Rotary electrosurgical apparatus and methods thereof
First Claim
Patent Images
1. An electrosurgical instrument for removing target tissue, comprising:
- a shaft including a shaft distal end portion and a shaft proximal end portion, the shaft having a longitudinal void therein;
a tissue removal port disposed at the shaft distal end portion;
an elongate rotating member housed longitudinally within the longitudinal void of the shaft, the rotating member adapted to rotate within the shaft, the rotating member coupled to a drive motor for driving rotation of the rotating member;
a discrete active electrode disposed at the instrument distal end, the active electrode adapted to electrosurgically remove at least a portion of the target tissue via molecular dissociation of target tissue components as the rotating member rotates within the shaft;
an active electrode lead extending proximally from the active electrode and disposed internal to the shaft distal end portion; and
a return electrode disposed at the instrument distal end.
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Accused Products
Abstract
Electrosurgical systems, apparatus, and methods for the controlled removal and treatment of a target tissue. An instrument of the invention includes a rotating member housed longitudinally within a shaft, a tissue removal port disposed at the shaft distal end portion, and an active electrode disposed at the instrument distal end. The active electrode is adapted to electrosurgically remove at least a portion of the target tissue as the rotating member rotates within the shaft. According to alternative embodiments, the active electrode may be disposed on the rotating member or on the shaft.
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Citations
58 Claims
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1. An electrosurgical instrument for removing target tissue, comprising:
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a shaft including a shaft distal end portion and a shaft proximal end portion, the shaft having a longitudinal void therein;
a tissue removal port disposed at the shaft distal end portion;
an elongate rotating member housed longitudinally within the longitudinal void of the shaft, the rotating member adapted to rotate within the shaft, the rotating member coupled to a drive motor for driving rotation of the rotating member;
a discrete active electrode disposed at the instrument distal end, the active electrode adapted to electrosurgically remove at least a portion of the target tissue via molecular dissociation of target tissue components as the rotating member rotates within the shaft;
an active electrode lead extending proximally from the active electrode and disposed internal to the shaft distal end portion; and
a return electrode disposed at the instrument distal end. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 57, 58)
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10. A method for the controlled removal of a target tissue at a surgical site, comprising:
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a) providing an electrosurgical instrument, the instrument including a shaft having a shaft distal end portion, a tissue removal port disposed at the shaft distal end portion, an elongate rotating member housed longitudinally within the shaft, the rotating member adapted to rotate within the shaft, a discrete active electrode disposed at the instrument distal end, an active electrode lead extending proximally from the active electrode and disposed internal to the shaft distal end portion, and a return electrode disposed at the instrument distal end;
b) positioning the instrument distal end with respect to the target tissue such that the tissue removal port lies in at least close proximity to the target tissue;
c) driving the rotating member via a drive motor such that the rotating member rotates within the shaft; and
d) during said step c), applying a high frequency voltage between the active electrode and the return electrode, wherein the active electrode is adapted for electrosurgically removing the target tissue via molecular dissociation of target tissue components as the rotating member rotates within the shaft. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. An electrosurgical instrument for removing target tissue from a patient, comprising:
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a shaft including a shaft distal end portion and a shaft proximal end portion, the shaft having a longitudinal void therein;
an active electrode disposed on the shaft distal end portion;
a return electrode disposed on the shaft distal end portion and spaced from the active electrode;
a tissue removal port at the shaft distal end portion; and
a rotating member housed longitudinally within the longitudinal void of the shaft, the rotating member adapted to rotate within the shaft, the rotating member including a rotating member distal end, the rotating member distal end configured to traverse the tissue removal port as the rotating member rotates within the shaft, and the active electrode is adapted to remove the target tissue as the rotating member distal end traverses the tissue removal port. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. An electrosurgical system for treating a target tissue, comprising:
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an instrument which comprises;
a shaft including a shaft distal end portion and a shaft proximal end portion, the shaft having a longitudinal void therein;
a tissue removal port at the shaft distal end portion;
an elongate rotating member housed within the shaft and adapted to rotate therein, the rotating member having a distal end configured to traverse the tissue removal port as the rotating member rotates within the shaft;
an active electrode disposed at the shaft distal end portion, the active electrode adapted to electrosurgically remove a portion of the target tissue during each revolution of the rotating member; and
a return electrode disposed at the instrument distal end; and
