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Figure 1. A method of folding the Simmons catheter curve using the aortic arch by the looping method (Method 1). (a) The tip of the catheter is negotiated into the descending thoracic aorta with the aid of the distal curve of the catheter and a J-tipped guide wire. (b) The main loop is formed by pushing the catheter into the ascending aortic arch while the guide wire is within the catheter with the tip at the primary curve of the catheter. (c) Now the curve is formed within the ascending aorta ready to select the supra-aortic branches.
