Patent ID: 6270471
Filing Date: 2001-08-07
Classification: A61B

Abstract:
An ultrasonic surgical probe having an ultrasonically isolated, low stress shaped surrounding cannula, comprising:a. an axially elongated hollow member having a circular cross-section and a proximal end portion adapted to receive ultrasonic vibrations, said member having a distal end which is open-ended and perpendicular to the axis of the member, said member defining a marginal distal end portion thereof adjacent said distal end, said member adapted to receive ultrasonic vibrations at said proximal end and to transmit ultrasonic vibrations from said marginal distal end portion, and adapted to receive and transmit fluid and tissue therethrough; andb. a coaxially positioned cannula surrounding said elongated member, extending beyond the distal end of said member, and isolated from the transmission of ultrasonic vibrations to said member and spaced from said member, said cannula defining a distal end portion, and said distal end portion of said cannula at least partially surrounding the distal end of said member and defining an opening adjacent the distal end of said member.