The journal of maternal-fetal & neonatal medicine : the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians · 2015
The effect of labor and delivery on white blood cell count.
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Arbib Nissim, Aviram Amir, Gabbay Ben-Ziv Rinat, Sneh Orly, Yogev Yariv, Hadar Eran
Аннотация
OBJECTIVE: To explore post-partum white blood cell (WBC) count, and possible factors affecting it.
STUDY DESIGN: Retrospective cohort analysis of 12 079 healthy women, delivering a singleton term fetus with an uncomplicated course of labor, delivery and puerperium. All women delivered in a single tertiary, university-affiliated medical center from 2009 to 2014. Student's t-test, Mann-Whitney's U-test, χ(2) test and ANOVA were used to compare between variables. Multiple variable analyses was performed to allow adjustment for potential covariates and confounders. The main outcome measures included post-partum WBC count and the difference in the post-partum versus ante-partum WBC count, in association to mode of delivery, type of analgesia, timing of cesarean delivery and perineal trauma.
RESULTS: The mean post-partum WBC count was 13.39 ± .24 × 10(9)/L (range 1.20-37.30 × 10(9)/L). There is a significant increase in the WBC after delivery (2.1 9 ± 3.33 × 10(9)/L) with significant differences according to mode of delivery (2.34 ± 3.48, 3.32 ± 3.69 and 1.6 0 ± 2.87 × 10(9)/L for spontaneous, assisted and cesarean deliveries. Multiple variables can affect post-partum leukocytosis, including: age, parity, gestational age, mode of delivery, type of anesthesia, timing of cesarean delivery in relation to labor onset and the extent of perineal trauma.
CONCLUSIONS: Post-partum leukocytosis is a physiological phenomenon with a wide normal variation and multiple contributing factors. As a single parameter, post-partum leukocytosis should not prompt further work up.
STUDY DESIGN: Retrospective cohort analysis of 12 079 healthy women, delivering a singleton term fetus with an uncomplicated course of labor, delivery and puerperium. All women delivered in a single tertiary, university-affiliated medical center from 2009 to 2014. Student's t-test, Mann-Whitney's U-test, χ(2) test and ANOVA were used to compare between variables. Multiple variable analyses was performed to allow adjustment for potential covariates and confounders. The main outcome measures included post-partum WBC count and the difference in the post-partum versus ante-partum WBC count, in association to mode of delivery, type of analgesia, timing of cesarean delivery and perineal trauma.
RESULTS: The mean post-partum WBC count was 13.39 ± .24 × 10(9)/L (range 1.20-37.30 × 10(9)/L). There is a significant increase in the WBC after delivery (2.1 9 ± 3.33 × 10(9)/L) with significant differences according to mode of delivery (2.34 ± 3.48, 3.32 ± 3.69 and 1.6 0 ± 2.87 × 10(9)/L for spontaneous, assisted and cesarean deliveries. Multiple variables can affect post-partum leukocytosis, including: age, parity, gestational age, mode of delivery, type of anesthesia, timing of cesarean delivery in relation to labor onset and the extent of perineal trauma.
CONCLUSIONS: Post-partum leukocytosis is a physiological phenomenon with a wide normal variation and multiple contributing factors. As a single parameter, post-partum leukocytosis should not prompt further work up.