AThrough scientific model calculation, the average effective dose equivalent of a urea carbon fourteen breath test is 1.59μSV. The national standard stipulates that the public's annual dose equivalent is limited to 1mSV, so each person will receive 629 carbon-14 breath tests per year and will not exceed the standard. An accidental trial or even 1-2 trials after eradication therapy is very safe...
ABased on the safety of the urea carbon 14 breath test, neither my country's CFDA nor the US FDA restricts children from receiving the urea carbon 14 breath test. The U.S. FDA allows children and minors to perform carbon 14 breath tests, and the foreign carbon 14 dose is 1 microhabit, while the dose of Hydewei is 0.75 microhabit, which is more safe.
AUrea is the final product of human metabolism and does not accumulate in the body. Its biological half-life is about 6 hours. For HP-negative subjects, urea intake can be basically excreted from the bladder within 24 hours. In HP-negative subjects, urea will be broken down and exhaled from the respiratory tract in the form of carbon dioxide, with a faster elimination rate. After carbon 14 is disch...
AThe International Commission for Radiological Protection Publication No. 84 "Pregnancy and Medical Exposure" pointed out that a fetal dose below 100mGy should not be considered as a reason for termination of pregnancy.
AHumanitarian, the preliminary clinical trials of urea carbon 14 will never use special populations such as pregnant women and breastfeeding women to conduct human trials, and there will be instructions on "pregnant women and breastfeeding women with caution".
AFirst of all, don't be anxious. Drink plenty of water. Due to HP-negative subjects, the ingested urea can be basically excreted from the bladder within 24 hours. In HP-positive subjects, urea will be broken down and exhaled from the respiratory tract in the form of carbon dioxide, with a faster elimination rate. Therefore, the radiation impact of misuse of urea carbon 14 on the human body is ...
