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Harry W. Slade, M.D.
JAMA. 1958;166(5):526. doi:10.1001/jama.1958.02990050096019.
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To the Editor:—  With reference to an article in the Oct. 12, 1957, issue of the The Journal, page 679, "Hydraulic Device for Remote Control of Injection During Carotid Angiography" by Epstein and Epstein, I believe that there is a much simpler method of remote control of injection, which has been used at Cleveland City Hospital on the neurosurgical service. This consists of a 30-in. length of plastic tubing with Luer-Lok ends, which places the operator a considerable distance away from the site of injection and still gives one the desired "feel" of the injection. These tubes are manufactured by the Max Wocker & Son Co., of Cincinnati, and cost $30 per dozen. These are sterilized by soaking and can be used a considerable number of times. The use of this apparatus was actually suggested by Mr. Bergler, of the x-ray department of Cleveland City Hospital, and was adopted from

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