Intra-day variations in volar forearm skin hydration.

Autor: Mayrovitz HN; Department of Medical Education, Dr. Kiran C. Patel College of Allopathic Medicine, Nova Southeastern University, Fort Lauderdale, USA.
Jazyk: angličtina
Zdroj: Skin research and technology : official journal of International Society for Bioengineering and the Skin (ISBS) [and] International Society for Digital Imaging of Skin (ISDIS) [and] International Society for Skin Imaging (ISSI) [Skin Res Technol] 2024 Jul; Vol. 30 (7), pp. e13849.
DOI: 10.1111/srt.13849
Abstrakt: Background: Skin hydration (SKH) measurements are used for multiple purposes: to study skin physiology, to clinically investigate dermatological issues, and to assess localized skin water in pathologies like diabetes and lymphedema. Often the volar forearm is measured at various times of day (TOD). This report aims to characterize intra-day variations in volar forearm SKH to provide guidance on expected TOD dependence.
Materials and Methods: Forty medical students (20 male) self-measured tissue dielectric constant (TDC) on their non-dominant forearm in triplicate as an index of local skin tissue water every 2 h starting at 0800 and ending at 2400 h. All were trained and pre-certified in the procedure and had whole-body fat (FAT%) and water (H 2 O%) measured. Day average TDC (TDC AVG ) was determined as the average of all time points expressed as mean ± SD.
Results: Males versus females had similar ages (25.1 ± 2.2 years vs. 25.1 ± 1.5 years), higher H 2 O% (56.6 ± 5.0 vs. 51.8 ± 5.7, p = 0.002), and higher TDC AVG (32.7 ± 4.1 vs. 28.5 ± 5.1, p = 0.008). TDC values were not significantly impacted by H 2 O% or FAT%. Female TDC exhibited a significant decreasing trend from morning to night (p = 0.004); male TDC showed no trend.
Conclusion: Skin water assessed by TDC shows some intra-day variations for females and males but with quite different temporal patterns. Clinical relevance relates to the confidence level associated with skin hydration estimates when measured at different times of day during normal clinic hours which, based on the present data, is expected to be around 5% for both males and females.
(© 2024 The Author(s). Skin Research and Technology published by John Wiley & Sons Ltd.)
Databáze: MEDLINE
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