Abstract
Summary. Uterine activity was studied in 40 nulliparous Chinese women who were in normal labour and had a normal delivery. A catheter‐tip pressure transducer coupled with a uterine activity integrator was used to observe and quantify uterine activity. Normal labour progress was defined as labour progressing within 2 h to the right of a line drawn at 1 cm/h in the active phase. A wide range of uterine activity was recorded with varying degrees of co‐ordination. The minimum level of uterine activity likely to be associated with labour progress was 650 kPas/15 min at 3 cm cervical dilatation. The median level in the active phase of normal labour was 1440 kPas/15 min. There was a strong correlation between measurements in kPas/15 min and Montevideo units/15 min (r= 0.71, P0.001). No significant increase was found in basal tone.
Original language | English |
---|---|
Pages (from-to) | 220-227 |
Number of pages | 8 |
Journal | BJOG: An International Journal of Obstetrics & Gynaecology |
Volume | 91 |
Issue number | 3 |
DOIs | |
Publication status | Published - 1984 |