US5312399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser resectoscope with mechanical cutting means and laser coagulating means
Assignee: Canox International Ltd
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Filing: 1992-09-29
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Granted: 1994-05-17
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Expires: 2012-09-29
Abstract
Abstract A resectoscope and a method of use for removing organic tissue, e.g., the prostate gland, from the body of a living being. The resectoscope includes an elongated member having a distal end adapted to be introduced into the body of the being at the situs of organic tissue to be removed via a tubular sheath. The resectoscope includes a laser for producing a laser beam adjacent the distal end of the elongated member to penetrate several millimeters through the surface of the tissue to coagulate. A rotatable cutter, e.g., a pair of angled offset planar blades, is disposed at the distal end of the elongated member and is arranged to be rotated at a high rate of speed by an associated drive assembly to cut the coagulated tissue. A lumen is provided to carry an irrigation liquid to the situs of the tissue. A suction lumen is provided to carry the tissue removed by the cutter so that it can be retrieved for histological examination. A viewing system is also provided and extends through the resectoscope in order to enable the operator to view the lasing and cutting of the tissue.
Inventors
- 👤 Said I. Hakky
- 👤 Perry B. Hudson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:51
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/3207; A61B17/320758; A61B18/00; A61B18/18; A61B18/20; A61B18/22; A61B18/24; A61B10/00; A61B10/02; A61B17/00234; A61B2017/00238; A61B2017/00274; A61B2017/00535; A61B2017/00553; A61B2017/00973; A61B2018/00315; A61B2018/00547; A61B2018/00982; A61B2217/00; A61B2217/002; A61B2217/005; A61B2217/007
Claims Analysis
Total Claims: 50
Claim 1
Independent Claim
152 words
A surgical apparatus for coagulating and removing tissue of a living being, said apparatus being an elongated member having a distal end portion for introduction into said being adjacent said tissue, laser directing means located at said distal end portion directing a laser beam from laser beam producing means coupled to said apparatus into said tissue for coagulating a portion of said tissue while preserving the cellular architecture thereof, thin planar rotatable cutting blade means located at said distal end portion for removing at least a portion of said coagulated tissue by cutting away particles of said portion of said coagulated tissue, and conduit means coupled to said rotatable cutting means for carrying said particles to means for retrieving said particles, said rotatable cutting means being operable to engage and cut said coagulated tissue to produce said particles, with the cellular architecture of said retrieved particles being sufficiently preserved for histological examination.
Claim 2
Dependent Claim
152 words
A surgical apparatus for coagulating and removing tissue of a living being, said apparatus being an elongated member having a distal end portion for introduction into said being adjacent said tissue, laser directing means located at said distal end portion directing a laser beam from laser beam producing means coupled to said apparatus into said tissue for coagulating a portion of said tissue while preserving the cellular architecture thereof, thin planar rotatable cutting blade means located at said distal end portion for removing at least a portion of said coagulated tissue by cutting away particles of said portion of said coagulated tissue, and conduit means coupled to said rotatable cutting means for carrying said particles to means for retrieving said particles, said rotatable cutting means being operable to engage and cut said coagulated tissue to produce said particles, with the cellular architecture of said retrieved particles being sufficiently preserved for histological examination.
Claim 3
Dependent Claim
32 words
The apparatus of claim 1 for performing a prostatectomy on a living person, wherein said elongated portion is configured for transurethral introduction to a position adjacent the prostate of said living person.
Claim 4
Dependent Claim
36 words
The apparatus of claim 2 wherein said cutting blade means comprises at least one substantially planar cutting blade, said blade being mounted at a small acute angle to an axis about which said blade is rotated.
Claim 5
Dependent Claim
34 words
The apparatus of claim 2 additionally comprising drive means for rotating said cutting blade means wherein said cutting blade means is rotated by said drive means within the range of 10,000 to 50,000 RPM.
Claim 6
Dependent Claim
17 words
The apparatus of claim 2 additionally comprising suction means to aid in the removal of said tissue.
Claim 7
Dependent Claim
20 words
The apparatus of claim 5 additionally comprising means for providing an irrigation liquid to said distal end of said apparatus.
Claim 8
Dependent Claim
46 words
The apparatus of claim 2 additionally comprising means for providing an visual image of the tissue of the prostate as said laser beam is directed to said tissue to coagulate said tissue and said cutting means is operated to removed said particles from said coagulated tissue.
