Patent US2953693A successfully refreshed from Google Patents.
US4240431A
Expired / Lapsed
US
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Laser knife
Assignee: Olympus Corp
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Filing: 1978-05-04
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Granted: 1980-12-23
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Expires: 1998-05-04
Abstract
Abstract A laser knife includes a tubular member adapted to be inserted into the coeloma by being inserted into the forceps channel of an endoscope, a pair of oppositely located laser radiation emitter and acceptor members on the distal end of the tubular member, a laser radiation receiving element disposed on the acceptor for accepting laser radiation which is used for purpose of cautery subsequent to the completion thereof and performing a photoelectric conversion of such radiation, a laser radiation transmission member for transmitting laser radiation to the emitter, and a laser radiation isolator interposed between the transmission member and a laser oscillator and responsive to a laser radiation accept signal from the element for interrupting the supply of laser radiation into the transmission member. In this manner, unwanted irradiation of normal tissues with the laser radiation is automatically terminated after a desired affected part has been cauterized.
Inventors
- 👤 Osamu Komiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:49
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/18; A61B18/20; A61B18/22; B; B23; B23K; B23K26/00; B23K26/0006; B23K26/02; B23K26/03; A61B2018/00571; A61B2018/00595; A61B2018/00625; A61B2018/00636; A61B2018/00982; B23K2103/00; B23K2103/30
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
170 words
A laser knife comprising a tubular member adapted to be inserted into the forceps channel of an endoscope, a laser radiation transmission member having a first end and a second end, said laser radiation transmission member being disposed within said tubular member for conveying laser radiation therethrough so that laser radiation can be conveyed from said first end of said laser radiation transmission member to be emitted from said second end of said laser radiation transmission member, means for supplying laser radiation of a power sufficient to vaporize human tissue to said first end of said transmission member, acceptor means for accepting said laser radiation emitted from said second end of said laser radiation transmission member upon completion of cautery of an affected part achieved by said laser radiation, and for producing an electrical signal in response to said laser radiation, and laser control means for terminating the transmission of said laser radiation through said laser radiation transmission member in response to said electrical signal produced by said acceptor means.
Claim 2
Dependent Claim
170 words
A laser knife comprising a tubular member adapted to be inserted into the forceps channel of an endoscope, a laser radiation transmission member having a first end and a second end, said laser radiation transmission member being disposed within said tubular member for conveying laser radiation therethrough so that laser radiation can be conveyed from said first end of said laser radiation transmission member to be emitted from said second end of said laser radiation transmission member, means for supplying laser radiation of a power sufficient to vaporize human tissue to said first end of said transmission member, acceptor means for accepting said laser radiation emitted from said second end of said laser radiation transmission member upon completion of cautery of an affected part achieved by said laser radiation, and for producing an electrical signal in response to said laser radiation, and laser control means for terminating the transmission of said laser radiation through said laser radiation transmission member in response to said electrical signal produced by said acceptor means.
Claim 3
Dependent Claim
82 words
The laser knife of claim 1 wherein said laser control means includes laser radiation isolation means movable between a first position in the path of said laser radiation for interrupting the flow of said laser radiation into said first end of said laser radiation transmission member and a second position outside of the path of said laser radiation, said laser radiation isolation means being movable between said first and second portions in response to said electrical signal produced by said acceptor means.
Claim 4
Dependent Claim
15 words
The laser knife of claim 2 wherein said laser radiation isolation means comprises mirror means.
Claim 5
Dependent Claim
25 words
The laser knife of claim 1 wherein said acceptor means is disposed in opposing relation to said second end of said laser radiation transmission member.
Claim 6
Dependent Claim
23 words
The laser knife of claim 1 wherein said means for supplying laser radiation to said laser radiation transmission member is a laser oscillator.
Claim 7
Dependent Claim
58 words
The laser knife of claim 1 wherein said tubular member includes a non-linear end portion, said second end of said laser radiation transmission member being disposed at a first point on said non-linear end portion of said tubular member, and said acceptor means being disposed at a second point on said non-linear end portion of said tubular member.
Claim 8
Dependent Claim
53 words
The laser knife of claim 6 wherein said second point on said non-linear end portion of said tubular member is located proximate to the distal end of said tubular member and said first point on said non-linear portion of said tubular member is located distal from the distal end of said tubular member.
Claim 9
Dependent Claim
17 words
The laser knife of claim 6 wherein said non-linear end portion of said tubular member is arcuate.
Claim 10
Dependent Claim
77 words
The laser knife of claim 6 wherein said non-linear end portion of said tubular member comprises a V-shaped end portion including two ends, said second point on said non-linear end portion of said tubular member being located at one of said ends of said V-shaped portion of said tubular member and said first point on said non-linear end portion of said tubular member being located at said other end of said V-shaped portion of said tubular member.
Claim 11
Dependent Claim
86 words
The laser knife of claim 1 including retaining means axially movable within said tubular member, said retaining means including first and second holding members carried by said retaining means, said acceptor means being associated with one of said first and second holding members, said first and second holding members being biased into distal positions with respect to each other whereby said first and second holding members can operate as holders for holding said affected part therebetween when said retainer means is inserted into said tubular member.
Claim 12
Dependent Claim
94 words
The laser knife of claim 1 including retaining means carrying said laser radiation transmission member, said retaining means being axially movable within said tubular member so that the distance between said second end of said laser radiation transmission member and said acceptor means can be altered between proximate and distal positions by axially moving said retaining means, so that when said second end of said laser radiation transmission member and said acceptor means are in said proximate position with respect to each other they can operate as holders for holding an affected part therebetween.
Claim 13
Dependent Claim
23 words
The laser knife of claim 10 or 11 including displacing means for axially moving said retaining means with respect to said tubular member.
Claim 14
Dependent Claim
39 words
The laser knife of claim 12 wherein said displacing means includes a first arm affixed to said tubular member and a second arm affixed to said retaining means, said first and second arms being pivotally connected to each other.
Claim 15
Dependent Claim
20 words
The laser knife of claim 10 including a laser oscillator for supplying laser radiation to said laser radiation transmission means.
Claim 16
Dependent Claim
34 words
The laser knife of claim 10 wherein said acceptor means is associated with said first holding member and said second end of said laser radiation transmission member is associated with said second holding member.
Claim 17
Dependent Claim
40 words
The laser knife of claim 15 wherein said first and second holding members are adapted to move between said proximate and distal positions with respect to each other in a direction perpendicular to said axial direction of said tubular member.
Claim 18
Dependent Claim
21 words
The laser knife of claim 16 including displacing means for axially moving said retaining 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 retaining means, said first and second arms being pivotally connected to each other.
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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) | 1983-12-23 | 1984-06-23 | 1984-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-23 | 1988-06-23 | 1988-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-23 | 1992-06-23 | 1992-12-23 | $7700.00 | Window Closed / Lapsed |