原发性肺动脉高压症是一种原因不明的进行性致命性疾病。有报告显示长期静脉注射前列环素（PGIZ）的病人可以持久地改善症状，但与口服疗法相比，这种疗法很不方便，且可能有较多风险。贝雷普罗钠（beraprostsodium）是一种具有稳定结构的PGIZ类似物，可作口服。本文作者观察了 Primary pulmonary hypertension is an unidentified progressive fatal disease. It has been reported that long-term intravenous injection of prostacyclin (PGIZ) in patients with persistent symptoms can be improved, but compared with oral therapy, this therapy is very inconvenient, and may have more risks. Beraprost sodium is a PGIZ analog with a stable structure that can be taken orally. The author of this article has observed