Objective:To investigate the phenotype distribution of five antigens of Rh blood group system and the specificity of Rh blood group irregular antibodies in pregnant women with second child.To analyze the relationship ...Objective:To investigate the phenotype distribution of five antigens of Rh blood group system and the specificity of Rh blood group irregular antibodies in pregnant women with second child.To analyze the relationship between Rh blood group antibody and hemolytic disease of the newborn(HDN)in second-child pregnant women,and to provide laboratory basis for the diagnosis and treatment of hemolytic disease of the newborn(Rh-HDN).Methods:500 pregnant women with second child were collected as the study group and 500 pregnant women with first pregnancy as the control group(all pregnant women underwent obstetric examination in the integrated obsteric clinic of our hospital from January 2020 to January 2021).To detectethe Rh blood group antigens(D,C,c,E,e)of the two groups of samples,screene the irregular antibodies,identify the specificity of irregular antibodies,determine the titer and record the hemolytic disease of the newborn of pregnant women with positive Rh blood group antibodies.Results:There were 11 Rh phenotypes in the pregnant women with second child in the study group:CCDee(152cases,30.4%),CcDEe(136cases,27.2%)CcDee(84cases,16.8%),ccDEE(30cases,6%),ccDee(31cases,6.2%),CCDEe(14cases,2.8%),ccDEe(9cases,1.8%),cc dee(18cases,3.6%),CCDEE(2cases,0.4%),CcdEe(12cases,2.4%),Ccdee(6cases,1.2%),CCd ee(6cases,1.2%).A total of 42 cases(8.4%)in the pregnant women with second child were negative for RhD.There were 10 Rh phenotypes in the pregnant women with first pregnancy in the control group:CCDee(144cases,28.8%),CcDEe(138cases,27.6%),CcDee(90cases,18%),ccDEE(42cases,8.4%),ccDee(28cases,5.6%),CCDEe(10cases,2%),ccDEe(8cases,1.6%),cc dee(19cases,3.8%),CCDEE(1cases,0.2%),CcdEe(11cases,2.2%),Ccdee(9cases,1.8%).A total of 39 cases(7.8%)in the pregnant women with first pregnancy were negative for RhD.In the pregnant women with second child in the study group,the positive rate of irregular antibody screening was 4.0%(20/500),and the specificity of Rh blood group antibodies was found as follows:anti-E 1.8%(9/500),anti-D 1.4%(7/500),anti-C 0.4%(2/500)and anti-Ec 0.4%(2/500).The positive rate of irregular antibody screening in the pregnant women with first pregnancy in the control group was 0,and the difference between the two groups was statistically significant(P<0.05).Rh-HDN was found in 10 newborns(2%)of the 20 women with positive irregular antibodies in the pregnant women with second child,and the antibody titer during pregnancy was more than 32.No Rh-HDN occurred in newborns in the pregnant women with first pregnancy,and the difference between the two groups was statistically significant(P<0.05).Conclusion:Pregnancy stimulation can increase the probability of irregular antibodies in pregnant women,and irregular antibodies in Rh blood group can easily cause Rh-HDN,so attention should be paid to routine detection of five antigens of Rh blood group and irregular antibody screening during prenatal examination.It is helpful for the early detection of Rh-blood irregular antibodies and the assessment of fetal or neonatal risk of Rh-HDN.展开更多
This case is of Rh -ve 2nd gravida having antibody titre detected 1:2 at 8 weeks of 2nd pregnancy. Serial antibody titre carried out along with clinical examination. Fetal monitoring was done by assessing MCA-PSV (Mid...This case is of Rh -ve 2nd gravida having antibody titre detected 1:2 at 8 weeks of 2nd pregnancy. Serial antibody titre carried out along with clinical examination. Fetal monitoring was done by assessing MCA-PSV (Middle cerebral artery peak systolic velocity) and CTG (Cardiotocograph) when required. Pregnancy was terminated when the titre reached 1:512 at 34 wks of pregnancy with abnormal MCA-PSV values. Neonate just had begun to show sign of anaemia & haemolysis at birth.展开更多
