Ultrasound examination is required during early pregnancy, but both doctors and patients will have some unreasonable statements and practices.
Some people think that ultrasound is very safe and should be examined more frequently. Only when they look at it frequently can they feel more at ease.
Others think that ultrasound may have adverse effects on the fetus and refuse to undergo ultrasound examination.
How is ultrasound examination suitable for early pregnancy?
In terms of ultrasound examination, we should not go to extremes. We should still do the normal ultrasound examination in early pregnancy, but we should not do too much ultrasound examination.
The purpose of ultrasound examination during early pregnancy is what?
In early pregnancy, ultrasound is needed to confirm several things:
How many embryos are there? Is the embryo in or out of the uterus? Is the embryo alive?
If it is multiple pregnancy, chorionic sex needs to be determined and gestational age needs to be accurately judged.
At the end of early pregnancy (11 ~ 14 weeks), ultrasound can also have the opportunity to find some fetal large structural abnormalities and measure the cervical transparent layer thickness (NT) to predict aneuploid chromosome abnormalities and other fetal structural abnormalities.
What is the principle of ultrasound examination during early pregnancy?
The time of fetal exposure to ultrasound should be minimized, diagnostic information should be obtained with the least scanning time and the lowest output energy, and ALARA (reasonable acquisition while minimizing exposure dose) principle should be applied.
Many international academic groups, including ISUOG (International Society of Obstetrics and Gynecology Ultrasound), have reached a consensus on the use of B-ultrasound and M-ultrasound for prenatal ultrasound examination: due to limited sound output, it is safe at all stages of pregnancy.
However, Doppler ultrasound is associated with more powerful energy output, so it has greater potential biological effects, especially when applied to a small area of interest.
Therefore, Doppler examination can only be used in early pregnancy when there are clinical indications.
What kind of ultrasonic instrument do you use?
In fact, for ultrasound examination during early pregnancy, as long as the clarity can meet the requirements, two-dimensional black-and-white ultrasound is usually enough, and what four-dimensional color Doppler ultrasound is not needed at all.
Four-dimensional color Doppler ultrasound imaging is not recommended to take photos during early pregnancy. ISUOG is clearly opposed to ultrasound examination for non-medical purposes.
Routine Doppler ultrasound is not recommended unless there are special indications.
Can vaginal ultrasound cause abortion?
Chinese people have too many unreasonable taboos during pregnancy, such as not willing to do transvaginal ultrasound, because many people worry that doing transvaginal ultrasound will easily cause abortion.
This statement is too unreasonable. I am too lazy to say that there is no evidence-based medical evidence to support it. If a transvaginal ultrasound will lead to abortion, then the operating room of the family planning clinic can be closed and those who want to have induced abortion can be pulled over to have a transvaginal ultrasound.
Who did you see who had a transvaginal ultrasound examination that caused the abortion? If it really happens occasionally, it is purely a coincidence, because the spontaneous abortion rate of early pregnancy itself is 10% ~ 15%, and you can also say that the abortion is caused by your mother-in-law giving you a white eye.
Ultrasound examination during early pregnancy is very important, what should be done is still to be done, but there is no need to repeat it without indications.
It is unreasonable to check progesterone level, take progesterone, inject progesterone intramuscularly, then [stay in bed to protect the fetus] and do ultrasound examination repeatedly during early pregnancy, unless there are indications.
If the patient voluntarily requests to do so, it is paying IQ tax and is active [leeks].
If the doctor voluntarily recommends you to do so, it is either ignorant or shameless.