The ventilator is a microprocessor-controlled, positive pressure ventilatory assist system; the system’s integral air intake filter draws in ambient air which is then pressurized by the system’s centrifugal blower assembly. The In-Line Flow Restrictor (ILFR) valve and Pressure Regulation Valve (PRV), Which are both located in the blower discharge airway, regulate total flow and pressure at the blower discharge system. An Oxygen module can be installed to add a controlled source of supplemental oxygen, up to 100% to the patient.
The Pressure Control (PC) board continuously monitors the readings from the Airflow Module (AFM) of total gas flow, temperature, generated pressure, and patient circuit pressure to ensure prescribed therapy to the patient. The PC bard transmits process data to the Main Control (MC) board which then provides overall control of the ventilator including conveying instructions to the PC board regarding required valve stem position and blower speed.
A liquids crystal display (LCD) screen is mounted on the front enclosure of the ventilator. The LCD and the Display Control (DC) boards provide the primary user interface with the ventilator, including the visual presentation of data, control features, and visual and audible presentation of alarm conditions. The user interacts with the ventilator through the touch pad and rotation of the rotary encoder while observing the result of this input on the display. The information provided on the display varies depending on the state of the ventilator and/or the operations being performed.
The ventilator incorporates a number of safety features and self-diagnostic system. System internal functions are checked automatically at start-up and periodically throughout normal operation. An audible and visual alarm announces failures of principal subsystems. Integrated patient alarms are also provided and are announced on a visual message display area as well as with an audible tone.
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