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预防煤气中毒主题班会教案

  • 2026-04-27 18:05:23
预防煤气中毒主题班会教案

学习目标

      1、了解煤气中毒事件,提高安全防范意识;

       2、分析煤气中毒的原因,懂得面临煤气中毒事件时如何自救;

       3、初步掌握防煤气中毒安全知识。

学习重点:了解煤气中毒的情况及处理方法;

学习难点:煤气中毒的处理方法;

教学过程:

      一、导入新课:

      煤气中毒是怎么回事?什么是煤气中毒?大家回家的时候有没有问自己认识的人是否发生过煤气中毒?当时是怎么的抢救的?

      二、学习新课:

      1、煤气中毒的季节和原因

      (1)每年的冬天,人们烤火或用热水器洗澡的时稍不注意,就会发生煤气中毒的现象。

      (2)因为天气的问题,关闭所有窗户,导致空气不流通引发煤气中毒。

      (3)由于用户的忽略,导致煤气瓶的阀门没有关闭,从而引发煤气中毒。

      2、煤气中毒的过程

      我们知道人体的血液是由红细胞、白细胞、血小板及血浆组成。人们在生命过程中所需要的氧气,是靠红血球中血红蛋白把氧气带给人体的各个部分的。煤或木炭在氧气不足、燃烧不完全时,会产生一氧化碳气体-煤气。一氧化碳攻击性很强,空气中含0.04%~0.06%或以上浓度很快进入血流,在较短的时间内强占人体内所有的红细胞,紧紧抓住红细胞中的血红蛋白不放,使其形成碳氧血红蛋白,取代正常情况下氧气与血红蛋白结合成的氧合血红蛋白,使血红蛋白失去输送氧气的功能。一氧化碳与血红蛋白的结合力比氧与血红蛋白的结合力大300倍。一氧化碳中毒后人体血液不能及时供给全身组织器官充分的氧气,这时,血中含氧量明显下降。大脑是最需要氧气的器官之一,一旦断绝氧气供应,由于体内的氧气只够消耗10分钟,很快造成人的昏迷并危及生命。

      3、煤气中毒的症状

      一氧化碳气体能与人体红血球中血红蛋白结合,使血红蛋白丧失携带氧气的能力而是人发生中毒。中毒前期出现的症状是:头昏头痛,眼花心慌,恶心呕吐,紧接着上述症状加剧,眩晕昏睡,脉搏细快而弱,血压下降。最后常常因为严重缺氧而窒息死亡。

      4.急救的方法

      如果发现煤气中毒的患者,首先应该立即打开门窗,将患者移到空气新鲜`通风透气的地方,紧接着通知医院派车和医生前来抢救。

      三、班会过程提要

      1、问答题

      (1)假如你煤气中毒了,你该怎么办?

      (2)目前我国北方许多地区冬季取暖仍采用煤炉,因使用炉火不慎而造成煤气中毒的事故常有发生,是什么原因导致煤气中毒呢?

      (3)如何预防煤气中毒?尝试举例加以说明。

      2,实例分析讨论。3个在校外租房准备考研的女生煤气中毒。所幸其中一女生及时打开门,3人幸免于难。她和另外两个同样准备考研的校友合租了一套三室一厅的房子。昨下午4时许,3人在有空调的客厅里看书,厨房在烧开水。 “不知过了多久,我们都觉得头晕,全身没力气……”小郭说,她和另一个同学渐渐没了力气,趴在书桌上动不了;小李则用虚弱的声音问是不是煤气中毒了,刚说完,她也瘫倒在地。但小李并没放弃希望,她慢慢往门边爬去,两米不到的距离,爬了很久。她终于站了起来,门被打开了,一股新鲜空气进来。“我当时只有一个念头,不打开门大家都要完蛋。”小李说。约过了10分钟,小李体力有所恢复,打电话叫来同学,她们被送往校医院。

      (1)、小组讨论,这个实例说明了什么现象?

      (2)、假如这种现象发生在你身上,你怎么处理?

      四、课后小结

      1、 通过这次主题班会,同学门都基本掌握了什么是煤气中毒,以及发生了煤气中毒该采取的措施。

      2、让学生在思想上,意识上要懂的自我保护、提高应急、自救与保护能力

      3、提高日常生活的保护意思,从小事做起。养成良好的生活习惯。

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  1. CONNECT:[ UseTime:0.000565s ] mysql:host=127.0.0.1;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000760s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000319s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000252s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000490s ]
  6. SELECT * FROM `set` [ RunTime:0.000200s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000559s ]
  8. SELECT * FROM `article` WHERE `id` = 458437 LIMIT 1 [ RunTime:0.000412s ]
  9. UPDATE `article` SET `lasttime` = 1777441507 WHERE `id` = 458437 [ RunTime:0.018702s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000348s ]
  11. SELECT * FROM `article` WHERE `id` < 458437 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000883s ]
  12. SELECT * FROM `article` WHERE `id` > 458437 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.002888s ]
  13. SELECT * FROM `article` WHERE `id` < 458437 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.003922s ]
  14. SELECT * FROM `article` WHERE `id` < 458437 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.005164s ]
  15. SELECT * FROM `article` WHERE `id` < 458437 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.004397s ]
0.107876s