Claim 9
Dependent Claim
36 words
The apparatus of claim 1 wherein said cutting blade means comprises at least one substantially planar cutting blade, said blade being mounted at a small acute angle to an axis about which said blade is rotated.
Claim 10
Dependent Claim
14 words
The apparatus of claim 8 wherein said small acute angle is approximately 5 degrees.
Claim 11
Dependent Claim
38 words
The apparatus of claim 1 wherein said cutting blade means comprises a pair of substantially planar cutting blades, each of said blades being mounted at a small acute angle to an axis about which said blade is rotated.
Claim 12
Dependent Claim
14 words
The apparatus of claim 10 wherein said small acute angle is approximately 5 degrees.
Claim 13
Dependent Claim
14 words
The apparatus of claim 11 wherein said blades are slightly offset from each other.
Claim 14
Dependent Claim
14 words
The apparatus of claim 10 wherein said blades are slightly offset from each other.
Claim 15
Dependent Claim
33 words
The apparatus of claim 1 additionally comprising drive means for rotating said cutting blade means wherein said cutting means is rotated by said drive means within the range of 10,000 to 50,000 RPM.
Claim 16
Dependent Claim
17 words
The apparatus of claim 1 additionally comprising suction means to aid in the removal of said tissue.
Claim 17
Dependent Claim
23 words
The apparatus of claim 15 wherein said suction means comprises a lumen having an opening at said distal end portion of said apparatus.
Claim 18
Dependent Claim
23 words
The apparatus of claim 16 wherein said suction means comprises a lumen having an opening at said distal end portion of said apparatus.
Claim 19
Dependent Claim
20 words
The apparatus of claim 1 additionally comprising means for providing an irrigation liquid to said distal end of said apparatus.
Claim 20
Dependent Claim
63 words
The apparatus of claim 1 wherein said apparatus additionally comprises a tubular sheath, and wherein said elongated member comprises a portion of a device suitable to be supported by hand, said tubular sheath having an open distal end insertable into the body of said being adjacent said tissue, said device including releasably securable means to releasably secure said device within said tubular sheath.
Claim 21
Dependent Claim
26 words
The apparatus of claim 19 wherein said device additionally comprises suction means extending through said elongated portion thereof of aid in the removal of said tissue.
Claim 22
Dependent Claim
24 words
The apparatus of claim 20 wherein said suction means comprises a lumen having an opening adjacent said open distal end of said tubular sheath.
Claim 23
Dependent Claim
24 words
The apparatus of claim 21 wherein said lumen is formed by a space between said tubular sheath and said elongated portion of said device.
Claim 24
Dependent Claim
25 words
The apparatus of claim 22 wherein said device additionally comprising means for providing an irrigation liquid to said open distal end of said tubular sheath.
Claim 25
Dependent Claim
36 words
The apparatus of claim 23 wherein said last mentioned means comprises a lumen extending through said elongated portion of said device and having an open end located adjacent said open distal end of said tubular sheath.
Claim 26
Dependent Claim
41 words
The apparatus of claim 24 additionally comprising imaging means for providing an visual image of the tissue as said laser and said cutting means is operated, said imaging means comprising optic fiber means extending through said elongated portion of said device.
Claim 27
Dependent Claim
19 words
The apparatus of claim 25 wherein said device comprises motor means to effect the rotation of said cutting means.
Claim 28
Dependent Claim
26 words
The apparatus of claim 19 wherein said device additionally comprising irrigation means for providing an irrigation liquid to said open distal end of said tubular sheath.
Claim 29
Dependent Claim
35 words
The apparatus of claim 27 wherein said irrigation means comprises a lumen extending through said elongated portion of said device and having an open end located adjacent said open distal end of said tubular sheath.
Claim 30
Dependent Claim
41 words
The apparatus of claim 19 additionally comprising imaging means for providing an visual image of the tissue as said laser and said cutting means is operated, said imaging means comprising optic fiber means extending through said elongated portion of said device.
Claim 31
Dependent Claim
19 words
The apparatus of claim 29 wherein said device comprises motor means to effect the rotation of said cutting means.
Claim 32
Dependent Claim
25 words
The apparatus of claim 1 additionally comprising means for providing an visual image of the tissue as said laser and said cutting means is operated.
