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Aortic cannula

  • US 4,643,712 A
  • Filed: 10/18/1985
  • Issued: 02/17/1987
  • Est. Priority Date: 10/18/1985
  • Status: Expired due to Fees
First Claim
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1. An aortic cannula for return of blood to a patient during extracorporeal circulation, said cannula comprising:

  • a head shaped as an oblate cone and including a front end adapted to be inserted into an aorta and being elliptical in cross-section and further including a base being circular in cross-section, said head flaring outwardly in a direction from said front end towards said base, a ratio between the lengths of a greater axis and a lesser axis of said elliptical front end decreases in a direction from said front end towards said base;

    a blood flow divider mounted on said base and having a pointed shape, a pointed end of said divider facing opposite to the direction of blood flow in said cannula;

    a tube communicating with said base and adapted for blood supply to said base, said tube having perforations staggered along a portion immediately adjacent to said base and including some perforations located opposite to said blood flow divider; and

    a sleeve slidably fitted on said tube, the length of said sleeve being greater than said portion of said tube which includes said perforations so that said sleeve moved between a first position covering said perforations and a second position uncovering said perforations.

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