EP0174084A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Surgical instrument
Assignee: Surgical Dynamics Inc
•
Filing: 1985-07-23
•
Granted: —
•
Expires: 2005-07-23
Abstract
Abstract A surgical instrument, in particular for percutaneous disectomy, includes a hollow elongate blunt needle (16) having a port (48) in its wall adjacent its tip (46). A hollow tubular cutting member (42) is situated within the needle and has an outwardly flared cutting edge (44). The interior of the cutting member (42) is connected, in use, to a source of suction and it is positioned within the needle such that the cutting edge contacts the internal surface of the needle. The interior of the needle communicates with the interior of the cutting member adjacent the port (48). The wall of the cutting member (42) is spaced from the wall of the needle (16). In use, the annular space defined between the needle (16) and the cutting member is slid longitudinally to sever tissue which is sucked in through the port (48), which tissue is then removed through the interior of the cutting member by suction and/or irrigating fluid.
Inventors
- 👤 Gary Onik
- 👤 Leonard Ginsburg
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 08:20
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/320016; A61B17/32002; A61B17/00234; A61B2017/00238; A61B2017/00261; A61B17/28; A61B17/29; A61B2017/2901; A61B2017/2905
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
266 words
A surgical instrument comprising: a first elongated tubular wall member defining a first central bore, and having a port formed in a forward portion of its wall; a second elongated tubular wall member defining a second central bore sized to permit passage of tissue therethrough when said second tubular member is connected to a source of suction, said second tubular member having a cutting edge positioned radially outwardly therefrom; said second tubular member being positioned within said first tubular member with said cutting edge being in contact with the wall of said first central bore, the portion of said first central bore adjacent said port communicating with and constituting an extension of said second central bore; the wall of said second tubular member spaced inwardly from the wall of said first tubular member to define the opposing walls of an annular passageway adapted to be connected to a source of irrigating fluid; said second tubular member being disposed for movement within said first tubular member to cause said cutting edge to move from a first position where tissue is drawn through said port into said first central bore under suction to a second position where the tissue is severed and received in said second central bore; said second tubular member having an opening formed in its wall adjacent its cutting edge to provide communication between said annular passageway separating said first and second tubular members and said second central bore to permit the passage of irrigating fluid therebetween; whereby the severed tissue is evacuated through said second central bore with the aid of the irrigating fluid.
Claim 2
Dependent Claim
266 words
A surgical instrument comprising: a first elongated tubular wall member defining a first central bore, and having a port formed in a forward portion of its wall; a second elongated tubular wall member defining a second central bore sized to permit passage of tissue therethrough when said second tubular member is connected to a source of suction, said second tubular member having a cutting edge positioned radially outwardly therefrom; said second tubular member being positioned within said first tubular member with said cutting edge being in contact with the wall of said first central bore, the portion of said first central bore adjacent said port communicating with and constituting an extension of said second central bore; the wall of said second tubular member spaced inwardly from the wall of said first tubular member to define the opposing walls of an annular passageway adapted to be connected to a source of irrigating fluid; said second tubular member being disposed for movement within said first tubular member to cause said cutting edge to move from a first position where tissue is drawn through said port into said first central bore under suction to a second position where the tissue is severed and received in said second central bore; said second tubular member having an opening formed in its wall adjacent its cutting edge to provide communication between said annular passageway separating said first and second tubular members and said second central bore to permit the passage of irrigating fluid therebetween; whereby the severed tissue is evacuated through said second central bore with the aid of the irrigating fluid.
Claim 3
Dependent Claim
43 words
The surgical instrument of Claim 1 wherein said second tubular member constitutes the sole tubular member within the forward portion of said first tubular member, whereby said annular passageway constitutes the sole annular passageway within said forward portion of said first tubular member.
Claim 4
Dependent Claim
55 words
The surgical instrument of Claims 1 or 2 wherein the wall of said first tubular member defines a wall of said annular passageway and the wall of said second tubular member define the opposed wall of said annular passageway, said wall of said second tubular member also defining the wall of said second central bore.
Claim 5
Dependent Claim
29 words
The surgical instrument of any one of the preceding claims further comprising means for moving the cutting edge of said second tubular member between its first and second positions.
Claim 6
Dependent Claim
35 words
The surgical instrument of any one of the preceding claims further comprising means for providing the irrigating fluid to said annular passageway, and means for providing the source of suction to said second tubular member.
Claim 7
Dependent Claim
38 words
The surgical instrument of any one of the preceding claims wherein the flow of irrigating fluid is off when said cutting edge is in its first position and on when said cutting edge is in its second position.
Claim 8
Dependent Claim
45 words
The surgical instrument of any one of the preceding claims further comprising a cannula having a curved segment, said cannula adapted to receive said first tubular member, said first and second tubular members being sufficiently flexible to fit within the curved segment of said cannula.
Claim 9
Dependent Claim
18 words
The surgical instrument of any one of the preceding claims wherein said instrument is a percutaneous discectomy device.
Claim 10
Dependent Claim
225 words
A percutaneous discectomy surgical instrument comprising: a first elongated tubular wall member defining a first central bore, and having a port formed in a forward portion of its wall; a second elongated tubular wall member defining a second central bore sized to permit passage of tissue therethrough when said second tubular member is connected to a source of suction, said second tubular member having a cutting edge positioned radially outwardly therefrom; said second tubular member being positioned within said first tubular member with said cutting edge being in contact with the wall of said first central bore, the portion of said first central bore adjacent said port communicating with and constituting an extension of said second central bore; a third elongated tubular member positioned in said second central bore and defining a passageway adapted to be connected to a source of irrigating fluid, said passageway being in communication with said second central bore; said second tubular member being disposed for movement within said first tubular member to cause said cutting edge to move from a first position where tissue is drawn through said port into said first central bore under suction to a second position where the tissue is severed and received in said second central bore; whereby the severed tissue is evacuated through said second central bore with the aid of the irrigating fluid.
Claim 11
Dependent Claim
225 words
A percutaneous discectomy surgical instrument comprising: a first elongated tubular wall member defining a first central bore, and having a port formed in a forward portion of its wall; a second elongated tubular wall member defining a second central bore sized to permit passage of tissue therethrough when said second tubular member is connected to a source of suction, said second tubular member having a cutting edge positioned radially outwardly therefrom; said second tubular member being positioned within said first tubular member with said cutting edge being in contact with the wall of said first central bore, the portion of said first central bore adjacent said port communicating with and constituting an extension of said second central bore; a third elongated tubular member positioned in said second central bore and defining a passageway adapted to be connected to a source of irrigating fluid, said passageway being in communication with said second central bore; said second tubular member being disposed for movement within said first tubular member to cause said cutting edge to move from a first position where tissue is drawn through said port into said first central bore under suction to a second position where the tissue is severed and received in said second central bore; whereby the severed tissue is evacuated through said second central bore with the aid of the irrigating fluid.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.