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(来源:网络)
\n\n可以说,一氧化碳中毒事件就从未停止过,就拿 2018 年来说,我国发生非职业性一氧化碳中毒人数就高达 8888 人,也就说平均每 1 个小时就有 1 人发生一氧化碳中毒[1]。
\n\n很多人虽然知道一氧化碳中毒,但并不晓得一氧化碳是怎么中的毒,毒害有多大,所以平日也很少有这方面的安全意识,在真的发生一氧化碳中毒的时候,也没有防备,无形中增加了继续中毒的风险。
\n\n不过说归说,一氧化碳中毒还真要当成大事来对待,因为它是个名副其实的“隐形杀手”,轻则伤人,重则死人。
\n\n它就是一个“C”+“O”,即 CO;
\n\n它是一种无色、无味的气体。
\n\n它主要来源于自然变异,如火山爆发、丛林大火,此外还有人类的贡献,如燃气、汽车尾气、化工及生物燃料等。
\n\n我们生活中常用的煤气,主要成分就是一氧化碳。
\n\n而一些含碳燃料,如煤炭、木炭、天然气、汽油,在门窗紧闭、缺氧的情况下燃烧不充分,也会产生一氧化碳。
\n\n大家都知道,人活着就要进行新陈代谢,而氧气是新陈代谢的必需品。当我们呼吸的时候,氧气从肺泡进入血管,再由 “运输车”血红蛋白把氧气运送给身体各个角落的细胞。
\n\n然而,当一氧化碳被吸入肺部,同样会进入血管与血液中的血红蛋白结合,形成碳氧血红蛋白(COHb)。
\n\n可怕的是,血红蛋白与一氧化碳的亲和度是血红蛋白与氧气的 240 倍[2],也就是说,遇到一氧化碳后,血红蛋白再也不是氧气的专属车了。
\n\n这样一来,身体内的血红蛋白无法将氧气运输到全身各处,就会使各组织缺氧,如果持续或缺氧严重,就会导致组织受损而无法正常“工作”,进而出现一系列的症状。
\n\n这就是一氧化碳中毒!
\n\n说到中毒,你是不是会不由得想到电视剧电影里面的“突然倒地、口吐白沫或鲜血”的中毒场景?
\n\n那毕竟是剧情,和现实还是有很大差距的!
\n\n关于一氧化碳中毒,可谓表现各异,如果没有一定经验,很难确定是否中毒。
\n\n一氧化碳中毒患者可以出现头痛、头晕、乏力、疲劳等类似感冒的症状[3]。
\n\n可以出现恶心、呕吐等类似胃肠道疾病等症状[3]。
\n\n可以出现红斑、大水疱等皮疹症状[4]。
\n\n可以出现心慌、心跳加速、胸痛等类似心脏病的症状[5]。
\n\n可以出现记忆力减退、语无伦次、走路不稳等类似帕金森病及痴呆的症状[6]。
\n\n当然,也可以出现抽搐、口吐白沫、大小便失禁等类似癫痫的症状[7]。
\n\n……
\n\n总之,一氧化碳中毒对全身各器官都可造成损害,如果症状轻微,或是在中毒早期,普通人很难想得到是一氧化碳中毒。但如果怀疑是一氧化碳中毒的话,建议患者要赶快到医院做个血气分析,以明确到底是不是一氧化碳中毒。
\n\n说实话,有没有救,得看中毒有多深。
\n\n根据血液中碳氧血红蛋白(COHb)的浓度,可以将一氧化碳中毒程度分为轻、中、重度中毒[8]。
\n\n当血液中 COHb 浓度在 10%~30% 时,一般为轻度中毒,常表现头痛、眩晕、恶心、呕吐、四肢无力等,如果能立即脱离中毒环境,吸入新鲜空气,中毒症状很快就会缓解至消失[9]。
\n\n当血液中 COHb 浓度在 30%~40% 时,一般为中度中毒,除了上述症状加重外,还可出现皮肤、口唇、指甲的樱桃红色,心跳加快及昏迷等症状[10],如果抢救及时,一般很快就能清醒,而且预后良好。
\n\n当血液中 COHb 浓度超过 50% 时,一般为重度中毒,此时全身脏器受损较为严重,有生命危险,即使抢救过来,也常留有后遗症[11]。
\n\n现在有效的预防措施有:
\n\n一氧化碳中毒特别是急性一氧化碳中毒,现场急救尤为重要,也许就是那短短的几分钟、简单的几个动作,就能挽救一条生命。
\n\n一氧化碳中毒可发生在任何季节、任何地区,冬季是一氧化碳中毒的高发季节,而北方的供暖地区是一氧化碳中毒的高发地区,一定要做好防护措施,远离这个“隐形杀手”。
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