咳嗽是一种保护反射活动,通过咳嗽机体可将痰或异物咳出,但频繁的咳嗽会给病人带来很大的痛苦,因而要适当地应用祛痰药或镇咳药,解除病人痛苦。痰是支气管粘膜的分泌物,它能刺激支气管的疾受器,引起咳嗽。粘稠的痰液很容易阻塞细小的支气管或引起管腔狭窄,通气障碍,加重呼吸衰竭。 Cough is a kind of protective reflex activity. It coughs the body to cough up sputum or foreign body, but frequent cough will bring great pain to the patient. Therefore, expectant or antitussive should be properly used to relieve the patient’s pain. Phlegm is the secretion of bronchial mucosa, it can stimulate the bronchial receptor, causing cough. Viscous sputum is very easy to block small bronchi or cause stenosis, ventilation problems, aggravating respiratory failure.