User's Manual Part 5

8065751131 6.17
6. Set the power below the nominal titration level by turning the Power Adjust knob on
the
PurePoint
™
console counterclockwise. If the power parameter is not set below
™
console counterclockwise. If the power parameter is not set below
™
the nominal titration level, the message “Set Power < xxxx mW” will appear on the
display.
7. If necessary press the Reset key to reset the shot counter to 0.
You can now adjust exposure time, aiming beam power, and treatment beam power.
8. Select exposure time by pressing the Exposure Time Adjustment arrow keys. If
Continuous Wave mode is selected, “Mode: Continuous” is displayed.
WARNING!
Verify that all personnel are wearing protective eyewear (OD 4 or above at 532 nm)
as soon as the system is in Standby/Ready mode, as well as during treatment.
NOTE: It is not recommended to use exposure times longer than 2 seconds in CW
(Continuous Wave) mode. Depending on the thermal load, the system may
shut down prior to the footswitch being released. A message will appear on the
display indicating this condition.
9. Select the aiming beam intensity by turning the Aiming Beam Intensity knob.
WARNING!
Do not attempt treatment if aiming beam is not present. Patient injury may occur.
10. Turn the Power Adjust knob to set the desired treatment power.
11. Select the laser spot size using the Laser Spot Size Lever (see Figure
6-12). The
positions of the Laser Spot Size lever for large (approximately 1mm) and small
(approximately 0.5mm) laser spot sizes are marked with large and small black dots on
the right side of the box, respectively. The change of laser spot size from large to small
results in approximately four times increase in irradiance within the treatment area,
provided that laser power was not adjusted.
It is recommended to adjust laser power each time the Laser Spot Size Control setting
is changed. Start with a low power, short duration pulse then increase until the desired
coagulation result is achieved.
WARNING!
If unsure which settings are required, select a low power, short duration, and large
laser spot size. Failure to properly adjust delivered energy may lead to patient
injury.