Surgery – Instruments – Cutting – puncturing or piercing
Reexamination Certificate
2007-11-27
2007-11-27
Philogene, Pedro (Department: 3733)
Surgery
Instruments
Cutting, puncturing or piercing
Reexamination Certificate
active
09909557
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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International Standard IEC 61847, First edition Jan. 1998, Ultrasonics—Surgical Systems “Measurement and declaration of the basic output characteristics” © IEC 1998.
Ethicon Endo-Surgery Inc.
Kreger, Jr. Verne
Philogene Pedro
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