Infrared thermal imaging as a method to evaluate heat loss in newborn lambs.
Identifieur interne : 000982 ( PubMed/Checkpoint ); précédent : 000981; suivant : 000983Infrared thermal imaging as a method to evaluate heat loss in newborn lambs.
Auteurs : L. Labeur [Australie] ; G. Villiers [France] ; A H Small [Australie] ; G N Hinch [Australie] ; S. Schmoelzl [Australie]Source :
- Research in veterinary science [ 1532-2661 ] ; 2017.
Abstract
Thermal imaging technology has been identified as a potential method for non-invasive study of thermogenesis in the neonatal lamb. In comparison to measurement of the core body temperature, infrared thermography may observe thermal loss and thermogenesis linked to subcutaneous brown fat depots. This study aimed to identify a suitable method to measure heat loss in the neonatal lamb under a cold challenge. During late pregnancy (day 125), ewes were subjected to either shearing (n=15) or mock handling (sham-shorn for 2min mimicking the shearing movements) (n=15). Previous studies have shown an increase in brown adipose tissue deposition in lambs born to ewes shorn during pregnancy and we hypothesized that the shearing treatment would impact thermoregulatory capacities in newborn lambs. Lambs born to control ewes (n=14; CONTROL) and shorn ewes (n=13; SHORN) were subjected to a cold challenge of 1h duration at 4h after birth. During the cold challenge, thermography images were taken every 10min, from above, at a fixed distance from the dorsal midline. On each image, four fixed-size areas were identified (shoulder, mid loin, hips and rump) and the average and maximum temperatures of each recorded. In all lambs, body surface temperature decreased over time. Overall the SHORN lambs appeared to maintain body surface temperature better than CONTROL lambs, while CONTROL lambs appeared to have higher core temperature. At 30min post cold challenge SHORN lambs tended to have higher body surface temperatures than lambs (P=0.0474). Both average and maximum temperatures were highest at the hips. Average temperature was lowest at the shoulder (P<0.05), while maximum temperatures were lowest at both shoulder and rump (P<0.005). These results indicate that lambs born to shorn ewes maintained their radiated body surface temperature better than CONTROL lambs. In conjunction with core temperature changes under cold challenge, this insight will allow us to understand whether increased body surface temperature contributes to increased overall heat loss or whether increased body surface temperature is indeed a mechanism contributing to maintenance of core body temperature under cold challenge conditions. This study has confirmed the utility of infrared thermography images to capture and identify different levels of thermoregulatory capacity in newborn lambs.
DOI: 10.1016/j.rvsc.2017.09.023
PubMed: 28968573
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Labeur</name><affiliation wicri:level="1"><nlm:affiliation>CSIRO Agriculture and Food, FD McMaster Laboratory, Armidale, NSW 2350, Australia; School of Environmental and Rural Science, University of New England, Armidale, NSW 2351, Australia.</nlm:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>CSIRO Agriculture and Food, FD McMaster Laboratory, Armidale, NSW 2350, Australia; School of Environmental and Rural Science, University of New England, Armidale, NSW 2351</wicri:regionArea><wicri:noRegion>NSW 2351</wicri:noRegion></affiliation></author><author><name sortKey="Villiers, G" sort="Villiers, G" uniqKey="Villiers G" first="G" last="Villiers">G. Villiers</name><affiliation wicri:level="3"><nlm:affiliation>CSIRO Agriculture and Food, FD McMaster Laboratory, Armidale, NSW 2350, Australia; Agro-Paris Tech, 16 rue Claude Bernard, Cedex 5, Paris, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>CSIRO Agriculture and Food, FD McMaster Laboratory, Armidale, NSW 2350, Australia; Agro-Paris Tech, 16 rue Claude Bernard, Cedex 5, Paris</wicri:regionArea><placeName><region type="region">Île-de-France</region><region type="old region">Île-de-France</region><settlement type="city">Paris</settlement></placeName></affiliation></author><author><name sortKey="Small, A H" sort="Small, A H" uniqKey="Small A" first="A H" last="Small">A H Small</name><affiliation wicri:level="1"><nlm:affiliation>CSIRO Agriculture and Food, FD McMaster Laboratory, Armidale, NSW 2350, Australia.</nlm:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>CSIRO Agriculture and Food, FD McMaster Laboratory, Armidale, NSW 2350</wicri:regionArea><wicri:noRegion>NSW 2350</wicri:noRegion></affiliation></author><author><name sortKey="Hinch, G N" sort="Hinch, G N" uniqKey="Hinch G" first="G N" last="Hinch">G N Hinch</name><affiliation wicri:level="1"><nlm:affiliation>School of Environmental and Rural Science, University of New England, Armidale, NSW 2351, Australia.