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Photodynamic therapy is a new form of treatment for disorders
and cosmetic indications caused by fast-growing diseased cells
or bacteria. With this particular treatment, a light-activated
drug (photosensitizer) is either administered locally to
target the affected tissue or intravenously to the affected
organ. The photosensitizer concentrates to varying degrees in
different tissue and cell types and accumulates in
fast-growing structures. The photosensitizer only becomes
effective when it is activated by (laser) light. The light is
applied either from outside or endoscopically
via fiber optic wave guides.
The exact siting of the treatment is determined and
monitored through the selective concentration of the
photosensitizer and a local light source. This means that PDT
has relatively few side effects, unlike chemotherapy, for
example.
Photodynamic therapy from biolitec AG is based upon three
key components:
- Phototherapeutic products from biolitec are based on
PChl (photochlorine) and Bpheo (Bacteriopheophorbides),
which are obtained from algae and bacteria and are
available in a highly pure form. The reaction of these
substances is triggered by exposure to red light.
- PhotoSelect is a phototherapy using a low light power,
so there is no thermal damage. Convenient diode lasers in
the 650 nm to 760 nm range are used. The wavelength of the
laser used is that which is absorbed by the
phototherapeutic products and cause their activation.
- Different laser delivery systems are used to apply the
laser light, depending on the application and the organ
concerned. Microlenses, cylinder spots and balloons are
used.
Find out more about biolitec and PDT – download our
biolitec magazine
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