Title :
Gravimetric Method for in Vitro Calibration of Skin Hydration Measurements
Author :
Martinsen, Ørjan G. ; Grimnes, Sverre ; Nilsen, Jon K. ; Tronstad, Christian ; Jang, Wooyoung ; Kim, Hongsig ; Shin, Kunsoo ; Naderi, Majid ; Thielmann, Frank
Author_Institution :
Univ. of Oslo, Oslo
Abstract :
A novel method for in vitro calibration of skin hydration measurements is presented. The method combines gravimetric and electrical measurements and reveals an exponential dependency of measured electrical susceptance to absolute water content in the epidermal stratum corneum. The results also show that absorption of water into the stratum corneum exhibits three different phases with significant differences in absorption time constant. These phases probably correspond to bound, loosely bound, and bulk water.
Keywords :
bioelectric phenomena; biomedical measurement; calibration; density measurement; skin; water; absolute water content; electrical measurements; electrical susceptance; epidermal stratum corneum; gravimetry; in vitro calibration; skin hydration measurement; Absorption; Biomedical measurements; Calibration; Clinical diagnosis; Electric variables measurement; Epidermis; Frequency measurement; In vitro; Physics; Skin; Bioelectric phenomena; epidermis; stratum corneum; water; Adult; Body Water; Calibration; Electric Conductivity; Humans; Humidity; Male; Norway; Skin Absorption; Skin Tests; Water;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
DOI :
10.1109/TBME.2007.912651
