BTG Visual-ICE, Руководство пользователя

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Visual-ICE™ Cryoablation System
4-9
Screen 4-8. No Gas Connected message
Table 4-2. Working Gas Pressures
Gas Nominal Working Pressure Working Pressure Limits
Argon
3500 psi 3200 – 3800 psi
241 bar 221 – 262 bar
24.1 MPa 22.1 – 26.2 MPa
Helium
2200 psi 1800 – 2500 psi
152 bar 124 – 172 bar
15.2 MPa 12.4 – 17.2 MPa
NOTE: When helium is not connected, active thawing can be conducted with an i-Thaw-capable
cryoablation needle. The system will flow argon gas at 500 psi (34 bar, 3.4 MPa) through the needle
and will energize the internal heating element of the i-Thaw-capable needle when the Thaw button is
pressed.
CAUTION.
•
When the gas cylinder pressure falls below the lower working pressure limit, the system
displays an alert message in the
Navigation Tool Bar.
To ensure optimal performance,
replace a gas cylinder if the pressure falls below the lower working pressure limit.
•
Failure to operate the Visual-ICE System within the working pressure limits may affect the
cryoablation procedure.
• If the system produces a continuous hissing sound, verify that the Manual Vent Valve is fully
closed. If the Manual Vent Valve is fully closed and the hissing sounds persists, shut OFF the
system using the power control knob located on the front of the system (Figure 2-1). Close
the gas supplies using the cylinder valves. Contact Galil Medical Customer Service.
4.1.3 Gas Line Flushing
After argon is connected and the gas lines pressurized, the Visual-ICE System automatically
conducts gas line flushing to reduce potential gas line contaminants.
• When argon is connected to the system and the gas lines pressurized prior to pressing Start
Procedure , the automated flushing will occur before the Procedure Screen is displayed.
• When the Procedure Screen is displayed before the argon is connected, automated flushing
will occur after the connected gas pressurizes the lines.
During the flushing procedure, a sequence of gas flow, followed by an idle period, will occur three
times.
• Gas will flow for 3 seconds.
• An idle period of 30 seconds will follow the gas flow.
•
The automated flushing process will be completed in ~ 90 seconds.
As the system conducts gas line flushing, the screen displays Optimizing Lines.