Various linear and non-linear signal-processing techniques were applied to three-channel uterine EMG records to separate term and pre-term deliveries. The linear techniques were root mean square value, peak and median frequency of the signal power spectrum and autocorrelation zero crossing; while the selected non-linear techniques were estimation of the maximal Lyapunov exponent, correlation dimension and calculating sample entropy. In total, 300 records were grouped into four groups according to the time of recording (before or after the 26th week of gestation) and according to the total length of gestation (term delivery records--pregnancy duration >or=37 weeks and pre-term delivery records--pregnancy duration <37 weeks). The following preprocessing band-pass Butterworth filters were tested: 0.08-4, 0.3-4, and 0.3-3 Hz. With the 0.3-3 Hz filter, the median frequency indicated a statistical difference between those term and pre-term delivery records recorded before the 26th week (p = 0.03), and between all term and all pre-term delivery records (p = 0.012). With the same filter, the sample entropy indicated statistical differences between those term and pre-term delivery records recorded before the 26th week (p = 0.035), and between all term and all pre-term delivery records (p = 0.011). Both techniques also showed noticeable differences between term delivery records recorded before and after the 26th week (p
Knowledge of adverse fetal outcome leads to more pessimistic CTG evaluation and management recommendations.
The aim of this study was to evaluate the electromyographic (EMG) activity of the uterus concerning the placental implantation site. In a clinical trial, 55 pregnant women in the last trimester of pregnancy were enrolled. They were divided into two major groups: 25 women had placental implantation site on the anterior and 30 women on the posterior uterine wall. With regard to the presence/nonpresence of contractions, each group was further divided into two subgroups. Uterine EMG activity was recorded by electrodes placed on the abdominal wall. All signals were transferred through a series of amplifiers. Amplified and filtered EMG signals were digitized and written on a hard disk, simultaneously with the signals of external tocodynamometry. From the 30-min EMG recording, we calculated the average root mean square (RMS) and the average median frequency (MF) of the signal. A significant difference of the abdominal EMG activity concerning the placental implantation site was found only in pregnant women with contractions. The RMS was significantly lower in the placental implantation site on the anterior uterine wall, whereas the MF was significantly higher. It can be concluded that the placental implantation site influences the uterine EMG activity registered through the abdominal wall, especially when registered above the placental implantation site.
of recommendations 1. Episiotomy should be performed by indication only, and not routinely (Moderate quality evidence +++-; Strong recommendation). Accepted indications for episiotomy are to shorten the second stage of labour when there is suspected fetal hypoxia (Low quality evidence ++--; Weak recommendation); to prevent obstetric anal sphincter injury in vaginal operative deliveries, or when obstetric sphincter injury occurred in previous deliveries (Moderate quality evidence +++-; Strong recommendation) 2. Mediolateral or lateral episiotomy technique should be used (Moderate quality evidence +++-; Strong recommendation). Labour ward staff should be offered regular training in correct episiotomy techniques (Moderate quality evidence +++-; Strong recommendation).3. Pain relief needs to be considered before episiotomy is performed, and epidural analgesia may be insufficient. The perineal skin needs to be tested for pain before an episiotomy is performed, even when an epidural is in place. Local anesthetics or pudendal block need to be considered as isolated or additional pain relief methods (Low quality evidence ++--; Strong recommendation).4. After childbirth the perineum should be carefully inspected, and the anal sphincter palpated to identify possible injury (Moderate quality evidence +++-; Strong recommendation). Primary suturing immediately after childbirth should be offered and a continuous suturing technique should be used when repairing an uncomplicated episiotomy (High quality evidence ++++; Strong recommendation)
Decembra 2019 se je v Wuhanu na Kitajskem pojavil novi sev koronavirusa SARS-CoV-2, ki povzroča bolezen covid-19. Ta se kaže s simptomi in znaki prizadetosti zgornjih dihal: s kašljem, dispnejo, povišano telesno temperaturo, prisotne pa so lahko bolečine v mišicah, prebavne težave, izguba vonja in okusa. Znanje, pridobljeno na podlagi izbruhov ostalih človeških koronavirusov (angl. Severe Acute Respiratory Syndrome Coronavirus - SARS-CoV in Middle East Respiratory Syndrome Coronavirus - MERS-CoV), uvršča nosečnice in njihove plodove v ranljivo skupino, vendar pa trenutno velja, da nosečnice niso bolj ogrožene za težak potek bolezni covid-19. Po razglasitvi pandemije so sledili ostri ukrepi, katerih cilj je bil omejiti širjenje virusa. Zato se je življenje na vseh področjih korenito spremenilo. Tudi delovanje bolnišnic se je moralo prilagoditi na obstoječe razmere. V Porodnišnici Ljubljana smo se po razglasitvi pandemije covida-19 zavedali, da bo treba za optimalno oskrbo vseh nosečnic oblikovati smernice oz. kliničnih poti za vse zaposlene. Zaradi narave dela obsega dejavnosti ni bilo mogoče bistveno zmanjšati, zato smo se na sprejem morebitno ali potrjeno okuženih nosečnic morali pripraviti v izjemno kratkem času. Porodnišnico smo razdelili na tri območja po zgledu urgentnega bloka Univerzitetnega kliničnega centra Ljubljana: belo območje za zdrave nosečnice, sivo območje za nosečnice, pri katerih smo sumili na okužbo s SARS-CoV-2, vendar ta še ni bila potrjena, in rdeče območje, kjer smo obravnavali dokazano pozitivne nosečnice. Do konca maja 2020 sta v Ljubljanski porodnišnici rodili dve porodnici z dokazano okužbo z virusom SARS-CoV-2 in tri porodnice po preboleli okužbi z virusom SARS-CoV-2. Nobena od njih ni imela hujših simptomov bolezni covid-19, zato tudi intenzivno zdravljenje ni bilo potrebno.
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