首页
登录
职称英语
Headphones used with MP3 digital music players like the iPod may interfere w
Headphones used with MP3 digital music players like the iPod may interfere w
游客
2025-03-27
29
管理
问题
Headphones used with MP3 digital music players like the iPod may interfere with heart pacemakers (起搏器) and implantable defibrillators (除颤器) , U.S. researchers said.
The MP3 players themselves posed no threat to pacemakers and defibrillators, used to normalize heart rhythm. But strong little magnets inside the headphones can foul up the devices if placed within 1.2 inches of them, the researchers told an American Heart Association meeting in New Orleans.
Dr. William Maisel of the Medical Device Safety Institute in Boston led a team that tested eight models of MP3 player headphones, including clip-on and earplug types, in 60 defibrillator and pacemaker patients.
They placed the headphones on the patients’ chests, directly over the devices. The headphones interfered with the heart devices in about a quarter of the patients--14 of the 60--and interference was twice as likely in those with a defibrillator than with a pacemaker.
Another study presented at the meeting showed that cellular phones equipped with wireless technology known as Bluetooth are unlikely to interfere with pacemakers.
A pacemaker sends electrical impulses to the heart to speed up or slow heart rhythm. The magnet, however, could make it deliver a signal no matter what the heart rate is, the researchers said.
An implantable defibrillator signals the heart to normalize its rhythm if it gets too fast or slow. A magnet could de-activate it, making it ignore an abnormal heart rhythm instead of delivering an electrical shock to normalize it.
The devices usually go back to working the right way after the headphones are removed, the researchers said.
"The main message here is: it’s fine for patients to use their headphones normally, meaning they can listen to music and keep the headphones in their ears. But what they should not do is put the headphones near their device," Maisel said in a telephone interview.
So that means people with pacemakers or defibrillators should not place the headphones in a shirt pocket or coat pocket near the chest when they are not being used, and should not place them over their chest or have others who are wearing headphones rest their head on the patient’s chest, Maisel said. [br] Dr. William Maisel’s tests showed that ______.
选项
A、headphones had interference with the heart devices in every patient
B、haft of the models of MP3 player headphones had interference with heart devices
C、headphones had much stronger interference with a defibrillator than with a pacemaker
D、headphones had much stronger interference with a pacemaker than with a defibrillator
答案
C
解析
转载请注明原文地址:https://tihaiku.com/zcyy/4014881.html
相关试题推荐
HeadphonesusedwithMP3digitalmusicplayersliketheiPodmayinterferew
HeadphonesusedwithMP3digitalmusicplayersliketheiPodmayinterferew
HeadphonesusedwithMP3digitalmusicplayersliketheiPodmayinterferew
HeadphonesusedwithMP3digitalmusicplayersliketheiPodmayinterferew
HeadphonesusedwithMP3digitalmusicplayersliketheiPodmayinterferew
HeadphonesusedwithMP3digitalmusicplayersliketheiPodmayinterferew
LiketheIndustrialRevolution,thedigitalrevolutionhaschangedtheworldper
Thedramaticchangesbroughtaboutbydigitaltechnologieshaveimpactedthewho
Shewasamongthemost______playersinthegame,butthecaraccidentruinedeve
Thosenationsthatinterfereintheinternalaffairsofanothernationshouldbe
随机试题
AcenturyagointheUnitedStates,whenanindividualbroughtsuitagainst
(1)Myjobistoproviderelevant,factuallyaccurateinformationthatisint
NiagaraisanIndianword,whichmeans"roaringwater".Indeed,theroarof
下列不属于吊销安全生产许可证的情形是()。A.降低安全生产条件情节特别严重的
按生产法计算运输业净产值的计算公式为()。A.运输业净产值运输业总产值-运输业物
任何单位和个人都必须使用检定合格的计量器具()。
MRSA对β-内酰胺类抗菌药物产生耐药的主要机制是A.产生β-内酰胺酶B.低亲和
从抽象上升到具体的思维方法的逻辑过程的起点是 A.客观事物B.社会实践
与颊间隙不直接相通的间隙是()A.咽旁间隙 B.眶下间隙 C.咬肌间隙 D
易发生面瘫的肿瘤是A.混合瘤 B.黏液表皮样癌 C.腺泡细胞癌 D.腺样囊
最新回复
(
0
)