目的：研究异丙酚、依托咪酯对气道平滑肌张力的直接影响。
Objective:To explore the direct effects of propofol and etomidate on the isolated tracheal smooth muscle.
目的：探讨艾叶油的扩张气道平滑肌、镇咳、祛痰作用及机制。
OBJECTIVE :To evaluate the bronchodilating, antitussive and expectorant effects of essential oil extracted from Artemisia argyi.
抗胆碱药作用于气道平滑肌上的特定毒蕈碱受体，以抑制迷走张力。
Anticholinergics act by blocking muscarinic receptors in the smooth muscle of the airways and inhibiting vagal tone.
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