[Assessment of relationship between Doppler flows in pregnancies after 41 week and the incidence of cesarean sections with induced labour].

AIM

The aim of the study was to assess a relationship between the Doppler flows in foetal vessels, i.e. the middle cerebral artery (MCA), umbilical artery (UMA), umbilical vein (UV) and ductus venosus (DV) as well as in maternal vessels, i.e. the right uterine artery (UAR), left uterine artery (UAL) and the incidence of cesarean sections in pregnancies after 41 week with induced labour.

MATERIALS AND METHODS

The study included 130 pregnant women, including 100 pregnant women, between 41 and 42 weeks of gestation, in whom induced labour resulted in a cesarean section due to three main indications: lack of progress of labour (Group I-44), signs of foetal distress (Group II-32) and lack of response to induced labour (Group III-24). The control group (Group IV) included 30 pregnant women between 41 and 42 completed weeks of gestation, in whom induction resulted in a physiological labour. Vascular flow was analysed in vessels, foetal, i.e. MCA, UMA, UV, DV and maternal, i.e. UAR, UAL. The procedures were conducted with the use of Medison SA 9900 vaginal and abdominal probes.

RESULTS

There are observed statistically significant differences between the studied and control groups with regards to values of the variables: PSV MCA (58.64 +/-13.72 vs. 52.73 +/-10.9 p<0,05), S/D UMA (2.61 +/-1.16 vs. 2.06 +/-0.45 p<0,05), PI UMA (0.84 +/-0.23 vs. 0.7 +/-0.19 p<0,05), RI UMA (0.58 +/-0.13 vs. 0.5 +/-0.11 p<0,05). In Group II values of pulsatility index (PI) both uterine arteries are statistically significant higher (0,83 +/-0,29) than in other groups (I: 0,6 +/-0,19 p<0,05, III: . 0,61 +/-0,15 p<0,05, IV 0,64 +/-0,17 p<0,05).

CONCLUSIONS

Assessment of Doppler flows in pregnancies after 41 week might allow to select pregnant women who are at a greater risk of terminating pregnancy with cesarean section after induction of labour.