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UVB Narrow Band UVB Narrow Band. UVB Narrow Band is a subset of the UVB Wideband or Broadband spectrum. The UVB band comprises the range of wavelengths between 290 nm and 320 nm while UVB Narrowband is a "narrow band" of wavelengths centered at roughly 311 nm.
UVB Narrow Band causes less sun burning or erythemal effect than other treatments such as UVB Broadband. The chart above shows that the skin's erythemal (sun burning sensitivity) is at its max at around 297 nm and that UVB NB with it's spectra centered around 311-313 nm generates very low erythemal response. This allows the user to have longer treatment times before "seeing" an erythemal response. UVB NB is fast becoming the recommended treatment to replace Broadband UVB and PUVA. Most of Amjo's sales today are UVB Narrow Band units. Clinical studies have shown that the peak therapeutic effectiveness of UVB to be between 295 to 313 nm and that wavelengths below (shorter) than roughly 300 nm are more likely to cause a strong erythemal response or severe burning. UVB Narrow Band is in the 311-313 nm range and causes less burning than shorter wavelengths. For Psoriasis
For Vitiligo
One can find UVB Narrow Band Bulbs in the following systems:
It is said that because the shorter wavelengths are eliminated and that exposure times can be increased. The 311-313 nm range is less than 1% of the total range of wavelengths from sunlight, it is a powerful and targeted treatment. |
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