EP0125070A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Surgical cutting instrument
Assignee: Olympus Corp
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Filing: 1984-04-26
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Granted: —
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Expires: 2004-04-26
Abstract
Abstract A surgical cutting instrument (1) essentially comprises an outer sheath tube (4), an inner stationary tube (5) which is disposed within said outer sheath tube (4) such that the distal end of the inner tube (5) projects from the distal end of the outer sheath tube (4) and is provided with a cutting opening (8) for drawing cut tissue chips at the peripheral wall of the distal end of the innertube (5) and a sliding member (7) whch is slidably disposed between said outer sheath tube (4) and said inner tube (5) so as to open and close said cutting opening (8) and is provided with an outer cutting edge (18) which engages an inner cutting edge (9) of said cutting opening (8), on the distal end edge of the sliding member (7), whereby a body tissue is cut by axially and slidingly reciprocating said sliding member (7) to open and close said cutting opening (8) and cut tissue pieces are withdrawn from the body by suction through a suction channel (10) of the inner tube (5).
Inventors
- 👤 Yutaka Yoshida
- 👤 Shozo Hirayama
- 👤 Hiroyuki Kusunoki
- 👤 Yoshio Shishido
- 👤 Kazumasa Matsuo
- 👤 Morihide Mizumoto
- 👤 Masahiko Kato
- 👤 Tadao Hagino
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 01:22
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/320016; A61B2217/00; A61B2217/002; A61B2217/005; A61M; A61M2205/00; A61M2205/10; A61M2205/106
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
353 words
A surgical cutting instrument (1) including an inserter (3) having a cutting opening (8) adjacent to the periphery of the distal end of the inserter (3), a movable cutting member (7) provided with a cutting edge (16) which co-operates with said cutting opening (8) and a suction channel (10) which communicates with said cutting opening (8) and passes through said inserter (3), whereby a piece of tissue which is introduced into said cutting opening (8) and is cut by said cutting edge (16) is discharged by suction through said suction channel (10), characterized in that an outer sheath tube (4), which has an open distal end, is secured to a grip (2) at the proximal end of the outer sheath tube (4); in that an inner . stationary tube (5) which has a closed distal end, is disposed within said outer sheath tube (4) such that the distal end of said inner tube (5) projects from the open distal end of said outer tube (5) and is secured to said grip (2) at the proximal end of the inner tube (5); in that said cutting opening (8) is provided on the peripheral wall of said projected distal end of said inner stationary tube (5) so as to form an inner cutting edge (9) on the edge of said cutting opening; in that said cutting member is a sliding member (7) which is slidably disposed between said outer sheath tube (4) and said inner stationary tube (5) such that the distal end of said sliding member opens and closes said cutting opening (8) and which is provided with the outer cutting edge (16) which co-operates with said inner cutting edge (9) of said cutting opening (8) on the distal end edge of the sliding member; in that drive means (17) are provided for axially and slidingly reciprocating said sliding member (7) to open and close said cutting opening (8); and in that suction and discharge means (15) are connected to said inner stationary tube (5) to communicate therewith for effecting the suction operation through a suction channel (10) of said inner stationary tube (5).
Claim 2
Dependent Claim
353 words
A surgical cutting instrument (1) including an inserter (3) having a cutting opening (8) adjacent to the periphery of the distal end of the inserter (3), a movable cutting member (7) provided with a cutting edge (16) which co-operates with said cutting opening (8) and a suction channel (10) which communicates with said cutting opening (8) and passes through said inserter (3), whereby a piece of tissue which is introduced into said cutting opening (8) and is cut by said cutting edge (16) is discharged by suction through said suction channel (10), characterized in that an outer sheath tube (4), which has an open distal end, is secured to a grip (2) at the proximal end of the outer sheath tube (4); in that an inner . stationary tube (5) which has a closed distal end, is disposed within said outer sheath tube (4) such that the distal end of said inner tube (5) projects from the open distal end of said outer tube (5) and is secured to said grip (2) at the proximal end of the inner tube (5); in that said cutting opening (8) is provided on the peripheral wall of said projected distal end of said inner stationary tube (5) so as to form an inner cutting edge (9) on the edge of said cutting opening; in that said cutting member is a sliding member (7) which is slidably disposed between said outer sheath tube (4) and said inner stationary tube (5) such that the distal end of said sliding member opens and closes said cutting opening (8) and which is provided with the outer cutting edge (16) which co-operates with said inner cutting edge (9) of said cutting opening (8) on the distal end edge of the sliding member; in that drive means (17) are provided for axially and slidingly reciprocating said sliding member (7) to open and close said cutting opening (8); and in that suction and discharge means (15) are connected to said inner stationary tube (5) to communicate therewith for effecting the suction operation through a suction channel (10) of said inner stationary tube (5).
Claim 3
Dependent Claim
68 words
A surgical cutting instrument as claimed in claim 1, in which said inner stationary tube (5) has a proximal end which is fixed to a stationary member (11) which is disposed within said grip (2) so as to communicate with said suction and discharge means (15) through a communicating passage (12) provided within said stationary member (11) and a fitting (13) which is fitted into said stationary member.
Claim 4
Dependent Claim
32 words
A surgical cutting instrument as claimed in claim 1 or 2, in which said cutting opening (8) is rectangular in shape, being elongated in the axial direction of said inner tube (5).
Claim 5
Dependent Claim
32 words
A surgical cutting instrument as claimed in claim 1 or 2, in which said cutting opening (8A) is in a rectangular shape elongated in the circumferential direction of said inner tube (5).
Claim 6
Dependent Claim
35 words
A surgical cutting instrument as claimed in claim 1 or 2, in which said cutting opening (8B) is in a triangular shape whose one side is the distal end edge of said inner tube (5).
Claim 7
Dependent Claim
35 words
A surgical cutting instrument as claimed in claim 1 or 2, in which said cutting opening (8C) is in a triangular shape whose one vertex is at the distal end of said inner tube (5).
Claim 8
Dependent Claim
54 words
A surgical cutting instrument as claimed in any of claims 1 to 6, in which said sliding member (7) is formed with a tubular body and is disposed between the inner peripheral surface of said outer sheath tube (4) and the outer peripheral surface o.f said inner tube (5) in a close sliding fit.
Claim 9
Dependent Claim
123 words
A surgical cutting instrument as claimed in any of claims 1 to 7, in which said drive means (17) comprises a drive motor (18), a cylindrical rotatable cam (21) which is connected through a spline mechanism (19a, 22a) to an output shaft (19) of said motor (18) and is movable back and forth while rotating through a cam mechanism (20, 23), a slidable shaft (25) in a forked shape whose proximal end is journalled in said cylindrical cam (21) so as to be axially slidable with said cylindrical cam (21) while permitting the latter to be rotated and a slidable attachment (27) to which said slidable shaft (25) is fixed and which is fixed to the proximal end of said sliding member (7).
Claim 10
Dependent Claim
58 words
A surgical cutting instrument as claimed in claim 8, in which said cam mechanism comprises a cam groove (20) in a spiral form which is provided on the outer peripheral surface of said cylindrical cam (21) and a cam guide pin (23) which is fixedly provided on said grip (2) and is fitted into said cam groove (20).
Claim 11
Dependent Claim
43 words
A surgical cutting instrument as claimed in claim 8 or 9, in which said slidable shaft (25) has forked stems (25a) passing through through-holes (26) which are provided in said stationary member (11) such that said slidable shaft (25) is prevented from rotating.
References Cited (Backward Citations)
No citation records indexed.
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