PRECAUTIONS
•
This device utilizes high pressure gas and must be used with care to avoid
unexpected release of pressure. Maintenance and care must be taken to avoid
injury to user and patient.
•
Use only medical grade gas under pressure range 600-800 psi (42-56 Kg/cm
2
)
for optimal freeze.
•
Do not store gas cylinders above normal room temperature.
•
It is the operator’s responsibility to fit the exhaust hose between cryosurgical unit
exhaust and disposal point to minimize gas exposure.
•
Do not drag, slide or roll cylinders. Cylinders should be stored upright and
firmly secured to prevent falling or tipping.
•
Do not crimp or tightly bend the gas hose. The hose should be coiled no
tighter than an 8 in. (20.3 cm) circle. A damaged hose must be replaced.
•
Do not use tools to tighten connections. Hand-tightening is all that is required.
•
Before disconnecting the console from the gas cylinder, turn gas cylinder valve OFF.
•
Before changing tips, make sure gas is off at the console.
•
If cryo tips are dropped, they should be returned to the factory for inspection.
GENERAL INSTRUCTIONS
Check the gas cylinder to be certain that it contains adequate gas. The pressure
gauge should read between 600 and 800 psi (42-56 Kg/cm
2
) for proper freezing to
occur. A pressure below 600 psi (42 Kg/cm
2
) may not provide enough pressure for
sufficient freeze or defrost, and is not recommended. The gas cylinder should be
securely seated on the mobile cart, and fastened with the provided safety chain.
The tubing leading from the console to the cryogun should be examined by
running the tube between the thumb and forefinger. Check for any kinks or abrupt
bends. A kink in the line can cause a weakness, which can erupt under pressure.
Located between the tip and the gun barrel is an “O” ring seal, which should be
inspected prior to each use.
Before each use, test for proper operation by following the instructions below,
except point the tip towards the floor while squeezing the trigger for several
seconds.
SCAVENGING HOSE
A twenty-foot (6.1 m) scavenging hose (P/N 3012-0314) is provided with the unit to
divert gas away from the operator and patient to a remote, well-ventilated area.
One end of the scavenging hose should be pushed over the exhaust muffler on
the console of the cryo unit (mild soapy water will ease this operation), and the
other end should lead to a remote, well-ventilated area.
LM-900 Cryosurgery System • Directions for Use • English
(continued)
4
