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Symptom
The Manual Vent Valve is
leaking gas
There is a hissing sound
before the needles are
connected
The pressure displayed on
the Gas Indicator indicates
the gas pressure is too low
(Table 7)
During the Needle Integrity
and Functionality Test, the
needle is freezing in the
first 45 seconds of the test
instead of thawing, and
then starts thawing for 15
seconds instead of freezing
It is difficult to loosen the
pressure gauge connected
to the cylinder, or the argon
gas supply line cannot be
disconnected from the argon
inlet connection
Gas begins leaking through
a needle port after gas flow
was started using the Test,
Freeze or Thaw buttons
Potential Causes / Solutions
The Manual Vent Valve may be open� Fully close the Manual Vent Valve�
1� Check that the regulated pressures are within the working pressure limits
(green range on the Gas Indicator display)� The system may be venting to reduce
the pressure to below 4200 psi (289�6 bar, 28�96 MPa) 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 Boston Scientific
Technical Assistance Center�
1� Verify the Argon Shutoff Valve is open�
2� Verify that the argon 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�
The gases are connected incorrectly (e�g�, the helium gas supply line is connected
to the argon cylinder and vice versa)�
• End the procedure�
• Vent the high pressure gas from the system�
• Disconnect the gas supply lines and re-connect them to the correct cylinder�
• Start a new procedure�
• Run the needle test again�
The gas lines were not vented and the gas lines are still under pressure�
WARNING: If it is difficult to loosen the pressure gauge connected to the
cylinder, or the argon gas supply line cannot be disconnected from the argon
inlet connection, do not apply excessive force to release the gas supply line or
to loosen the pressure gauge. The gas line may still be under pressure.
• Verify that the gas cylinders are CLOSED�
• Verify the pressure gauge at the gas cylinder is 0 psi (0 bar, 0 MPa)�
• If in the Procedure Screen , verify the gas pressure display shows no gas connected�
• If the Visual-ICE Cryoablation System is ON, end the procedure and vent the
system using the automatic vent function�
• If still unable to disconnect the gas supply lines, or if the system is OFF, open the
Manual Vent Valve on the rear of the system to completely vent the system�
• Upon completion, close the Manual Vent Valve�
The channel may have a loose or broken socket�
• Disconnect the needle and move the needle to a different channel�
• Conduct the Needle Integrity and Functionality Test again on the needle�
• Contact Boston Scientific Technical Assistance Center�
75
Black (K) ∆E ≤5.0
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