Removal of tissue
First Claim
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1. Apparatus for removing tissue from a patient, comprising:
- means for ultrasonically reciprocating a tip of a handpiece having a longitudinal axis along said longitudinal axis wherein the tip is symmetrical about its longitudinal axis and has an opening extending along its longitudinal axis;
means for rotating said tip about said longitudinal axis in a first of clockwise and counterclockwise direction;
means for rotating said tip in a second of clockwise and counterclockwise direction about its longitudinal axis;
means for changing directions repeatedly between said first and second of clockwise and counterclockwise direction.
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Abstract
To reduce damage to surrounding tissue while fragmenting some tissue such as for example not damaging the capsular wall while removing the lens during cataract removal surgery or not damaging artery or vein walls during bypass surgery while freeing the artery or vein to be transplanted, an incision is made for the insertion of a handpiece tip. The tip is rotated and reciprocated ultrasonically at the same time so that tissue is fragmented by the combined motion of a fragmenting surface perpendicular to the surface and at an angle to the surface many times during a single revolution or part of a revolution.
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Citations
19 Claims
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1. Apparatus for removing tissue from a patient, comprising:
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means for ultrasonically reciprocating a tip of a handpiece having a longitudinal axis along said longitudinal axis wherein the tip is symmetrical about its longitudinal axis and has an opening extending along its longitudinal axis;
means for rotating said tip about said longitudinal axis in a first of clockwise and counterclockwise direction;
means for rotating said tip in a second of clockwise and counterclockwise direction about its longitudinal axis;
means for changing directions repeatedly between said first and second of clockwise and counterclockwise direction. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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- 8. Apparatus for removing tissue from a patient comprising means for reciprocating a tip of a handpiece ultrasonically and rotating the tip of the handpiece in more than one direction.
- 10. Apparatus for removing tissue from a patient comprising means by which a power source that energizes a handpiece may drive any of a plurality of handpieces or instruments.
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12. A method of removing tissue from a patient comprising the step of driving a cutting tip with an electrical rotational motor;
- said step of driving comprising applying a pulse having a first polarity to the electrical rotational motor to cause the tip to turn in a first direction and applying a pulse having a second polarity to the electrical rotational motor to turn the tip in a second direction.
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13. Apparatus for removing tissue from a patient comprising:
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a cuffing tip;
an electrical rotational motor connected to the cutting tip to rotate the cutting tip; and
a pulse circuit for applying pulses of different polarities to the rotational motor.
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Specification