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Dual probe

  • US 6,875,220 B2
  • Filed: 12/30/2002
  • Issued: 04/05/2005
  • Est. Priority Date: 12/30/2002
  • Status: Expired due to Term
First Claim
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1. A percutaneous surgical instrument for de-bulking calculi or drilling bone, the instrument comprising:

  • an actuator for generating vibrations at ultrasonic frequencies;

    a horn coupled to said actuator for amplifying the actuator vibration;

    a fixed probe attached to said horn for engaging the calculi and introducing the ultrasonic frequencies thereto;

    a floating probe disposed concentric to and over said fixed probe, said floating probe being slidable over said fixed probe;

    a free mass, disposed between said horn and said floating probe for oscillating therebetween, in response to actuator vibration, for causing low frequency impact with the calculi.

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