Abstract: A balanced ultrasonic surgical instrument according to the present invention includes an ultrasonic transmission rod which is connected to a blade or end effector by a balance portion, which includes first and second balance asymmetries designed to compensate for the imbalances induced by the blade.

Abstract: A balanced ultrasonic surgical instrument according to the present invention includes an ultrasonic transmission rod which is connected to a blade or end effector by a balance portion, which includes first and second balance asymmetries designed to compensate for the imbalances induced by the blade.

Abstract: A balanced ultrasonic surgical instrument according to the present invention includes an ultrasonic transmission rod which is connected to a blade or end effector by a balance portion, which includes first and second balance asymmetries designed to compensate for the imbalances induced by the blade.

Abstract: An ultrasonic surgical blade includes an ultrasonic-surgical-blade body having a longitudinal axis, a distal tip, a proximal end adapted for longitudinal ultrasonic vibrational excitation, a most-distal longitudinal vibration node, a treatment portion extending from the distal tip toward the most-distal longitudinal vibration node, and a functional asymmetry. The functional asymmetry is asymmetric about the longitudinal axis and translates longitudinal ultrasonic vibrational movement of the proximal end into a combination of a longitudinal ultrasonic vibration and a transverse ultrasonic vibration in at least some of the treatment portion of the ultrasonic-surgical-blade body. An amplitude of the transverse ultrasonic vibration at the distal tip is less than substantially ten percent of a maximum amplitude of the transverse ultrasonic vibration of the treatment portion of the ultrasonic-surgical-blade body.

Abstract: A balanced ultrasonic surgical instrument according to the present invention includes an ultrasonic transmission rod which is connected to a blade or end effector by a balance portion, which includes first and second balance asymmetries designed to compensate for the imbalances induced by the blade.

Abstract: A balanced ultrasonic surgical instrument according to the present invention includes an ultrasonic transmission rod which is connected to a blade or end effector by a balance portion, which includes first and second balance asymmetries designed to compensate for the imbalances induced by the blade.

Abstract: An ultrasonic surgical blade includes an ultrasonic-surgical-blade body having a longitudinal axis, a distal tip, a proximal end adapted for longitudinal ultrasonic vibrational excitation, a most-distal longitudinal vibration node, a treatment portion extending from the distal tip toward the most-distal longitudinal vibration node, and a functional asymmetry. The functional asymmetry is asymmetric about the longitudinal axis and translates longitudinal ultrasonic vibrational movement of the proximal end into a combination of a longitudinal ultrasonic vibration and a transverse ultrasonic vibration in at least some of the treatment portion of the ultrasonic-surgical-blade body. An amplitude of the transverse ultrasonic vibration at the distal tip is less than substantially ten percent of a maximum amplitude of the transverse ultrasonic vibration of the treatment portion of the ultrasonic-surgical-blade body.

Abstract: A balanced ultrasonic surgical instrument according to the present invention includes an ultrasonic transmission rod which is connected to a blade or end effector by a balance portion, which includes first and second balance asymmetries designed to compensate for the imbalances induced by the blade.

Abstract: A balanced ultrasonic surgical instrument according to the present invention includes an ultrasonic transmission rod which is connected to a blade or end effector by a balance portion, which includes first and second balance asymmetries designed to compensate for the imbalances induced by the blade.

Abstract: A laminated ultrasonic waveguide and a method of fabrication thereof which comprises stamping at least two pieces of sheet stock to form stamped parts of the laminated ultrasonic waveguide. The stamped parts are then laminated together to form a laminated ultrasonic waveguide for transferring ultrasonic acoustic energy along a longitudinal axis of the laminated ultrasonic waveguide. In several disclosed embodiments, the laminated ultrasonic waveguide is part of an ultrasonic surgical instrument having an active tip end-effector which is placed in contact with tissue of a patient to couple ultrasonic energy transferred along the laminated ultrasonic waveguide to the tissue. The stamped pieces of sheet stock can also be stamped to form one or more channels extending along the length of the laminated ultrasonic waveguide. The laminated ultrasonic waveguide can also define a connector at a proximal end thereof to transfer ultrasonic energy into the laminated ultrasonic waveguide.

Abstract: A laminated ultrasonic waveguide and a method of fabrication thereof including stamping at least two pieces of sheet stock to form stamped parts of the laminated ultrasonic waveguide. The stamped parts are then laminated together to form a laminated ultrasonic waveguide for transferring ultrasonic acoustic energy along a longitudinal axis of the laminated ultrasonic waveguide. The laminated ultrasonic waveguide may be part of an ultrasonic surgical instrument having an active tip end-effector, which is placed in contact with tissue of a patient to couple ultrasonic energy transferred along the laminated ultrasonic waveguide to the tissue. The stamped pieces of sheet stock can also be stamped to form one or more channels extending along the length of the laminated ultrasonic waveguide. The laminated ultrasonic waveguide can also define a connector at a proximal end thereof to transfer ultrasonic energy into the laminated ultrasonic waveguide.

