Siemens A31 사용자 설명서

U.S. FDA

A56 AE, A31008-H5320-A100-1-4A19 (31. October 2002, 18:19)

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2. Researchers conducted a large

battery of laboratory tests to assess

the effects of exposure to mobile

phone RF on genetic material. These

included tests for several kinds of ab-

normalities, including mutations,

chromosomal aberrations, DNA

strand breaks, and structural chang-

es in the genetic material of blood

cells called lymphocytes. None of

the tests showed any effect of the RF

except for the micronucleus assay,

which detects structural effects on

the genetic material. The cells in this

assay showed changes after expo-

sure to simulated cell phone radia-

tion, but only after 24 hours of expo-

sure. It is possible that exposing the

test cells to radiation for this long re-

sulted in heating. Since this assay is

known to be sensitive to heating,

heat alone could have caused the ab-

normalities to occur. The data al-

ready in the literature on the re-

sponse of the micronucleus assay to

RF are conflicting. Thus follow-up re-

search is necessary.

FDA is currently working with
government, industry, and academic
groups to ensure the proper follow-
up to these industry-funded
research findings. Collaboration with
the Cellular Telecommunications
Industry Association (CTIA) in
particular is expected to lead to FDA
providing research
recommendations and scientific
oversight of new CTIA-funded
research based on such

recommendations.
Two other studies of interest have

been reported recently in the litera-

ture:
• Two groups of 18 people were ex-

posed to simulated mobile phone

signals under laboratory condi-

tions while they performed cogni-

tive function tests. There were no

changes in the subjects' ability to

recall words, numbers, or pic-

tures, or in their spatial memory,

but they were able to make choic-

es more quickly in one visual test

when they were exposed to simu-

lated mobile phone signals. This

was the only change noted among

more than 20 variables com-

pared.

• In a study of 209 brain tumor cas-

es and 425 matched controls,

there was no increased risk of

brain tumors associated with mo-

bile phone use. When tumors did

exist in certain locations, howev-

er, they were more likely to be on

the side of the head where the

mobile phone was used. Because

this occurred in only a small

number of cases, the increased

likelihood was too small to be sta-

tistically significant.

In summary, we do not have enough

information at this point to assure

the public that there are, or are not,

any low incident health problems as-

sociated with use of mobile phones.

FDA continues to work with all par-