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RF r a dia t ion w or k ?
Since t here are no know n risks from exposure t o RF em issions from
w ireless phones, t here is no reason t o believe t hat accessories t hat claim
t o shield t he head from t hose em issions reduce risks. Som e product s t hat
claim t o shield t he user from RF absorpt ion use special phone cases, w hile
ot hers involve not hing m ore t han a m et allic accessory at t ached t o t he
phone. St udies have show n t hat t hese product s generally do not work as
advert ised. Unlike “ hand- free” kit s, t hese so- called “ shields” m ay int erfere
wit h proper operat ion of t he phone. The phone m ay be forced t o boost it s
pow er t o com pensat e, leading t o an increase in RF absorpt ion. I n
February 2002, t he Federal t rade Com m ission ( FTC) charged t w o
com panies t hat sold devices t hat claim ed t o prot ect w ireless phone users
from radiat ion w it h m aking false and unsubst ant iat ed claim s. According t o
FTC, t hese defendant s lacked a reasonable basis t o subst ant iat e t heir
claim .
W h a t a bou t w ir e le ss ph on e in t e r fe r e n ce w it h m e dica l e qu ipm e n t ?
Radio frequency energy ( RF) from wireless phones can int eract wit h som e
elect ronic devices. For t his reason, FDA helped develop a det ailed t est
m et hod t o m easure elect rom agnet ic int erference ( EMI ) of im plant ed
cardiac pacem akers and defibrillat ors from w ireless t elephones. This t est
m et hod is now part of a st andard sponsored by t he Associat ion for t he
Advancem ent of Medical inst rum ent at ion ( AAMI ) . The final draft , a j oint
effort by FDA, m edical device m anufact urers, and m any ot her groups,
w as com plet ed in lat e 2000. This st andard w ill allow m anufact urers t o
ensure t hat cardiac pacem akers and defibrillat ors are safe from w ireless
phone EMI . FDA has t est ed w ireless phones and helped develop a
volunt ary st andard sponsored by t he I nst it ut e of Elect rical and Elect ronic
Engineers ( I EEE) . This st andard specifies t est m et hods and perform ance
requirem ent s for hearing aids and w ireless phones so t hat no int erference
occurs when a person uses a com pat ible phone and a com pat ible hearing
aid at t he sam e t im e. This st andard was approved by t he I EEE in 2000.
FDA cont inues t o m onit or t he use of wireless phones for possible
int eract ions wit h ot her m edical devices. Should harm ful int erference be
found t o occur, FDA w ill conduct t est ing t o assess t he int erference and
w ork t o resolve t he problem .
Addit ional inform at ion on t he safet y of RF exposures from various sources
can be obt ained from t he follow ing organizat ions:
FCC RF Safet y Program :
ht t p: / / w w w .fcc.gov/ oet / rfsafet y/
Environm ent al Prot ect ion Agency ( EPA) :
ht t p: / / w w w .epa.gov/ radiat ion/
Occupat ional Safet y and Healt h Adm inist rat ion's ( OSHA) :
ht t p: / / w ww .osha.gov/ SLTC/ radiofrequencyradiat ion/ index.ht m l
Nat ional inst it ut e for Occupat ional Safet y and Healt h ( NI OSH) :
ht t p: / / w w w .cdc.gov/ niosh/ em fpg.ht m l
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