Level I Prenatal Ultrasound

Grade I prenatal ultrasound, which is generally black and white B-ultrasound, is used to rule out fatal malformations, including no brain, severe brain swelling, severe open spina bifida, severe chest and abdominal wall defects, visceral eversion, single cavity Heart, fatal cartilage dysplasia and other conditions. The inspector pulls down the trousers to expose the lower abdomen. The medical examiner applies the gel to the examination site, touches the pregnant woman's abdomen with the probe, observes the fetus through the display screen, and records the data. Basic Information Specialist classification: maternity check check classification: ultrasound Applicable gender: whether women are fasting: not fasting Analysis results: Below normal: Poor embryo development. Normal value: 4 weeks fetus: 0-0.2 cm 5-week fetus: 0.2 cm - 0.4 cm 6 weeks fetus: 0.4 cm - 0.85 cm 7-week fetus: 0.85 cm - 1.33 cm Above normal: The embryo develops too fast. negative: Positive: Tips: Before the inspection: Do not urinate, remove the metal decoration. Normal value The 4-week fetus is only 0.2 cm. The fertilized egg just finished the implantation, the amniotic cavity is formed, and the volume is small. Ultrasound still does not see signs of pregnancy. The 5-week fetus grows to 0.4 cm, enters the embryonic stage, the amniotic cavity enlarges, the original cardiovascular appears, and there may be pulsations. B-small can see small fetal sac, the fetal sac accounts for less than 1/4 of the uterine cavity, or visible fetal buds. The 6-week fetus grows to 0.85 cm, and the fetal head, cerebral ventricle, frontal organs, respiration, digestion, nerves and other organs are differentiated. The B-ultrasound sac is clearly visible, and the fetal bud and fetal heartbeat are seen. The 7-week fetus grows to 1.33 cm. The embryo has a human embryo, the body segment has been completely differentiated, the limbs are separated, and the various systems are further developed. B-ultrasound clearly sees the fetal bud and fetal heartbeat, and the fetal sac accounts for about 1/3 of the uterine cavity. The 8-week fetus grows to 1.66 cm, and the fetal shape has been determined. The fetal head, body and limbs can be separated, and the fetal head is larger than the trunk. B-visible fetal sac accounts for about 1/2 of the official cavity, fetal morphology and fetal movement are clearly visible, and the yolk sac can be seen. The 9-week fetus grows to 2.15 cm, the fetal head is larger than the carcass, and the performance of each part is clearer. The skull begins to calcify and the placenta begins to develop. The B-ultra-visible fetal sac almost fills the uterine cavity, the fetal contour is clearer, and the placenta begins to appear. The fetus grows to 2.83 cm in 10 weeks, and all organs of the fetus have been formed, and the placenta is formed. B-visible fetal sac begins to disappear, the bud-shaped placenta is visible, and the fetus is active in amniotic fluid. At 11 weeks, the fetus grows to 3.62 cm, and the fetal organs develop further and the placenta develops. The B-ultra-visible fetal sac completely disappeared and the placenta was clearly visible. The 12-week fetus grows to 4.58 cm, and the external genitalia develops initially. If there is a deformity, the head calcification is more perfect. The skull aura is clear, the double top diameter can be measured, and the obvious deformity can be diagnosed. After that, the organs tend to be perfect. Clinical significance Abnormal results: Fetal dysplasia, some parts are unclear, fatal malformation, brain swelling, open spina bifida, visceral valgus, chest and abdominal wall defects, single-chamber heart, fatal cartilage dysplasia. People who need to be examined: women in pregnancy. Low results may be diseases: fetal dystrophy is not long, fetal death, fetal osteogenesis imperfecta, severe combined immunodeficiency results may be high disease: fetal fat, persistent occipital lateral position dystocia Before the inspection: Do not urinate and remove the metal decoration. When checking: Relax and actively cooperate with the doctor. Inspection process The inspector pulls down the trousers to expose the lower abdomen. The medical examiner applies the gel to the examination site, touches the pregnant woman's abdomen with the probe, observes the fetus through the display screen, and records the data. Not suitable for the crowd No taboos. Adverse reactions and risks No complications.