Guidable intravascular blood pump and related methods

  • US 9,597,437 B2
  • Filed: 08/17/2016
  • Issued: 03/21/2017
  • Est. Priority Date: 09/03/1999
  • Status: Expired due to Fees
First Claim
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1. A method for providing left-heart support using an intravascular blood pump system, wherein the intravascular blood pump system comprises:

  • an intravascular blood pump adapted to be guided to a predetermined location within the circulatory system of a patient by a guide wire and configured to provide left-heart support, the intravascular blood pump comprising a rotor having a rotor hub tapering in the distal direction, at least one blade extending radially outward from the rotor hub, the rotor hub having a distal end extending distally beyond a most distal portion of the at least one blade;

    a catheter coupled to a proximal end of the intravascular blood pump, a purge lumen extending through the catheter;

    a cannula coupled to a distal end of the intravascular blood pump, one or more first ports and one or more second ports establishing fluid communication between a cannula lumen and an exterior region of the cannula, wherein at least one first port is located in proximity to the rotor and at least one second port is spaced apart from and located distal to the at least one first port; and

    an elongate lumen associated with the cannula and sized to slidably receive the guide wire and dimensioned such that the guide wire passes slidably and coaxially through the elongate lumen, the elongate lumen is sized smaller cross sectionally than the cannula lumen, both the elongate lumen and the cannula lumen not extending through the rotor hub;

    wherein the method for providing left-heart support comprises the steps ofpassing the guide wire into the patient such that a distal end of the guide wire is positioned in the left ventricle of the patient'"'"'s heart;

    placing the guide wire through both the cannula and the elongate lumen such that the guide wire extends proximally away from the intravascular blood pump, the guide wire not passing through the rotor hub or the catheter, and the guide wire extends out of the intravascular blood pump system in a distal direction through the elongate lumen;

    advancing the cannula into the patient using the guide wire and positioning the cannula across an aortic valve of the patient such that a distal end of the cannula and the at least one second port are positioned in the left ventricle and a proximal end of the cannula and the at least one first port are positioned in the aorta;

    passing purge fluid through the purge lumen to the intravascular blood pump;

    measuring pressure adjacent the intravascular blood pump; and

    spinning the rotor so as to pump blood from the patient'"'"'s heart into the at least one second port through the cannula lumen and out the at least one first port to provide left-heart support.

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