The expectant mothers who are just pregnant are inevitably nervous when they are ecstatic, especially when the fetal movement is not obvious, through a layer of belly, it is difficult to directly perceive the baby’s existence.The color Doppler ultrasound inspection allows us to intuitively understand the situation of the fetus, and naturally has become one of the most intense examination items for pregnant women and family members.Today, I will introduce the time and role of the color Doppler ultrasound during pregnancy, as well as the most tense NT ultrasound and "row defaults" of the majority of pregnant women.
How many ultrasound do you need to do during pregnancy?
First of all, let’s take a look at several ultrasound checks that must be done during pregnancy:
In these few ultrasound, most expectant mothers are the most nervous about the NT value of 11-13 weeks of pregnancy, and the "large row" ultrasound of 20 to 24 weeks of pregnancy.
Between the 11th and 13 weeks of pregnancy, that is, during the second birth examination, pregnant women must conduct a special color Doppler ultrasound -nT color ultrasound, which is the purpose of the preliminary screening of the fetus whether there are chromosomal abnormalities.NT refers to the thickness of the transparent belt of the fetal neck. In the short time of 11 to 13 weeks of pregnancy, the special structure behind the fetus can be clearly seen through ultrasound.With the increase of the gestational week and the fetal gradually develop, the transparent belt of the back of the neck will gradually disappear, so the NT color Doppler ultrasound can only be completed during this period.
The larger the NT value, the thicker the neck is transparent, and the more likely the possibility of genetic diseases such as dyeing abnormalities in the fetus. The corresponding examination may be performed during the subsequent delivery process to determine whether the fetus is problematic.In addition to observing NT, this color Doppler ultrasound also measures the relevant diameter of the fetal head, compares the measurement results with the early ultrasound, and can check whether the pregnancy week is accurate.If the expectant mother missed the first color Doppler ultrasound in the early pregnancy, the gestational week can be calculated through this color Doppler ultrasound examination.
Big row of tertiary ultrasound
The ultrasonic examination at 20 to 24 weeks of pregnancy is commonly known as "large row". The main purpose of this color Doppler ultrasound is to check whether the fetus is large and obvious in structure.It mainly includes the lesions of intracranial, heart, abdominal organs, and kidney, all of which are screened through this color Doppler ultrasound.Many severe fetal diseases during pregnancy can also be discovered during this color Doppler ultrasound.If there is no abnormal result of this color Doppler ultrasound, the risk of problems with the fetus will be greatly reduced.
At 20 to 24 weeks of pregnancy, the size of the fetus is appropriate, and the abdomen of pregnant women also has space for fetal changes to change the position of the fetus, which is convenient to find that most fetal structure abnormalities are found. On the other hand, if you find severe deformity, you can choose to terminate the pregnancy and reduce the physical and psychological of the expectant mother and psychology.Double blow.Screening scope of large rows:
Six categories of deformed — have no brain, severe brain swelling, severe open spine spine, severe chest and abdominal wall defects with internal visceral prosthesis, single cavity heart, and dysplasia.
Head and neck: skull, brain line, brain cavity, hill brain, brain, cerebellum, cerebellar, cerebellar, back skull nest pool, face facial facial, and other structures.
Spine: Understand the continuity of the spine, physiological bending, and vertebral bone arrangement.
Chest: chest wall integrity, heart position, heart chest proportion, four -cavity heart cut surface, left, and right ventricular debut surface, arterial catheter arch and aortic arch surface, trilateral -tracheal surface.
Abdominal: abdominal wall integrity, liver, stomach bubbles, kidney, intestinal tube, bladder, etc.
Limbs: Observe the humerus, ruler and radius, femur, tibia and fibula, measure the length of the femur, the shape, posture, and exercise of both hands and feet.
Fetal growth parameters measurement: double diameter, head circumference, abdominal circumference, femoral length.
Fetal attached structure: placenta position, maturity, amniotic fluid depth and index.
Measure the fetal umbilical artery S/D value.
In the ultrasonic examination, in order to find the appropriate observation angle, the doctor may press the pregnant woman’s belly slightly slightly. Don’t be nervous. Pay attention to cooperate with the doctor. Generally, you can complete it in about 10 minutes.However, if the fetal location is not appropriate and cannot be seen clearly, the doctor may let the pregnant woman walk around, wait for the baby to move, adjust the position adjustment before re -examination.It should be understood that ultrasound examination will also be affected by various factors, including the weight of pregnant women, the thickness of the abdominal fat, the gestational weeks and the fetal position, amniotic fluid, fetal skeletal sound shadow, etc. These will clearly affect the accuracy of ultrasonic diagnosis.On the other hand, fetal deformity is a dynamic process, and some malformations gradually showed with the increase of the gestational week.The diagnosis of "Unpredictable" in the ultrasound report is based on the existing equipment, technology, existing clinical and video materials, and screening level requirements. No other abnormal situation is found, not equal to certain "normal"There is no disease.
Source: Beijing Maternal and Child Health Service WeChat public account
Edit: Guo Lei