McCarthy J M, Capullari T, Thompson Z, Zhu Y, Spellacy W N
Department of Obstetrics and Gynecology of the University of South Florida College of Medicine, Tampa, FL 33606, USA.
J Perinatol. 2006 Feb;26(2):89-92. doi: 10.1038/sj.jp.7211437.
To determine the umbilical cord blood nucleated red blood cell (UC-nRBC) count in uncomplicated pregnancies delivered by elective cesarean section or delivered vaginally.
A total of 57-term singleton pregnancies were studied: 33 with elective cesarean sections and 24 with vaginal deliveries. UC-nRBC was analyzed for its nucleated red blood cell counts. A logarithmic transformation of the data was used for statistical analysis.
The mean+/-standard deviation (s.d.) for nucleated red blood cell per 100 white blood cells (nRBC/100WBC) from the elective cesarean section group was 7.8+/-7.4. The vaginal delivery group had a mean value of 9.3+/-10.5, which was not significantly different. A value of 22 nRBC/100WBC defined the upper 95% confidence limit. The correlation between absolute nRBC and nRBC/100 WBC was 0.97.
Although chronic hypoxia is associated with elevated nRBC, the stress of uncomplicated labor does not change the level. This adds credence to its use as a marker for hypoxia preceding labor and delivery.
确定择期剖宫产或经阴道分娩的无并发症妊娠的脐带血有核红细胞（UC-nRBC）计数。
共研究了57例足月单胎妊娠：33例行择期剖宫产，24例经阴道分娩。分析UC-nRBC的有核红细胞计数。对数据进行对数转换以进行统计分析。
择期剖宫产组每100个白细胞中核红细胞（nRBC/100WBC）的平均±标准差为7.8±7.4。阴道分娩组的平均值为9.3±10.5，差异无统计学意义。22 nRBC/100WBC的值定义了95%的置信上限。绝对nRBC与nRBC/100 WBC之间的相关性为0.97。
虽然慢性缺氧与nRBC升高有关，但无并发症分娩的应激并不会改变其水平。这为其作为分娩前缺氧标志物的应用增添了可信度。
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