32
EndoProbe and ENT Probe Operator Manual
13103F-EN
Precautions
Protect fiber-optic tip from damage. If damage is suspected to the fiber tip,
discard the probe.
Recommended procedure for clinical use
This section contains general guidelines and is not intended to suggest
treatment techniques. Qualified physicians should review the available
literature presented in clinical papers before using the probe delivery
device. A reference catalog of clinical papers and presentations is available
through IRIDEX Marketing.
Power density and spot size
Tissue response to laser light is primarily determined by power density.
Power density (watts/cm
2
) is laser power divided by the area of the
illuminated spot; therefore, you can increase power density either by
increasing the laser power or by decreasing the spot size.
Power and duration
If you are uncertain of tissue response, always start with the lower power
settings and increase the power until you observe satisfactory clinical
lesions.
Shorter pulse durations require higher power densities to create a burn;
however, very short pulse durations can be potentially dangerous. Longer
pulse durations may be safer to use with the probe.
WARNING
The relationship between
spot size and resultant
power density is not linear.
Halving the spot size
quadruples the power
density. The physician
must understand the
relationships between
spot size, laser power,
power density, and laser/
tissue interaction before
using the probe.
Summary of Contents for EndoProbe
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