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    冬天小心“隱形殺手” 一氧化碳

    作者:王嘉   來源:三秦都市報   日期:2019-01-15 10:33:58
    導讀:冬季寒冷,很多人在淋浴、取暖時缺乏必要的常識和預防措施,造成一氧化碳中毒事故,因此,克服麻痹思想,掌握預防煤氣中毒基本常識十分重要。
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      煤氣是一種無形“殺手”,其主要成分是一氧化碳氣體。如果人體吸入大量的一氧化碳就會嚴重缺氧,從而造成煤氣中毒。冬季寒冷,很多人在淋浴、取暖時缺乏必要的常識和預防措施,造成一氧化碳中毒事故,因此,克服麻痹思想,掌握預防煤氣中毒基本常識十分重要。
     

      煤氣中毒是咋回事
     

      煤氣中毒通常指的是一氧化碳中毒,一氧化碳不僅僅在燒煤時產生,其他情況如燒炭、使用燃氣熱水器等都能在環境中產生一定濃度的一氧化碳。當一氧化碳吸入肺中,與血紅蛋白結合,生成碳氧血紅蛋白,使血液失去運送氧氣的能力,造成人體組織缺氧。凡屬含碳的燃料,如汽油、煤油、木炭等,缺氧而不能充分燃燒時,會產生大量的一氧化碳。一氧化碳無色無味,比空氣輕,易于燃燒,燃燒時為藍色火焰。如果空氣中一氧化碳含量達到0.04%——0.06%時,就可以使人中毒。
     

      一氧化碳中毒的誤區
     

      誤區一:只有燒煤才會引起中毒。實際上,凡屬含碳的燃料如汽油、煤油、木炭等,在缺氧而不能充分燃燒時,皆可產生大量的一氧化碳。
     

      誤區二:室內沒有煤煙不會引起中毒。一氧化碳是一種無色、無味氣體,一氧化碳中毒往往在不知不覺中發生。
     

      誤區三:用濕煤封火或放一盆水不會引起一氧化碳中毒。一氧化碳極難溶于水,而且水分和煤在高溫下會發生化學反應,生成一種叫水煤氣的混合體,內含有大量一氧化碳,且比重大,更易在室內留存,增加中毒的危險性。
     

      誤區四:爐上烤棗核、橘皮能解一氧化碳中毒。在煤爐上烤這些香型物質只能增加室內的清香味,并不能吸收一氧化碳和預防中毒。
     

      誤區五:裝設煙筒或風斗就不會中毒。遇大風倒煙、煙筒被堵塞等情況時,一氧化碳排不出或排量少,也會發生中毒。而許多人使用舊風斗,或風斗過小、安裝高度不夠等,一氧化碳排出不暢,也能引起中毒。
     

      誤區六:灌醋和酸菜湯能救中毒病人。對于一氧化碳中毒尤其是處于昏迷狀態的病人,硬往嘴里灌醋或酸菜湯,容易嗆入肺內,阻斷肺泡氣體交換,致使病情加重,甚至死亡。
     

      誤區七:門窗有縫隙不會中毒。空氣比重為1,一氧化碳比重為0.967,如果門窗縫隙處于低處,一氧化碳也不易排出。
     

      容易造成一氧化碳中毒的地方
     

      很多家庭將燃氣熱水器安裝在了洗浴間里,燃氣不完全燃燒,如果時間過長,一氧化碳容易蓄積,加上天冷關窗,導致中毒事故發生。在車里開著空調睡覺也是很危險的,汽車發動機怠速空轉時,汽油燃燒不充分,會產生大量含有一氧化碳的廢氣,廢氣通過汽車的空調入風口進入車內,引起中毒發生。當使用液化氣,如果管道漏氣、開關不緊,均可使液化氣大量溢出,造成中毒。
     

      正確預防一氧化碳中毒
     

      家庭安裝一氧化碳探測器,并定期檢查維護,以確保探測器正常運行。選擇正規廠家生產的、質量合格的燃氣灶具、熱水器;需請專業人員安裝,經檢測合格后方能使用。不要私自更改燃氣、煤氣管道設施。要防止管道老化、跑氣、漏氣,導致煤氣溢出。定期對燃氣、燃氣灶具、熱水器減壓閥和皮管以及燃氣、煤氣管道進行檢修,如發現有老化、破損、銹蝕、漏氣或關閉不嚴等問題時,應及時更換和維修。長時間使用燃氣用具時,一定要開窗通風,保證空氣流通。入睡前檢查煤氣閥門是否關好,否則在睡夢中發生煤氣中毒更危險。使用燃氣熱水器時,禁止將燃氣熱水器安裝在洗浴房間內,應將其安裝在洗浴房間外靠近窗戶的地方或室外。不要在密閉的室內吃炭火鍋、點炭火盆。不要長時間在密閉車廂內靠發動機供暖,更不能在發動機持續燃燒時在車廂內睡覺。駕駛或乘坐空調車如感到頭暈、發沉、四肢無力時,應及時開窗呼吸新鮮空氣。
     

