Age-related changes in male forearm skin-to-fat tissue dielectric constant at 300 MHz.
Identifieur interne : 000797 ( Main/Exploration ); précédent : 000796; suivant : 000798Age-related changes in male forearm skin-to-fat tissue dielectric constant at 300 MHz.
Auteurs : Harvey N. Mayrovitz [États-Unis] ; Alexandra Grammenos [États-Unis] ; Kelly Corbitt [États-Unis] ; Simona Bartos [États-Unis]Source :
- Clinical physiology and functional imaging [ 1475-097X ] ; 2017.
Descripteurs français
- KwdFr :
- Adulte, Adulte d'âge moyen, Avant-bras, Eau corporelle (métabolisme), Facteurs de l'âge, Humains, Impédance électrique, Jeune adulte, Mâle, Peau (métabolisme), Spectroscopie diélectrique (normes), Sujet âgé, Sujet âgé de 80 ans ou plus, Tissu adipeux (métabolisme), Valeurs de référence, Vieillissement (métabolisme).
- MESH :
English descriptors
- KwdEn :
- MESH :
- metabolism : Adipose Tissue, Aging, Body Water, Skin.
- standards : Dielectric Spectroscopy.
- Adult, Age Factors, Aged, Aged, 80 and over, Electric Impedance, Forearm, Humans, Male, Middle Aged, Reference Values, Young Adult.
Abstract
Prior research suggests that tissue dielectric constant (TDC) values are useful to assess localized skin water in females for early diagnosing breast cancer treatment-related lymphoedema and TDC values in young adults have shown gender differences. However, no TDC data are available for older males nor have ageing effects been studied despite known shifts in water state and other skin age-related changes. Thus our goals were to (i) characterize TDC values at various skin depths in young and older males, (ii) determine the dependence of these values on body composition parameters and (iii) establish inter-arm TDC ratios for use as normal male reference values. TDC measurements were made to depths of 0·5, 1·5, 2·5 and 5·0 mm bilaterally on volar forearm skin in 60 males in three groups of 20 that had mean ages ± SD of 24·0 ± 0·9, 40·0 ± 12·9 and 71·0 ± 8·0 years. Total body fat and water percentages were determined via bioimpedance at 50 KHz. Results showed that (i) for all age groups TDC values decreased with increasing depth, (ii) TDC values were not statistically different among age groups except at a depth of 0·5 mm, (iii) TDC values were highly negatively correlated with total body fat and (iv) inter-arm ratios varied little among age groups and depths. It is concluded that (i) age-related larger TDC values at only the shallowest depth is consistent with skin water shifting state from bound to more mobile in the oldest group and (ii) inter-arm ratios at any depth provide a basis to test for unilateral oedema.
DOI: 10.1111/cpf.12286
PubMed: 26278683
Affiliations:
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Lauderdale, FL, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>College of Medical Sciences, Nova Southeastern University, Ft. Lauderdale, FL</wicri:regionArea><placeName><region type="state">Floride</region></placeName></affiliation></author></analytic><series><title level="j">Clinical physiology and functional imaging</title><idno type="eISSN">1475-097X</idno><imprint><date when="2017" type="published">2017</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Adipose Tissue (metabolism)</term><term>Adult</term><term>Age Factors</term><term>Aged</term><term>Aged, 80 and over</term><term>Aging (metabolism)</term><term>Body Water (metabolism)</term><term>Dielectric Spectroscopy (standards)</term><term>Electric Impedance</term><term>Forearm</term><term>Humans</term><term>Male</term><term>Middle Aged</term><term>Reference Values</term><term>Skin (metabolism)</term><term>Young Adult</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Adulte</term><term>Adulte d'âge moyen</term><term>Avant-bras</term><term>Eau corporelle (métabolisme)</term><term>Facteurs de l'âge</term><term>Humains</term><term>Impédance électrique</term><term>Jeune adulte</term><term>Mâle</term><term>Peau (métabolisme)</term><term>Spectroscopie diélectrique (normes)</term><term>Sujet âgé</term><term>Sujet âgé de 80 ans ou plus</term><term>Tissu adipeux (métabolisme)</term><term>Valeurs de référence</term><term>Vieillissement (métabolisme)</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Adipose Tissue</term><term>Aging</term><term>Body Water</term><term>Skin</term></keywords><keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Eau corporelle</term><term>Peau</term><term>Tissu adipeux</term><term>Vieillissement</term></keywords><keywords scheme="MESH" qualifier="normes" xml:lang="fr"><term>Spectroscopie diélectrique</term></keywords><keywords scheme="MESH" qualifier="standards" xml:lang="en"><term>Dielectric Spectroscopy</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Adult</term><term>Age Factors</term><term>Aged</term><term>Aged, 80 and over</term><term>Electric Impedance</term><term>Forearm</term><term>Humans</term><term>Male</term><term>Middle Aged</term><term>Reference Values</term><term>Young Adult</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Adulte</term><term>Adulte d'âge moyen</term><term>Avant-bras</term><term>Facteurs de l'âge</term><term>Humains</term><term>Impédance électrique</term><term>Jeune adulte</term><term>Mâle</term><term>Sujet âgé</term><term>Sujet âgé de 80 ans ou plus</term><term>Valeurs de référence</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Prior research suggests that tissue dielectric constant (TDC) values are useful to assess localized skin water in females for early diagnosing breast cancer treatment-related lymphoedema and TDC values in young adults have shown gender differences. However, no TDC data are available for older males nor have ageing effects been studied despite known shifts in water state and other skin age-related changes. Thus our goals were to (i) characterize TDC values at various skin depths in young and older males, (ii) determine the dependence of these values on body composition parameters and (iii) establish inter-arm TDC ratios for use as normal male reference values. TDC measurements were made to depths of 0·5, 1·5, 2·5 and 5·0 mm bilaterally on volar forearm skin in 60 males in three groups of 20 that had mean ages ± SD of 24·0 ± 0·9, 40·0 ± 12·9 and 71·0 ± 8·0 years. Total body fat and water percentages were determined via bioimpedance at 50 KHz. Results showed that (i) for all age groups TDC values decreased with increasing depth, (ii) TDC values were not statistically different among age groups except at a depth of 0·5 mm, (iii) TDC values were highly negatively correlated with total body fat and (iv) inter-arm ratios varied little among age groups and depths. It is concluded that (i) age-related larger TDC values at only the shallowest depth is consistent with skin water shifting state from bound to more mobile in the oldest group and (ii) inter-arm ratios at any depth provide a basis to test for unilateral oedema.</div></front></TEI><affiliations><list><country><li>États-Unis</li></country><region><li>Floride</li></region></list><tree><country name="États-Unis"><region name="Floride"><name sortKey="Mayrovitz, Harvey N" sort="Mayrovitz, Harvey N" uniqKey="Mayrovitz H" first="Harvey N" last="Mayrovitz">Harvey N. Mayrovitz</name></region><name sortKey="Bartos, Simona" sort="Bartos, Simona" uniqKey="Bartos S" first="Simona" last="Bartos">Simona Bartos</name><name sortKey="Corbitt, Kelly" sort="Corbitt, Kelly" uniqKey="Corbitt K" first="Kelly" last="Corbitt">Kelly Corbitt</name><name sortKey="Grammenos, Alexandra" sort="Grammenos, Alexandra" uniqKey="Grammenos A" first="Alexandra" last="Grammenos">Alexandra Grammenos</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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