Abstract
Percutaneous catheter technique is of course based on the epoch-making technique applied by Sven-Ivar Seldinger in 1953. The latest developments of interventional radiology have been made possible by this technique. Plastic needles, sheath introducers and other new devices have changed somewhat the original technique. Accordingly, the way of performing Seldinger's technique is no longer uniform. We present the manner of Seldinger's method that we think best.