Surgical cutting instrument
First Claim
1. A surgical cutting instrument comprising:
- an elongated sheath having a distal end, a proximal end, and a hollow passageway positioned longitudinally therebetween, said sheath also having an outer surface including a bevel extending longitudinally from said distal end of said sheath; and
a rigid inner elongated member rotatably positioned within and extending through said hollow passageway of said sheath, said member having an open distal end extending beyond said distal end of said sheath, a proximal end connectable to a rotary drive mechanism, and a hollow passageway extending longitudinally therethrough from said open distal end thereof for removing tissue, said member being in rotational contact with said elongated sheath about said distal and proximal ends thereof, said open distal end of said inner elongated member including a rotary cutting edge positioned circumferentially around said hollow passageway and said open distal end of said inner member for cutting through tissue when said member is rotated, said inner member having an outer surface including a predetermined radius extending longitudinally from said cutting edge and said open distal end.
1 Assignment
0 Petitions
Accused Products
Abstract
A surgical cutting instrument is disclosed for percutaneously debulking tissue through an access sheath commonly used in minimally invasive laparoscopic or endoscopic surgical procedures. The cutting instrument includes a inner rotary member tube having a cutting edge at the distal end thereof for cutting and slicing tissue. The distal end of the cutting member tube extends from the distal end of a stationary sheath which prevents tissue from wrapping around the inner cutting member tube. The inner cutting member tube includes a hollow passageway for suctioning and aspirating tissue and fluid through the tube and into a collection chamber or out through a vacuum or suction line attached thereto. The instrument further includes an outer safety shield having a rounded distal end for preventing the puncture of a surgical tissue bag or from unintentionally cutting tissue by the attending physician. The outer shield has a channel across the distal end through the hollow passageway therein for feeding tissue into the cutting edge and controlling the vacuum applied to the tissue. Vacuum or suction control ports are included at the proximal end of the inner cutting member tube and stationary sheath for also controlling the amount of vacuum or suction applied to the tissue. The surgical cutting instrument includes a control handle for grasping by the physician. A removable collection chamber is connected to a coupler connected to the stationary sheath for collecting tissue therein. The inner cutting member tube extends through the collection chamber to a drive motor or to a remotely positioned rotary drive mechanism. A vacuum line is attached to the collection chamber for drawing tissue and fluid through the inner cutting member tube and into the collection chamber.
286 Citations
17 Claims
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1. A surgical cutting instrument comprising:
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an elongated sheath having a distal end, a proximal end, and a hollow passageway positioned longitudinally therebetween, said sheath also having an outer surface including a bevel extending longitudinally from said distal end of said sheath; and a rigid inner elongated member rotatably positioned within and extending through said hollow passageway of said sheath, said member having an open distal end extending beyond said distal end of said sheath, a proximal end connectable to a rotary drive mechanism, and a hollow passageway extending longitudinally therethrough from said open distal end thereof for removing tissue, said member being in rotational contact with said elongated sheath about said distal and proximal ends thereof, said open distal end of said inner elongated member including a rotary cutting edge positioned circumferentially around said hollow passageway and said open distal end of said inner member for cutting through tissue when said member is rotated, said inner member having an outer surface including a predetermined radius extending longitudinally from said cutting edge and said open distal end. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A surgical cutting instrument comprising;
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an outer shield having a proximal end, a distal end, a hollow passageway extending longitudinally between said ends, and a recessed channel positioned about said distal end of said shield, extending laterally across said passageway, and opening exterior to an outer surface of said shield, said recessed channel having oppositely facing edges, said distal end having a predetermined puncture-resistant shape; an elongated sheath having a distal end, a proximal end, and a hollow passageway therebetween and sized for insertion into said passageway of said shield, said sheath also having an outer surface including a bevel extending longitudinally from said distal end of said sheath; and an inner elongated member rotatably positioned within said hollow passageway of said elongated sheath, said distal end of said member having a distal end positioned beyond said distal end of said sheath and including a rotary cutting edge positioned circumferentially thereabout for cutting through tissue, at least one of said oppositely facing edges of said recessed channel for feeding tissue into said cutting edge. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A surgical cutting instrument comprising:
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an outer shield having a proximal end, a distal end, and a hollow passageway extending longitudinally therebetween, said distal end having a predetermined puncture-resistant shape and a recessed access channel positioned thereabout, extending laterally across said passageway and opening exterior to an outer surface of said shield, said recessed channel having oppositely facing edges, said outer shield further including a control arm extending radially from said proximal end thereof; an elongated sheath having a distal end, a proximal end, and a hollow passageway therebetween and sized for insertion into said passageway of said shield; a control handle connected to said elongated sheath and extending radially from said sheath; an inner elongated member rotatably positioned within said hollow passageway of said elongated sheath, said member having a distal end extending beyond said distal end of said sheath, said distal end of said member including a rotary cutting edge positioned circumferentially thereabout, at least one of said oppositely facing edges of said recessed channel for feeding tissue into said cutting edge; said inner member including a first plurality of control ports positioned longitudinally therealong, extending from said passageway thereof, and opening exterior to an outside surface thereof; said sheath including a second plurality of control ports positioned longitudinally therealong, periodically communicating with said first plurality of ports when said inner member is rotated, extending from said passageway thereof, and opening exterior to an outside surface thereof; a tissue collection chamber removably connected to said control handle and said proximal end of said sheath, said inner member extending into said chamber and having an evacuation port extending from said passageway thereof and opening into said collection chamber, said collection chamber including an evacuation port and a rotary drive mechanism connected to said proximal end thereof, said rotary drive mechanism being removably connected to said inner elongated member; and a stop arm connected to said control handle and extending longitudinally along said outer shield and having a cross member positioned about a distal end thereof for limiting longitudinal movement of said outer shield with respect to said sheath.
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Specification