Vivafree™ Centrifugal Filters
Vivafree centrifugal filters offer fast, accurate separations of free drugs for Therapeutic Drug Monitoring. They have been used successfully for phenytoin1, valproic acid, antibiotics, immunosuppressants and other drugs. Vivafree filters are also being used clinically to separate free hormones such as testosterone and insulin. Separations can be performed as quickly as 20 minutes with high recoveries and excellent reproducibility. Savings of 35% have been reported when switching to Vivafree filters from another centrifugal ultrafiltration device2.
These devices are used for a variety of applications by clinical diagnostic labs. Vivaproducts also provides pipettes and centrifuges for use with these filters.
(1) Comparison of Centrifugal Filter Performance for Free Phenytoin Assays (PDF)
(2) Evaluation of a Centrifugal Filtration Device in the Measurement of Free Testosterone (PDF)
Vivafree™ 2
Up to 2 ml starting sample volume
For separation of free drugs and hormones from those bound to serum proteins.
Vivafree™ 500
Up to 500 µl starting sample volume
For separation of free drugs and hormones from those bound to serum proteins.
Drug & Hormone Separations
Free Drug & Hormone Separations with Vivafree™ Filters
Vivafree™ filters can be used to prepare samples for therapeutic drug monitoring of phenytoin, valproic acid and digoxin. They can also separate free testosterone, insulin and cortisol in clinical samples.
Request Free Samples
Vivaproducts is offering Vivafree™ Free Samples
Click below to complete a short form to request free samples for validation testing.