Fraxel
®
1550, Fraxel 1927 and Fraxel DUAL 1550/1927 Laser System
Part Number 10-05170 Rev. O
Page 38 of 92
2.4.5
Interpreting “Estimated kJ” Values
The “Estimated kJ” value provided by the system is calculation-based. The calculated
energy estimate incorporates the surface area of the treatment region, as measured by the
Operator, and the intended treatment level. After treatment is completed, the system will
display the “Actual kJ” reading. If the “Estimated kJ” reading is more than the “Actual kJ” of
energy delivered to the patient, the Operator may not have administered the treatment as
intended. Several technique-dependent factors may reduce the amount of energy delivered
to the patient, including: rapid hand speed, inappropriate delivery of treatment passes,
omission of sections within a treatment region, etc.
CAUTION: Measurement guidelines are intended to support the measurement
process. However, proper measurements must be performed by the Operator.
Inaccuracies in surface area measurements would compromise the interpretation of
estimated kJ calculations. Estimated kJ values are intended only to guide the
assessment of energy delivered during treatment, not to replace physician
assessment of treatment adequacy or assessment of clinical outcome.
2.4.6
Combination Wavelength Treatments
When combining both wavelengths in one treatment session, please note you must only
tap
once
on your chosen wavelength from the Home Screen.
After performing a treatment on a patient, using either wavelength, and then switching to the
second wavelength, it is important to tap the wavelength button
only ONCE
. If you tap the
screen twice (or any “even” number of screen taps), by mistake, the Total kJ count will
appear transposed from one wavelength to the other. This is a minor software bug that will
be rectified in future software updates, but can easily be avoided by ensuring your staff
conforms to the “one tap” protocol.
If you “double tap” the screen by mistake, tap the same button a third time to correct.
Please note, there is no safety issue and the transposition of Total kJ count does not impact
tip life in any way, nor does it actually change the total kJ count for either wavelength. It can
simply be confusing to the clinician if one desires to record the kilo Joule count prior to
switching wavelengths.