目的 探讨孕妇抗M抗体漏检致新生儿溶血病(hemolytic disease of the newborn,HDN)的原因及策略。方法选取2021年1—12月首都医科大学附属北京友谊医院就诊的孕妇5例。采用全自动血型仪微柱凝集法检测孕妇血型并筛查不规则抗体、采用盐...目的 探讨孕妇抗M抗体漏检致新生儿溶血病(hemolytic disease of the newborn,HDN)的原因及策略。方法选取2021年1—12月首都医科大学附属北京友谊医院就诊的孕妇5例。采用全自动血型仪微柱凝集法检测孕妇血型并筛查不规则抗体、采用盐水试管法检测MN抗原,采用微柱凝集法检测新生儿溶血三项。分析产妇血型、抗体筛查、鉴定补做试验和新生儿溶血试验等结果。结果 5例孕妇产前不规则抗体筛查阴性,复查产妇4℃不规则抗体筛查为阳性,经抗体鉴定为抗M抗体;新生儿溶血三项试验4℃微柱凝集法试验阳性。结论 传统微柱凝集抗人球蛋白法可导致孕妇冷反应抗M抗体漏检。建议孕妇增加盐水法检测不规则抗体,避免冷反应抗M抗体漏检致HDN。展开更多
基金Youth Fund Program of Hainan Provincial Natural Science Fundation of China(No.820QN410)。
文摘Objective:To investigate the phenotype distribution of five antigens of Rh blood group system and the specificity of Rh blood group irregular antibodies in pregnant women with second child.To analyze the relationship between Rh blood group antibody and hemolytic disease of the newborn(HDN)in second-child pregnant women,and to provide laboratory basis for the diagnosis and treatment of hemolytic disease of the newborn(Rh-HDN).Methods:500 pregnant women with second child were collected as the study group and 500 pregnant women with first pregnancy as the control group(all pregnant women underwent obstetric examination in the integrated obsteric clinic of our hospital from January 2020 to January 2021).To detectethe Rh blood group antigens(D,C,c,E,e)of the two groups of samples,screene the irregular antibodies,identify the specificity of irregular antibodies,determine the titer and record the hemolytic disease of the newborn of pregnant women with positive Rh blood group antibodies.Results:There were 11 Rh phenotypes in the pregnant women with second child in the study group:CCDee(152cases,30.4%),CcDEe(136cases,27.2%)CcDee(84cases,16.8%),ccDEE(30cases,6%),ccDee(31cases,6.2%),CCDEe(14cases,2.8%),ccDEe(9cases,1.8%),cc dee(18cases,3.6%),CCDEE(2cases,0.4%),CcdEe(12cases,2.4%),Ccdee(6cases,1.2%),CCd ee(6cases,1.2%).A total of 42 cases(8.4%)in the pregnant women with second child were negative for RhD.There were 10 Rh phenotypes in the pregnant women with first pregnancy in the control group:CCDee(144cases,28.8%),CcDEe(138cases,27.6%),CcDee(90cases,18%),ccDEE(42cases,8.4%),ccDee(28cases,5.6%),CCDEe(10cases,2%),ccDEe(8cases,1.6%),cc dee(19cases,3.8%),CCDEE(1cases,0.2%),CcdEe(11cases,2.2%),Ccdee(9cases,1.8%).A total of 39 cases(7.8%)in the pregnant women with first pregnancy were negative for RhD.In the pregnant women with second child in the study group,the positive rate of irregular antibody screening was 4.0%(20/500),and the specificity of Rh blood group antibodies was found as follows:anti-E 1.8%(9/500),anti-D 1.4%(7/500),anti-C 0.4%(2/500)and anti-Ec 0.4%(2/500).The positive rate of irregular antibody screening in the pregnant women with first pregnancy in the control group was 0,and the difference between the two groups was statistically significant(P<0.05).Rh-HDN was found in 10 newborns(2%)of the 20 women with positive irregular antibodies in the pregnant women with second child,and the antibody titer during pregnancy was more than 32.No Rh-HDN occurred in newborns in the pregnant women with first pregnancy,and the difference between the two groups was statistically significant(P<0.05).Conclusion:Pregnancy stimulation can increase the probability of irregular antibodies in pregnant women,and irregular antibodies in Rh blood group can easily cause Rh-HDN,so attention should be paid to routine detection of five antigens of Rh blood group and irregular antibody screening during prenatal examination.It is helpful for the early detection of Rh-blood irregular antibodies and the assessment of fetal or neonatal risk of Rh-HDN.
文摘This case is of Rh -ve 2nd gravida having antibody titre detected 1:2 at 8 weeks of 2nd pregnancy. Serial antibody titre carried out along with clinical examination. Fetal monitoring was done by assessing MCA-PSV (Middle cerebral artery peak systolic velocity) and CTG (Cardiotocograph) when required. Pregnancy was terminated when the titre reached 1:512 at 34 wks of pregnancy with abnormal MCA-PSV values. Neonate just had begun to show sign of anaemia & haemolysis at birth.
文摘目的 探讨孕妇抗M抗体漏检致新生儿溶血病(hemolytic disease of the newborn,HDN)的原因及策略。方法选取2021年1—12月首都医科大学附属北京友谊医院就诊的孕妇5例。采用全自动血型仪微柱凝集法检测孕妇血型并筛查不规则抗体、采用盐水试管法检测MN抗原,采用微柱凝集法检测新生儿溶血三项。分析产妇血型、抗体筛查、鉴定补做试验和新生儿溶血试验等结果。结果 5例孕妇产前不规则抗体筛查阴性,复查产妇4℃不规则抗体筛查为阳性,经抗体鉴定为抗M抗体;新生儿溶血三项试验4℃微柱凝集法试验阳性。结论 传统微柱凝集抗人球蛋白法可导致孕妇冷反应抗M抗体漏检。建议孕妇增加盐水法检测不规则抗体,避免冷反应抗M抗体漏检致HDN。