</nlm:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>School of Environmental and Rural Science, University of New England, Armidale, NSW 2351</wicri:regionArea><wicri:noRegion>NSW 2351</wicri:noRegion></affiliation></author><author><name sortKey="Schmoelzl, S" sort="Schmoelzl, S" uniqKey="Schmoelzl S" first="S" last="Schmoelzl">S. Schmoelzl</name><affiliation wicri:level="1"><nlm:affiliation>CSIRO Agriculture and Food, FD McMaster Laboratory, Armidale, NSW 2350, Australia; School of Environmental and Rural Science, University of New England, Armidale, NSW 2351, Australia. 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This study aimed to identify a suitable method to measure heat loss in the neonatal lamb under a cold challenge. During late pregnancy (day 125), ewes were subjected to either shearing (n=15) or mock handling (sham-shorn for 2min mimicking the shearing movements) (n=15). Previous studies have shown an increase in brown adipose tissue deposition in lambs born to ewes shorn during pregnancy and we hypothesized that the shearing treatment would impact thermoregulatory capacities in newborn lambs. Lambs born to control ewes (n=14; CONTROL) and shorn ewes (n=13; SHORN) were subjected to a cold challenge of 1h duration at 4h after birth. During the cold challenge, thermography images were taken every 10min, from above, at a fixed distance from the dorsal midline. On each image, four fixed-size areas were identified (shoulder, mid loin, hips and rump) and the average and maximum temperatures of each recorded. In all lambs, body surface temperature decreased over time. Overall the SHORN lambs appeared to maintain body surface temperature better than CONTROL lambs, while CONTROL lambs appeared to have higher core temperature. At 30min post cold challenge SHORN lambs tended to have higher body surface temperatures than lambs (P=0.0474). Both average and maximum temperatures were highest at the hips. Average temperature was lowest at the shoulder (P<0.05), while maximum temperatures were lowest at both shoulder and rump (P<0.005). These results indicate that lambs born to shorn ewes maintained their radiated body surface temperature better than CONTROL lambs. In conjunction with core temperature changes under cold challenge, this insight will allow us to understand whether increased body surface temperature contributes to increased overall heat loss or whether increased body surface temperature is indeed a mechanism contributing to maintenance of core body temperature under cold challenge conditions. This study has confirmed the utility of infrared thermography images to capture and identify different levels of thermoregulatory capacity in newborn lambs.</div></front></TEI><pubmed><MedlineCitation Status="In-Process" Owner="NLM"><PMID Version="1">28968573</PMID><DateCreated><Year>2017</Year><Month>10</Month><Day>02</Day></DateCreated><DateRevised><Year>2017</Year><Month>11</Month><Day>17</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1532-2661</ISSN><JournalIssue CitedMedium="Internet"><Volume>115</Volume><PubDate><Year>2017</Year><Month>Dec</Month></PubDate></JournalIssue><Title>Research in veterinary science</Title><ISOAbbreviation>Res. Vet. Sci.</ISOAbbreviation></Journal><ArticleTitle>Infrared thermal imaging as a method to evaluate heat loss in newborn lambs.</ArticleTitle><Pagination><MedlinePgn>517-522</MedlinePgn></Pagination><ELocationID EIdType="pii" ValidYN="Y">S0034-5288(17)30541-6</ELocationID><ELocationID EIdType="doi" ValidYN="Y">10.1016/j.rvsc.2017.09.023</ELocationID><Abstract><AbstractText>Thermal imaging technology has been identified as a potential method for non-invasive study of thermogenesis in the neonatal lamb. In comparison to measurement of the core body temperature, infrared thermography may observe thermal loss and thermogenesis linked to subcutaneous brown fat depots. This study aimed to identify a suitable method to measure heat loss in the neonatal lamb under a cold challenge. During late pregnancy (day 125), ewes were subjected to either shearing (n=15) or mock handling (sham-shorn for 2min mimicking the shearing movements) (n=15). Previous studies have shown an increase in brown adipose tissue deposition in lambs born to ewes shorn during pregnancy and we hypothesized that the shearing treatment would impact thermoregulatory capacities in newborn lambs. Lambs born to control ewes (n=14; CONTROL) and shorn ewes (n=13; SHORN) were subjected to a cold challenge of 1h duration at 4h after birth. During the cold challenge, thermography images were taken every 10min, from above, at a fixed distance from the dorsal midline. On each image, four fixed-size areas were identified (shoulder, mid loin, hips and rump) and the average and maximum temperatures of each recorded. In all lambs, body surface temperature decreased over time. Overall the SHORN lambs