Many of the inspection methods used in medical care have radiation, such as the most commonly used X -ray and CT.
Is it strictly forbidden to accept these inspections during pregnancy?If you have to do it, will it affect your baby?Why does radiation affect the baby?
The radiation generated by X -ray and CT is called ionizing radiation.It is characterized by great energy. It is so large that it can ionize atoms, which can directly damage the cells or change the DNA structure, causing harm to the human body.
Is it necessary to take CT when you are pregnant?
The answer is: not necessarily.
The impact of ionizing radiation on the baby can be evaluated from two aspects:
1. The size of the radiation;
2. The size of the baby, that is, the pregnancy stage.
Discarding doses are all hooligans
Let’s talk about the problem of radiation doses first.How much dose of ionizing radiation will affect the baby in the stomach?
Scientific research pointed out that the radiation dose of intellectual impact on the fetus will be between 200 mgy and 400 MGY; the ionizing radiation control is below 50 MGY, there will be no adverse consequences such as abortion, teratogenic or affecting fetal intelligence.
So, what is the concept of 50 Mgy?Compared with our daily X -ray, CT and other inspections, is it big or small?
The following form shows the impact of various examinations on the baby in the stomach, let’s take a look:
It is easy to see from the table that the commonly used inspection items, the amount of radiation received by the baby is less than 50 MGY.
Gao Hui, deputy chief physician of the obstetrics and gynecology department of Beijing Tiantan Hospital, reminded expectant mothers that X -rays are spread on -line, so as long as they are not shooting abdominal flat tablets, they can put a lead plate on the abdomen of expectant mothers to reduce the side effects of ionizing radiation.To the smallest.
Effect of radiation dose
In addition to the radiation dose, the effect of radiation on the baby in the belly is also different in different pregnancy doses.
0 to 4 weeks of pregnancy: This is a "all or no stage". At this stage, if the baby is harmed by ionizing radiation, it is still safe or directly, or it will be directly killed, and there will be no "injury persistence";
5-8 weeks of pregnancy: This is the early stage of cell differentiation, and the fetus will be more sensitive.But as long as it is controlled by the doses mentioned above, scientific research is considered safe;
8 to 15 weeks of pregnancy: This is the period when radiation has the greatest impact on the baby’s intellectual development, but you don’t have to panic.
Scientists’ research on the Japanese atomic bomb during World War II showed that during this period, the radiation volume was as high as 1,000 MGY, and 40% of the fetal intelligence decreased.60%.
Generally speaking: After the early pregnancy, the larger the gestational week, the more radiation doses that can cause hazards to the baby, and it is gradually growing.In other words, after the sensitive period, the baby’s resistance to radiation is getting stronger and stronger.
Moreover, in the environment of our lives, there is originally ionizing radiation from nature.This is also called "background radiation" or "bottom radiation". Whether you stay at home, go to the beach, take the sun, and take a plane … The "background radiation" that the Earth people receive a year on average are about 2.4 MGYThe amount is equivalent to accepting a pelvic CT scan.
The harm of ionizing radiation is relatively certain. For expectant mothers, when they can avoid contact with ionization radiation, they should still be actively avoided, especially in the first three months of pregnancy.