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Results 601 - 650 of 1287
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di Renzo G C - - 1996
In this report we describe how the technique of "deterministic chaos" can be successfully applied to the study of fetal cardiotocography (CTG). The CTG tracings were analysed, after identification as "normal" or "pathological" by experts and by a computerised system, to evaluate the correlation dimension (D2), and the graphic analysis ...
Blondel B - - 1996
OBJECTIVE: To compare the opinions of obstetricians who currently use fetal heart rate monitoring (FHRM) by telephone with the opinions of obstetricians in favour of this technique, but who do not use it. STUDY DESIGN: A mail questionnaire was sent to the 612 members of a professional organization of obstetricians. ...
Assad R S - - 1995
BACKGROUND: Sustained tachyarrhythmia resulting in fetal hydrops is often refractory to medical therapy. Fetal atrioventricular node ablation associated with epicardial fetal pacing has the potential to be an effective procedure for this morbid association. METHODS: To assess the feasibility of therapeutic fetal heart block, we developed a technique of intrauterine ...
Cusick W - - 1995
Fetal heart rate monitoring, uterine contraction monitoring, and amnioinfusion are procedures used commonly during labor that have also improved our understanding of intrapartum physiology, although there are limitations to the ability of these procedures to improve pregnancy outcome. The current status of intrapartum fetal heart rate monitoring, uterine contraction monitoring, ...
Romanini C - - 1995
Fetal intrauterine behaviour is not a stable situation but a continuous alternation of states characterized by significant changes in fetal motility, heart rate, hemodynamics, metabolism and response to stimulation. Associations between fetal heart rate patterns and movements occur from 26-28 weeks of gestation onwards. As fetuses grow older these variables ...
Poehlmann S - - 1995
OBJECTIVE: To evaluate the effect of labor analgesia with nalbuphine hydrochloride on the fetal response to vibroacoustic stimulation. STUDY DESIGN: The response to fetal acoustic stimulation (FAS) was recorded in 27 laboring patients before analgesia. After analgesia with 5 mg nalbuphine hydrochloride administered subcutaneously, the response to FAS was again ...
Genevier E S - - 1995
Fetal scalp ECG and Doppler ultrasound are the two methods universally used to derive the fetal heart rate (FHR) for cardiotocography. Other fetal signal sources have not been used successfully because of the complexity of the signal and the need for an additional maternal ECG input. In this paper, we ...
- - 1995
Because alterations in fetal oxygenation occur during labor and because many complications can occur during this critical period, some form of FHR evaluation should be provided for all patients. The choice of technique is based on various factors, including the resources available. Nonreassuring FHR patterns are common and quite nonspecific. ...
van Gelder-Hasker M R - - 1995
BACKGROUND: Fetal supraventricular tachycardia is most often treated by maternal application of digoxin. A drug used for second-choice therapy is flecainide acetate. CASE: For a case in which maternal digoxin therapy failed, flecainide caused a lowering of the fetal heart rate (FHR) but, simultaneously, variability and accelerations nearly disappeared. The ...
Larson J D - - 1995
OBJECTIVE: Our purpose was to compare fetal heart rate patterns and uterine activity before and after preinduction prostaglandin E2 administration in the presence or absence of oligohydramnios. STUDY DESIGN: In a retrospective case-controlled review we examined cases in which prostaglandin E2 (Prepidil) was inserted intracervically for gravid women requiring an ...
Edemeka D B - - 1995
Data from standard electrocardiographic recording in 41 pregnant Southern Nigerian women and in 39 non-pregnant controls of similar ages are given. The results show a mean of 12 degrees axis deviation between the pregnant and non-pregnant subjects, with mean values of 44 +/- 23.00 degrees and 56 +/- 11.00 degrees ...
Giannina G - - 1995
OBJECTIVE: To examine the effects of meperidine and nalbuphine on intrapartum fetal heart rate (FHR) tracings using computer analysis. METHODS: We studied 28 women with uncomplicated pregnancies in early labor at term with reactive FHR tracings. The women were randomized to receive either meperidine 50 mg or nalbuphine 10 mg ...
