Assessment of fetal lung maturity using analysis of amniotic fluid from ewes that gave birth prematurely and at term

Detalhes bibliográficos
Autor(a) principal: Souza,Natália Cristina de
Data de Publicação: 2020
Outros Autores: Bovino,Fernanda, Avilla,Larissa Gabriella, Deschk,Maurício, Alcindo,Jefferson F., Fink,Maria Fernanda C.B., Mendes,Luiz Cláudio N., Feitosa,Francisco Leydson F.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Pesquisa Veterinária Brasileira (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-736X2020001201039
Resumo: Abstract: The aim of this study was to evaluate the lung maturity of premature and full-term lambs by analyzing amniotic fluid using the following methods: Clements test, Nile blue cytology test, hematoxylin-Shorr stain, lamellar body count, and radiographic tests. The use of these methods is intended to identify high-risk newborns and provide immediate clinical intervention after birth. Altogether, 56 animals (24 ewes and 32 lambs) were included in the study and divided into 3 groups. Group I consisted of 8 ewes that were at approximately 145 days of gestation; this group delivered 10 lambs naturally. Group II consisted of 8 ewes that were at 138 days’ gestation; this group delivered 11 lambs by cesarean section. Group III consisted of 8 ewes at 138 days’ gestation; this group was administered intramuscular dexamethasone (16mg/animal) 36 hours prior to a cesarean section. Group III delivered11 lambs. Cytological tests were performed using a microscope with a maximum magnification of 1000x, while the Clements test was visually observed by one of the researchers. Amnioticfluid lamellar body counts were measured using transmission electron microscopy. Among the staining methods, hematoxylin-Shorr was reliable, and Group III had a greater number of orangeophilic cells when compared to Group II, probably due to corticoid administration. The Clements test showed pulmonary maturity in approximately 20% of Group I lambs and Group II showed 9.1% of bubbles; however, Group III had the highest pulmonary maturity percentage (36.4%). The lamellar bodies were measured, and all groups had sizes between 0.019 and 0.590μm. Radiographic evaluation revealed that the majority of lambs presented some level of pulmonary radiodensity, indicating an acinar pattern at birth. These results are in line with the expectations of each group. We found that the normal group showed greater pulmonary maturity, whereas Group II presented pulmonary immaturity, which is expected because this group comprised lambs born prematurely and Group III showed pulmonary maturity almost comparable to the normal delivery group (Group I). This is due to the fact that although these animals are premature, the use of dexamethasone helped in pulmonary maturation. Therefore, these pulmonary maturity tests are considered effective when more than one technique is used and can be used routinely in the care of a pregnant ewe in labor, where a simple collection of amniotic fluid can predict a high-risk pregnancy and alert the veterinarian if the newborn needs intensive supportive treatment.
