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著者用眼底血管测径器研究了在氧气吸入时对视网膜血管的影响。所用的氧气借气体麻醉装置压缩为95%的浓度,并借面罩与外界空气隔绝,同时不停的观察血氧改变情况。被检者为男性,屈光正常,19～25岁,双眼视力1.0,心血管系统检查正常,动脉压正常。用2%普拉几非林散瞳后进行视网膜血管观察,这种药物对视网膜血管管径无任何影响。给氧前测1次视网膜血管管径,在氧气吸入后的半小时内每分钟测量1次,停止供氧后一直观察到动静脉的管径恢复到正常。为记载眼底情况,在吸氧前及吸氧6分钟时
The authors used retinal vascular calipers to study the effects on retinal blood vessels during oxygen inhalation. The oxygen used was compressed to a concentration of 95% by a gas anesthesia device and isolated from the outside air by a mask while constantly observing changes in blood oxygen. The subjects were male, normal refractive, 19 to 25 years old, visual acuity of 1.0, cardiovascular system was normal, normal arterial pressure. Retinal blood vessels were visualized with 2% praline nonfine mydriasis and showed no effect on retinal vessel diameter. The retinal vascular diameter was measured before oxygen administration and was measured once per minute within half an hour after oxygen inhalation. The diameter of the arteriovenous vein was observed after the oxygen supply was stopped, and returned to normal. To record the situation of the fundus, before oxygen and oxygen 6 minutes