(c) Adjust the flow for 10 lpm and rotate the nebulization-control stem
fully clockwise (maximum). Pressure on the test gauge should be 12 to 16psig.
(d) With the nebulization stem turned fully clockwise, apply Lubewick
(P/N 042) to the 0-ring on the outside of the valve-retention cap and secure the control
knob with the index clockwise against the 6 o'clock cam stop (figure 2-4).
Figure 2-4. Nebulizer control knob.
(e) Rotate the control knob fully counterclockwise (minimum) and
observe the test gauge for a pressure range of 2 to 6psig.
(f) If the pressures observed are not within the acceptable range,
proceed to the troubleshooting procedures in Table 2-5.
(g) If the nebulization control parameters are acceptable at both the
minimum and maximum settings, remove the test gauge and reconnect the nebulizer jet
line into the Babybird (push and twist).
(a) Ensure the mode selector is still adjusted for spontaneous breathing
and the outflow valve is open (fully clockwise).
(b) Adjust the flow to 10 lpm. The airway manometer should register
between 2 to 4cmH20. This is caused by the resistance of the breathing circuit to the
(c) Rotate the expiratory-flow valve stem fully counterclockwise. The
sub-ambient pressure observed on the manometer should register at least -10cmH20.
1 To limit the maximum sub-ambient pressure to -10cmH20 (not
mandatory), use a 1/2-inch open-end wrench to remove the retention cap on the valve