
didn't read .. Thyroid protection due to nuclear accidents and emergenciesIn 1982, the US FDA approved potassium iodide to protect thyroid glands from radioactive iodine involving accidents or fission emergencies. In an accidental event or attack on a nuclear power plant, or in nuclear bomb fallout, volatile fission product radionuclides may be released. Of these products, 131I is one of the most common and is particularly dangerous to the thyroid gland because it may lead to thyroid cancer. By saturating the body with a source of stable iodide prior to exposure, inhaled or ingested 131I tends to be excreted, which prevents radioiodine uptake by the thyroid. The protective effect of KI lasts approximately 24 hours. For optimal prophylaxis, KI must be dosed daily until a risk of significant exposure to radioiodine by either inhalation or ingestion no longer exists.
Potassium iodide cannot protect against any other causes of radiation poisoning, nor can it provide any degree of protection against dirty bombs that produce radionuclides other than radioisotopes of iodine. See fission products and the external links for more details concerning radionuclides.
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The World Health Organization does not recommend KI prophylaxis for adults over 40 years, unless inhaled radiation dose levels are expected to threaten thyroid function; because, the KI side effects increases with age and may exceed the KI protective effects "...unless doses to the thyroid from inhalation rise to levels threatening thyroid function, that is of the order of about 5 Gy. Such radiation doses will not occur far away from an accident site."[25]
回復 charliewindson
The wind can blow radioactive stuff to HK but it can also blow across th ...
fibbi 發表於 2011-3-17 10:12

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