an electrosurgical generator coupled to the instrument for applying a high frequency voltage between the active electrode and the return electrode, wherein the active electrode is adapted to electrosurgically remove at least a portion of the target tissue upon application of the high frequency voltage. - View Dependent Claims (30, 31, 32, 33, 34)
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35. A method of removing a target tissue of a patient, comprising:
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a) providing an electrosurgical instrument, the instrument including a shaft having a shaft distal end portion, the shaft distal end portion having a tissue removal port therein, the instrument further including a rotating member adapted to rotate within the shaft, and an active electrode disposed on an external surface of the shaft distal end portion adjacent the tissue removal port, the rotating member distal end adapted to guide a portion of the target tissue towards the active electrode as the rotating member rotates within the shaft;
b) positioning the shaft distal end portion in at least close proximity to the target tissue;
c) rotatively driving the rotating member such that the rotating member distal end repeatedly traverses the tissue removal port; and
d) during said step c), applying a high frequency voltage between the active electrode and a return electrode, the active electrode adapted for removing tissue upon application of the high frequency voltage between the active electrode and the return electrode, whereby the target tissue is sequentially removed as the rotating member distal end repeatedly traverses the tissue removal port. - View Dependent Claims (36, 37, 38, 39, 40)
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41. An electrosurgical instrument for removing target tissue, comprising:
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a shaft including a shaft distal end portion and a shaft proximal end portion, the shaft having a longitudinal void therein;
a tissue removal port at the shaft distal end portion;
a rotating member housed within the longitudinal void of the shaft, the rotating member adapted to rotate within the shaft;
an electrode support extending distally from the rotating member distal end; and
an active electrode affixed to a distal end of the electrode support, the active electrode configured to traverse the tissue removal port as the rotating member rotates within the shaft, and the active electrode adapted to electrosurgically remove at least a portion of the target tissue as the active electrode traverses the tissue removal port. - View Dependent Claims (42, 43)
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44. An electrosurgical instrument for removing target tissue, comprising:
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a shaft including a shaft distal end portion and a shaft proximal end portion, the shaft having a longitudinal void therein;
a tissue removal port arranged laterally on the shaft distal end portion;
a rotating member housed within the longitudinal void of the shaft, the rotating member adapted to rotate within the shaft, the rotating member including a rotating member distal end; and
an active electrode extending distally from the rotating member distal end, the active electrode configured to traverse the tissue removal port when the rotating member rotates within the shaft, the active electrode adapted to electrosurgically remove at least a portion of the target tissue via molecular dissociation of target tissue components as the active electrode traverses the tissue removal port. - View Dependent Claims (45, 46, 47, 48)
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49. An electrosurgical instrument for removing target tissue, comprising:
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a shaft including a shaft distal end portion and a shaft proximal end portion, the shaft having a longitudinal void therein;
a tissue removal port arranged laterally on the shaft distal end portion;
a rotating member housed within the longitudinal void of the shaft, the rotating member adapted to rotate within the shaft, the rotating member having a non-circular cross-section and including at least one longitudinal edge; and
an active electrode disposed on the at least one longitudinal edge at the rotating member distal end, the active electrode configured to traverse the tissue removal port when the rotating member rotates within the shaft, and the active electrode adapted to electrosurgically remove at least a portion of the target tissue as the active electrode traverses the tissue removal port. - View Dependent Claims (50, 51, 52)
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53. A method of removing a target tissue at a surgical site, comprising:
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a) providing an electrosurgical instrument, the instrument including an outer shaft having a tissue removal port at the shaft distal end, an inner rotating member adapted to rotate within the shaft, an active electrode disposed at the rotating member distal end, the active electrode configured such that at least a portion of the active electrode traverses the tissue removal port as the rotating member rotates within the shaft, and a return electrode disposed at the instrument distal end;
b) positioning the instrument distal end with respect to the target tissue such that the tissue removal port lies in at least close proximity to the target tissue;
c) driving the rotating member such that the rotating member rotates within the shaft; and
d) during said step c), applying a high frequency voltage between the active electrode and the return electrode, wherein the active electrode is adapted for electrosurgically removing the target tissue via molecular dissociation of target tissue components as the active electrode traverses the tissue removal port. - View Dependent Claims (54, 55, 56)
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Specification