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笑气

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2017-07-06 16:20China Daily Editor: Yao Lan ECNS App Download

笑气

laughing gas

Chinese student Lin Na (not her real name) got hooked on laughing gas while studying in the U.S., resulting in serious injury.

中国学生林娜(化名)在美国学习期间吸食笑气成瘾,导致身体机能严重受损.

笑气(laughing gas),学名一氧化二氮(nitrous oxide),在室温下是无色(colorless)、无味的不可燃气体(odorless non-flammable gas).温度升高后,可成为很强的氧化剂(powerful oxidizer).

因为具有麻醉效果(anaesthetic effects),一氧化二氮曾经被广泛应用于外科和牙科治疗;也因为吸入此气体之后,人会产生愉悦的感觉(euphoric effects),所以才会得名"笑气".此外,一氧化二氮还可用作火箭推进剂中的氧化剂(oxidizer in rocket propellants),以及赛车时提升发动机的动力输出(increase the power output of engines).

据媒体报道,年轻人吸食"笑气"时先将气体冲进气球,然后抱着气球吸食,这种气球被称为"嗨气球"(dizzy balloons).

"笑气"进入血液后会导致人体缺氧,长期吸食可能引起高血压(high blood pressure)、晕厥(syncope),甚至心脏病发作(heart attack).长期接触此类气体还可引起贫血(anemia)及中枢神经系统损害(central nervous system injury)等.如果超量摄入,很可能因为缺氧导致窒息死亡(die of suffocation).

目前,笑气尚未列入我国麻醉药品品种目录(catalogue of narcotic drugs)、精神药品品种目录(catalogue of psychotropic drugs).国家食药监局曾发布一份关于"吸入笑气"的界定通知,明确标注吸入笑气镇痛装置被列为第三类医疗器械.

 

  

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