时间:2019-01-08 作者:英语课 分类:Scientific American(一)月


英语课

We like to think that medical equipment implanted in our bodies undergoes rigorous testing before it’s put inside a person. That’s not always the case, at least for cardiovascular devices. That’s according to an article in the Journal of the American Medical Association.


Researchers evaluated the FDA pre-market approval process for 78 high-risk devices, such as pacemakers, stents and implanted defibrillators. They had assumed that these types of devices should and would be subject to random 1 double-blinded studies with controls over an appropriate time-frame to investigate safety and efficacy.


But for 51 of the devices—65 percent—approval was based on a single study. Only 27 percent of studies were randomized, and only 14 percent were blinded. Only half of the devices were compared with controls.


The authors recognize the tension between sufficient testing and the need to get new drugs and devices to the public. But, they say, “The bar for evidence of benefit should be higher for devices because they are implanted and cannot simply be discontinued, as drugs can. In addition, although devices can be lifesaving, they also have great potential for risk and adverse 2 events.”

 



adj.随机的;任意的;n.偶然的(或随便的)行动
  • The list is arranged in a random order.名单排列不分先后。
  • On random inspection the meat was found to be bad.经抽查,发现肉变质了。
adj.不利的;有害的;敌对的,不友好的
  • He is adverse to going abroad.他反对出国。
  • The improper use of medicine could lead to severe adverse reactions.用药不当会产生严重的不良反应。
标签: SSS defibrillator
学英语单词
A.N.U.
acleris pulchella pulchella
agathidium (agathidium) fuliginosum
alcalimeters
anatricrotic
antiogoside
arctiopicrin
as drunk as an owl
atomic object model
Ayrton-Mother galvanometer
be of kin
bobbin wheel
britholite-(Y)
centrum germinativum
chin
chirosophy
collateral estoppels
computer aided production planning
condition branch
corvoes
counter-orders
court-leets
curablenesses
dead-hard steel
direct steam heating system
dryer-pulveriser
electrical discharge arc
elegantine
encircular
exfoliators
family budget survey
fastness to chlorination
filler clay
flux asbestos backing method (fab)
four-way union
free thought
grain store
ground-coverings
Hart Jaune R.
head up tilt
hexadecimal number system
homestand
horologies
Hundstein
ideas
International Cooperation administration
Kesso-bamate
leather bag
leaving the world
lecithinase
Lenhossek's processes
Limnophila indica
line of constant bearing
master control gage
mismailing
Mondulkiri
Muffin the Mule
multiway cock
oikesis
okuri odori (japan)
overwet mix
paranephric bodies
pauciradiatus
photosynthetic lamellae
physiognomonic
phytogeographical zone
pi-mu atom
pierre curies
proof of transport
pulp fiction
punching out
pygmean
pyrrolizines
removing dampness to reduce phlegm
Roblecito
Satanities
savodinskite
semisecrecy
sheinkin
Shīveh
simple piston gauge
small disturbance airplane dynamics
solution of triangle
souche
stajkovic
stress strain relation
Themis
ticket-fixing
til-tree
tip bucket
toll administration
trailed away
trod a measure
turkey-cocks
unspiked
ventilating
vexatious suit
volcanic debris
waffling on
went into force
Windows Live Mail Desktop
wytenonfa