Ville Y - - 1995
The effects of corticosteroids, given for enhancement of fetal lung maturation, on fetal heart rate (FHR) are controversial and may decrease its variability. FHR patterns were analyzed by computerized cardiotocography in 46 fetuses from 23 normal dichorionic twin pregnancies on days 0, 1 and 4-7 while the mothers received four ...
Hsu K F - - 1995
A 22-year-old woman was referred to our hospital because of severe anemia in the 20th week of gestation. Acute myelogenous leukemia was diagnosed and she was treated with multiple-agent chemotherapy in the second and third trimesters. Although the patient tolerated the intensive treatment, an intermittent sinusoidal fetal heart rate pattern ...
Burnett A F - - 1995
Nine members of the Western Australian Cricket Association fast bowling development squad were selected to determine the effects that a 12-over spell would have on fast bowling technique and selected physiological variables. Three high-speed cameras operating at 100 Hz filmed the subjects bowling the 5th and 6th balls of their ...
Crowe J A - - 1995
It is well established that fetal and maternal electrocardiograms (ECGs) can be obtained from the maternal abdomen using standard surface electrodes, although this cannot be guaranteed. The unobtrusive and non-invasive nature of such monitoring lends itself naturally to the long-term ambulatory collection of this data on cardiac activity. By employing ...
Groves P A - - 1995
It is essential for an obstetric anesthesiologist to be aware of the fetal status before undertaking care of the laboring mother. In the last 20 years electronic fetal monitoring has been the most widely used technique of evaluating the fetus in labor. Recently however, the ability to predict or improve ...
Coenen A M - - 1995
This paper records the effects of carbon dioxide when used for euthanasia, on behaviour, electrical brain activity and heart rate in rats. Four different methods were used. Animals were placed in a box (a) that was completely filled with carbon dioxide; (b) into which carbon dioxide was streamed at a ...
Sibony O - - 1995
Spectral analysis of fetal heart rate variability allows quantitative determination of the main components that affect this variability. The physiological significance of these components is unclear; however, movements appear to contribute to variability. We studied six fetuses in which immobility required for in utero magnetic resonance or invasive fetal procedures ...
Chung T K - - 1995
OBJECTIVE: To assess the capability of a computer software interpretation program, using intrapartum fetal heart rate and intrauterine pressure as recorded in a cardiotocogram to predict fetal acidosis at birth. DESIGN AND SUBJECTS: A retrospective analysis of digitised fetal heart rate and uterine activity values obtained from 73 high risk ...
Tanaka M - - 1995
A 23-year-old pregnant woman presented with severe hypothermia (33.8 degrees C) as a complication of treatment for urosepsis. The baseline fetal heart rate was 100 beats/min. Despite evidence of variability, a 'sinusoid-like' pattern was observed. However, the fetal heart rate gradually returned to normal after rewarming the patient. This suggests ...
Kramer D C - - 1995
Two term-pregnant women presented in the obstetric unit with marked diaphoresis and tremulousness. Fetal heart rate monitoring revealed severe bradycardia. Both mothers had blood glucose levels consistent with the diagnosis of hypoglycemia. In both cases the fetal heart rate normalized with improvement in the mothers' glycemic state. The presence of ...
Sibony O - - 1995
Flat heart rate recordings may be observed in different fetal states such as chronic distress and sleep. Their visual analysis do not allow the distinction between these two states. We used spectral analysis to study the heart rate patterns in 25 fetuses. Two significant (P < 5 x 10(-5)) groups ...
Ingamells S - - 1995
Most liveborn babies with gastroschisis do well after surgical repair, although about one-eighth of affected cases die late in utero. Our practice is to use weekly computerised cardiotocograph (CTG) analysis after week 34 of gestation in cases of gastroschisis. In a look-back at the records in 18 such singleton pregnancies, ...
Buyon J P - - 1995
To determine the feasibility and effectiveness of prenatal therapy of congenital heart block (CHB), information was sought regarding the timing of identification of CHB in 72 pregnancies and the outcome of those pregnancies in which the mothers were administered corticosteroids. Mailed questionnaires with telephone follow-up, data from primary physicians and ...
