Bedienungsanleitung Sendo X (Seite 181 von 198) (Englisch)

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Regulatory Compliance and SAR

175 Sendo X User Guide

How much evidence is there that hand-held

mobile phones might be harmful?

Briefly, there is not enough evidence to know for

sure, either way; however, research efforts are on-

going. The existing scientific evidence is conflicting

and many of the studies that have been done to date

have suffered from flaws in their research methods.

Animal experiments investigating the effects of RF

exposures characteristic of mobile phones have

yielded conflicting results. A few animal studies,

however, have suggested that low levels of RF could

accelerate the development of cancer in laboratory

animals. In one study, mice genetically altered to be

predisposed to developing one type of cancer

developed more than twice as many such cancers

when they were exposed to RF energy compared to

controls. There is much uncertainty among scientists

about whether results obtained from animal studies

apply to the use of mobile phones. First, it is

uncertain how to apply the results obtained in rats

and mice to humans. Second, many of the studies

that showed increased tumor development used

animals that had already been treated with cancer-

causing chemicals, and other studies exposed the

animals to the RF virtually continuously—up to 22

hours per day.

For the past five years in the United States, the

mobile phone industry has supported research into

the safety of mobile phones. This research has

resulted in two findings in particular that merit

additional study:

1. In a hospital-based, case-control study,

researchers looked for an association between

mobile phone use and either glioma (a type of

brain cancer) or acoustic neuroma (a benign

tumor of the nerve sheath). No statistically

significant association was found between mobile

phone use and acoustic neuroma. There was

also no association between mobile phone use

and gliomas when all types of types of gliomas

were considered together. It should be noted that

the average length of mobile phone exposure in

this study was less than three years.

When 20 types of glioma were considered

separately, however, an association was found

between mobile phone use and one rare type of

glioma, neuroepithelliomatous tumors. It is possible

with multiple comparisons of the same sample that

this association occurred by chance. Moreover, the

risk did not increase with how often the mobile

phone was used, or the length of the calls. In fact,

the risk actually decreased with cumulative hours of

mobile phone use. Most cancer-causing agents

increase risk with increased exposure. An ongoing

study of brain cancers by the National Cancer

Institute is expected to bear on the accuracy and

repeatability of these results

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 abnormalities,

including mutations, chromosomal aberrations,

DNA strand breaks, and structural changes in the

genetic material of blood cells called

lymphocytes. None of the tests showed any effect

of the RF except for the micronucleus assay,

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