GE Aestiva 5 Service Manual

6 Illustrated Parts
1006-0939-000      6-76-7
Exhalation valve
Figure 6-3 • Ventilator exhalation valve
1
2
3
4
5 6
AB.23.021
7
Item Description Stock Number
1Exhalation valve cover 1503-3583-000
2Lock ring 1503-3588-000
3Seat exhalation valve 1503-3584-000
4Diaphragm assy 1503-8121-000
5Base, exhalation valve 1503-3585-000
6Blank, pop-off valve 1406-3240-000
7Tube exhalation valve 1406-3566-000 

Aestiva 
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6-8
Figure 6-4 • Breathing circuit modules
Item Description CircleBain-
Mapleson D
1Assembly (items 2-12) 1406-8102-000 1406-8211-000
2M6-1x23 Thumb Screw 1406-3304-000 1406-3304-000
3Seal lens, flow sensor 1406-3395-000 1406-3395-000
4Module Body -------- 1406-3467-000
5Seal module cover 1406-3317-000 1406-3463-000
6Split Ring 1406-3319-00 1406-3319-000
7Back plate 1406-3391-000 1406-3391-000
8O-Ring Check Valve  1406-3397-000 Not Used
9Valve Seat Check Valve  1406-3396-000 Not...

6 Illustrated Parts
1006-0939-000      6-96-9
Bellows
Figure 6-5 • Bellows parts
Item Description Stock Number
1 Bellows housing 1500-3117-000
2Bellows 1500-3378-000
3Rim 1500-3351-000
4Pressure relief valve assy 1500-3377-000
5Latch, rim 1500-3352-000
6Seal, base 1500-3359-000
7Base assembly, bellows 1406-8106-000
1
2
3
4
5
6
7
AB.23.055 

Aestiva 
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6-10
Test tools and system parts
Description Stock Number
Vaporizer port o-rings, external (Qty 6) 1102-3016-000
Cylinder gasket 0210-5022-300
Handle for yoke tee 0219-3372-600
Yoke plug 0206-3040-542
DIN O
2 plug (cylinder connection) 1202-7146-000
Positive low-pressure leak test device (BSI) 1001-8975-000
Positive low-pressure leak test device (ISO) 1001-8976-000
Negative low-pressure leak test device 0309-1318-800
Test lung 0219-7210-300
Krytox 1001-3854-000
Touch-up paint,...

1006-0939-0007-1
7-1
           7 Theory of Operation
   
     and Specifications
In this sectionVentilator theory  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  7-2
Pneumatic circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  7-9
Suction regulator (optional)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  7-12
O
2 flowmeter (optional). . . . . . . . . . . . . . . . . . . . . ....

Aestiva
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Ventilator theory
GeneralThe ventilator pneumatics are at the rear of the breathing system. 
A precision valve controls gas flow to the patient. 
During inspiration, this gas flow closes the exhalation valve and pushes the 
bellows down. 
During expiration, a small flow pressurizes the exhalation diaphragm to supply 
PEEP pressure. 
Volume and pressure measurements come from flow sensors in the flow sensor 
module. Two tubes from each sensor connect to a transducer that...

7 Theory of Operation and Specifications 
1006-0939-0007-37-3
ModesThe system has four modes of mechanical ventilation:
•Volume control mode
•Pressure control mode
•Synchronized intermittent volume (SIMV) mode (optional)
•Pressure support ventilation (PSVPro) mode (optional)
Use the main menu to set the mode. 
Figure 7-1 • Ventilation Setup Menu
Volume control mode
Figure 7-2 • Volume control diagram
Volume Control supplies a set tidal volume. The ventilator calculates a flow based on 
the set tidal...

Aestiva
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7-4
Pressure control mode
Figure 7-3 • Pressure control diagram
Pressure control supplies a constant set pressure during inspiration. The 
ventilator calculates the inspiratory time from the frequency and I:E ratio 
settings. A high initial flow pressurizes the circuit to the set inspiratory pressure. 
The flow then decreases to maintain the set pressure (Pinspired).
Pressure sensors in the ventilator measure patient airway pressure. The 
ventilator automatically adjusts the flow...

7 Theory of Operation and Specifications 
1006-0939-0007-57-5
At the specified time interval, the ventilator will wait for the next inspiratory effort 
from the patient. The sensitivity of this effort is adjusted using the flow trigger level. 
When the ventilator senses the beginning of inspiration it synchronously delivers a 
volume breath using the set tidal volume, and inspiratory time that is set on the ven-
tilator. If the patient fails to make an inspiratory effort during the trigger window time...

Aestiva
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An apnea backup mode is provided in the event the patient stops breathing. 
When setting the backup mode the user adjusts the inspiratory pressure 
(Pinsp), respiratory rate and the inspiratory time (Tinsp). As long as the patient 
triggers the ventilator within the set apnea delay time, the patient will get 
pressure-supported breaths and the ventilator will not deliver machine 
breaths. The apnea delay time can be set from 10 to 30 seconds with the 
default set at 30...