Patent US5542944A successfully refreshed from Google Patents.
US5542944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical device and method
Assignee: Individual
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Filing: 1994-09-23
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Granted: 1996-08-06
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Expires: 2014-09-23
Abstract
Abstract A surgical instrument adapted for use in prostate, intra-uterine, kidney, liver, bladder and urinary tract surgery and the like comprising an elongate flexible casing having a delivery tube for delivering a working fluid to the target tissue, and an optical fiber for delivering a coherent beam of electromagnetic radiation to the working fluid whereby to heat the working fluid and in turn thermally treat the target tissue.
Inventors
- 👤 Krishan M. Bhatta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:36
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/18; A61B18/20; A61B18/22; A61B18/24; A61B17/00; A61B17/32; A61B17/3205; A61B17/32056; A61B17/00234; A61B2017/00238; A61B2017/00274; A61B2017/00831; A61B2018/00005; A61B2018/00011; A61B2018/00315; A61B2018/00547; A61B18/04; A61B18/12; A61B18/14; A61B2018/1405; A61B2018/1407; A61M; A61M3/00; A61M3/02; A61M3/0279
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
108 words
A surgical instrument comprising in combination: a. an elongate casing having a proximal and distal end; b. means for delivering a fluid to target tissue, said fluid delivery means being carried within said casing and terminating adjacent the distal end of said casing; c. means for delivering a coherent beam of electromagnetic radiation to said fluid whereby to heat said target tissue, said delivery means being carried within said casing and terminating adjacent said distal end thereof; and d. a stationary cutting blade affixed to the outer surface of said casing adjacent to and spaced rearwardly from said distal end for aiding in removal of said target tissue.
Claim 2
Dependent Claim
108 words
A surgical instrument comprising in combination: a. an elongate casing having a proximal and distal end; b. means for delivering a fluid to target tissue, said fluid delivery means being carried within said casing and terminating adjacent the distal end of said casing; c. means for delivering a coherent beam of electromagnetic radiation to said fluid whereby to heat said target tissue, said delivery means being carried within said casing and terminating adjacent said distal end thereof; and d. a stationary cutting blade affixed to the outer surface of said casing adjacent to and spaced rearwardly from said distal end for aiding in removal of said target tissue.
Claim 3
Dependent Claim
34 words
An instrument according to claim 1, further comprising optical fiber means carried within said casing and terminating adjacent the distal end of said casing for illuminating areas adjacent the distal end of said casing.
Claim 4
Dependent Claim
24 words
An instrument according to claim 1, further comprising optical viewing means carried within said casing and terminating adjacent the distal end of said casing.
Claim 5
Dependent Claim
19 words
An instrument according to claim 1, and including an electrocautery loop affixed adjacent the distal end of said casing.
Claim 6
Dependent Claim
12 words
An instrument according to claim 4, wherein said electrocautery loop is detachable.
Claim 7
Dependent Claim
31 words
An instrument according to claim 1, wherein said casing comprises a major axis, and said blade includes cutting edges that form an approximately 90° angle with the axis of said casing.
Claim 8
Dependent Claim
19 words
An instrument according to claim 6, wherein said blade includes cutting edges on both proximal and distal edges thereof.
Claim 9
Dependent Claim
13 words
An instrument according to claim 6, wherein said blade is generally cone shaped.
Claim 10
Dependent Claim
13 words
An instrument according to claim 6, wherein said blade is generally cylindrically shaped.
Claim 11
Dependent Claim
13 words
An instrument according to claim 6, wherein said blade is generally quadrangularly shaped.
Claim 12
Dependent Claim
36 words
An instrument according to claim 1, wherein said casing comprises a major axis, and said blade includes cutting edges that form an angle in the range of 25° to 75° from the axis of said casing.
Claim 13
Dependent Claim
59 words
In a method of treating target tissue within a body using a device according to claim 1, said method including delivering electromagnetic radiation to the target tissue by said beam delivery means, the improvement which comprises, substantially simultaneously, cooling the electromagnetic energy and the target tissue by means of said fluid, and removing said target tissue using said blade.
Claim 14
Dependent Claim
16 words
A method according to claim 12 for use in prostate, intra-uterine, bladder and urinary tract surgery.
Claim 15
Dependent Claim
121 words
A surgical instrument, and comprising: a. an elongate casing having a proximal and distal end; b. means for delivering a fluid to target tissue, said fluid delivery means being carried within said casing and terminating adjacent the distal end of said casing; c. means for delivering a coherent beam of electromagnetic radiation to said fluid whereby to heat said target tissue, said delivery means being carried within said casing and terminating adjacent said distal end thereof; and d. a stationary cutting blade affixed to the outer surface of said casing adjacent to and spaced rearwardly from said distal end for aiding in removal of said target tissue, said blade being adapted to be energized so as to provide an electrocautery element.
Claim 16
Dependent Claim
121 words
A surgical instrument, and comprising: a. an elongate casing having a proximal and distal end; b. means for delivering a fluid to target tissue, said fluid delivery means being carried within said casing and terminating adjacent the distal end of said casing; c. means for delivering a coherent beam of electromagnetic radiation to said fluid whereby to heat said target tissue, said delivery means being carried within said casing and terminating adjacent said distal end thereof; and d. a stationary cutting blade affixed to the outer surface of said casing adjacent to and spaced rearwardly from said distal end for aiding in removal of said target tissue, said blade being adapted to be energized so as to provide an electrocautery element.
Claim 17
Dependent Claim
19 words
In a method according to claim 12, wherein said target tissue comprises prostate, intra-uterine, bladder, and urinary tract tissue.
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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) | 1999-08-06 | 2000-02-05 | 2000-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-08-06 | 2004-02-05 | 2004-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-08-06 | 2008-02-05 | 2008-08-06 | $7700.00 | Window Closed / Lapsed |