Figure 1. FIFO, LIFO and RISO modes. Different options and priorities. There are two urgent samples, one detected at reception5 and another that goes unnoticed as routine3.
The terms FIFO, LIFO and FEFO are commonly used in management (Table 1).
Can be applied to samples and response times, when considering "expiration" as "commitment of response". Every laboratory follows different procedures. However, FIFO-routine and LIFO-urgency approach are frequent. Specific manual entries for emergencies in the analyzers are applied. There is a coexistence of two laboratories: routine and urgency.