Claim 33
Independent Claim
136 words
A method of coagulating and removing tissue of a living being, said method comprising the steps of introducing elongated means having a distal end portion into the body of said being to a position adjacent said tissue, coupling laser beam producing means to said distal end portion of said elongated means, directing a laser beam from said laser beam producing means into said tissue adjacent said distal end portion of said elongated means to coagulate at least a portion thereof, providing rotatable cutting means located at said distal end portion for engaging and cutting at least a portion of said coagulated tissue to create particles thereof, with the cellular architecture of said particles being sufficiently preserved for histological examination, and carrying said particles out of the body of said being through said elongated means for retrieval.
Claim 34
Independent Claim
136 words
A method of coagulating and removing tissue of a living being, said method comprising the steps of introducing elongated means having a distal end portion into the body of said being to a position adjacent said tissue, coupling laser beam producing means to said distal end portion of said elongated means, directing a laser beam from said laser beam producing means into said tissue adjacent said distal end portion of said elongated means to coagulate at least a portion thereof, providing rotatable cutting means located at said distal end portion for engaging and cutting at least a portion of said coagulated tissue to create particles thereof, with the cellular architecture of said particles being sufficiently preserved for histological examination, and carrying said particles out of the body of said being through said elongated means for retrieval.
Claim 35
Dependent Claim
15 words
The method of claim 32 additionally comprising performing a histological examination on said retrieved tissue.
Claim 36
Dependent Claim
39 words
The method of claim 33 wherein said method comprises removing at least a portion of the prostate of a living being, and wherein said distal end of said elongated means is introduced transurethrally to a position adjacent said prostate.
Claim 37
Dependent Claim
21 words
The method of claim 33 wherein said tissue is removed at the rate of approximately 6 to 8 grams per minute.
Claim 38
Dependent Claim
53 words
The method of claim 35 wherein said method comprises removing at least a portion of the prostate of a living being, wherein said laser beam is provided by a YAG laser operating within the range of 40-60 watts, and wherein said prostate tissue is lased for a period of 3 to 5 seconds.
Claim 39
Dependent Claim
20 words
The method of claim 36 wherein said laser beam penetrates said tissue to a depth approximately one to three millimeters.
Claim 40
Dependent Claim
20 words
The method of claim 33 wherein said laser beam penetrates said tissue to a depth approximately one to three millimeters.
Claim 41
Dependent Claim
48 words
The method of claim 33 additionally comprising the step of irrigating the situs of said prostate tissue to be removed with a liquid, and causing said liquid to carrying said portions of said coagulated prostate tissue removed by said cutting means away from said situs for retrieval thereof.
Claim 42
Dependent Claim
39 words
The method of claim 32 wherein said method comprises removing at least a portion of the prostate of a living being, and wherein said distal end of said elongated means is introduced transurethrally to a position adjacent said prostate.
Claim 43
Dependent Claim
18 words
The method of claim 32 additionally comprising applying suction to said removed tissue aid in the retrieval thereof.
Claim 44
Dependent Claim
14 words
The method off claim 41 additionally comprising providing an irrigation liquid to said tissue.
Claim 45
Dependent Claim
14 words
The method of claim 32 additionally comprising providing an irrigation liquid to said tissue.
Claim 46
Dependent Claim
23 words
The method of claim 32 wherein said rotatable cutting means is rotated at a speed in the range of 10,000 to 50,000 RPM.
Claim 47
Dependent Claim
53 words
The method of claim 32 wherein said method comprises removing at least a portion of the prostate of a living being, wherein said laser beam is provided by a YAG laser operating within the range of 40-60 watts, and wherein said prostate tissue is lased for a period of 3 to 5 seconds.
Claim 48
Dependent Claim
20 words
The method of claim 32 wherein said laser beam penetrates said tissue to a depth approximately one to three millimeters.
Claim 49
Dependent Claim
58 words
The method of claim 32 further comprising inserting a tubular sheath into said being to the situs of tissue to be removed, inserting said elongated means into said sheath in such a manner that a portion of said sheath shields a lateral portion of said rotatable cutting means, while another lateral portion of said cutting means is exposed.
Claim 50
Dependent Claim
46 words
The method of claim 32 additionally comprising the step of irrigating the situs of said tissue to be removed with a liquid, and causing said liquid to carrying said portions of said coagulated tissue removed by said cutting means away from said situs for retrieval thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-05-16 | 1997-11-15 | 1998-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-16 | 2001-11-15 | 2002-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-16 | 2005-11-15 | 2006-05-17 | $7700.00 | Window Closed / Lapsed |