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Mira, Inc.*414 Quaker Highway * Uxbridge, MA 01569 * Tel: 508-278-7877 * 800 847-6472 * Fax: 508-278-4555 p.
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6.0
TEST PROCEDURE
-
To be performed prior to patient treatment
6.1
Select an Ophthalmic Cryo Probe
and unscrew the protective cap
from the probe jack.
6.2
Insert the probe jack all the way into the receptacle on the front panel.
IMPORTANT
: When the probe is not in use, the protective cap should be kept on the
probe jack to prevent foreign matter and moisture from entering the probe system during
handling, cleaning and sterilizing. (See section 8.0).
6.3
PRECONDITION PROBES
- To assure proper probe operation,
gas must be purged
from the probes prior to their use.
To properly purge gas from a probe, follow the
procedure below,
6.3.1
. Set the front panel valve “ON/OFF” switch to “ON”
6.3.2.
Verify there is a minimum of 680psi gauge of pressure. Check the pressure gauge
Indicator, it should be in the green zone. (680-900psi gauge)
6.3.3
. Select the -25º C temperature setting for Nitrous Oxide (N
2
O)
Select the -5º C temperature setting for Carbon Dioxide (CO
2
)
6.3.4
. Depress the foot pedal for 10 seconds and then release.
6.3.5
. Wait 60 seconds while the exhaust gas is escaping from the rear scavenger port.
IMPORTANT;
Most of the purging occurs during the last 30 seconds of the purge
cycle.
6.3.6.
Repeat steps 6.3.4.and 6.3.5.twice
.
This will remove internal condensation as well
as restore ambient temperature to the system.
6.3.7.
The system is now ready for use.
Should you wish to perform an “ice ball” test, proceed as follows;
Remove probe tip cap. Submerge the tip into a solution of sterile saline and
depress the foot pedal for 10seconds, keeping the tip in the solution. After
ten seconds, with the foot pedal depressed, remove the probe tip from the
solution. An ice ball of 1.5 to 2.5 mm larger than the diameter of the probe
tip should have been formed. Release the foot pedal. In about 4 seconds, the
ice ball should be free to move when tipping the probe.
6.4
.
To remove the probe, allow the gas to dissipate for approximately 60 seconds. This
relieves the gas pressure in the system. If the probe must be removed quickly, turn the
“ON/OFF” valve to “OFF” while depressing the foot-switch. This action depressurizes
the system instantly.