      預防煤氣中毒,最重要的一點是注意日常使用要室內通風。日常使用時,即使在冬季寒冷時節,也要注意做好室內通風工作。切記不能關閉門窗。要將窗戶稍微打開留有一條縫,在不影響室內溫度的前提下,確保可以有新鮮空氣隨時進來。
     

      使用天然氣時這些細節別忽視
     

      燃氣設備應設置在具有耐火、防火性能的廚房內,廚房不得堆放易燃易爆物品,燃氣管道上嚴禁掛物品,不得有第二種火源,要保證用氣環境的通風換氣。天然氣管道閥門、流量計等設施要經常檢查,定期保養。如果將這些設施封閉起來,給檢查維修帶來不便,而一旦發生漏氣事故,也不能及時發現,聚集密閉環境里的天然氣極易發生火災,爆炸事故。
     

      在做飯、燒水時,鍋、壺里的水不要盛滿,以防止湯水沸騰溢出澆滅火焰,造成漏氣。在有風時,火焰可能被風吹滅,造成漏氣,應做好防風措施。如果長期外出,應將天然氣計量表前、后閥門全部關閉。
     

      需要注意漏氣的地方:閥門、燃氣表、灶具及燃氣管道的接口處。灶具旋塞閥的芯子處,旋塞閥同噴嘴的連接處。管道及燃氣表本身因生銹而腐蝕穿孔。通常采用涂肥皂水的方法,先用肥皂或洗衣粉配置成一定濃度的肥皂水,再用軟毛刷蘸肥皂水,涂抹于易漏部位,發現肥皂水連續氣泡即為漏氣點,切記嚴禁明火查漏。萬一發現漏氣,先關閉表前閥、灶前閥等閥門。輕開門窗通風,嚴禁動明火和開啟電源,在安全區域撥打搶修電話。
     

      一氧化碳中毒有哪些癥狀
     

      輕度中毒。輕度的時候患者會惡心、眩暈,有人在做飯時,感覺身體無力,想睡覺,這個時候趕緊開窗,吸入新鮮空氣,然后自己在有意識的時候離開這種環境,癥狀會很快減輕、消失。
     

      中度中毒。在輕度的基礎之上,患者會出現半昏迷狀態。比如說,能叫醒,但緊接著又睡過去了,這個時候要迅速撥打急救電話,在急救車趕到之前,先把患者抬到通風的地方。
     

      重度中毒。這個時候患者是完全深度昏迷,怎么叫都叫不醒,并且大小便還失禁,拍打也沒有反應。這個時候就先把患者抬到外面,注意保暖。然后在急救車到來之前,讓患者成側躺狀,讓里面的嘔吐物流出,避免造成窒息。然后再拍打患者的背部,保證患者能夠順利呼吸,等待救護車到來。
     

      一氧化碳中毒現場的急救原則
     

      不要貿然施救,尤其是在較為封閉、通風不良的場所,以免施救人員中毒造成事故擴大,煤氣比空氣略輕,先充滿上部空間,施救或逃生時應彎腰前行。應盡快讓患者離開中毒環境,并立即打開門窗,流通空氣,患者應安靜休息,避免活動后加重心、肺負擔及增加氧的消耗量。對中毒較輕的病人,可以讓他喝些濃茶、鮮蘿卜汁和綠豆湯等。對神志不清的中毒患者必須盡快抬出中毒環境,讓病人平躺,解開衣扣和褲帶。在最短的時間內,檢查病人呼吸、脈搏等,根據情況進行緊急處理。中毒者呼吸心跳停止,應立即進行人工呼吸和心臟按壓,并盡快送往醫院搶救,特別要注意的是在運送患者到醫院途中不可中斷搶救措施。
     

      一氧化碳中毒者如得到及時救治,絕大多數能夠恢復正常。但也有部分嚴重中毒者在意識恢復正常后,經過一段時間的“假愈期”,約2—60天,又出現一系列如發呆、記憶力嚴重減退、無故傻笑或行為失常等癥狀,稱“遲發性腦病”。為了預防遲發性腦病,中毒者要聽從醫囑,接受充分治療,切勿擅自停止治療。(陜西發展觀察)

     

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