Back to results
US 9,358,030 B2Granted
Ultrasonic surgical tool
AssigneeSra Developments Limited
InventorsMichael John Radley Young, Stephen Michael Radley Young
Life of this patent
Estimating the term…
Abstract
The shaped output is for use with an ultrasonic surgical tool vibratable in torsional mode. The output has a generally cylindrical first waveguide (1) with, at a distal end a second waveguide extension member (3) of reduced diameter. The second waveguide (3) is curved in one plane from the axis of the first waveguide. It has at least two blade faces (4) extending radially outwardly from its distal end.
Claims19
An output means for use with an ultrasonic surgical tool vibratable in torsional mode, said output means comprising:
- a generally cylindrical first waveguide extending along a longitudinal axis and provided at a distal end with a generally cylindrical second waveguide extension member being curved in one plane from the longitudinal axis of the first waveguide,
- a diameter of the second waveguide extension member being less than a diameter of the first waveguide, and
- two blades extending radially from a distal end of the second waveguide extension member, wherein said two blades each comprise two pockets of part-cylindrical profile shaped so as to create, under torsional ultrasonic vibrational mode, a focussed compression wave into surrounding tissue,
- said two pockets are so disposed as to define a cutting edge of a respective blade where said two pockets meet,
- said cutting edge of each blade curves outwardly from a central longitudinal axis of the second waveguide extension member and is oriented away from the distal end of the second waveguide extension member so as to cut tissue when the output means is pulled backwardly, and the blades extend in a plane substantially orthogonal to the plane of curvature of the second waveguide extension member.
2 more elements
An output means for use with an ultrasonic surgical tool vibratable in torsional mode, said output means comprising:
- a first portion extending along a longitudinal axis and having a constant cross sectional area, provided at a distal end with a second portion having a constant cross sectional area smaller than the constant cross sectional area of the first portion,
- said second portion carrying blades at or towards a distal end of the second portion and extending from opposite sides of the second portion,
- wherein said second portion is curved towards its distal end such that the distal end of the second portion and the blades carried by the second portion do not extend from the longitudinal axis of the first portion beyond a distance equal to a radius of the first portion, and
- each blade has a cutting edge that curves outwardly from a central longitudinal axis of the second waveguide extension member and is oriented away from the distal end of the second waveguide extension member so as to cut tissue when the output means is pulled backwardly.
1 more element
An output means for use with an ultrasonic surgical tool vibratable in torsional mode, said output means comprising:
- a first portion having a constant cross sectional area provided at a distal end with a second portion having a constant cross sectional area smaller than the constant cross sectional area of the first portion,
- said second portion comprising blades at or towards a distal end of the second portion and extending from the second portion,
- wherein each of said blades comprises two pockets of part-cylindrical profile shaped so as to create, under torsional ultrasonic vibrational mode, a focused compression wave into a surrounding tissue,
- said pockets define a cutting edge of a respective blade where the two pockets meet,
- said cutting edge of each blade curves outwardly from a central longitudinal axis of the second waveguide extension member and is oriented away from the distal end of the second waveguide extension member so as to cut tissue when the output means is pulled backwardly;
- and said blades extend in a plane substantially orthogonal to a plane of curvature of said second portion.
3 more elements
An output means for use with an ultrasonic surgical tool vibratable in torsional mode, said output means comprising:
- a first portion extending along a longitudinal axis and having a constant cross sectional area provided at a distal end with a second portion having a constant cross sectional area smaller than the constant cross sectional area of the first portion,
- said second portion comprising blades at or towards a distal end of the second portion,
- wherein the blades extend in different directions and
- wherein said second portion is curved towards the distal end of the second portion such that the distal end of the second portion and the blades carried by the second portion do not extend from the longitudinal axis of the first portion beyond a distance equal to a radius of the first portion, and
- each blade has a cutting edge that curves outwardly from a central longitudinal axis of the second waveguide extension member and is oriented away from the distal end of the second waveguide extension member so as to cut tissue when the output means is pulled backwardly.
2 more elements
Dependencies are inferred from the claim text.