MNL-00007 [3] Proprietary and Confidential Page 22 of 63
13. Once the treatment begins press the MODE key one time to view the time counting
down. Allow the device to run until 30 seconds remains. Stand to the side of the device
while waiting.
14. With 30 seconds remaining press the POWER key one time. The system will display the
power output of the lamps. A value such as P9.0 (example) will display. Write down the
value.
15. When the machine shuts off, press the END key two times to clear the treatment and
return the unit to its energy saving mode.
Once you know your power output (9.0 mW/cm2 in the example above) consult the laminated
Backup Time Chart, a partial example of which is included below. The numbers in the top row
of the chart (horizontal axis) represent a range of power output values. Find the value that is
closest to the power output of your device.
The numbers in the left most column (vertical axis) represent a range of treatment doses. Find
your desired dose and trace that row to the right until it intersects with the column corresponding
to the current power output of your device. The backup time is shown where the two lines
intersect. The times are rounded up to the nearest 10-second increment. On the partial time chart
shown below, thirty (30) seconds is the backup time at a power output of 9.0 mW/cm2 and a
dose of 280 mJ.
Note: When calculating your treatment backup time, be sure to use the correct output value for
the distance that you wish to treat from.
Note: Your prescribing physician is the final authority for your treatment. If you have any
questions regarding treatment instructions or dosing information, please contact your physician.
Table 3 Partial UVB Backup Time Chart
The UVA Backup Time Chart (not shown here) is configured the same as the UVB Backup Time
Chart however the doses are listed in Joules and the energy output levels and backup times are
different than the UVB output levels. Each chart is clearly marked.
Note: For your convenience, and as an alternative to the UVB backup time chart, the latest
version of our free iPhone and Android application “Phototherapy Math” is available for
download at the iTunes app store and Android market. It quickly calculates treatment times,
backup safety times, and makes the calculation of dose and time increases simple. If using a PC,
visit www.phototherapymath.com for a web-based calculator and additional information.
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