According to the second rule, preference is given to studies that provide the most accurate information, and the choice of research should also obey the first rule. Based on the foregoing, the doctor may prescribe several studies, which in total are sufficiently informative, instead of one highly informative study, however, causing more harm to the fetus. The third rule states that the time required for the study must be taken into account without fail, since in obstetric practice you often have to deal with situations where every minute counts.
During the examination, the patient is in a horizontal position, and the sensor of the apparatus is applied to the stomach of the pregnant woman in the place where the fetal heart sounds are best heard.
The position of the pregnant woman is horizontal. With indirect electrocardiography, electrodes are applied to its abdominal cavity, registering the electrical activity of viagra pills fetal heart and transmitting information about them to the cardiograph, which displays them in the form of a curve on the monitor screen or on paper tape.
A parallel cardiography of the pregnant woman herself is recommended in order to distinguish her cardiac complexes from those of the fetus. This study is prescribed starting from 11 - 12 weeks of pregnancy, viagra, it reaches the greatest information content after 32 weeks. Direct fetal cardiography is performed directly during childbirth with the opening of the cervix at least 3 cm.
In this case, the electrode is applied to the head of the fetus.
During the study, the pregnant woman is in the supine position. Two sensors are applied to her stomach. The first ultrasound probe is placed where the fetal heart rate is best heard. The second sensor is installed on the right corner of the uterus and registers its contractions.
With the help of this study, it is possible to determine the basal rhythm of the fetus (average heart rate over the last 10 minutes), as well as to determine the degree of fetal hypoxia during contractions based on changes in the heart rate.