RESUMO
OBJETIVO: Relacionar la anemia materna con el peso al nacer (PAN) en mujeres con embarazos a término atendidas en la emergencia obstétrica de la Maternidad "Dr. Armando Castillo Plaza", Maracaibo, Venezuela. MÉTODOS: Investigación correlacional con diseño no experimental y transeccional, donde se evaluaron 200 embarazadas en fase activa del trabajo de parto, a quienes se les determinaron los valores de hemoglobina (Hb), hematocrito (Hcto) e índices hematimétricos, para luego correlacionarlas con el PAN. RESULTADOS: Los valores de Hb oscilaban entre 8,4 ± 1,0 g/dl y 11,6 ± 0,64 g/dl, mientras que los de Hcto fueron de 28,8 ± 3,3% y 38,9 ± 2,2%, anémicas y no anémicas, respectivamente. Los índices hematimétricos mostraron valores referenciales normales en ambos grupos. El PAN de los recién nacidos de madres anémicas estaba disminuido en 12,39% (-420 g) al compararse con los pesos de los neonatos de madre sin anemia (2.970 ± 0,43 g vs. 3.390 ± 0,32 g; p<0,0001). El BPN fue más frecuente en el grupo de madres anémicas, las cuales mostraron un mayor riesgo, aunque no significativo (15% vs. 10%; OR IC95% 1,558 [0,676-3,728]; p>0,05). Se demostró una relación directamente proporcional y significativa entre los valores de Hb - PAN (r=0,439; p<0,0001). CONCLUSIÓN: Existe una relación directa, proporcional y significativa entre el PAN y los valores de Hb; sin embargo, aunque las gestantes anémicas presentaron con mayor frecuencia BPN, esta diferencia no fue significativa.
AIM: To link maternal anemia and birth weight (BW) in women with term pregnancies present to emergency obstetric at the Maternity "Dr. Armando Castillo Plaza", in Maracaibo, Venezuela. METHODS: A correlational research, with non-experimental and transactional design, where valued a sample of 200 pregnant women in active phase of labor, who are determined hemoglobin (Hb), hematocrit (Hct), and hematimetric indexes values. RESULTS: The values of Hb and Hct in anemic ranged from 8.4 ± 1 g/dl and 11.6 ± 0.64 g/dl, whereas the Hct was 28.8 ± 3.3% and 38.9 ± 2.2%, in patients with and without anemia, respectively. The hematimetric indexes showed normal reference values in both groups. The BW in newborn of anemic mothers was decreased by 12.39% (-420 g) when compared to the weights of infants of mother without anemia (2.970 ± 0.43 g vs. 3.390 ± 0.32 g; p<0.0001). LBW was more common in the group of anemic mothers, who showed an increased risk, although not significant (15% vs. 10%; OR 95%CI 1.588 [0,676-3,728]; p>0.05). Was demonstrated a directly proportional and significant relationship between Hb values and BW(r=0.439; p<0.0001). CONCLUSION: Exist a direct proportional and significant relationship between the PAN and the Hb; however, while anemic pregnant women presented more frequently LBW, this difference was not significant.
Assuntos
Humanos , Feminino , Gravidez , Recém-Nascido , Adulto , Adulto Jovem , Peso ao Nascer , Nascimento a Termo , Anemia , Fatores SocioeconômicosRESUMO
The alpha thalassaemia diseases in most cases are caused by deletions that affect one or two of the alpha genes, being less frequent the cases due to punctual mutations, insertions or deletions of a few pairs of bases, which have been denominated no deletion a thalassaemias. The objective of this investigation was to determine the incidence of the no deletion alpha thalassaemia in patients with a thalassaemia using molecular biology techniques. We studied 517 individuals of the San Carlos Hospital (Thalassemia Molecular Research Center, Madrid-Spain) between January 2001 and December 2003, in whom iron deficiency anemia had been ruled out, that presented microcytosis and hypochromia and that presented normal HbA2, HbF and EEF from normal Hbs. The two types of no deletion a thalassaemia most frequently described in the Mediterranean were studied: 1) alpha Hph due to deletion of 5bp in the IVS I and 2) alphaNco due to a change in the initiation codon of the gene. Of the 517 cases studied, 40 (7.7% of the cases) represented a no deletion alpha thalassaemia. Of these cases, 28 were positive for alphaHph of the alpha2 gene, 24 in the heterozygote state, one homozygote and three double heterozygotes associated with the 3,7 kb deletion. The remaining 12 cases were positive for the alphaNco of the alpha2 gene, 10 heterozygotes, one homozygote and one double heterozygote associated with the 4,2 kb deletion. The no deletion alpha thalassaemias represent < 8% from the cases in our environment. The alphaHph is the most frequent type of no deletion a thalassaemia and its haematological abnormalities are more manifest that the ones present in the cases of alphaNco.
