Tissue biopsy apparatus
First Claim
1. A surgical apparatus for removing a portion of tissue comprising an elongated body having a distal edge and a reduced diameter supporting surface having an outer surface and an inner surface, and a stationary cutting member fixedly mounted on the outer surface of the supporting surface of the elongated body, the cutting member having an opening therethrough, a first edge, a second opposing edge and a longitudinally extending wall extending between the first and second edges and extending over and along the supporting surface, the first edge extending distally of the distal edge of the elongated body member and forming an exposed conductive distal edge forming an electrosurgical cutting surface for applying electrical energy to tissue, a remaining portion of the cutting member being insulated, the cutting member resecting a tubular region of tissue as the apparatus is advanced through tissue and the resected tissue extending through the opening in the cutting member for containment within the elongated body.
1 Assignment
0 Petitions
Accused Products
Abstract
A surgical apparatus for removing a portion of tissue comprising an elongated body having a distal edge and a cutting member fixedly mounted to the elongated body and extending distally of the distal edge of the elongated body member. The cutting member has an exposed conductive distal edge forming an electrosurgical cutting surface for applying electrical energy to tissue. The cutting member resects a tubular region of tissue as the apparatus is advanced through tissue and the resected tissue extends through an opening in the cutting ring for containment within the elongated body.
169 Citations
30 Claims
- 1. A surgical apparatus for removing a portion of tissue comprising an elongated body having a distal edge and a reduced diameter supporting surface having an outer surface and an inner surface, and a stationary cutting member fixedly mounted on the outer surface of the supporting surface of the elongated body, the cutting member having an opening therethrough, a first edge, a second opposing edge and a longitudinally extending wall extending between the first and second edges and extending over and along the supporting surface, the first edge extending distally of the distal edge of the elongated body member and forming an exposed conductive distal edge forming an electrosurgical cutting surface for applying electrical energy to tissue, a remaining portion of the cutting member being insulated, the cutting member resecting a tubular region of tissue as the apparatus is advanced through tissue and the resected tissue extending through the opening in the cutting member for containment within the elongated body.
-
13. A surgical tissue biopsy system comprising:
-
an endoscope having a channel formed therein dimensioned for receiving a surgical instrument; and
a tissue biopsy apparatus insertable through the channel of the endoscope, the biopsy apparatus connectable to a generator for supplying radiofrequency energy, the biopsy apparatus having a supporting surface having an outer surface and an inner surface and having a stationary annular cutting member having a longitudinally extending wall fixedly mounted on a the outer surface of the supporting surface at a distal end portion thereof, wherein the cutting member has a distally exposed conductive cutting surface for cutting tissue as the apparatus is advanced and the cutting member is energized to apply radiofrequency energy to the tissue, an outer surface of the cutting member proximal of the exposed cutting surface being insulated by an outer member positioned over the cutting member. - View Dependent Claims (14, 15, 16)
-
- 17. A surgical apparatus for removing a portion of tissue comprising an elongated body having a first outer diameter and a longitudinally extending supporting surface of a second diameter less than the first diameter and terminating in a distal edge, a stationary cutting member having a longitudinally extending outer wall and fixedly mounted to the supporting surface of the elongated body such that the wall of the cutting member does not exceed the first diameter of the elongated member and the wall overlies the supporting surface, the cutting member further having an opening therethrough, and extending distally of the distal edge of the elongated body, an outer surface portion of the cutting member proximal of the distal edge being electrically insulated, the cutting member having an exposed conductive distal edge forming a closed loop electrosurgical cutting surface for applying electrical energy to tissue, the cutting member resecting a tubular region of tissue as the apparatus is advanced through tissue and the resected tissue extending through the opening in the cutting member for containment within the elongated body.
-
22. A method of taking a tissue biopsy comprising:
-
providing an apparatus having an elongated member and a stationary annular cutting member with a distally exposed conductive cutting surface fixedly mounted to a an outer surface of a longitudinally extending reduced diameter supporting surface of the elongated member and extending past the elongated member, a remaining outer surface portion of the cutting member proximal of the exposed cutting surface being insulated;
introducing the apparatus into the body;
applying radiofrequency energy to the cutting member such that only the distally exposed cutting surface transmits energy to tissue; and
advancing the apparatus so the fixed exposed conductive surface contacts and severs the target tissue and enables the severed tissue to be captured within an interior of the elongated member. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
-
-
30. A method of removing a large tissue sample comprising:
-
providing an apparatus having a closed loop stationary cylindrical ring electrode fixedly mounted thereto and extending distally from the apparatus, the ring electrode having a longitudinally extending wall fixedly mounted on a longitudinally extending supporting surface of an inner tube and having an outer tube positioned thereon;
applying radiofrequency energy to the fixed electrode; and
advancing the apparatus through the tissue so a distal exposed edge of the electrode severs the tissue as it is advanced to remove an elongated solid tubular tissue region while the remaining portion of the electrode remains insulated by the outer tube and does not apply electrical energy to tissue as the apparatus is advanced.
-
Specification