Covidien Puritan Bennett 700 Series, Руководство по обслуживанию

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Self-tests
3-18 10070389 Rev. A Puritan Bennett™ 700 Series Ventilator System Service Manual
8
Circuit comp test Pressurizes system to 10, 40, and
70 cmH
2
O (flow of 10 L/min).
Measures exhalation pressure,
cylinder pressure, and piston
position for each pressure, and
averages each value at all three
positions. Verifies that
compliance is between 1 and
12 mL/cmH
2
O (adult circuits) or
between 1 and 8 cmH
2
O
(pediatric circuits). If test fault is
overridden, compliance defaults
to 2.5 mL/cmH
2
O (adult circuit)
or 1.5 mL/cmH
2
O (pediatric
circuit).
1. Verify leak test (test 7) has passed.
2. Verify tubing setup is correct, that all
tubing connections and wye block are
secure, and that tubing has no apparent
leaks.
3. Verify both inspiratory and expiratory
filters are properly installed.
4. Verify safety valve is closed during this test.
9
I/E filter test Establishes flow of 100 L/min
(adult circuits) or 40 L/min
(pediatric circuits). Makes four
separate pressure measurements
with limbs disconnected/
connected, to determine
pressure drops. Verifies total
pressure drop across each limb,
including filter, is ≤ 5 cmH
2
O
(adult circuits) or ≤ 3 cmH
2
O.
Considers an occlusion to have
occurred if pressure drop
exceeds 80 cmH
2
O during test.
1. Make sure operator correctly performed
required actions.
2. Replace inspiratory filter.
3. Replace expiratory filter.
4. Check for an occlusion in inspiratory or
expiratory limb.
10
PEEP system test Commands PEEP pump to deliver
5, 10, 15, 20, 25, 30, and
35 cmH
2
O. Measures resulting
PEEP pressures and verifies all
are within range. Updates
calibration table in NVRAM as
required (provided measured
pressures are in range) and then
reruns PEEP system test to verify
calibration.
1. Verify leak test (test 7) has passed.
2. Verify tubing setup is correct, that all
tubing connections and wye block are
secure, and that tubing has no apparent
leaks.
3. Rerun the test and check that the PEEP
pump gradually increases its displacement
as the test proceeds.
4. Verify voltage to PEEP pump is between
+23 and +25 V.
5. Recalibrate PEEP pump.
6. Verify exhalation solenoid tubing
connections are secure.
7. Check exhalation solenoid resistance (95 to
126
Ω)
. Replace solenoid, as required.
8. Replace PEEP pump inlet filter.
9. Replace PEEP pump.
Table 3-9: EST troubleshooting (continued)
EST
test no.
Test name
How the ventilator performs the
test
Corrective action