作者在已经用低至中等剂量吸入性皮质类固醇 (ＩＣＳ)治疗的有症状的哮喘病人比较加用长效β2 激动剂沙美特罗 (Ｓａｌｍｅｔｅｒｏｌ)与加用丙酸氟替卡松 (ＦＰ)对气道粘膜固有层血管分布(以数量表示 ,即血管重建指标 )的影响。方法　本研究为安慰剂对照、双盲、平行分组研究 The authors compared long-acting β2 agonist salmeterol with fluticasone propionate (FP) on the intrinsic airway mucosa in patients with symptomatic asthma who had been treated with low to moderate doses of inhaled corticosteroids (ICS) The effects of layer vascularity (expressed in terms of number, ie, revascularization index). Methods This study was a placebo-controlled, double-blind, parallel-group study