A measurement method of endothelium dilatation function uses a cuff to pressure testees limb for measuring endothelium dilatation function and includes: setting cuff internal pressure as a low pressure default value measuring the cuff pressure to obtain cuff pressure variation during blood vessel normal period setting cuff internal pressure as a high pressure default value releasing the pressure to the low pressure default value and measuring cuff pressure to obtain cuff pressure variation during blood vessel reactive hyperemia period comparing the cuff pressure variation of the blood vessel reactive hyperemia period and the cuff pressure variation of the blood vessel normal period to obtain a difference value and dividing the difference value by the cuff pressure variation during the blood vessel normal period to obtain an index of the endothelium dilatation function. Thus, compared to the ultrasonic measurement method, this measurement method not only can lower the cost, but also can increase popularity and sensitivity.一種內皮細胞擴張功能的量測方法,藉由氣囊對受測者肢體施壓來量測血管內皮細胞的擴張功能,且包含:將氣囊內壓設定為低壓預設值;量測氣囊壓以得到血管常態期之氣囊內壓變化量;將氣囊內壓設定為高壓預設值;洩壓至低壓預設值後,量測氣囊壓以得到血管反應性充血期之氣囊內壓變化量;比較血管反應性充血期之氣囊內壓變化量與血管常態期之氣囊內壓變化量以得到差異值;及將差異值除以血管常態期之氣囊內壓變化量以得到血管內皮細胞擴張功能的指標值,因此,相較於使用超音波的方式,不但可降低成本,也增加普及程度和具有較高靈敏度。5‧‧‧氣囊6‧‧‧氣壓調整電路61‧‧‧數位類比轉換器62‧‧‧幫浦控制器63‧‧‧幫浦7‧‧‧處理器8‧‧‧氣壓感測電路81‧‧‧感測器82‧‧‧帶通濾波器83‧‧‧放大器84‧‧‧類比數位轉換器9‧‧‧螢幕
