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12.5%碘化钠注射液,在临床上用作逆行肾脏造影剂。碘化钠在空气中不甚安定,受光线等的影响,常易变色,游离出碘,虽然加入抗氧剂如硫代硫酸钠及焦亚硫酸钠等,经放置一定时间后亦即发生部分变色及小白块。根据文献,可用乌洛托品防止变色。我们试验结果,以加入2%的乌洛托品最为适宜,成品放置一年以上未见发变化,效果良好。关于本制剂的安定性问题,我们曾作过一些研究,现讨论如下:一、试验证明,加硫代硫酸钠不能解决本制剂安定的原因有下三点:
12.5% sodium iodide injection, used clinically as a retrograde kidneys contrast agent. Sodium iodide in the air is not stable, affected by light and other effects, often easily discolored, free of iodine, although the addition of antioxidants such as sodium thiosulfate and sodium metabisulfite, after a certain period of time that is, that part of the color change and Small white blocks. According to the literature, hexamine can be used to prevent discoloration. Our test results to join 2% urotropine most appropriate, the finished product placed more than a year of no change, the effect is good. About the stability of the preparation, we have made some research, are discussed as follows: First, the test proved that adding sodium thiosulfate can not solve the stability of the preparation of the following three points: