Abstract
Uterine activity measured by quantifying active contraction area in induced labour showed an initial significant steep increase (incremental phase) followed by a stable phase when the uterine activity was about 1750 k Pas/15 min in nulliparae and multi‐parae with poor cervical score; it was 1500 k Pas/15 min in multiparae with good cervical score. Once this was achieved, further increase in oxytocin dosage did not increase uterine activity but instead revealed a tendency to hypertonic uterine contractions. A marked rise in uterine activity was observed in the late first stage of labour (terminal phase) despite no increase in oxytocin in patients with good cervical scores (>6) at induction but not in those with poor cervical scores (<5). The uterine activity in the stable phase of oxytocin‐induced labour was not significantly influenced by parity and cervical score except multiparae with a cervical score of six or more who had significantly less uterine activity compared to multiparae with poor cervical score or nulliparae.
Original language | English |
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Pages (from-to) | 533-540 |
Number of pages | 8 |
Journal | Asia‐Oceania Journal of Obstetrics and Gynaecology |
Volume | 12 |
Issue number | 4 |
DOIs | |
Publication status | Published - 1986 |
Keywords
- active contraction area
- incremental phase
- induction
- oxytocin
- stable phase