Proteína S libre en embarazadas normales: comparación entre dos métodos

Background: Pregnancy is a physiological hypercoagulable state with an increased incidence of thromboembolic phenomena. There is an increase in the concentrations of most clotting factors, a decrease in concentration of some of the natural anticoagulants and reduced fibrinolytic activity. Changes in...

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Autores principales:	Fardella B,Patricia, Parra C,Mauro, Conte L,Guillermo, Flores P,Claudio, Muñoz S,Hernán, Soto S,Lilian, Cuneo V,Marianela, Mallea P,Carmen, Retamales M,María Beatriz, Peña R,Sofía, Ojeda H,Constanza
Lenguaje:	Spanish / Castilian
Publicado:	Sociedad Médica de Santiago 2005
Materias:	Pregnancy trimesters Protein S Protein S deficiency
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0034-98872005000600002
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spelling	oai:scielo:S0034-988720050006000022005-08-26Proteína S libre en embarazadas normales: comparación entre dos métodosFardella B,PatriciaParra C,MauroConte L,GuillermoFlores P,ClaudioMuñoz S,HernánSoto S,LilianCuneo V,MarianelaMallea P,CarmenRetamales M,María BeatrizPeña R,SofíaOjeda H,Constanza Pregnancy trimesters Protein S Protein S deficiency Background: Pregnancy is a physiological hypercoagulable state with an increased incidence of thromboembolic phenomena. There is an increase in the concentrations of most clotting factors, a decrease in concentration of some of the natural anticoagulants and reduced fibrinolytic activity. Changes in PS levels have also been reported. Aim: To establish referral range values of functional PS and free PS antigen, during the second (2nd T) and third trimester (3rd T) of normal gestation. Patients and methods: Forty one normal pregnant women were included in our study, 20 during the 2nd T (22-24 weeks) and 21 during the 3rd T (29-38 weeks). Functional PS was measured by a clot based test and free PS antigen by ELISA. Results: Free PS Antigen was 65.8±18.3% during the 2nd T and 62.3±16.5% during the 3rd T. The figures for normal controls were 106±6.5%. Functional PS was 43.8±13.3 and 25.9±14.6% during the 2nd T and 3rd T, respectively. The figures for normal controls were 97±24% (p <0.001 compared with pregnant women). Free PS antigen did not change from the 2nd to the 3rd T (p=NS), however functional PS fell significantly from the 2nd to the 3rd T (p <0.001) and was significantly lower than free PS antigen in both trimesters (p <0.001). Conclusions: Pregnancy is associated to a decrease in PS. This abnormality is more pronounced for functional PS than free PS antigen and functional PS falls progressively during pregnancy. These assays should not be used to screen for PS deficiency during pregnancy because they could lead to a misdiagnosisinfo:eu-repo/semantics/openAccessSociedad Médica de SantiagoRevista médica de Chile v.133 n.6 20052005-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0034-98872005000600002es10.4067/S0034-98872005000600002
institution	Scielo Chile
collection	Scielo Chile
language	Spanish / Castilian
topic	Pregnancy trimesters Protein S Protein S deficiency
spellingShingle	Pregnancy trimesters Protein S Protein S deficiency Fardella B,Patricia Parra C,Mauro Conte L,Guillermo Flores P,Claudio Muñoz S,Hernán Soto S,Lilian Cuneo V,Marianela Mallea P,Carmen Retamales M,María Beatriz Peña R,Sofía Ojeda H,Constanza Proteína S libre en embarazadas normales: comparación entre dos métodos
description	Background: Pregnancy is a physiological hypercoagulable state with an increased incidence of thromboembolic phenomena. There is an increase in the concentrations of most clotting factors, a decrease in concentration of some of the natural anticoagulants and reduced fibrinolytic activity. Changes in PS levels have also been reported. Aim: To establish referral range values of functional PS and free PS antigen, during the second (2nd T) and third trimester (3rd T) of normal gestation. Patients and methods: Forty one normal pregnant women were included in our study, 20 during the 2nd T (22-24 weeks) and 21 during the 3rd T (29-38 weeks). Functional PS was measured by a clot based test and free PS antigen by ELISA. Results: Free PS Antigen was 65.8±18.3% during the 2nd T and 62.3±16.5% during the 3rd T. The figures for normal controls were 106±6.5%. Functional PS was 43.8±13.3 and 25.9±14.6% during the 2nd T and 3rd T, respectively. The figures for normal controls were 97±24% (p <0.001 compared with pregnant women). Free PS antigen did not change from the 2nd to the 3rd T (p=NS), however functional PS fell significantly from the 2nd to the 3rd T (p <0.001) and was significantly lower than free PS antigen in both trimesters (p <0.001). Conclusions: Pregnancy is associated to a decrease in PS. This abnormality is more pronounced for functional PS than free PS antigen and functional PS falls progressively during pregnancy. These assays should not be used to screen for PS deficiency during pregnancy because they could lead to a misdiagnosis
author	Fardella B,Patricia Parra C,Mauro Conte L,Guillermo Flores P,Claudio Muñoz S,Hernán Soto S,Lilian Cuneo V,Marianela Mallea P,Carmen Retamales M,María Beatriz Peña R,Sofía Ojeda H,Constanza
author_facet	Fardella B,Patricia Parra C,Mauro Conte L,Guillermo Flores P,Claudio Muñoz S,Hernán Soto S,Lilian Cuneo V,Marianela Mallea P,Carmen Retamales M,María Beatriz Peña R,Sofía Ojeda H,Constanza
author_sort	Fardella B,Patricia
title	Proteína S libre en embarazadas normales: comparación entre dos métodos
title_short	Proteína S libre en embarazadas normales: comparación entre dos métodos
title_full	Proteína S libre en embarazadas normales: comparación entre dos métodos
title_fullStr	Proteína S libre en embarazadas normales: comparación entre dos métodos
title_full_unstemmed	Proteína S libre en embarazadas normales: comparación entre dos métodos
title_sort	proteína s libre en embarazadas normales: comparación entre dos métodos
publisher	Sociedad Médica de Santiago
publishDate	2005
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0034-98872005000600002
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Proteína S libre en embarazadas normales: comparación entre dos métodos

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