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spelling Assessment of fetal lung maturity using analysis of amniotic fluid from ewes that gave birth prematurely and at termFetuslungamniotic fluidewessheeplung fetal maturitylamb survivalovineAbstract: The aim of this study was to evaluate the lung maturity of premature and full-term lambs by analyzing amniotic fluid using the following methods: Clements test, Nile blue cytology test, hematoxylin-Shorr stain, lamellar body count, and radiographic tests. The use of these methods is intended to identify high-risk newborns and provide immediate clinical intervention after birth. Altogether, 56 animals (24 ewes and 32 lambs) were included in the study and divided into 3 groups. Group I consisted of 8 ewes that were at approximately 145 days of gestation; this group delivered 10 lambs naturally. Group II consisted of 8 ewes that were at 138 days’ gestation; this group delivered 11 lambs by cesarean section. Group III consisted of 8 ewes at 138 days’ gestation; this group was administered intramuscular dexamethasone (16mg/animal) 36 hours prior to a cesarean section. Group III delivered11 lambs. Cytological tests were performed using a microscope with a maximum magnification of 1000x, while the Clements test was visually observed by one of the researchers. Amnioticfluid lamellar body counts were measured using transmission electron microscopy. Among the staining methods, hematoxylin-Shorr was reliable, and Group III had a greater number of orangeophilic cells when compared to Group II, probably due to corticoid administration. The Clements test showed pulmonary maturity in approximately 20% of Group I lambs and Group II showed 9.1% of bubbles; however, Group III had the highest pulmonary maturity percentage (36.4%). The lamellar bodies were measured, and all groups had sizes between 0.019 and 0.590μm. Radiographic evaluation revealed that the majority of lambs presented some level of pulmonary radiodensity, indicating an acinar pattern at birth. These results are in line with the expectations of each group. We found that the normal group showed greater pulmonary maturity, whereas Group II presented pulmonary immaturity, which is expected because this group comprised lambs born prematurely and Group III showed pulmonary maturity almost comparable to the normal delivery group (Group I). This is due to the fact that although these animals are premature, the use of dexamethasone helped in pulmonary maturation. Therefore, these pulmonary maturity tests are considered effective when more than one technique is used and can be used routinely in the care of a pregnant ewe in labor, where a simple collection of amniotic fluid can predict a high-risk pregnancy and alert the veterinarian if the newborn needs intensive supportive treatment.Colégio Brasileiro de Patologia Animal - CBPA2020-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-736X2020001201039Pesquisa Veterinária Brasileira v.40 n.12 2020reponame:Pesquisa Veterinária Brasileira (Online)instname:Colégio Brasileiro de Patologia Animal (CBPA)instacron:EMBRAPA10.1590/1678-5150-pvb-6544info:eu-repo/semantics/openAccessSouza,Natália Cristina deBovino,FernandaAvilla,Larissa GabriellaDeschk,MaurícioAlcindo,Jefferson F.Fink,Maria Fernanda C.B.Mendes,Luiz Cláudio N.Feitosa,Francisco Leydson F.eng2021-03-10T00:00:00Zoai:scielo:S0100-736X2020001201039Revistahttp://www.pvb.com.br/https://old.scielo.br/oai/scielo-oai.phpcolegio@cbpa.org.br||pvb@pvb.com.br0100-736X1678-5150opendoar:2021-03-10T00:00Pesquisa Veterinária Brasileira (Online) - Colégio Brasileiro de Patologia Animal (CBPA)false
dc.title.none.fl_str_mv Assessment of fetal lung maturity using analysis of amniotic fluid from ewes that gave birth prematurely and at term
title Assessment of fetal lung maturity using analysis of amniotic fluid from ewes that gave birth prematurely and at term
spellingShingle Assessment of fetal lung maturity using analysis of amniotic fluid from ewes that gave birth prematurely and at term
Souza,Natália Cristina de
Fetus
lung
amniotic fluid
ewes
sheep
lung fetal maturity
lamb survival
ovine
title_short Assessment of fetal lung maturity using analysis of amniotic fluid from ewes that gave birth prematurely and at term
title_full Assessment of fetal lung maturity using analysis of amniotic fluid from ewes that gave birth prematurely and at term
title_fullStr Assessment of fetal lung maturity using analysis of amniotic fluid from ewes that gave birth prematurely and at term
title_full_unstemmed Assessment of fetal lung maturity using analysis of amniotic fluid from ewes that gave birth prematurely and at term
title_sort Assessment of fetal lung maturity using analysis of amniotic fluid from ewes that gave birth prematurely and at term
author Souza,Natália Cristina de
author_facet Souza,Natália Cristina de
Bovino,Fernanda
Avilla,Larissa Gabriella
Deschk,Maurício
Alcindo,Jefferson F.
Fink,Maria Fernanda C.B.
Mendes,Luiz Cláudio N.
Feitosa,Francisco Leydson F.
author_role author
author2 Bovino,Fernanda
Avilla,Larissa Gabriella
Deschk,Maurício
Alcindo,Jefferson F.
