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During this study, the pregnant woman is in the supine position or on her side. With transabdominal ultrasound, the sensor is applied to the skin of the anterior abdominal wall, and with transvaginal ultrasound, it is inserted into the vagina after putting on a condom.
The principle of the method is based on the fact that the degree of viagra 100 mg of ultrasonic waves from tissues depends on their density. The higher the density of the tissue, the more intensely ultrasonic waves will be reflected from it and the less waves will pass through it.
In the human body, moving objects are red blood cells (red blood cells) in the vascular bed. Thus, this method allows you to determine the direction of blood flow in the vessels of the organs of interest, its speed and volume. During this study, the pregnant woman is more often in an upright position, viagra generic, in some cases, other positions are also allowed. The examined part of the body must lean against the plane of the apparatus, behind which there is a film or a special cartridge.
The principle of the study is based on the fact that ionizing radiation passes through tissues of different densities in different ways. The denser the fabric, the more it is absorbed and vice versa. Thus, as a result of the study, a two-dimensional projection of the investigated fragment of the body is formed on the film, composed of sections of the film burned by viagra online and remaining intact.
All obtained data are displayed on the screen of the apparatus in the form of a two-dimensional projection of tissues under the wave source. Doppler ultrasonography of blood vessels of the placenta, umbilical cord, fetal heart and its main vascular highways.