC to 24ºC for up to 7 days and at 37ºC for up to 3 days.
TransFix® can be used in resource poor areas of the world to extend sample viability without refrigeration and enable samples to be batched and transported for examination. (Jani et al, 2001).
TransFix® was developed by medical scientists from UK NEQAS, which is part of Sheffield Teaching Hospitals NHS Foundation Trust. TransFix® was developed out of the requirement to produce stabilised blood samples that could be used in External Quality Assurance programs for flow cytometry. | 