Fink,Maria Fernanda C.B.
Mendes,Luiz Cláudio N.
Feitosa,Francisco Leydson F.
author2_role author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Souza,Natália Cristina de
Bovino,Fernanda
Avilla,Larissa Gabriella
Deschk,Maurício
Alcindo,Jefferson F.
Fink,Maria Fernanda C.B.
Mendes,Luiz Cláudio N.
Feitosa,Francisco Leydson F.
dc.subject.por.fl_str_mv Fetus
lung
amniotic fluid
ewes
sheep
lung fetal maturity
lamb survival
ovine
topic Fetus
lung
amniotic fluid
ewes
sheep
lung fetal maturity
lamb survival
ovine
description Abstract: The aim of this study was to evaluate the lung maturity of premature and full-term lambs by analyzing amniotic fluid using the following methods: Clements test, Nile blue cytology test, hematoxylin-Shorr stain, lamellar body count, and radiographic tests. The use of these methods is intended to identify high-risk newborns and provide immediate clinical intervention after birth. Altogether, 56 animals (24 ewes and 32 lambs) were included in the study and divided into 3 groups. Group I consisted of 8 ewes that were at approximately 145 days of gestation; this group delivered 10 lambs naturally. Group II consisted of 8 ewes that were at 138 days’ gestation; this group delivered 11 lambs by cesarean section. Group III consisted of 8 ewes at 138 days’ gestation; this group was administered intramuscular dexamethasone (16mg/animal) 36 hours prior to a cesarean section. Group III delivered11 lambs. Cytological tests were performed using a microscope with a maximum magnification of 1000x, while the Clements test was visually observed by one of the researchers. Amnioticfluid lamellar body counts were measured using transmission electron microscopy. Among the staining methods, hematoxylin-Shorr was reliable, and Group III had a greater number of orangeophilic cells when compared to Group II, probably due to corticoid administration. The Clements test showed pulmonary maturity in approximately 20% of Group I lambs and Group II showed 9.1% of bubbles; however, Group III had the highest pulmonary maturity percentage (36.4%). The lamellar bodies were measured, and all groups had sizes between 0.019 and 0.590μm. Radiographic evaluation revealed that the majority of lambs presented some level of pulmonary radiodensity, indicating an acinar pattern at birth. These results are in line with the expectations of each group. We found that the normal group showed greater pulmonary maturity, whereas Group II presented pulmonary immaturity, which is expected because this group comprised lambs born prematurely and Group III showed pulmonary maturity almost comparable to the normal delivery group (Group I). This is due to the fact that although these animals are premature, the use of dexamethasone helped in pulmonary maturation. Therefore, these pulmonary maturity tests are considered effective when more than one technique is used and can be used routinely in the care of a pregnant ewe in labor, where a simple collection of amniotic fluid can predict a high-risk pregnancy and alert the veterinarian if the newborn needs intensive supportive treatment.
publishDate 2020
dc.date.none.fl_str_mv 2020-12-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-736X2020001201039
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-736X2020001201039
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/1678-5150-pvb-6544
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Colégio Brasileiro de Patologia Animal - CBPA
publisher.none.fl_str_mv Colégio Brasileiro de Patologia Animal - CBPA
dc.source.none.fl_str_mv Pesquisa Veterinária Brasileira v.40 n.12 2020
reponame:Pesquisa Veterinária Brasileira (Online)
instname:Colégio Brasileiro de Patologia Animal (CBPA)
instacron:EMBRAPA
instname_str Colégio Brasileiro de Patologia Animal (CBPA)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Pesquisa Veterinária Brasileira (Online)
collection Pesquisa Veterinária Brasileira (Online)
repository.name.fl_str_mv Pesquisa Veterinária Brasileira (Online) - Colégio Brasileiro de Patologia Animal (CBPA)
repository.mail.fl_str_mv colegio@cbpa.org.br||pvb@pvb.com.br
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