Surgery – Instruments – Electrical application
Reexamination Certificate
2001-06-08
2003-06-10
Gibson, Roy D. (Department: 3739)
Surgery
Instruments
Electrical application
C606S041000
Reexamination Certificate
active
06575970
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to handholdable surgical devices, and more particularly to shaped scalpels.
2. Brief Description of the Related Art
Surgical lesion removal has in the past been attempted using a variety of surgical tools and techniques, some of which are specially adapted for a particular procedure. For example, large lesion removal from, e.g., the human breast, is typically attempted through an open incision using an ordinary surgical knife or scalpel. While the use of scalpels is widely accepted, they are not designed to minimize the invasiveness of the procedure. During the procedure, it is usually necessary to form an incision which is much larger than the legion which is targeted for removal, so that the surgeon can work around, under, and over the legion to remove both the entire legion and a margin of tissue surrounding the lesion. The removal of a margin of tissue around the lesion is typically indicated, to be more certain that all of the lesion has been removed by the surgical procedure.
While the practice of removing tissue adjacent to a tissue mass of interest, e.g., a malignant or benign lesion, is followed in many lumpectomy procedures, the tools provided for a surgeon to remove the tissue are not well suited for performing the procedure. Straight and sculpted blade scalpels do not assist the surgeon in making the smallest cut necessary, and often require the surgeon to essentially dig out the tissue mass. The damage to the remaining tissues can be significant, resulting in considerable postoperative pain, excessive bleeding, long recovery times, the potential for infection, the potential for depression of the tissues at the surgical site (poor cosmesis) due to the removal of excessive tissue, and surface tissue scarring which is much larger than necessary.
SUMMARY OF THE INVENTION
According to a first exemplary embodiment of the present invention, a surgical tool comprises a handle having a proximal end, a distal end, and a movable actuator, a rigid probe attached to said handle distal end, a shaft rotatably mounted to said probe, a motion transmission member connecting said movable actuator and said shaft, a cutting wire secured to said shaft, and an electrical conductor in electrical communication with said cutting wire extending proximally through said probe.
According to a second exemplary embodiment of the present invention, a process of cutting tissue in a patient comprises the steps of supplying energy to a cutting wire which is secured to a rotatable shaft, and rotating the rotatable shaft.
Still other objects, features, and attendant advantages of the present invention will become apparent to those skilled in the art from a reading of the following detailed description of embodiments constructed in accordance therewith, taken in conjunction with the accompanying drawings.
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Coudert Brothers LLP
Gibson Roy D.
SenoRx, Inc.
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