CareFusion LTV 1200 Service Manual page 88

Symptoms
Delivered pressure is
low, PEEP is low,
ventilator is auto
cycling.
Delivered pressure is
low.
Monitored pressure is
low.
p/n 18603-001, Rev. J
Possible Causes
Circuit leak.
High or low side sense line
or elbow at patient wye
loose or leaking.
High or low sense lines are
occluded.
High or low sense ports in
the wye are occluded.
Exhalation drive line
leaking or loose.
Exhalation valve leaking
during inspiration.
Sense lines are reversed.
Leak Compensation is not
on.
®
LTV 1200, 1150, and 1100 Ventilator Service Manual
What to Do
Run a Leak Test and reseat or replace the
leaking parts or connections. See Leak
Test in Chapter 6 for instructions.
Check high and low pressure sense lines
to be sure they are correctly attached and
securely seated at both the ventilator and
wye ends.
Check the Luer fitting connections for
leaks.
Check the elbow connectors at the wye to
be sure they have not loosened or been
broken loose.
Verify lines are not occluded or pinched.
Check the exhalation drive line at both the
ventilator and exhalation valve ends. Verify
the line is securely seated and not leaking.
Check the exhalation drive line at both the
ventilator and exhalation valve ends. Verify
the line is securely seated and not leaking.
Verify the exhalation valve is not leaking
during inspiration. If it is leaking, open the
exhalation valve and remove the
diaphragm. Reseat the diaphragm and
snap the valve cap back in place. See
Cleaning the Reusable Exhalation Valve
and Patient Circuit in Chapter 4 for a
diagram of the exhalation valve assembly.
If necessary, replace the exhalation
diaphragm, or exhalation valve with a new
one.
The sense lines are not designed to be
removed from either the wye or the Luer
fittings. If the sense lines have been
removed, they may not seal correctly
when replaced. Replace the patient wye
and sense lines with a known good
assembly.
Verify that the Leak Compensation
Extended Features option is set to On
(default setting is off). See the LTV
1150, or 1100 Ventilator Operator's
Manual for more information.
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1200,
Page 7-11