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Cannula lined with tissue in-growth material

  • US 9,750,866 B2
  • Filed: 08/05/2011
  • Issued: 09/05/2017
  • Est. Priority Date: 02/11/2010
  • Status: Active Grant
First Claim
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1. A cannula configured to move blood between a pump and a circulatory system of a patient, the cannula comprising:

  • a liner comprising an intermediate portion between a proximal portion and a distal portion and a lumen extending between the proximal and distal portions, wherein at least the intermediate portion is constructed from a tissue in-growth material adapted to contact blood flowing through the lumen configured to support the growth of endothelial cells, the proximal portion is configured for connecting to the pump and the distal portion is configured for connecting to the circulatory system;

    a jacket fully encapsulating the liner;

    an outer layer surrounding at least a part of the jacket, wherein the outer layer is constructed from the tissue in-growth material;

    wherein the outer layer has a proximal and a distal end and an intermediate portion therebetween; and

    a polymeric layer extending along a partial length of the liner and the outer layer, the polymeric layer having a first portion that extends proximally from the proximal end of the outer layer to a proximal end of the cannula and a second portion that extends distally from the distal end of the outer layer to the distal end of the cannula such that the first and second portions of the polymeric layer encapsulate the proximal and distal ends of the outer layer to prevent delamination of the outer layer from the jacket, the first and second portions of the polymeric layer further encapsulating a proximal and a distal portion of the jacket without encapsulating the intermediate portion of the outer layer.

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