Male-female differences in forearm skin tissue dielectric constant

Summary Tissue dielectric constant (TDC) measurements at 300 MHz via the coaxial line reflection method are useful to evaluate local skin tissue water and its change, but virtually all available data relate to measurements on women. Because TDC values in part depend on skin thickness, we hypothesize...

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Vydáno v:	Clinical physiology and functional imaging Ročník 30; číslo 5; s. 328 - 332
Hlavní autoři:	Mayrovitz, Harvey N., Carson, Sophia, Luis, Michelle
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	Oxford, UK Blackwell Publishing Ltd 01.09.2010 Blackwell Wiley Subscription Services, Inc
Témata:	Adult Adults Biological and medical sciences Design of experiments Dielectric constant Edema Electric Conductivity Female Forearm Fundamental and applied biological sciences. Psychology Humans Imaging Linear Models Lymphedema lymphoedema Male Males Mathematical analysis Men oedema Permittivity Population studies Position measurement Reflection Sex Factors Skin Skin - metabolism skin water Thickness tissue water Vertebrates: anatomy and physiology, studies on body, several organs or systems Water - metabolism Water Loss, Insensible Women Young Adult Young adults tissue water permittivity skin water oedema Cardiovascular disease Male lymphoedema Lymphatic vessel disease Tissue Vertebrata Forearm Mammalia Lymphedema Female Skin
ISSN:	1475-0961, 1475-097X, 1475-097X
On-line přístup:	Získat plný text
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Popis
Shrnutí:	Summary Tissue dielectric constant (TDC) measurements at 300 MHz via the coaxial line reflection method are useful to evaluate local skin tissue water and its change, but virtually all available data relate to measurements on women. Because TDC values in part depend on skin thickness, we hypothesized that differences in male–female skin may be associated with male–female differences in TDC. To test this hypothesis, we compared TDC values in volar forearm skin of 60 young adult volunteers (30 men, 25·0 ± 2·5 years, 30 women, 27·4 ± 6·6 years) in the seated position using a probe with an effective measurement depth of 1·5 mm. Results showed that TDC values (mean ± SD) for men were significantly greater than for women (33·2 ± 4·0 versus 29·4 ± 2·7, P<0·001) constituting an overall difference of about 13%. This finding suggests that when TDC measurements are used in research or clinical studies in which both men and women are included in a common study population, it would be prudent to consider this difference in both experimental design and data interpretation. This is especially true if absolute TDC values are of interest in contrast to changes in TDC values on the same subject subsequent to time passage or secondary to an intervention. Despite greater TDC values measured in men, calculations of the impact of a greater male skin thickness indicate that the greater TDC values of men may or may not reflect a greater relative local skin tissue water in men compared to women.
Bibliografie:	ark:/67375/WNG-LXG26RX1-2 istex:8EF765A55AFB931CCD933BF8F4A3AFA4DB3415AC ArticleID:CPF946 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 ObjectType-Article-2 ObjectType-Feature-1 content type line 23
ISSN:	1475-0961 1475-097X 1475-097X
DOI:	10.1111/j.1475-097X.2010.00946.x