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Intravascular catheter including untrasonic transducer for use in detection and aspiration of air emboli

  • US 4,354,502 A
  • Filed: 12/03/1980
  • Issued: 10/19/1982
  • Est. Priority Date: 08/28/1979
  • Status: Expired due to Term
First Claim
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1. An intravascular catheter particularly adapted for use in the detection and aspiration of air emboli in intracorporeal blood vessels, said catheter comprising:

  • (a) an elongated cylindrical tube of flexible material, said tube having a tip and having formed therein an axial aspiration lumen extending to and being open at said tip;

    (b) an ultrasonic transducer comprising a single annular, cylindrical ring of piezoelectric material carried by said tube adjacent said tip, said ultrasonic transducer when so carried providing omnidirectional transmission and reception of ultrasonic energy in a substantially planar region that extends radially outward from said ultrasonic transducer and that is oriented transversely with respect to the longitudinal axis of said tube; and

    ,(c) electrically-conductive means located in and extending along said tube, said electrically-conductive means being electrically connected with said ultrasonic transducer.

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