Device for protection against the sun and application of substance to the skin
AssigneeMedeikonos AB
InventorFredrik Gudmundsson
Life of this patent
Estimating the term…
Abstract
The invention relates to a device for protecting a skin area against light when detecting and/or treating skin disorders, especially cancer and its preliminary stages, including application of compounds and/or compositions to the skin, in connection with which a photoreactive substance appears in the skin area. The device comprises an opaque foil (1) forming a cavity (4) relative to the skin and having edges (3) engaging the skin, the width of the edges (3) being determined by formula (I), wherein m=the width of the edge, δ=the penetration depth of the light in the skin, In=the natural logarithm, t=the time of the effect of the light, I0=the luminous intensity at the skin surface, and Ddiffused=the diffused energy dose which is allowed to reach the skin area concerned.
Claims12
A device for protecting a skin area against light when detecting and/or treating skin disorders, including application of at least one of compounds and compositions to the skin, in connection with which a photoreactive substance appears in the skin area, wherein the device comprises an opaque foil forming a cavity relative to the skin and having edges engaging the skin, the width of the edges being determined by the formula:
- m>δ·ln(t·I0/Ddiffused)
- wherein
- m=the width of the edge,
- δ=the penetration depth of the light in the skin,
- ln=the natural logarithm,
- t=the time of the effect of the light,
- I0=the luminous intensity at the skin surface, and
- Ddiffused=the diffused energy dose which is allowed to reach the skin area concerned.
Dependencies are inferred from the claim text.