Assuntos
Talassemia alfa/sangue , Talassemia alfa/genética , Deleção Cromossômica , Humanos , EspanhaRESUMO
Las a talasemias en la mayoría de los casos es debida a deleciones que afectan a uno o a los dos genes a, siendo poco frecuente los casos debidos a mutaciones puntuales, inserciones o deleciones de pocos pares de bases, los cuales se han denominado a talasemias no deleción. Se determinó la incidencia de la a talasemia no deleción en los pacientes con a talasemia, mediante biología molecular. Se estudiaron 517 individuos remitidos al Hospital Clínico San Carlos, centro de referencia de estudios moleculares de Talasemias en Madrid- España, entre Enero del 2001 a Diciembre del 2003, en los que se había descartado ferropenia y presentaban microcitosis, hipocromía, Hb A2, Hb F y EEF de Hbs normales. Se estudiaron los 2 tipos de a talasemia no deleción más descritas en el Mediterráneo: 1) aHph debida a la deleción de 5 bp en el IVS I y 2) aNco a un cambio en el codón de iniciación del gen. De los 517, 40 presentaban una a talasemia no deleción (7,7%). De éstos, 28 fueron positivos para aHph del gen a2, 24 en estado heterocigoto, 1 homocigoto y 3 dobles heterocigotos asociados con la deleción 3,7 kb. Los 12 restantes resultaron positivos para la aNco del gen a2, 10 heterocigotos, 1 homocigoto y 1 doble heterocigoto asociado con la deleción 4,2 kb. La a talasemia no deleción representa < 8% de los casos de a talasemia en nuestro medio. La aHph es el tipo de a talasemia no deleción más frecuente y cuyas anormalidades hematológicas son más manifiestas que las presentadas en los casos de aNco.
The a thalassaemia diseases in most cases are caused by deletions that affect one or two of the a genes, being less frequent the cases due to punctual mutations, insertions or deletions of a few pairs of bases, which have been denominated no deletion a thalassaemias. The objective of this investigation was to determine the incidence of the no deletion a thalassaemia in patients with a thalassaemia using molecular biology techniques. We studied 517 individuals of the San Carlos Hospital (Thalassemia Molecular Research Center, Madrid-Spain) between January 2001 and December 2003, in whom iron deficiency anemia had been ruled out, that presented microcytosis and hypochromia and that presented normal HbA2, HbF and EEF from normal Hbs. The two types of no deletion a thalassaemia most frequently described in the Mediterranean were studied: 1) a Hph due to deletion of 5bp in the IVS I and 2) aNco due to a change in the initiation codon of the gene. Of the 517 cases studied, 40 (7.7% of the cases) represented a no deletion a thalassaemia. Of these cases, 28 were positive for aHph of the a2 gene, 24 in the heterozygote state, one homozygote and three double heterozygotes associated with the 3,7 kb deletion. The remaining 12 cases were positive for the aNco of the a2 gene, 10 heterozygotes, one homozygote and one double heterozygote associated with the 4,2 kb deletion. The no deletion a thalassaemias represent < 8% from the cases in our environment. The aHph is the most frequent type of no deletion a thalassaemia and its haematological abnormalities are more manifest that the ones present in the cases of aNco.
Assuntos
Humanos , Talassemia alfa/sangue , Talassemia alfa/genética , Deleção Cromossômica , EspanhaRESUMO
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