Hague S, Hill D W, Crabtree A
Department of Ophthalmology, Royal College of Surgeons, London, U.K.
Exp Eye Res. 1988 Jul;47(1):87-96. doi: 10.1016/0014-4835(88)90026-7.
The constriction of retinal vessels occurring in response to breathing 100% oxygen was studied in 10 normal subjects over a period of 30 min. Brachial blood pressure, radial pulse and end tidal CO2 were recorded throughout. The mean arteriolar constriction was 15.3% +/- 4.6 and venous constriction 21.8% +/- 4.3. Time constants (the time for 95% of the maximal response to have occurred) were 2.25 min +/- 0.75 and 2.37 min +/- 0.57 for arterioles and veins respectively. A highly variable late vascular response was recorded. A small proportion of arterial vessels showing a response were nonuniform while a larger proportion of veins showed a significant dilatation.
在10名正常受试者中研究了吸入100%氧气时视网膜血管的收缩情况，持续时间为30分钟。全程记录肱动脉血压、桡动脉脉搏和呼气末二氧化碳。平均小动脉收缩率为15.3%±4.6%，静脉收缩率为21.8%±4.3%。小动脉和静脉的时间常数（达到最大反应95%所需的时间）分别为2.25分钟±0.75分钟和2.37分钟±0.57分钟。记录到一种高度可变的晚期血管反应。显示有反应的动脉血管中有一小部分不均匀，而较大比例的静脉则出现明显扩张。
