Monitor (11) includes a microcontroller (51) programmed in a first mode of operation to drive various loads (59), (69) which operate to perform tests on patient samples. The results of the tests are sensed by sensors (61), (75) and digitally stored in storage (67) for display on display (21). The microcontroller...http://www.google.com.au/patents/US5652755?utm_source=gb-gplus-sharePatent US5652755 - Printer interface system