Blunt tipped ultrasonic trocar
First Claim
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1. A trocar assembly comprisinga cannula comprising a cannula handle and a cannula tube extending from said cannula handle;
- an obturator comprising;
an ultrasonic transducer, a solid blunt puncturing tip and a shaft wherein said obturator is adapted to be inserted through said cannula tube; and
a housing containing said ultrasonic transducer,wherein said shaft has a proximal end coupled to said transducer and a distal end coupled to said blunt tip; and
wherein electrical energy is supplied to the transducer to cause the transducer to vibrate at a selected frequency and propagate vibrations along the shaft to the tip.
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Abstract
A blunt tipped trocar which uses ultrasonic energy in the form of vibrations to assist a user in penetrating tissue. In one embodiment of the invention, a feedback mechanism is provided which senses a variation in load on the trocar tip and adjusts the ultrasonic energy level of the vibrating tip in accordance with the load condition. Another embodiment of the invention provides a trocar with a self-contained ultrasonic generator.
1728 Citations
33 Claims
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1. A trocar assembly comprising
a cannula comprising a cannula handle and a cannula tube extending from said cannula handle; -
an obturator comprising;
an ultrasonic transducer, a solid blunt puncturing tip and a shaft wherein said obturator is adapted to be inserted through said cannula tube; anda housing containing said ultrasonic transducer, wherein said shaft has a proximal end coupled to said transducer and a distal end coupled to said blunt tip; and wherein electrical energy is supplied to the transducer to cause the transducer to vibrate at a selected frequency and propagate vibrations along the shaft to the tip. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A trocar obturator for puncturing tissue to access a location for endoscopic surgery comprising:
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an ultrasonic transducer a solid blunt puncturing tip; and a shaft having a proximal end coupled to said transducer and a distal end coupled to said blunt tip; wherein electrical energy is supplied to the transducer to cause the transducer to vibrate at a selected frequency and propagate vibrations along the shaft to the tip. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification