A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
A61B 17/32 (2006.01)
Patent
CA 2544817
An ultrasonic surgical blade, and an instrument, having a gain step. The blade body has, in any half wave length of the ultrasonic-surgical-blade body, a first vibration antinode, a vibration node, a second vibration antinode, and a gain step. The gain step is located between the second vibration antinode and the first vibration antinode. The gain step is spaced apart from the vibration node by a gain-step distance greater than 5% of the distance between the second vibration antinode and the first vibration antinode. The instrument includes the blade, a handpiece having an ultrasonic transducer, and an ultrasonic transmission rod whose proximal end is operatively connected to the ultrasonic transducer and whose distal end activates the blade. In one option, the first vibration antinode is the distal tip, and the gain step is located between the vibration node and the distal tip, resulting in an increased active length of the blade.
La présente invention concerne une lame chirurgicale à ultrasons et un instrument comportant un élément intermédiaire de gain. Le corps de la lame comporte, dans toute demi-longueur d'onde du corps de lame chirurgicale à ultrasons, un premier anti-noeud de vibration, un noeud de vibration, un second anti-noeud de vibration et un élément intermédiaire de gain. L'élément intermédiaire de gain est disposé entre le second anti-noeud de vibration et le premier anti-noeud de vibration. Cet élément intermédiaire de gain est séparé du noeud de vibration par une distance supérieure à 5 % de la distance entre le second anti-noeud de vibration et le premier anti-noeud de vibration. L'instrument comporte une lame, un embout à main ayant un transducteur ultrasonore, et une tige de transmission ultrasonore dont l'extrémité proximale est reliée fonctionnellement au transducteur ultrasonore et dont l'extrémité distale active la lame. Dans un mode de réalisation, le premier anti-noeud de vibration est la pointe distale, et l'élément intermédiaire de gain est disposé entre le noeud de vibration et la pointe distale, ce qui se traduit par un accroissement de la longueur active de la lame.
Houser Kevin L.
Neuenfeldt Steven K.
Stulen Foster B.
Ethicon Endo-Surgery Inc.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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