GE Healthcare Aestiva_5 MRI anesthesia machine - Manual (Page 7)

Breathing circuit specifications
Operational modes
Breathing circuit
modules:
Interchangeable circle or bain (Mapleson D)
Carbon dioxide absorbent canisters (2)
Absorbent
capacity:
1.35 kg/3 lb each
Canister
release:
Integrated sensing mechanism,
CO
2
bypass capability (optional)
Ports and connectors
Exhalation: 22 mm OD ISO 15 mm ID taper
Inhalation: 22 mm OD ISO 15 mm ID taper
Bag port: 22 mm OD
Pressure gauge
Scale range: 0 to 10 kPa/–20 to 100 cm H
2
0
Bag-to-Ventilator switch
Type: Bi-stable
Control: Controls ventilator and direction of
breathing gas within the circuit.
Materials
All materials in contact with exhaled patient gases are
autoclavable, except standard flow sensors.
All materials in contact with patient breathing gases
are free of natural rubber latex.
Breathing circuit parameters
Compliance: Bag mode Mechanical mode
5.15 mL/cm H
2
O Automatically compen-
sates for compression
losses within the absorber
and bellows assembly.
Circuit volume: 5.5 L
Expiratory
resistance:
P
insp
P
exp
Flow rate Pressure drop Pressure drop
10 L/min 0.74 cm H
2
O 1.00 cm H
2
O
30 L/min 2.32 cm H
2
O 2.36 cm H
2
O
60 L/min 5.93 cm H
2
O 5.26 cm H
2
O
Integrated Adjustable Pressure Limiting (APL) valve
Range: 0.8 to 70 cm H
2
0
Tactile knob
indication at:
30 cm H
2
0 and above
Adjustment
range
of rotation:
0.8 to 30 cm H
2
O/0 to 230°
30 to 70 cm H
2
O/230 to 330°
Anesthetic gas scavenging
Type Market Hospital Machine
system connection
required
Active low flow: US and others High vacuum DISS evac
36 L/min
(300 mmHg)
@ 12 in Hg
Active low flow Japan Adjustable 12.7 mm/
without flow Venturi with 0.5 in
indicator: flowmeter hose barb
> 30 L/min
Active high flow: UK/related Low vacuum 30 mm/1.2 in
40 - 130 L/min BSI Male
threaded
Passive: Germany Venturi 25mm/0.98 in
50 L/min hose barb
Passive: Generic Passive or 30 mm/1.2 in
externally M ISO taper
attached
active system
Passive: Sweden Venturi/Ejector 12 mm/0.47 in
Norway > 30 L/min hose barb
Passive: Denmark Venturi/Ejector 8 mm/0.31 in
> 30 L/min
hose barb
AN3175-E.qxd 19.6.2006 12:37 Sivu 7