Smith C V - - 1995
Vibroacoustic stimulation of the human fetus profoundly alters fetal behavior and heart rate. Many authors have reported success using this technique to improve the efficiency of antepartum fetal heart rate testing without changing the predictive reliability of the tests. Vibroacoustic stimulation has other potential advantages in the antepartum assessment of ...
Mathai M - - 1995
A longitudinal study was carried out on 38 women with low risk pregnancies. These women had cardiotocography at 27-28 wk initially, at fortnightly intervals thereafter until 36 wk and at weekly intervals thereafter until delivery. All cardiotocographs were analyzed by one investigator who was not aware of the individual clinical ...
Catanzarite V A - - 1995
The sinusoidal fetal heart rate pattern has been described in association with severe fetal anaemia, with fetal hypoxaemia, and with the administration of parenteral narcotics. Here, we report a case of decreased fetal movement in which a sinusoidal tracing was recorded. The sonographic diagnosis of a massive fetal intracranial haemorrhage ...
Bartnicki J - - 1995
OBJECTIVE: The purpose of this study was to examine the effect of vibroacoustic stimulation during low fetal heart rate (FHR) variability. METHODS: FHR was analyzed 30 min before and 30 min after computerized vibroacoustic stimulation using the Oxford Sonicaid system 8000. The study comprised 32 healthy pregnant women with low ...
Fonseca E - - 1995
OBJECTIVE: To investigate the relationship of creatine phosphokinase and its isoenzymes with fetal asphyxia and risk at birth. METHODS: Thirty-five pregnant women with high-risk pregnancy were studied. RESULTS: In 21 patients, fetal distress was diagnosed by interpretation of the fetal heart rate tracing (FHR). The remaining 14 women, having normal ...
Ranta P - - 1995
BACKGROUND: Two hundred and forty-eight consecutive deliveries with a 0.25% bupivacaine paracervical block (PCB) using a superficial injection technique were studied prospectively during the progress of labor in the three month study period. Parturients with signs of fetal distress were excluded. Pain level and the maternal, fetal and neonatal effects ...
Reubinoff B E - - 1995
Objective of the paper was to determine the fetal heart rate (FHR) changes that occur in preterm fetuses whose mothers have suffered antepartum bleeding, versus uncomplicated controls. Over a 12-year span, 91 patients with significant antenatal bleeding (bleeding requiring inhospital observation) were examined and compared to 75 controls with uncomplicated ...
Alonso-Betanzos A - - 1995
The system described, VISC, has as its aim the acquisition and subsequent digitization of monodimensional cardiotocographic signals. These signals can originate in any type of hospital cardiotocographic register, as well as in a book of uterine activity (UA) or fetal heart rate (FHR) signals. VISC consists of a set of ...
Smith C V - - 1994
VAS of the human fetus produces a profound alteration of fetal behavior and FHR. Many authors have reported on the success of the technique in improving the efficiency of antepartum FHR testing without altering the predictive reliability of the tests. VAS has other potential advantages in the antepartum assessment of ...
Budin N - - 1994
A real-time multichannel fetal ECG monitor based on a personal computer (PC) and a MOTOROLA DSP56001 Digital Signal CoProcessor (DSP) is introduced. The DSP board is plugged into the PC, which functions as a HOST computer. An analog 8 Leads Interface and Analog to Digital circuits module is connected to ...
Symonds E M - - 1994
Seventy per cent of all claims concerning intrapartum care in relation to fetal brain damage are based on abnormalities of the cardiotocograms and electronic fetal monitoring. Claims arise because of failure to take action in the presence of an abnormal cardiotocogram, or because of delayed response to an abnormal tracing. ...
Jonker F H - - 1994
A transabdominal Doppler technique for the recording of fetal heart rate (FHR) was investigated in the bovine fetus. During the last 2 weeks of gestation recordings were made once or twice per week in eight cows by placing a 1.5 MHz Doppler transducer on the right ventral abdominal wall. Continuous ...
Quinn A - - 1994
OBJECTIVE: To establish the reliability of fetal magnetocardiography as a method of measuring the time intervals of the fetal heart during the antenatal period. DESIGN: A prospective study. SETTING: Wellcome Biomagnetism Unit, Southern General Hospital. SUBJECTS: One hundred and six low risk pregnant women at 20 to 42 weeks gestation. ...
