Curved ultrasonic blade having a trapezoidal cross section
First Claim
1. A curved ultrasonic surgical blade, wherein said curved ultrasonic blade comprises:
- a concave top surface including a central ridge;
a convex bottom surface wherein said convex bottom surface has a width greater than twice the width of said central ridge; and
first and second side walls connecting said convex bottom surface to said central ridge, said first and second side walls forming a portion of said concave top surface.
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Accused Products
Abstract
A curved ultrasonic blade including a concave top surface, a convex bottom surface and a central ridge running along the concave top surface is described. In a curved blade according to the present invention the blade has a cross section which is substantially trapezoidal. The blade edges may be sharp or blunt and the convex bottom surface has a width of at least two times the width of the central ridge and, preferably, three times the width of the central ridge. A balanced ultrasonic instrument including a curved blade having a trapezoidal cross section is also described. A balanced ultrasonic surgical instrument according to the present invention includes an ultrasonic transmission rod which is connected to the curved blade by a balance portion which includes first and second balance asymmetries designed to compensate for the imbalances induced by asymmetry of the curved blade.
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Citations
20 Claims
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1. A curved ultrasonic surgical blade, wherein said curved ultrasonic blade comprises:
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a concave top surface including a central ridge;
a convex bottom surface wherein said convex bottom surface has a width greater than twice the width of said central ridge; and
first and second side walls connecting said convex bottom surface to said central ridge, said first and second side walls forming a portion of said concave top surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A balanced ultrasonic surgical instrument including a curved ultrasonic surgical blade, wherein said ultrasonic surgical instrument comprises:
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an ultrasonic transmission rod having a proximal end and a distal end;
a balance region including first and second balance asymmetries wherein said balance region extends from a node point at said distal end of said ultrasonic transmission rod to a proximal end of said curved ultrasonic surgical blade, wherein said curved ultrasonic surgical blade comprises;
a distal end;
a proximal end connected to said balance region;
a concave top surface including a central ridge;
a convex bottom surface wherein said convex bottom surface has a width greater than twice the width of said central ridge; and
first and second side walls connecting said convex bottom surface to said central ridge, wherein said first and second side walls form a portion of said concave top surface such that said curved ultrasonic surgical blade has a substantially trapezoidal cross-section. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification