Viva Products, Inc.  

Vivaspin® centrifugal devices allow rapid concentration of urine samples before electrophoresis.  They are available in sample volumes up to 20 mL allowing higher concentration factors which is helpful for low total protein samples.  With a total of 6 different sample volumes ranging as low as 0.5 mL, Vivaspins offer the widest choice of volumes of any centrifugal concentrator.  All of them are designed with integrated dead stops to prevent the risk of over concentration.  The Vivaspin 20 devices are recommended by Sebia and Helena to prepare urine samples for their capillary electrophoresis systems.  They have also been used to concentrate spinal fluid (CSF) as well as bacterial antigens (Legionella, Pneumonia, Streptococcus B) in urine prior to immunoassay.  The Vivaspin products are registered with the US FDA as Class 1 medical devices and are manufactured in compliance with GMP quality requirements.  For more information visit us at www.vivaproducts.com.

Vivafree^TM centrifugal filters allow rapid sample preparation for free drug and hormone tests by removing analytes that are plasma bound.  They are used for therapeutic drug monitoring of phenytoin, valproate, immunosuppressants and antibiotics as well as free hormones such as testosterone and insulin.  Labs report cost reductions of 35% by replacing other ultrafilters with Vivafree filters.  Separations are achieved in 15-20 minutes with high recovery of the free drug or hormone.  Final analysis has been performed by immunoassay as well as by liquid chromatography/mass spectrometry.  The Vivafree products are registered with the US FDA as Class 1 medical devices and are manufactured in compliance with GMP quality requirements.  For more information visit us at www.vivaproducts.com.