Pressure relief valve.
(a) Adjust the flow from 10 lpm and remove the red patient-exhalation
tubing attached to the bottom of the shuttle valve.
(b) Block the end of the disconnected tubing and observe the
manometer for a pressure rise and plateau at 65mmHg (88cmH20). You should be
hearing the audible alarm at this pressure.
Reconnect the red tubing into the shuttle valve.
Mark 2 timing system, inspiratory time and expiratory time.
(a) Rotate mode selector to CONTROLLED IMV ON.
(b) Rotate both the inspiratory and expiratory time-control knobs fully
counterclockwise. The Babybird ventilator should cycle at least 100 cycles per minute.
(c) Rotate both the inspiratory and expiratory time-control knobs
clockwise against the face plate stops. Check for a 2.5 second (plus or minus 0.2
second) inspiratory time and an 8 to 10 second expiratory time.
Inspiratory relief pressure.
(a) Rotate the inspiratory relief pressure-control knob fully clockwise.
(b) Confirm a peak inspiratory pressure of 80 to 82cmH2O and then
rotate this control knob fully counterclockwise for a peak cycling pressure of 8 to
Adjust the inspiratory relief pressure control knob to the 12-o'clock
(10) Inspiratory time limit.
(a) Rotate the expiratory-flow-gradient control clockwise until the
manometer needle registers zero.
(b) Back out (but do not remove) the stop screw on the inspiratory time
knob flange and then rotate this knob fully clockwise.
Set the inspiratory time-limit control knob to 3 seconds (12 o'clock).
(d) An inspiratory lockout should occur at 3 seconds (plus or minus 0.2
second), followed by the alarm.