Dimension Vista(R) Systems Vista(R) Theophylline THEO Flex(R) Regent Cartridge (K4071) The THEO method is an in vitro diagnostic test for the quantitative measurement of Theophylline in human serum and plasma on the Dimension Vista(R) system.

Reason: Firm has received complaints from customers of "Abnormal Reaction" errors occurring on calibrations, QC and patient samples. The Abnormal Reaction flag is being triggered by an internal check in the method for atypical particle reagent aggregation.

Code information: Lots 12135AE and 12171BB

Distribution pattern: USA (nationwide) including the states of AL, AZ, CA, CO, DC, DE, FL, GA, IL, IN, KY, LA, MA, MD, MI, MO, MS, MT, NC, NH, NJ, NY, OH, OR, PA, SC, TN, TX, VA, VT, WA and WI.