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The Probe exchange catheter.

In order to provide exchange capability to non-over-the-wire systems (i.e., Probe), an exchange catheter composed of an inner sheath catheter (.039'' external diameter) and a 4 French outer catheter was devised. The system was utilized to exchange between an over- to a non-over-the-wire system, different non-over-the-wire systems, and to provide balloon dilatation backup to the soft non-over-the-wire systems in difficult-to-engage vein graft takeoff. The system was successfully utilized in 50 patients without any related complications.