Ultrasonic surgical instruments with partially rotating blade and fixed pad arrangement
First Claim
Patent Images
1. An ultrasonic surgical instrument, comprising:
- a housing;
an outer sheath supported by said housing and protruding therefrom, said outer sheath having a distal blade opening therein that defines at least one cutting surface, said outer sheath having at least one suction lumen therethrough that communicates with said distal blade opening;
an ultrasonic transducer assembly supported by said housing;
a blade coupled to said ultrasonic transducer assembly and extending through said outer sheath such that a distal tip of said blade extends into said distal blade opening and wherein a tissue cutting portion thereof protrudes radially out of said distal blade opening; and
a motor supported by said housing and coupled to one of said ultrasonic transducer assembly and said outer sheath for applying rotational motion thereto such that said tissue cutting portion of said blade is brought into contact with said at least one cutting surface on said outer sheath.
4 Assignments
0 Petitions
Accused Products
Abstract
An ultrasonic surgical instrument that supports an ultrasonically excited blade and an outer sheath that can be selectively rotated relative to each other to bring a distal cutting tip of the blade into contact with at least one cutting surface formed on a distal end of the outer sheath. In some embodiments, the distal cutting tip may contact two cutting surfaces located on opposing sides of an opening in the outer sheath through which the distal cutting tip protrudes. Tissue pads may be attached to the cutting surfaces. Various embodiments also include at least one suction lumen.
-
Citations
20 Claims
-
1. An ultrasonic surgical instrument, comprising:
-
a housing; an outer sheath supported by said housing and protruding therefrom, said outer sheath having a distal blade opening therein that defines at least one cutting surface, said outer sheath having at least one suction lumen therethrough that communicates with said distal blade opening; an ultrasonic transducer assembly supported by said housing; a blade coupled to said ultrasonic transducer assembly and extending through said outer sheath such that a distal tip of said blade extends into said distal blade opening and wherein a tissue cutting portion thereof protrudes radially out of said distal blade opening; and a motor supported by said housing and coupled to one of said ultrasonic transducer assembly and said outer sheath for applying rotational motion thereto such that said tissue cutting portion of said blade is brought into contact with said at least one cutting surface on said outer sheath. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A method of cutting tissue, comprising:
-
inserting a blade of a surgical instrument into a patient wherein the blade is attached to a source of ultrasonic motion and extends through a hollow outer sheath wherein a tissue cutting tip of the blade is exposed through a blade opening in the outer sheath and wherein one of the blade and outer sheath is selectively rotatable relative to the other; positioning the blade and outer sheath such that the blade opening is adjacent to target tissue within the patient; applying suction through the outer sheath to draw target tissue into the blade opening; and an oscillating one of the blade and outer sheath relative to the other such that the tissue cutting tip of the blade contacts and traps a portion of the target tissue drawn into the blade opening between the cutting tip and a cutting surface on the outer sheath. - View Dependent Claims (15, 16)
-
-
17. An ultrasonic surgical instrument, comprising:
-
a housing; an outer sheath supported by said housing and protruding therefrom, said outer sheath having a distal blade opening therein that defines at least one cutting surface; an ultrasonic transducer assembly rotatably supported by said housing; a blade coupled to said ultrasonic transducer assembly and extending through said outer sheath such that a distal tip of said blade extends into said blade opening wherein a tissue cutting portion thereof protrudes radially out of said blade opening; a motor supported by said housing and coupled to said ultrasonic transducer assembly for applying rotational motion thereto such that said tissue cutting portion of said blade is brought into contact with said at least one cutting surface; and means for limiting an amount of torsion experienced by said tissue cutting portion of said blade when in contact with said cutting surface. - View Dependent Claims (18, 19, 20)
-
Specification