Benchmarks

Diagram illustrating a ventilator system (Fig. 3). The system includes a Ventilator (59) connected to a patient (51) via a connector (55) and flow path (57). The flow path contains a valve (63) and a Flow Sensor (65). An $O\_2$ Sensor (61) monitors the gas. A Control Unit (53) receives input signals from the Flow Sensor (65) via line (69) and the $O\_2$ Sensor (61) via line (67).

Diagram illustrating an alternative ventilator system (Fig. 4). The system includes a Ventilator (59) connected to a patient (51) via a connector (55) and flow path (57), which contains a valve (63) and a Flow Sensor (65). A unit (53), labeled Sampling Pump, interacts with the flow path and the Flow Sensor (65). Gas is sampled from the flow path (indicated near 61) and routed to a Sampling Pump (71). The sampled gas is then measured by an $O\_2$ Sensor (73). The output of the $O\_2$ Sensor (73) is connected to a Microcontroller (75), which also interacts with the unit (53).