人群中约4％有多年来每年数次的鼻衄(NB),Petruson(1974)名之为HNB,可由鼻腔局部和全身病 引起,亦有无明显病因者。血管病变的出血与血清中钾、钠、钙、镁离子和组织胺(H)、缓激肽及其它NHR因子有关。正肾上腺素(NA)是肾上腺能神经的介质,对鼻粘膜阻力和容量血管的收缩起重要作用;胆碱能神经可抑制肾上腺素的释出而引起血管扩张;5-羟色 Approximately 4% of the population has nostrils (NB) several times a year over many years and Petruson (1974) name HNB, which can be caused by nasal local and systemic disease with no obvious cause. Bleeding from vascular lesions is associated with serum potassium, sodium, calcium, magnesium and histamine (H), bradykinin, and other NHR factors. Norepinephrine (NA) is the mediator of the adrenal nerve and plays an important role in nasal mucosal resistance and capacity contraction of the blood vessels; cholinergic nerve inhibits the release of epinephrine and causes vasodilation; 5-hydroxy