[Delayed evaluation of test strips for blood glucose determination in small reflectometers]

The precision and accuracy of reacted reagent strips (Haemoglucotest 20-800 R, Reflocheck) stored in an envelope and analysed 24 and 48 hours later, by means of glucose reflectance meters (Reflolux II, Reflocheck) was studied. A good correlation of the values estimated after 24 and 48 hours to the value analysed immediately after sampling was found for both systems (Reflolux II 24 hours later, r = 0.9713, y = 24.16 + 0.7369. x, and 48 hours later, r = 0.9388, y = 44.21 + 0.5234. x; Reflocheck 24 hours later, r = 0.977, y = 9.72 + 0.9525. x, and 48 hours later, r = 0.9433, y = 45.97 + 0.4802. x). Our data show, that the initial value can be calculated using the 24 and 48 hour values by means of linear regression. Therefore the analysis of reacted reagent strips for blood glucose determination is beneficial in the management of Typ-I-Diabetics.