US Patent 11938278 Vascular introducer system with interlocking deflectable guiding catheter sheaths

A vascular introducer system includes a first vascular introducer having an elongated first deflectable catheter sheath defining a lumen having an interior surface with an inner diameter. A tubular insert having a polygonal cross-section is associated with the interior lumen of the first catheter sheath. The system includes a second vascular introducer having an elongated second deflectable catheter sheath defining an exterior surface with an outer diameter that is less than the inner diameter of the interior surface of the first catheter sheath.