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Oval-shaped cardiac cannula

  • US 6,146,371 A
  • Filed: 08/10/1998
  • Issued: 11/14/2000
  • Est. Priority Date: 01/09/1997
  • Status: Expired due to Term
First Claim
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1. An improved cannula for use in conducting fluid to or from a body, the cannula comprising a cannula body having a proximal end, a distal end, a lumen extending between the proximal and distal ends, a fluid outlet formed on the proximal end and at least one fluid inlet formed adjacent the distal end, the improvement comprising:

  • a cannula body wherein the cross section of a first portion of the cannula body is non-circular and has a major cross-sectional axis and a minor cross-sectional axis, the length of the major axis being greater than the length of the minor axis and the lumen extending through said first portion of the cannula body having a cross-sectional shape the same as the cross section of the first portion of the cannula body; and

    a second portion of the cannula body which is non-circular, said second portion having a major cross-sectional axis and a minor cross-sectional axis, the length of the major axis being greater than the length of the minor axis, the major and minor axes of the first and second portions, respectively, being non-parallel.

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