1. Adjust for a higher
relief pressure as in
to a lower peak
steps (6)(a) through (f)
Leak in the
2. Check and secure all
connections except the
expiratory tubing as
outlined in step (6)(b)
3. Replace the valve.
4. Replace the reed alarm
does not sound
if adjustment step (6)(d)
will not compensate.
Table 2-8. Pressure relief valve troubleshooting.
Mark-2 timing system.
(a) Rotate the mode selector switch to CONTROLLED IMV ON. The
Babybird ventilator should commence rapid cycling.
(b) Use a stop watch to determine the cycling frequency. The Mark 2
must be capable of cycling at least 100 cycles per minute.
(c) If the cycling frequency of the Mark 2 is less than 100 cycles per
minute, refer to step (d), troubleshooting, before continuing with calibration of the
inspiratory relief pressure valve.
(d) Use the procedures outlined in Table 2-9 to troubleshoot the Mark-2
Inspiratory relief pressure valve.
(a) Check for a single cam stop secured at the 3 o'clock position
(figure 2-6) on the inspiratory relief pressure control valve.