Labor contractions usually will begin mildly and sporadically. They may even feel like a boring back ache or menstrual cramps. However, these contractions will increase in power, frequency, and period as your labor progresses. If a pregnancy of between 14 and 18 weeks’ maturity is to be terminated by the intra-amniotic injection of hypertonic saline, the following procedure is due to this fact recommended. Having emptied the bladder the patient is flippantly sedated with diazepam and put in the lithotomy place. With aseptic and antiseptic precautions, the cervix is grasped with a tenaculum and the ball-ended guide of a paracervical block needle or an Iowa trumpet inserted by way of the cervix and used to penetrate the amniotic sac. The needle itself is only inserted if the sac cannot be penetrated with the guide alone, the position of the uterus being verified bimanually first.
A sliding window, with a width equal to 800 acquisition factors (i.e. four s), scanned the 12 bipolar EHG signals with a 400-point increment. At each position of this window, 36 H2 values have been calculated from the 36 laterally adjacent pairs of bipolar indicators (for instance between Vb1 and Vb4, between Vb4 and Vb7, between …
