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Catheter pump introducer systems and methods

  • US 10,105,475 B2
  • Filed: 04/15/2015
  • Issued: 10/23/2018
  • Est. Priority Date: 04/15/2014
  • Status: Active Grant
First Claim
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1. A catheter system for a catheter pump, comprising:

  • an elongate catheter body having a distal portion including an expandable cannula having an inlet and an outlet, the expandable cannula having a delivery profile and an operational profile larger than the delivery profile;

    an impeller assembly disposed in the expandable cannula and including an impeller shaft and an impeller body including one or more impeller blades, the impeller blade(s) drawing fluid into the expandable cannula when rotated in the fluid;

    a sheath having a cannula retention zone disposed over the expandable cannula and a separation zone, the cannula retention zone having a first configuration adapted to retain the expandable cannula in the delivery profile, the sheath further adapted to be advanced through a vasculature of a patient to deliver the expandable cannula to a target location within the vasculature where it is advanced distally out of the sheath; and

    a separation device disposed on the catheter system proximal of the sheath at least when the cannula retention zone of the sheath is disposed over the expandable cannula, wherein, upon advancing the expandable cannula distally out of the sheath, the separation device is adapted to separate the separation zone of the sheath into a first portion and a second portion disposed across a gap, the gap enabling the elongate catheter body to pass between the first and second portion so that the sheath can be removed from the elongate catheter body for operation of the impeller assembly.

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