Literature research: Is your NT thickening really thick or fake?You should watch it as early as possible!

Although I have performed the problem of NT thickening, sisters are constantly struggling with this problem. Many sisters have always believed that the NT value must be <2.5. As long as she exceeds 2.5, she is difficult to sleep and eat, for fear that the child will be a problem with a problem.

I have also checked some of the latest documents these days. Today I will summarize the results of these days, hoping to help sisters who have doubts about NT inspections.

01NT value is closely related to the length of the head and hip

You must not rigidly think that there is a fixed standard value in NT. Here, the sister tells you that there is no existence!

Different heads and hips are long, and the standard range of NT values is different.

NT examinations are generally recommended in 11-13 weeks. The size of the 11 weeks is completely different from 13 weeks. The thickness of 11 weeks must be smaller than 13 weeks.

In fact, for the measurement of NT, the size of the fetus corresponding to the gestational week, that is, compares the length of the head and hip.

Divide the nt value interval of each head and hip length as a normal fetus, remove the smallest five and the largest five, and take the 5th to 95th percentage in the middle, which is the normal NT value interval corresponding to the long hip length., Changji is 5th ~ 95th.

Such a calculation method is to avoid the difference in individual size of the fetus. As long as it is in this interval, this is a normal child.

In other words, the normal NT thickness should be less than 95th (read as less than 95 %). If NT thickness exceeds 95th, it is defined as NT thickening.

So what is the corresponding 95th corresponding to different heads and hips (gestational weeks)?

The following is the paper data published by Professor Kypros Nicolas in The Fetal Medicine Foundation. UK. The distribution of head and hip lengths and NT values provided by the data:

The horizontal coordinates of the figure above are the length of the fetus’s head and hip, the vertical coordination is NT value, and the blue area is normal NT value, so the normal value of the NT is different according to the length of the head and hip, which has a range.

Let me summarize, the growth of NT 95th and head and hips is about such a range:

Therefore, when you see your NT value, let’s compare the child’s head and hips, and then look at the most safe range of NT value. As long as you are in this range, you will not be considered as thickened by NT.

02NT really needs to induce labor?

Some children do have more than the above -mentioned safety value range, so can such children really not ask?

can’t read?Let me draw the key points:

NT reaches 3.0-3.5mm (95-99 percentage) fetus: about 93%are finally healthy;

Even if the NT reaches a 6mm fetus, there are about one -third of the opportunity to be a normal child;

NT value exceeds 6.5mm, and 15%of children are still a normal good child.

Therefore, everyone should not choose to induce labor because of a single NT thickening.

What should I do if 03NT thickening?

Many people think that the doctor’s examination of this hospital is not very accurate. Would you like to change a doctor or change a hospital to check it?

In fact, this necessity is not too large, because the NT value will definitely change with the gestational week. It is fluctuating. The maximum value is taken during measurement, and the measuring significance is not significant.

What we should do is to check whether the fetus has major congenital malformations or defects.

For example, you can choose NT combined with the serum indicators such as HCG and PAPPA, and combined with ultrasound to observe the nasal bone, venous catheter, three -pointed valve blood flow, and combine age and NT values.

Calculate a final risk value together, which is called early pregnancy combined screening.At this time, even if the NT is 3mm, the calculation may be low risk.

If you are still high risk, you can further choose non -invasive DNA, fluff biopsy or pumping of amniotic fluid.

If the non -invasive DNA is a low risk, the probability of the baby also has the probability of Tang’s syndrome than 1/1000.

If you are particularly concerned about NT thickening and worry that the above method may be missed. I hope that there is a reassurance pill, and you can also choose a villi biopsy or pumping amaranth. We are also called the "gold standard".

04nt value, in addition to screening, what can I do besides screening?

The NT value is related to the deformed malformation of the fetal congenital heart structure. It is the most common cause of non -chromosomal abnormal NT thickening.

In addition, the NT value is also related to other fetal structures.Such as skeletal system malformations, diaphragm hernias, abdominal wall defects (umbilical swelling), fetal dysfunction syndrome, etc. can also appear NT thickening.

In addition, it is also related to abortion.

It is worth mentioning that the NT value is normal, but it cannot be explained that there is no problem, but it is normal at this stage.

NT thickening, it only prompts that the next step is required.

In short, it is not that the NT thickening is not the fall. The vast majority of NT thickening finally proves that it is a good child. Do not start thinking about it because of the abnormal test results.

Solemnly declare

The content published by this account is only for information sharing. This account does not do any form of marketing and promotion. The viewpoint of the article cannot be used directly as a medical diagnosis or health intervention proposal.Please communicate with your healthcare provider before taking any prevention or treatment measures.

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references

[1] https://fetalmedicine.org/lists/map/certified/nt/nt; The Fetal Medicine Foundation (The Fetal Medicine Foundation)

[2] CUT-OFF VAlue of NuChal Translucence As Indication for Chromosomal Microarray Analysis, Ultrasound ObSTTTET GYNECOL. 50 (3): 293-294

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