Abstract
The experienced angiographer is presumed to know well his tools. The neophyte, however, may need guidance in the choice of catheter, contrast medium, and injection pressure. The authors have investigated flow rates through small-bore catheters with representative media, since with the increased use of the Seldinger percutaneous technic as well as the wide usage of angiography in children, the smaller caliber angiographic catheters are of great import. Flow through catheters was analyzed in the most rational fashion, namely, in grams of iodine per second. To correct another deficiency of previous studies only contrast media of low toxicity were compared. Last, a much-needed comparison of the capacities of high-pressure injectors was made. Equipment and Methods Contrast Media: The media tested were the low-viscosity Hypaque 50 per cent, medium-viscosity Renovist and Angio-Conray, and the highly viscid Hypaque 90 per cent. Other pertinent physical data for the present-day media are listed in Table I. Fifty p...
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