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Intravascular imaging apparatus and methods for use and manufacture

  • US 5,438,997 A
  • Filed: 06/08/1992
  • Issued: 08/08/1995
  • Est. Priority Date: 03/13/1991
  • Status: Expired due to Term
First Claim
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1. A drive cable for use in an imaging device for ultrasonic imaging of small vessels of a patient'"'"'s body, the imaging device having an elongate member with a distal end positionable within a small vessel of the patient'"'"'s body and a proximal end positionable outside the body, a transducer located at a distal end of the elongate member and operable to scan the vessel walls, the drive cable being electrically connected to a proximal end of the transducer for conducting pulses to and from the transducer, a signal processor operable to send and receive electrical signals to and from said transducer, the drive cable being electrically connected to the signal processor for conducting pulses to and from the signal processor, and the drive cable further comprising:

  • a rotatable outer layered coil assembly;

    a core wire located inside of said layered coil assembly and connected thereto for rotation therewith andwherein said outer layered coil assembly further comprises a plurality of coaxial coil layers around said core wirewherein said plurality of coaxial coil layers comprises three coaxial coil layers around said core wire.

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