Pulmonetic Systems LTV 950 - Page 210

Page 15-10 LTV
®
Series ventilator Operator’s Manual
p/n 10664, Rev. Y
Symptoms Possible Causes What to Do
Circuit leak. Run a leak test and reseat or replace the leaking
parts or connections. See page 11-8 for
instructions.
Sense lines are
reversed.
The sense lines are not designed to be removed
from either the wye or the luer fittings. If the
sense lines have been removed and replaced
incorrectly, they may not seal correctly when
replaced. Replace the patient wye and sense
lines with a known good assembly.
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.
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.
Pressure Control or
Pressure Support set
below PEEP.
Verify the control values are appropriately set.
Failed autozero. Perform an autozero under XDCR ZERO. See
page 10-23 for more information.
Leak Compensation is
not on.
Verify that the Leak Compensation extended
features option is set to On (default setting is on).
See page 10-12 for instructions.
Sensitivity does not
appear to be
accurate.
Ventilator is
autocycling.
Failed calibration or
internal problem with
the ventilator.
Immediately contact a certified Pulmonetic
Systems’ service technician.
O
2
% is high. O
2
inlet pressure too
high when Low O
2
Source selected.
O
2
inlet flow too high
when Low O
2
Source
selected.
Verify the low pressure O
2
inlet has been
correctly calculated and set using the Input O
2
Flow Chart (see page 6-15).
Pulmonetic Systems recommends the use of an
O
2
monitor to verify delivered O
2
%. Adjust the
entrained O
2
flow so the monitored value shows
the desired FIO
2
. (See pages 6-13 and 6-18 for
information on using the Low O
2
Source and
O
2
% features.)