Reference ranges of rotational thromboelastometry parameters in pregnant women and puerperas: a single-center randomized trial: 612.115.2

Abstract

Summary. Background: Recently, integral tests for hemostasis assessment in pregnant women as well as during obstetric surgery associated with bleeding have become popular. In our country, there are no studies of population norms for rotational thromboelastometry (ROTEM) in pregnant women, parturients and puerperants. Objectives: to identify reference intervals limits for ROTEM parameters during physiological pregnancy and in early postpartum period and to carry out correlation analysis with standard coagulogram parameters. Patients/Methods: We examined 229 women in Krasnoyarsk region; they were divided into 5 groups: nonpregnant (control), pregnant women in II and III trimesters, women in early postpartum period after cesarean section and after vaginal delivery. All women were comparable in age, body mass index, and concomitant pathology. Reference intervals were calculated either as the mean and standard deviation (for normal distribution), or as the median and 2.5 and 97.5% percentiles (for abnormal distribution). Results: The study confirmed hemostasis hypercoagulation changes during pregnancy and in early postpartum period. ROTEM parameters in women in III trimester of pregnancy and in early postpartum period differ significantly from those in non-pregnant women. Differences between ROTEM parameters in puerperants, regardless of the delivery method, not found. The correlation between ROTEM parameters and traditional laboratory coagulation tests revealed a relationship between clot density amplitude in FIBTEM test and Klaus fibrinogen level. Conclusions: Reference intervals of ROTEM parameters in women of Krasnoyarsk region are presented. A correlation was found between ROTEM parameters and fibrinogen level.

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