| CPC A61M 60/135 (2021.01) [A61M 2205/3368 (2013.01); A61M 2207/00 (2013.01)] | 20 Claims |

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1. A mandrel configured to receive a sheath assembly, the mandrel comprising:
a proximal section having a first length and a first diameter;
a first transition region disposed distal of the proximal section;
a medial section disposed distal of the first transition region and having a second length and a second diameter;
a second transition region disposed distal of the medial section; and
a distal section disposed distal of the second transition region and having a third length and a third diameter.
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