低浓度一氧化氮吸入筛选重度肺动脉高压根治手术适应证

目的　以一氧化氮吸入作为评估先天性心脏病 (先心病 )重度肺动脉高压病人肺血管扩张能力的方法 ,寻找筛选肺动脉高压手术适应证的最佳标准。方法　选择先心病重度肺动脉高压病人 5 3例 ,分别行右心导管检查 ,测定每例在基础状态下 ,吸入纯氧或一氧化氮各时点血流动力学参数 ,并进行统计学分析。结果　 5 3例吸入一氧化氮、纯氧与基础状态下相比较 ,肺动脉收缩压 ,舒张压及平均压两两之间均存在明显差异 (P <0 0 5 ) ;主动脉收缩压 ,舒张压及平均压两两之间均无明显差异 (P >0 0 5 ) ;肺循环阻力与体循环阻力之比在吸入一氧化氮及吸氧后均明显降低 (P <0 0 5 ) ,而吸入一氧化氮和吸氧之间无明显差异 (P >0 0 5 )。 36例采取手术治疗。结论　术前吸入一氧化氮肺循环阻力与体循环阻力之比下降与否与手术疗效密切相关。

Inhalation of nitric oxide to screen patients with congenital heart disease and pulmonary hypertension for operation

Objective: We assessed whether inhalation of low dose of nitric oxide comparing with administering 100% oxygen during cardiac catheterization would be as a method to screen patients with congenital heart disease and pulmonary hypertension for operation. Methods: We chose 67 cases of congenital heart disease with pulmonary hypertension undergoing cardiac catheterization. While spontaneously breathing room air (FiO 2, 0 21), the pulmonary artery pressure (PAP) and pulmonary vascular resistance (PVR) were recorded as baseline. Patients continued to breathing 40 ppm nitric oxide with FiO 2 0.30 and 100% oxygen, for 30 minutes. Effects of inhalation of nitric oxide on pulmonary vasculature were studied. Results: Comparing with breathing room air, after inhalation of 100% oxygen or 40 ppm nitric oxide, PAP, PVR and PRV/SVR were decreased significantly. Conclusion: Comparing with administer 100% oxygen, inhalation of nitric oxide is more sensible and reliable predictor in selecting patients with congenital heart disease and pulmonary hypertension for operation.