Welch Allyn 88372 Cryosurgery System - User Manual - Manual (Page 6)

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General Instructions
Check the gas cylinder to verify that it contains adequate gas. The
pressure gauge should read between 600 and 800 PSI for proper freeze
to occur. A pressure below 600 PSI may not provide enough pressure
for sufficient freeze or defrost.
Securely seat the gas cylinder onto the mobile cart and hold it into
place with the safety chain provided.
Examine the tubing leading from the console to the gun by running the
line between the thumb and forefinger, checking for any kinks or abrupt
bends. A kink in the line can cause a weakness which can erupt under
pressure.
Inspect the “O” ring seal located between the tip and the gun barrel
prior to each use.
Scavenging Hose
A 20’ scavenging hose is provided with the unit to divert the N
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O/CO
2
gas away from the operator and patient to a remote, well-ventilated or
uninhabited area. Push one end of the scavenging hose over the
exhaust muffler on the console (a small amount of mild soapy water on
the inside diameter of the hose will ease this operation) of the cryo
unit and lead the other end o a remote, well-ventilated or uninhabited
area.