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Calculating probability of requiring allogeneic blood transfusion using three preoperative risk factors on cesarean section for placenta previa

  • Maternal-Fetal Medicine
  • Published:
Archives of Gynecology and Obstetrics Aims and scope Submit manuscript

Abstract

Purpose

To construct a model to calculating probability of requiring allogeneic blood transfusion on cesarean section (CS) for placenta previa (PP).

Methods

A retrospective cohort study involving all 205 patients with PP who underwent CS in our institute. We determined the relationship between allogeneic blood transfusion and nine preoperative factors: (1) maternal age, (2) parity, (3) uterine myoma, (4) previous CS, (5) the placenta covering the previous CS scar (referred to as “scar covering”), (6) degree of previa, (7) ultrasound finding of lacunae, (8) preoperative anemia, and (9) preparation of autologous blood. Independent risk factors of allogeneic blood transfusion were identified by multivariate logistic regression analysis. These significant factors were included in the final model, and, the probability of allogeneic blood transfusion was calculated.

Results

Independent risk factors of allogeneic blood transfusion were scar covering, previous CS without scar covering, and lacunae. These three factors were used to create a predictive model. The model revealed that patients with scar covering and lacunae had the highest probability (0.73), while those with no risk factors had the lowest probability (0.02).

Conclusion

This simple model may be useful to calculate probability of requiring allogeneic blood transfusion on CS for placenta previa.

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Fig. 1

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Abbreviations

BT:

Blood transfusion

CS:

Cesarean section

FFP:

Fresh frozen plasma

IQR:

Interquartile range

OR:

Odds ratio

PC:

Platelet concentrate

PP:

Placenta previa

RCC:

Red cell concentrate

ROC:

Receiver operating characteristic

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Conflict of interest

The authors declare that we have no conflicts of interest regarding this article.

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Authors and Affiliations

  1. Department of Obstetrics and Gynecology, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke, Tochigi, 329-0498, Japan

    Yosuke Baba, Akihide Ohkuchi, Rie Usui, Hirotada Suzuki, Tomoyuki Kuwata & Shigeki Matsubara

Authors
  1. Yosuke Baba
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  2. Akihide Ohkuchi
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  3. Rie Usui
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  4. Hirotada Suzuki
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  5. Tomoyuki Kuwata
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  6. Shigeki Matsubara
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Corresponding author

Correspondence to Shigeki Matsubara.

Additional information

Y. Baba and A. Ohkuchi equally contributed to this study.

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Baba, Y., Ohkuchi, A., Usui, R. et al. Calculating probability of requiring allogeneic blood transfusion using three preoperative risk factors on cesarean section for placenta previa. Arch Gynecol Obstet 291, 281–285 (2015). https://doi.org/10.1007/s00404-014-3451-x

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  • DOI: https://doi.org/10.1007/s00404-014-3451-x

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