The respiratory therapist enters modes and parameters into the ventilator with which of the fol-lowing?
a. Control logic
b. Input power
c. User interface
d. Drive mechanism
ANS: C
The user interface or control panel contains certain knobs, dials, or keypads where the ventilator operator sets or enters certain information to establish how the pressure and pattern of gas flow are delivered by the machine. Inside the ventilator is the control logic or control system that in-terprets the operator settings and produces and regulates the desired output. The input power is the ventilator's power source that provides the energy to enable the ventilator to perform the work of ventilating the patient. The drive mechanism is a mechanical device that produces gas flow to the patient.
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