Weiner Z - - 1994
OBJECTIVE: Our purpose was to evaluate whether computerized analysis of fetal heart rate variation may improve fetal surveillance in postterm pregnancy. STUDY DESIGN: Three hundred thirty-seven pregnant women who were delivered after 41 weeks' gestation and who had 610 antenatal tests were included in this study. Fetal tests included a ...
Koyanagi T - - 1994
Analysis of FHR variability attempts to be able to distinguish which FHR changes are physiological and which are pathological. From the results of such studies, it is hoped that clinicians will be provided with the means to identify accurately which fetuses are healthy, which are at risk and which are ...
Oppenheimer L W - - 1994
This chapter examines the role of power spectral analysis (PSA) in elucidation of the physiological control mechanisms of fetal heart rate and as a potential indicator of fetal well-being. The importance of fetal heart rate variability (FHRV) as an indicator of fetal oxygenation is discussed, and the limitations in the ...
Yamakoshi Y - - 1994
Foetal heart rate (FHR) in the early stage of pregnancy can be optimally estimated by a simple system combining a conventional pulsed Doppler device with a microcomputer (CPU). The input signals for FHR have been obtained as low frequency components of foetal Doppler signals. These components are less than 50 ...
Schifrin B S - - 1994
There have been too many surrogates used to define fetal asphyxia and too many surrogates used to time fetal injury. Low Apgar scores and the need for prolonged resuscitation, by themselves, are inadequate criteria for the diagnosis of perinatal asphyxia or subsequent neurologic handicap. Even with the addition of a ...
Benson C B - - 1994
PURPOSE: To assess the outcome of early first-trimester pregnancies with slow embryonic heart rates. MATERIALS AND METHODS: Forty pregnant women had prenatal ultrasound scans obtained before 8 weeks gestation that demonstrated an embryonic heart rate of 90 beats per minute or less. Follow-up information was used to determine pregnancy status ...
Dawes G S - - 1994
OBJECTIVE: To determine the effect of maternal administration of dexamethasone on fetal heart rate and its variation. DESIGN: Retrospective analysis of computerised data derived from cases studied over three years. SETTING: High risk pregnancy unit, John Radcliffe Hospital, Oxford. SUBJECTS: Twenty-eight pregnant women, at 27 to 32 weeks of gestation, ...
Phelan J P - - 1994
OBJECTIVE: Our goal was to review the perinatal characteristics of 48 singleton term infants with central nervous system neurologic impairment. STUDY DESIGN: Medical records were retrospectively reviewed for maternal characteristics, prenatal and intrapartum care patterns, neonatal course, and long-term outcome. Those patients without evidence of an obvious acute asphyxial event, ...
Herbst A - - 1994
OBJECTIVE: To compare the efficacy in detecting signs of fetal hypoxia in labour of intermittent (I-group) versus continuous (C-group) electronic fetal monitoring in women with low or moderate risk factors for fetal distress. DESIGN: A prospective, randomised study. SETTING: A tertiary referral centre. SUBJECTS: Four thousand and forty-four parturients at ...
Ayala D E - - 1994
Whereas conventional time-unspecified single measurements of blood pressure and heart rate may mislead, influenced as they are, among other factors, by the individual's emotional state, position, diet and external stimuli generally, the chronobiologic evaluation of predictable variability in these physiologic variables assesses early cardiovascular disease risk in pregnancy by (a) ...
Berkus M D - - 1994
OBJECTIVE: To determine the risk of adverse neonatal outcome associated with meconium-stained amniotic fluid independent of that related to antepartum or intrapartum abnormalities. METHODS: A cohort of 2200 consecutive deliveries was examined and the fetal heart rate (FHR) tracings analyzed independently. Singleton term pregnancies without fatal malformations were stratified by ...
Goodwin T M - - 1994
OBJECTIVES: To describe the use of fetal scalp blood sampling on a large teaching service over 7 years and to assess any association between changes in use and the rates of cesarean delivery for fetal distress and of various indirect indicators of perinatal asphyxia in term infants. METHODS: We reviewed ...
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