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【单选题】
,男,70岁,背部脂肪瘤10×12cm2,在局部浸润麻醉下,行脂肪瘤切除术,0.5%普鲁卡因用量200m1,因瘤体较大,又追加使用一些剂量。患者出现烦躁、惊厥,测量脉率为120次/min,呼吸为24次/min,血压30/20kPa,该患者发生了局部麻醉药中毒,可能的原因错误的是A.
局部麻醉药未适当减量
B.
术前未用苯巴比妥等药物
C.
局部麻醉药可能误入血管
D.
剂量过小
E.
注药前未回抽
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举一反三
【单选题】Which of the following about El Niño is TRUE according to the information given in the passage?
A.
The exact physical mechanisms of El Niño have not been discovered yet．
B.
The unusual nature of the 1997—1998 El Niño had been predicted before it occurred．
C.
The end of a strong El Niño can be predicted by using several forecast models．
D.
Many computer forecast models were very effective in predicting the rapid development of the 1997—1998 El Niño．