A study on the quantitative evaluation of skin barrier function
2015
We propose a quantitative evaluation method of skin barrier function using Optical Coherence Microscopy system
(OCM system) with coherency of near-infrared light. There are a lot of skin problems such as itching, irritation and so
on. It has been recognized skin problems are caused by impairment of skin barrier function, which prevents damage
from various external stimuli and loss of water. To evaluate skin barrier function, it is a common strategy that they
observe skin surface and ask patients about their skin condition. The methods are subjective judgements and they are
influenced by difference of experience of persons. Furthermore, microscopy has been used to observe inner structure of
the skin in detail, and in vitro measurements like microscopy requires tissue sampling. On the other hand, it is necessary
to assess objectively skin barrier function by quantitative evaluation method. In addition, non-invasive and nondestructive
measuring method and examination changes over time are needed. Therefore, in vivo measurements are
crucial for evaluating skin barrier function. In this study, we evaluate changes of stratum corneum structure which is
important for evaluating skin barrier function by comparing water-penetrated skin with normal skin using a system with
coherency of near-infrared light. Proposed method can obtain in vivo 3D images of inner structure of body tissue, which
is non-invasive and non-destructive measuring method. We formulate changes of skin ultrastructure after water
penetration. Finally, we evaluate the limit of performance of the OCM system in this work in order to discuss how to
improve the OCM system.
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