VITROS Chemistry Products DGXN Slides --- [REF] 834 3386. Product is packaged in a box with multiple slides. The lot and expiration codes are found on the side of the package. || Product Usage: Intended use: For in vitro diagnostic use only. VITROS Chemistry Products DGXN Slides quantitatively measure digoxin (DGXN) concentration in serum and plasma using VITROS 250/350/950/5,1 FS and 4600 Chemistry Systems and the VITROS 5600 Integrated System.