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Narrow Band UVB (311-313 nm)

UVB Narrow Band is a subset of the UVB Wide band or Broad band 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.
 
 
Why Narrow Band?

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:
Now dermatologists can gain the advantage over persistent and chronic cases of psoriasis with UVB Narrow Band technology. Narrow Band UVB has been shown to provide faster clearing of psoriatic plaques when compared to traditional Broad Band UVB.

For Vitiligo:
Today UVB Narrow Band technology is proving to be very useful in the treatment of Vitiligo. It is replacing traditional PUVA phototherapy treatment. UVB Narrow Band requires no photo-sensitizing agents.

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. Narrow Band UVB has proven to be the most effective phototherapy treatment option for thousands of psoriasis patients all over the world. Now with more research being done every day on conditions such as eczema, vitiligo, and mycosis fungoides, Narrow Band UVB continues to show its versatility with its promising results, further demonstrating that it will become the phototherapy treatment option of choice.

 
UVB is different :

     
  • Conventional broad band UVB lamps emit a variety of wavelengths ranging from 280-330 nm.

  • Narrow Band UVB virtually eliminates superfluous and harmful UV by emitting only wavelengths 311-312 nm.

  • Clinical studies show the peak therapeutic effectiveness of UVB to be within the range of 295-313 nm, but wavelengths below 300 nm can cause erythema or severe burning and increase the risk of skin cancer.
 
Benefits of Narrow Band Phototherapy:

  • Eliminating UV in wavelengths below 311 nm permits higher intensities and longer exposure times, so patients can derive the maximum benefit from phototherapy.

  • This increased effectiveness permits more aggressive treatment regimens, resulting in a shorter course of treatment.

  • Extensive researches confirm that patients not only avoid the danger of serious burning from sub-erythemal exposure, they may also enjoy longer remission periods after treatment.
  • Remission periods are similar to those with PUVA therapy and markedly superior to broad band UVB treatment. Studies show 38-40 percent of narrow band treated patients require no additional therapy for at least 12 months.