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Until the present time there has been no accurate method for the determination in the living patient of the amount and extent of occlusion of the arteries of the extremities. I have already briefly described how this may be accomplished by intra-arterial injection of a solution of sodium iodid, and roentgen-ray photography. Further clinical experience with this method has demonstrated that it is a valuable method in the diagnosis of circulatory diseases of the extremities.
The solution injected is prepared by dissolving 100 gm. of sodium iodid crystals in 100 c.c. of distilled water. The solution is sterilized in the autoclave and is always used soon after its preparation. The solution should be colorless or very faintly yellowish. A solution that shows any considerable iodin color has not been used.
The method of obtaining the roentgenograms of the arteries of the lower extremities is as follows: The entire thigh is
BROOKS B. INTRA-ARTERIAL INJECTION OF SODIUM IODID: PRELIMINARY REPORT. JAMA. 1924;82(13):1016–1019. doi:10.1001/jama.1924.02650390006002
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