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poised 电子烟依然存在二手烟E-Cigarettes Just More Smoke and Mirrors, Doctors Say
At first, electronic cigarettes were a novelty — something a braggart in a bar might puff to challenge the established no-smoking policy, marveling bystanders with the fact that the smoke released from the device was merely harmless vapor.
Now, e-cigarettes are poised to be a billion-dollar industry, claimed as the solution to bring in smokers from out of the cold, both figuratively and literally, as e-cigarettes promise to lift the stigma of smoking and are increasingly permitted at indoor facilities where smoking is banned.
So, are e-cigarettes safe? Well, they"re not great for you, doctors say. What"s being debated is the degree to which they are less dangerous than traditional cigarettes.
1940 revisited
E-cigarettes are battery-powered devices, often shaped like traditional cigarettes, with a heating element that vaporizes a liquid nicotine solution, which must be replaced every few hundred puffs. Nicotine is inhaled into the lungs, and a largely odorless water vapor comes out of the device. Puffing an e-cigarette is called vaping.
Yet the industry"s duplicity is clear to medical experts: E-cigarettes are marketed to smokers as a means to wean them off of tobacco (although studies show they don"t help much); yet the same devices, some with fruity flavors, are marketed to young people who don"t smoke, which could get them hooked.
Hooked? Yes, e-cigarettes are a nicotine-delivery system, highly addictive and ultimately harmful because of their nicotine.
Cancer and respiratory experts see the same ploy being played out today with e-cigarettes as was done in the 1940s with cigarettes, when America started smoking en masse. They often are distributed for free and pitched by celebrities and even doctors as cool, liberating and safe.
In an ad for a product called blu eCigs, celebrity Jenny McCarthy, infamous for encouraging parents not to vaccinate their children, encourages young adults to vape, enlisting words such as "freedom" and the promise of sex. In another ad, for V2 Cigs, a medical doctor named Matthew Huebner — who is presented without affiliation but is associated with a Cleveland Clinic facility in Weston, Fla. — implies that vaping is as harmless as boiling water.
As for the notion of e-cigs as liberating, the cost of a year"s worth of e-cigarette nicotine cartridges is about $$600, compared with $$1,000 yearly for a half-pack a day of regular cigarettes.
As for whether they"re safe, it"s a matter of comparing the advantages of one addiction over another.
E-cigarettes not a patch
One would think that vaping has to be safer than smoking real cigarettes. Experts say they are probably safer, but safer doesn"t mean safe.
"Cigarettes have their risk profile," said Dr. Frank Leone, a pulmonary expert at the University of Pennsylvania Medical Center in Philadelphia. And just about everyone who breathes understands the risks: circulatory disease and myriad cancers, for starters. "E-cigarettes might be better off compared to that profile. But that doesn"t mean they don"t have their own risk profile."
A top concern is the nicotine delivery rate, Leone said. With nicotine patches and gum, the nicotine delivery is regulated, with small amounts of nicotine released slowly into the bloodstream. But with traditional cigarettes and now e-cigarettes, heat creates a freebase form of nicotine that is more addictive — or what smokers would call more satisfying. The nicotine goes right into the lungs, where it is quickly channeled into the heart and then pumped into the brain.
Once addicted, the body will crave nicotine. And although nicotine isn"t the most dangerous toxin in tobacco"s arsenal, this chemical nevertheless is a cancer-promoting agent, and is associated with birth defects and developmental disorders.
A study published in 2006 in the journal Obstetrics and Gynecology, for example, found that women who chewed nicotine gum during pregnancy had a higher risk of birth defects compared to other nonsmokers.。