Galil Visual-ICE MRI, Руководство пользователя

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Visual-ICE
™
MRI Cryoablation System
10-7
Symptom Potential Causes / Solutions
No helium gas is delivered to the needle 1. The helium gas cylinder valve may be closed.
Open the gas cylinder valve by turning the valve
counterclockwise to allow sufficient gas flow. Verify
that appropriate pressure is displayed on the Gas
Indicator.
2. The needle may be clogged.
•
Press the Stop button to stop all activity on the
channel.
• Hold the needle connector firmly with one
hand and unlock the channel to disconnect the
needle.
• Move the needle to a different channel and run
the test again.
NOTE : If only one needle is connected to the
system, there may be some residual pressure
behind the needle connector.
3. If the problem persists, replace the needle with a
new needle.
The Manual Vent Valve is leaking gas The Manual Vent Valve may be open. Fully close the
Manual Vent Valve.
There is a hissing sound before the
needles are connected
1. The system may be venting to reduce the pressure
to below 4200 psi to prevent damage to the system.
If the pressure drops to within working pressure
range, the system will operate normally.
2. The Automatic Vent Valve may be stuck open. If the
manual vent valve is fully closed and the hissing
persists, shut down the system and contact Galil
Medical Customer Service.
The pressure displayed on the Gas
Indicator indicates the gas pressure is
too low (Table 4-2)
1. Verify the Argon Shutoff Valve is open.
2. Verify that the gas cylinder valve is sufficiently
opened to allow gas flow. If necessary, open the
valve approximately another half turn.
3. Verify that the cylinder contains sufficient pressure
using the gauge on the cylinder.
4. Replace the cylinder, if needed.