Blades with functional balance asymmetries for use with ultrasonic surgical instruments
First Claim
1. An ultrasonic surgical instrument comprising:
- an ultrasonic transmission member having a proximal end and a distal end;
an ultrasonically actuated blade attached to the distal end of the transmission member, wherein the blade comprises;
a distal end;
a proximal end attached to the transmission member at a longitudinal vibratory node point;
a curved treatment portion defining a plane of asymmetry and having an ultrasonically actuated motion in substantially a single plane; and
a clamp member supported adjacent to the blade and having an open position in which at least a portion of the clamp member is spaced from the blade and a closed position in which the clamp member is adjacent to the blade and that the motion from the closed position to the open position occurs in a plane substantially perpendicular to the plane of motion of the blade.
1 Assignment
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Accused Products
Abstract
Disclosed is an ultrasonic surgical instrument that combines end-effector geometry to best affect the multiple functions of a shears-type configuration. The shape of the blade is characterized by a radiused cut offset by some distance to form a curved geometry. The cut creates a curved surface with multiple asymmetries causing multiple imbalances within the blade. Imbalance due to the curve of the instrument is corrected by a non-functional asymmetry proximal to the functional asymmetry. Imbalance due to the asymmetric cross-section of the blade is corrected by the appropriate selection of the volume and location of material removed from a functional asymmetry. The shape of the blade in one embodiment of the present invention is characterized by two radiused cuts offset by some distance to form a curved and potentially tapered geometry. These two cuts create curved surfaces including a concave surface and a convex surface. The length of the radiused cuts affects, in part, the acoustic balancing of the transverse motion induced by the curved shape.
588 Citations
10 Claims
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1. An ultrasonic surgical instrument comprising:
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an ultrasonic transmission member having a proximal end and a distal end;
an ultrasonically actuated blade attached to the distal end of the transmission member, wherein the blade comprises;
a distal end;
a proximal end attached to the transmission member at a longitudinal vibratory node point;
a curved treatment portion defining a plane of asymmetry and having an ultrasonically actuated motion in substantially a single plane; and
a clamp member supported adjacent to the blade and having an open position in which at least a portion of the clamp member is spaced from the blade and a closed position in which the clamp member is adjacent to the blade and that the motion from the closed position to the open position occurs in a plane substantially perpendicular to the plane of motion of the blade. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An ultrasonic surgical instrument comprising a ultrasonic waveguide having a proximal end and a distal end, wherein the waveguide comprises:
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a balanced ultrasonically actuated blade positioned at the distal end of the waveguide and having an ultrasonically actuated motion in substantially a single plane, wherein the blade comprises;
a distal end;
a proximal end;
a curved treatment portion comprising a balance portion including at least one balance asymmetry, wherein the balance asymmetry is positioned to counter torque created by the curved treatment portion; and
a clamp member supported adjacent to the blade and having an open position in which at least a portion of the clamp member is spaced from the blade and a closed position in which the clamp member is adjacent to the blade and that the motion from the closed position to the open position occurs in a plane substantially perpendicular to the plane of motion of the blade.
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8. An ultrasonic surgical instrument comprising:
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a tubular sheath having a diameter, proximal end and a distal end;
an ultrasonic transmission member having a proximal end and a distal end positioned within the tubular sheath;
an ultrasonically actuated blade attached to the distal end of the transmission member and extending distally of the distal end of the tubular sheath, wherein the blade comprises;
a distal end;
a proximal end attached to the transmission member at a longitudinal vibratory node point;
a curved treatment portion defining a plane of asymmetry and having an ultrasonically actuated motion in substantially a single plane; and
a clamp member configured to subscribe an arc larger than the diameter of the tubular shaft and supported adjacent to the blade and having an open position in which at least a portion of the clamp member is spaced from the blade and a closed position in which the clamp member is adjacent to the blade and that the motion from the closed position to the open position occurs in a plane substantially perpendicular to the plane of motion of the blade. - View Dependent Claims (9, 10)
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Specification