肺心病病人并发急性呼吸道感染时,痰液粘稠,不易喀出,再加上支气管痉挛,粘膜及粘膜下水肿和纤毛破坏,使呼吸道引流不畅,不但影响通气和换气功能,且能助长细菌繁殖和继发感染,导致抗感染治疗的失败;再者,稠痰堵塞细支气管将妨碍氧气进入肺泡,使氧气疗法徒 Pulmonary heart disease patients complicated by acute respiratory infections, sputum thick, not easy to get together, coupled with bronchial spasm, mucosal and submucosal edema and ciliary destruction, respiratory tract poor drainage, not only affect the ventilation and ventilation functions, and can contribute to bacteria Breeding and secondary infection, leading to the failure of anti-infective therapy; Furthermore, thick sputum blocked bronchioles will prevent oxygen from entering the alveoli, oxygen therapy