The concept of validation is more important than the concept of normal range. A non-validated result will be sent a second time to REX after validation by a biologist. As soon as a request is registered in a laboratory, this information appears in REX and every requested and registered lab test will be marked. Chronologic mode displays lab tests in function of the sample time. The first screen of the chronologic mode corresponds to the latest known sample.
Historic mode displays the last eight known samples of numerical lab tests.
This print is done on a batch mode around 4 pm on seven laser printers located in each building of the v hospital. Only validated lab tests are printed. The operational implementation of REX has been realized in the second semester of 1989 in six pilot care units and extended to all care units of the Rouen University hospital at the beginning of 1990. This hospital comprises three centers separated by 5 kilometers, with 39 care units and 2500 beds. Each day, an average of 2200 patients files are processed with an average of 8 lab tests by patient.