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Anterior-posterior (a) and lateral (b) plain radiography of the lumbar spine, in vivo image (d) and artist rendering (c) of the typical unfolded fixation anchor of the Ascenda catheter. The small diameter catheter pump is hardly visible. The only reference points (a, b) are the needle connector (needle symbol), the unfolded anchor (anchor symbol), and the titanium catheter tip (catheter end symbol)
