Ultrasonic torsional tissue dissection utilizing subaltern modes of longitudinal-torsional resonantors
OwnerDavid Wuchinichinventor
Life of this patent
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Abstract
A TL/T tip is made by scaling down the dimensions of an L/T tip by the ratio of the TL/T frequency to the L/T frequency so that the TL/T tip can operate by excitement from a transducer at the same frequency that would have produced L/T motion in the L/T tip. A reductive resonator may be included between the transducer and the TL/T tip.
Claims17
In a method of forming an ultrasonic tissue dissection instrument which includes a transducer connected to a tip having a resonator for producing exciting extensional motion in the resonator and producing motion in the terminus of the tip, the improvement being in selecting as a comparison tip a tip which is capable of producing L/T motion when operated by a transducer at a specified frequency and capable of being operated in a subaltern mode when operated by a transducer at a frequency substantially lower than the specified frequency, forming an TL/T tip by using for the length and lateral dimensions reduced dimensions which are scaled down from the length and lateral dimensions of the comparison tip by a ratio of the subaltern frequency to the L/T frequency, and creating TL/T motion in the TL/T tip by operating the transducer at the same specified frequency which would have produced L/T motion in the comparison tip.
In a method of forming an ultrasonic tissue dissection instrument which includes a transducer connected to a tip having a resonator and a tissue dissection terminus whereby extensional motion is excited by the transducer and motion is produced at the terminus, the improvement being in inserting as the resonator a reductive resonator between the transducer and the tip, and the reductive resonator and the tip being resonant at the same frequency as the frequency of the transducer.
15-18. (canceled)
Dependencies are inferred from the claim text.