急(ji)性(xing)一氧化碳中毒(du)是我國(guo)發病和死亡人數最多(duo)的(de)急(ji)性(xing)職業中毒(du)。CO也(ye)是許多(duo)國(guo)家引起意外生活性(xing)中毒(du)中致死人數最多(duo)的(de)毒(du)物。急(ji)性(xing)CO中毒(du)的(de)發生與接觸(chu)CO的(de)濃度及時間有關。

　　我(wo)國車間空(kong)氣(qi)中CO的最高(gao)容許濃(nong)(nong)(nong)度(du)(du)為30mg/m3(24ppm)。有(you)資(zi)料證明，吸(xi)入空(kong)氣(qi)中CO濃(nong)(nong)(nong)度(du)(du)為240mg/m3(200ppm)共3h，Hb中COHb可(ke)超(chao)過10%;CO濃(nong)(nong)(nong)度(du)(du)達(da)292.5mg/m(235ppm)時(shi)，可(ke)使(shi)人(ren)產(chan)生嚴重(zhong)的頭痛、眩暈等癥狀(zhuang)，COHb可(ke)增(zeng)高(gao)至25%;CO濃(nong)(nong)(nong)度(du)(du)達(da)到 117Omg/m3(936ppm,接近1000ppm)時(shi)，吸(xi)入超(chao)過6Omin可(ke)使(shi)人(ren)發生昏迷(mi)，COHb約高(gao)至60%。CO濃(nong)(nong)(nong)度(du)(du)達(da)到11700mg/m3(10000ppm)時(shi)，數(shu)分鐘內可(ke)使(shi)人(ren)致死(si)，COHb可(ke)增(zeng)高(gao)至90%。