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.

Abstract: The present invention is an ultrasonic surgical instrument having an altered cross sectional area and/or stiffness of ½ wave segments of a waveguide and/or end effector. The waveguide is coupled to an ultrasonic transducer. The ½ wave segments of the waveguide or end effector comprise a number of geometries and function to extend or decrease the length of a waveguide and/or end effector without adding or removing ½ wave segments. The present invention is intended to function with conventional ultrasonic transducers at conventional frequencies.

Abstract: A curved ultrasonic waveguide, as used in an ultrasonic surgical instrument, includes two curved half-wave sections, having similar vibratory motion at their respective distal tips, which are integrally or compressively joined at the distal tips to create a single waveguide with a sharper bend radius than is conventionally possible. The resulting waveguide does not produce parasitic motion or generate excessive heat at the input or output portions of the waveguide.

Abstract: A balanced ultrasonic surgical instrument is described wherein the balanced ultrasonic surgical instrument includes an ultrasonic transmission rod and an ultrasonically actuated blade attached to the distal end of the ultrasonic transmission rod. According to the present invention, the ultrasonically actuated blade includes a treatment portion and a balance portion. The treatment portion has a functional feature such as, for example, a triangular blade which makes the treatment portion asymmetric. The balance portion includes a singular asymmetric balance feature designed and positioned to balance out any undesirable torque generated by the treatment portion. The balance portion further extends generally from a node point on the ultrasonic transmission rod to the proximal end of the treatment portion.

Abstract: A connection union and method for securing together first and second components of an ultrasonic waveguide or blade. The first and second components of the ultrasonic waveguide or blade are formed as complementary components which engage each other with a complementary fitting. Then a compressed fit over the connection union is formed by an electromagnetic metal forming operation which compressively deforms a female coupling member over the connection union. The female coupling member can comprise a separate sleeve which is compressed over the connection union by the electromagnetic metal forming operation. Alternatively, the female coupling member can comprise a terminal end of one of the first and second components which includes a longitudinally extending recess which forms an outer circumferentially extending sleeve which is compressed over the connection union by the electromagnetic metal forming operation.

Abstract: An ultrasonic device with increased efficiency as a result of substantially increased pressure uniformity across individual PZTs and through the PZT stack. Specifically, the PZT stack is uniformly compressed by way of a bolt having a head that has a surface area roughly equal to the surface area of the individual piezoelectric elements. The bolt is further combined with an aft end bell that has a reduced surface contact with the bolt head and a larger surface contact with the adjacent piezoelectric stack.

Abstract: A curved ultrasonic waveguide, as used in an ultrasonic surgical instrument, comprises two curved half-wave sections, having similar vibratory motion at their respective distal tips, which are integrally or compressively joined at the distal tips to create a single waveguide with a sharper bend radius than is conventionally possible. The resulting waveguide does not produce parasitic motion or generate excessive heat at the input or output portions of the waveguide.

Abstract: A balanced ultrasonic surgical instrument is described wherein the balanced ultrasonic surgical instrument includes an ultrasonic transmission rod and an ultrasonically actuated blade attached to the distal end of the ultrasonic transmission rod. According to the present invention, the ultrasonically actuated blade includes a treatment portion and a balance portion. The treatment portion has a functional feature such as, for example, a curved blade which makes the treatment portion asymrnetric. The balance portion includes at least first and second asymmetric balance features designed and positioned to balance out any undesirable torque generated by the treatment portion. The balance portion further extends generally from a node point on the ultrasonic transmission rod to the proximal end of the treatment portion.

Abstract: A connection union and method for securing together first and second components of an ultrasonic waveguide or blade. The first and second components of the ultrasonic waveguide or blade are formed as complementary components which engage each other with a complementary fitting. Then a compressed fit over the connection union is formed by an electromagnetic metal forming operation which compressively deforms a female coupling member over the connection union. The female coupling member can comprise a separate sleeve which is compressed over the connection union by the electromagnetic metal forming operation. Alternatively, the female coupling member can comprise a terminal end of one of the first and second components which includes a longitudinally extending recess which forms an outer circumferentially extending sleeve which is compressed over the connection union by the electromagnetic metal forming operation.