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Delivery catheter system with micro and macro movement control

  • US 9,144,494 B2
  • Filed: 05/11/2012
  • Issued: 09/29/2015
  • Est. Priority Date: 05/12/2011
  • Status: Active Grant
First Claim
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1. A delivery system for percutaneous delivery of an expandable prosthetic heart valve, as such a prosthetic heart valve is to be collapsed and loaded onto a distal deployment portion of the delivery system, the delivery system comprising:

  • an elongate catheter portion that extends from a proximal end to a distal end and that includes a first shaft with an axial lumen and a second shaft within the lumen of the first shaft;

    a deployment portion at a distal end of the delivery system that is operatively connected with the catheter portion and comprises a plunger attached to the second shaft of the catheter portion and a sheath connected with the first shaft of the catheter portion, wherein relative movement between the first and second shafts also provides relative movement between the plunger and the sheath so that a valve supporting portion of the plunger can be effectively covered and uncovered by the sheath;

    a control handle portion at a proximal end of the delivery system and comprising a micro-control actuator that is operatively connected to the first shaft and is configured to advance and retract along a screw shaft that is operatively connected with the second shaft so that translation of the micro-control actuator along the screw shaft by rotation of the micro-control actuator translates the sheath relative to the plunger in a controlled micro-adjustment manner, wherein the micro-control actuator is releasable from the screw shaft so that the micro-control actuator can be translated along the screw shaft without rotation of the micro-control actuator in a controlled macro-adjustment manner; and

    a tip retractor disposed proximal of the control handle portion and releasably attached to the screw shaft, wherein the second shaft is connected to the tip retractor, wherein the tip retractor includes a first configuration wherein the tip retractor is attached to the screw shaft such that the second shaft does not move relative to the screw shaft and a second configuration wherein the tip retractor is released from the screw shaft such that the tip retractor, the second shaft and the plunger can be moved relative to the screw shaft.

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