نتایج جستجو برای: fetal heart rate fhr
تعداد نتایج: 1331747 فیلتر نتایج به سال:
The aim of this study was to evaluate the impact of vibroacoustic stimulation (VAS) on computerized cardiotocography short-term variability (STV) and approximate entropy (ApEn) in both low- and high-risk pregnancies. VAS was performed on 121 high- and 95 low-risk pregnancies after 10 minutes of continuous quiet, while their FHR parameters were monitored and recorded by cCTG analysis. Fetal hear...
In respect to the main goal of our ongoing work for analyzing fetal electrocardiogram (FECG) signals for monitoring the health of the fetus, we investigate in this paper the possibility of extracting the fetal heart rate (FHR) directly from the abdominal composite recordings. Our proposed approach is based on a combination of Independent Component Analysis (ICA) and least mean square (LMS) adap...
Accurate identification of Perinatal Hypoxia from visual inspection of Fetal Heart Rate (FHR) has been shown to have limitations. An automated signal processing method for this purpose needs to deal with time series of different lengths, recording interruptions, and poor quality signal conditions. We propose a new method, robust to those issues, for automated detection of perinatal hypoxia by a...
The monitoring of fetal heart rate (FHR) status is an important method to check well-being of the baby during labor. Since the electronic FHR monitoring was introduced 40 years ago, it has been expected to be an innovative screening test to detect fetuses who are becoming hypoxic and who may benefit from cesarean delivery or operative vaginal delivery. However, several randomized controlled tri...
Fetal Heart Rate (FHR) is clinically used for early detection of fetal acidosis. Despite a marked interest in automatic detection procedures, FHR analysis remains a challenging signal processing task, receiving considerable research attention. Among other difficulties, the two stages of labor (dilation and active pushing) produce very different FHR dynamics. Most research efforts, however, have...
Fetal Heart Rate (FHR) signals exhibit a random-like variability dependent on the fetus health. Previous studies explain this variability with the presence of power law correlations among neighbor samples, suggesting a fractal structure in the FHR. In this paper we use an efficient algorithm presented in [1], called Chang’s method, to analyze the fractal behavior of FHR sequences. In our study,...
A number of methods of the qualitative assessment of fetal heart rate (FHR) signals are based on supervised learning. The classification methods based on the supervised learning require a set of training recordings accompanied by the reference interpretation. In the real data collections the class of signals related to fetal distress is usually under-represented. Too small percentage of distres...
The fetal monitoring is based on a fetal heart rhythm analysis, and aimed at the detection of early symptoms of the intrauterine fetal hypoxia. The most often used method for acquisition of the fetal heart rate (FHR) during pregnancy is the Doppler ultrasound technique. When a penetrating beam is reflected from the moving parts, like valves of the fetal heart, its frequency is shifted according...
OBJECTIVE Despite the ubiquity of electronic fetal monitoring, the validity of the relationship between various fetal heart rate (FHR) patterns and fetal acidemia has not yet been established in a large unselected series of consecutive pregnancies. The aim of this study was to examine the published literature for evidence of such a relationship. METHODS Four hypotheses based on assumptions in...
The present experiments should show if vena caval occlusion (V. C. O.) results in a decrease in uterine blood flow and increase in uterine vascular resistance (UVR). We are further interested to know, if V. C. O. influences fetal heart rate (FHR) and fetal blood pressure (BP).
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