appeared to maintain body surface temperature better than CONTROL lambs, while CONTROL lambs appeared to have higher core temperature. At 30min post cold challenge SHORN lambs tended to have higher body surface temperatures than lambs (P=0.0474). Both average and maximum temperatures were highest at the hips. Average temperature was lowest at the shoulder (P<0.05), while maximum temperatures were lowest at both shoulder and rump (P<0.005). These results indicate that lambs born to shorn ewes maintained their radiated body surface temperature better than CONTROL lambs. In conjunction with core temperature changes under cold challenge, this insight will allow us to understand whether increased body surface temperature contributes to increased overall heat loss or whether increased body surface temperature is indeed a mechanism contributing to maintenance of core body temperature under cold challenge conditions. This study has confirmed the utility of infrared thermography images to capture and identify different levels of thermoregulatory capacity in newborn lambs.</AbstractText><CopyrightInformation>Copyright © 2017 Elsevier Ltd. All rights reserved.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Labeur</LastName><ForeName>L</ForeName><Initials>L</Initials><AffiliationInfo><Affiliation>CSIRO Agriculture and Food, FD McMaster Laboratory, Armidale, NSW 2350, Australia; School of Environmental and Rural Science, University of New England, Armidale, NSW 2351, Australia.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Villiers</LastName><ForeName>G</ForeName><Initials>G</Initials><AffiliationInfo><Affiliation>CSIRO Agriculture and Food, FD McMaster Laboratory, Armidale, NSW 2350, Australia; Agro-Paris Tech, 16 rue Claude Bernard, Cedex 5, Paris, France.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Small</LastName><ForeName>A H</ForeName><Initials>AH</Initials><AffiliationInfo><Affiliation>CSIRO Agriculture and Food, FD McMaster Laboratory, Armidale, NSW 2350, Australia.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Hinch</LastName><ForeName>G N</ForeName><Initials>GN</Initials><AffiliationInfo><Affiliation>School of Environmental and Rural Science, University of New England, Armidale, NSW 2351, Australia.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Schmoelzl</LastName><ForeName>S</ForeName><Initials>S</Initials><AffiliationInfo><Affiliation>CSIRO Agriculture and Food, FD McMaster Laboratory, Armidale, NSW 2350, Australia; School of Environmental and Rural Science, University of New England, Armidale, NSW 2351, Australia. Electronic address: sabine.schmoelzl@csiro.au.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2017</Year><Month>09</Month><Day>27</Day></ArticleDate></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>Res Vet Sci</MedlineTA><NlmUniqueID>0401300</NlmUniqueID><ISSNLinking>0034-5288</ISSNLinking></MedlineJournalInfo><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">Brown fat</Keyword><Keyword MajorTopicYN="N">Cold challenge</Keyword><Keyword MajorTopicYN="N">Neonate</Keyword><Keyword MajorTopicYN="N">Sheep</Keyword><Keyword MajorTopicYN="N">Thermogenesis</Keyword><Keyword MajorTopicYN="N">Thermoregulation</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2017</Year><Month>05</Month><Day>16</Day></PubMedPubDate><PubMedPubDate PubStatus="revised"><Year>2017</Year><Month>09</Month><Day>18</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2017</Year><Month>09</Month><Day>24</Day></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2017</Year><Month>10</Month><Day>3</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2017</Year><Month>10</Month><Day>3</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2017</Year><Month>10</Month><Day>3</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">28968573</ArticleId><ArticleId IdType="pii">S0034-5288(17)30541-6</ArticleId><ArticleId IdType="doi">10.1016/j.rvsc.2017.09.023</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>Australie</li><li>France</li></country><region><li>Île-de-France</li></region><settlement><li>Paris</li></settlement></list><tree><country name="Australie"><noRegion><name sortKey="Labeur, L" sort="Labeur, L" uniqKey="Labeur L" first="L" last="Labeur">L. Labeur</name></noRegion><name sortKey="Hinch, G N" sort="Hinch, G N" uniqKey="Hinch G" first="G N" last="Hinch">G N Hinch</name><name sortKey="Schmoelzl, S" sort="Schmoelzl, S" uniqKey="Schmoelzl S" first="S" last="Schmoelzl">S. Schmoelzl</name><name sortKey="Small, A H" sort="Small, A H" uniqKey="Small A" first="A H" last="Small">A H Small</name></country><country name="France"><region name="Île-de-France"><name sortKey="Villiers, G" sort="Villiers, G" uniqKey="Villiers G" first="G" last="Villiers">G. Villiers</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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