Author/Editor		Pušenjak, S
Title		Elektromiografija uterusa v latentni in v aktivni fazi poroda
Type		monografija
Place		Ljubljana
Publisher		Medicinska fakulteta
Publication year		1993
Volume		str. 66
Language		slo
Abstract		Methods: The method of detection, developed by our team, which provides recording the electric activity of the uterus from the surface of the abdomen in women in labour. We recorded the EMG activity of the fundus uteri during the first stage of labour by two pairs of skin electrodes placed at right angle above the fundal and isrhmic region of the uterus. One flexible, plastic catheter was introduced into the amniotic cavity in order to transmit the intrauterine pressure during labour. All recorded activities were ON-LINE converted into digital values and copied on a hard disc of the PC. The fetus was monitored with direct electronic cardiotocography. Results: - Contrary to our expectations the EMG activity of the fundus uteri is not greater than that of the isthmus and it changes in a nonspecific way during the first stage of labour. In contrast to this fmding the EMG activity of the isthmic region increases progressively during labour. -The uterine activity, electric as well as mechanic, increases progressively during labour and is significantly higher in the active compared to the latent phase of the first stage of labour. - We found the uterine contractions to be related to the elevated EMG activity, so the method applied for EMG detection in the trial seems to be adequate. - The intensity of contractions does not correlate with the intensity of the EMG activity. - The intensity of the uterine EMG activity in the isthmic region is significantly higher in the transverse than in the longitudinal direction, but both are strongly conelated. It is suggested therefore that both electrode leads detect same action potentials propagated at an angle of approx. 55 +/- 9 degrees in relation to the longitudinal axis of the uterus. Both EMG activities, the transverse and the longitudinal, in the form of Root-mean-square values, were used for the calculation of the propagation angle, which shows very small shifts between the latent and active phase of labour.(trunc.)
Descriptors		UTERINE CONTRACTION ELECTROMYOGRAPHY MANOMETRY LABOR, INDUCED LABOR STAGE, FIRST LABOR STAGE, SECOND CERVIX UTERI