An electronic cigarette, also known as an e-cigarette, vapor cigarette or an e-cig, is an electrical inhaler that vaporizes a propylene glycol-, glycerin-, or polyethylene glycol-based liquid solution into an aerosol mist, simulating the act of tobacco smoking. It is often marketed as a smoking cessation aid or tobacco replacement. The similarities between conventional and electronic cigarettes are in the physical design and the nicotine release, which is approximately the same amount of nicotine as a conventional cigarette.
The primitive concept of an electronic cigarette can be traced to an idea by Herbert A. Gilbert, who in 1963 patented a device described as “a smokeless non-tobacco cigarette” that involved “replacing burning tobacco and paper with heated, moist, flavored air.” This device heated the nicotine solution and produced steam. In 1967, Gilbert was approached by several companies interested in manufacturing it, but it was never commercialized and disappeared from the public record after 1967.
Hon Lik, a Chinese pharmacist, is widely credited with the invention of the modern electronic cigarette. In 2000, he came up with the idea of using a piezoelectricultrasound-emitting element to vaporize a pressurized jet of liquid containing nicotine diluted in a propylene glycol solution. This design produces a smoke-like vapor that can be inhaled and provides a vehicle for nicotine delivery into the bloodstream via the lungs. He also proposed using propylene glycol to dilute nicotine and placing it in a disposable plastic cartridge which serves as a liquid reservoir and mouthpiece. These inventions are the basis of the present-day electronic cigarettes.
The device was first introduced to the Chinese domestic market in May 2004 as an aid for smoking cessation and replacement. The company that Hon Lik worked for, Golden Dragon Holdings, changed its name to Ruyan (如烟, literally “Resembling smoking”), and started exporting its products in 2005–2006 before receiving its first international patent in 2007.
World Health Organization
The World Health Organization stated in September 2008 that no rigorous, peer-reviewed studies have been conducted showing that the electronic cigarette is a safe and effectivenicotine replacement therapy. WHO does not discount the possibility that the electronic cigarette could be useful as a smoking cessation aid, but insisted that claims that electronic cigarettes can help smokers quit need to be backed up by clinical studies and toxicity analyses and operate within the proper regulatory framework
-From Wikipedia, the free encyclopedia-