西宁地区位于青藏高原东北边缘 ,海拔 2 2 60ｍ ,本文通过对 1 994年来收治的 2 0例鼻出血病例的分析 ,试图阐述高原地区鼻出血与高海拔红细胞增多症之间的某些联系。临　床　资　料　　 2 0例中 ,男 1 4例 ,女 6例 ,男女之比为 2 .3 3 1 ;年龄 2 9岁～ 67岁 ,高发年龄在 40岁 The Xining region is located at the northeastern edge of the Qinghai-Tibet Plateau with an elevation of 2260m. By analyzing 20 cases of nasal bleeding healed in 1994, this paper attempts to explain some of the links between nosebleeds in the plateau region and high altitude polycythemia. Clinical data 20 cases, 14 males and 6 females, male to female ratio was 2.331; age 29 to 67 years, high incidence of 40 years of age