每日一题_2023.05.31

A 5-year-old boy was playing outside during recess when he began to experience difficulty breathing. He was brought to his physician, because his symptoms seemed to be getting worse. On examination, the physician notes that the boy is struggling to breathe and hears diffuse wheezing bilaterally. The boy’s heart rate is 98/min, respiratory rate is 24/min, and oxygen saturation is 90%. His medical history is significant only for seasonal allergies and mild eczema. Which type of medication will alleviate this patient’s respiratory symptoms?

一个5岁的男孩在课间休息时在外面玩耍，突然开始感到呼吸困难。他被带到他的医生那里，因为他的症状似乎越来越严重。在检查时，医师注意到该男孩呼吸困难，并听到双侧弥漫性哮鸣。患儿心率98次/分，呼吸频率24次/分，血氧饱和度90%。他的病史只有季节性过敏和轻度湿疹才有意义。哪种药物可缓解该患者的呼吸道症状?

(A) β1 Antagonist

(B) β1 Agonist

(C) β2 Agonist

(D) Histamine1 agonist

(E) Histamine2 agonist

答案解析：

这名患者正在经历急性哮喘发作。治疗以缓解支气管收缩和炎症为目标。该患者应使用沙丁胺醇等β2激动剂治疗。当被激动剂激活时，β2受体将引起支气管扩张。

正确答案：C