燃气中毒与急救
一、什么是煤气中毒?
煤气的毒性来自一氧化碳。人在含有0.1%(体积)一氧化碳的环境中呆1小时左右,就有头痛、恶心、呕吐、四肢无力等中毒现象。当空气中一氧化碳含量达到1%(体积)时,人体吸入2-3分钟便失去知觉,这就是我们日常所说的煤气中毒。
二、一氧化碳中毒有哪些症状?
一氧化碳中毒一般分急性和慢性中毒两种。
1、急性中毒:急性中毒又分为轻、中、重三种。
①轻度:表现为头晕、眼花、头痛、耳鸣,并且恶心呕吐、心悸、四肢无力。应脱离现场,呼吸新鲜空气或进行适当地治疗,症状可迅速消失。
②中度:除上述症状外,还表现为多汗、烦躁、步态不稳、皮肤或黏膜苍白、意识朦胧甚至昏迷。如能及时抢救可很快苏醒。
③重度:除具有一部分或全部中度中毒症状外,患者进入昏迷状态。可持续几小时或几天。往往出现牙关紧闭,全身抽动,大小便失禁和血压上升、心律不齐等。重度中毒经及时抢救,脱离昏迷后,症状逐渐好转。有的重症患者在苏醒之后,经过一段“清醒期”又出现一系列神经系统严重受损的表现。
2、慢性中毒:长期接触一氧化碳可能有以下症状:
①神经系统:头痛、头昏、失眠、无力、记忆力减退,注意力不集中、血压不稳定,甚至出现震颤、步态不稳等。
②心血管系统:出现心肌损害及冠状动脉供血不足,心电图改变,如各种类型的心律不齐,低血压及房室传导阻滞等。
三、在室内通风不良时,燃烧燃气为什么会发生中毒?
燃气燃烧需要空气中的氧气来助燃。如果通风条件不好,由于氧气不足,导致燃烧不完全,产生一定的一氧化碳,其浓度逐渐升高,使人体缺氧加重,直至导致最后窒息。
四、使用燃气时应采取哪些防毒措施?
1、应着重检查燃气管道、阀门及胶管接头处是否有松动漏气现象,如果发现应及时修理或更换。
2、燃气灶具停用时,应检查一下阀门是否关闭。常发生燃着的炉灶因其他原因熄灭。误认为阀门关闭,长时间的排放燃气,造成事故隐患,甚至中毒、爆炸事故,这样的例子不胜枚举。
3、在使用燃气时,厨房内要保持良好的通风条件。
五、哪些因素决定煤气中毒的轻重?
煤气中毒的轻重,取决于接触煤气的浓度和时间。浓度越高,接触的时间越长,则中毒程度越重。在同样浓度煤气的情况下,一个劳动者要比一个安静的人,中毒严重得多。不难想象,婴儿和儿童,一般气体交换较活跃,需氧量也多,在同样环境中较成人更易中毒。对于一个贫血的患者,病情往往加重,甚至死亡。
六、如何抢救中毒患者?
1、尽快将患者移至新鲜空气处,解开上衣衣扣,保持呼吸畅通。
2、施行人工呼吸,最简便的是口对口进行人工呼吸。
3、吸氧,最常用的方法是鼻导管吸氧。
4、应立即进行胸部按摩。
5、速送医院抢救。
- 上一篇:燃气泄漏如何处置方法
- 下一篇:安全使用燃气热水器

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