US4249533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser knife
Assignee: Olympus Corp
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Filing: 1978-05-04
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Granted: 1981-02-10
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Expires: 1998-05-04
Abstract
Abstract A laser knife comprises a tubular member adapted to be passed through a forceps channel of an endoscope for insertion into a coeloma, holders disposed at the distal end of the tubular member for holding an affected part within the coeloma which is to be cauterized, a laser radiation transmission member for irradiating the affected part held by the holders with radiation from a laser, and a pad on the holders for accepting the laser radiation subsequent to the completion of the cautery, thus preventing the irradiation of normal tissues with the laser radiation.
Inventors
- 👤 Osamu Komiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:04
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/18; A61B18/20; A61B18/22; A61B18/04; A61B18/08; A61B18/082; A61B18/085; A61B90/00; A61B90/04; B; B23; B23K; B23K26/00; B23K26/02; A61B2018/00571; A61B2018/00595; A61B2018/00607; A61B2018/00982; A61B2018/2205; A61B2018/2211
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
273 words
A laser knife comprising a tubular member adapted to be inserted into the forceps channel of an endoscope, first means for generating laser radiation sufficient to cauterize tissue, a laser radiation transmission member having a first end and a second end, said laser radiation transmission member being disposed within said tubular member and extending along the length thereof for conveying laser radiation therethrough so that laser radiation derived from said first means is conveyed from said first end of said laser radiation transmission member to be emitted from said second end of said laser radiation transmission member, holding means located at said second end of said laser radiation transmission member for holding an affected part to be cauterized by said emitted laser radiation, said holding means including a pair of opposed holding members which are movable relative to one another; means for moving at least one of said holding members relative to the other between a first position and a second position, said first position adapted to hold said affected part and said second position adapted to release said affected part, and acceptor means being positioned on one of said holding members such that said acceptor means is moved by said one of said holding members to a position disposed in optical alignment with said second end of said laser radiation transmission member when said holding members are moved to said first position from said second position for accepting said laser radiation emitted from said second end of said laser radiation transmission member upon completion of cautery of said affected part to prevent the likelihood of irradiating normal tissue with the laser radiation.
Claim 2
Dependent Claim
273 words
A laser knife comprising a tubular member adapted to be inserted into the forceps channel of an endoscope, first means for generating laser radiation sufficient to cauterize tissue, a laser radiation transmission member having a first end and a second end, said laser radiation transmission member being disposed within said tubular member and extending along the length thereof for conveying laser radiation therethrough so that laser radiation derived from said first means is conveyed from said first end of said laser radiation transmission member to be emitted from said second end of said laser radiation transmission member, holding means located at said second end of said laser radiation transmission member for holding an affected part to be cauterized by said emitted laser radiation, said holding means including a pair of opposed holding members which are movable relative to one another; means for moving at least one of said holding members relative to the other between a first position and a second position, said first position adapted to hold said affected part and said second position adapted to release said affected part, and acceptor means being positioned on one of said holding members such that said acceptor means is moved by said one of said holding members to a position disposed in optical alignment with said second end of said laser radiation transmission member when said holding members are moved to said first position from said second position for accepting said laser radiation emitted from said second end of said laser radiation transmission member upon completion of cautery of said affected part to prevent the likelihood of irradiating normal tissue with the laser radiation.
Claim 3
Dependent Claim
31 words
The laser knife of claim 1 wherein said one of said holding members includes an end portion and said acceptor means comprises a laser radiation pad formed at said end portion.
Claim 4
Dependent Claim
68 words
The laser knife of claim 1 wherein said holding means is axially movable within said tubular member between said first and second positions, said holding members comprising first and second arms resiliently biased apart and being axially movable relative to said tubular member so that when said holding means is axially moved to said first position said tubular member urges said first and second arms towards each other.
Claim 5
Dependent Claim
35 words
The laser knife of claim 3 wherein said holding means is mounted on said second end of said laser radiation transmission member, and said laser radiation transmission member is axially movable within said tubular member.
Claim 6
Dependent Claim
24 words
The laser knife of claim 3 including retaining means axially movable within said tubular member, said holding means being mounted on said retaining means.
Claim 7
Dependent Claim
48 words
The laser knife of claim 3 including operating means for axially moving said holding means within said tubular member, said tubular member urging said first and second arms towards each other against said resilient bias when said holding means moves in a predetermined direction within said tubular member.
Claim 8
Dependent Claim
33 words
The laser knife of claim 3 wherein said first and second arms include end portions, and said acceptor means comprises laser radiation pads formed at said ends of said first and second arms.
Claim 9
Dependent Claim
24 words
The laser knife of claim 7 wherein said laser radiation pads are formed by inwardly folding said ends of said first and second arms.
Claim 10
Dependent Claim
44 words
The laser knife of claim 8 wherein said laser radiation pads substantially overlap each other at a location which is in optical alignment with said second end of said laser radiation transmission member when said first and second arms are holding an affected part.
Claim 11
Dependent Claim
29 words
The laser knife of claim 3 wherein said means for moving said opposed members comprises displacing means for axially moving said holding means with respect to said tubular member.
Claim 12
Dependent Claim
39 words
The laser knife of claim 10 wherein said displacing means includes a first arm affixed to said tubular member and a second arm affixed to said holding means, said first and second arms being pivotally connected to each other.
Claim 13
Dependent Claim
24 words
The laser knife of claim 3 wherein said first arm supports said laser radiation transmission member and said second arm supports said acceptor means.
Claim 14
Dependent Claim
41 words
The laser knife of claim 12 wherein the free end of said first arm is bent to extend toward said second arm, the second end of said laser radiation transmission member being supported by the free end of said first arm.
Claim 15
Dependent Claim
33 words
The laser knife of claim 1 wherein said holding means is formed from a cylindrical body; said opposed members comprising a pair of arms joined to said cylindrical body at one end thereof.
Claim 16
Dependent Claim
19 words
The laser knife of claim 1 wherein said laser radiation transmission means comprises a plurality of fiber optic members.
Claim 17
Dependent Claim
71 words
The laser knife of claim 1 wherein one of said holding members comprises retainer means carrying said laser radiation transmission member, said retainer means being axially movable within said tubular member between said first and second positions in said tubular member so that when said holding members are in said first position, said affected part is positioned between said second end of said laser radiation transmission member and said acceptor means.
Claim 18
Dependent Claim
30 words
The laser knife of claim 16 wherein said means for moving said opposed members includes / displacing means for axially moving said retainer means with respect to said tubular member.
Claim 19
Dependent Claim
39 words
The laser knife of claim 17 wherein said displacing means includes a first arm affixed to said tubular member and a second arm affixed to said retainer means, said first and second arms being pivotally connected to each other.
Claim 20
Dependent Claim
15 words
The laser knife of claim 16 wherein said retainer means also carries said acceptor means.
Claim 21
Dependent Claim
24 words
The laser knife of claim 16 wherein said second end of said laser radiation transmission member and said acceptor means include correspondingly mating surfaces.
Claim 22
Dependent Claim
16 words
The laser knife of claim 20 wherein said correspondingly mating surfaces comprise convex and concave surfaces.
Claim 23
Dependent Claim
42 words
The laser knife of claim 1 wherein said acceptor means comprises a planar surface which is disposed substantially parallel to said second end of said laser radiation transmission means when said holding means is in said first position holding an affected part.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-10 | 1984-08-11 | 1985-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-10 | 1988-08-11 | 1989-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-10 | 1992-08-11 | 1993-02-10 | $7700.00 | Window Closed / Lapsed |