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For newly diagnosed patients, a skin phototoxicity test should be
performed, that is perform the minimum erythema dose (MED)
test based on the type of UV band used.
4.1.2 Equipment operational procedure
Operator The operator put on the goggles. .
Check when turn on the equipment
The MED test
Use the biological dose (MED) as the dosage unit for UV treatment due
to significant individual differences in UV sensitivity. The so-called
biological dose, that is, the irradiation time of which causing the
erythema reaction to be just visually recognized (visible) by the light
source irradiated at a certain distance. The results of the test are
preferably observed 24 hours after the irradiation. Determining the MED
value can help the dermatologist with selecting the appropriate initial
therapeutic dose. For specific test methods, please refer to the section
4.3.1.
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