Patent US4519695A successfully refreshed from Google Patents.
EP0448857A1
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EP
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An apparatus of a spinning type of resectoscope for prostatectomy
Assignee: HUANG JONG KHING
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Filing: 1990-03-27
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Granted: —
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Expires: 2010-03-27
Abstract
Abstract An apparatus of a new type of resectoscope for prostatectomy essentially comprising an electrical driving system which is connected to a replaceable high resistivity electrotome (1) or a screw thread cutting-knife (14a), and a tube-electrode to achieve the spinning-type of resection for prostate or bladder tumor. A DC-motor (34) and a transmission-gear (32 31) set are mounted within a hand grip (30) Other devices, such as the resectoscope sheath, (3) telescope universal electro-surgical unit, optical light source, and universal light guide cable may be connected to this apparatus. The resectoscope provides a high speed operation, safety, effectiveness, and convenience.
Inventors
- 👤 Jong-Khing Huang
- 👤 W.H. Chen
- 👤 Robert Y. S. Wang
- 👤 Chau Ching Chu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 19:45
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1485; A61B17/00; A61B17/32; A61B17/320016; A61B17/32002; A61B17/00234; A61B2017/00238; A61B2017/00274; A61B2018/00053; A61B2018/00184; A61B2018/00202; A61B2018/00208; A61B2018/00315; A61B2018/00505; A61B2018/00517; A61B2018/00547; A61B2018/00982; A61B2018/1405; A61B2018/1407; A61B18/18; A61B18/1815; A61B2018/1861; A61B2218/00; A61B2218/001; A61B2218/002; A61M; A61M3/00; A61M3/02; A61M3/0279
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
246 words
A spinning type of resectoscope for prostatectomy, comprising: a motor drive gear transmission system (10) including a gear box (31), a gear set (32) and a DC motor (34) and being connected to a power source supply; a resectoscope sheath consisting of an outer tube (3), a locker (4), a stopcock (5), and a body (6), wherein the stopcock (5) is connected to the body (6) and fixed by the locker (4) thereto; an electrotome (1) having an oval loop (14) of metal-wire as a cutting loop and a short section of cylindrical tube (15) as a cutting loop holder used as a support to said oval loop (14) of metal-wire, said electrotome (1) being spinnable by said motor-driven transmission gear set (32); a tube electrode (16) connected to said oval loop (14) at one end thereof, wherein the other end of the tube electrode (16) is connected to said transmission gear set (32) and an input power seat (11) which is connected to an universal electro-surgical unit through a connector (12); a hand grip (30) enclosing said transmission system (10) and equipped with controlling button (17) to switch on and off the motor (9) of said system (10), whereby the electrical voltage generated from said universal electro-surgical unit drives said DC motor (9) and the transmission gear set (34) to spin said tube electrode (16) and said electrotome (1), and the high voltage is applied to heat the electrotome (1) for resection or for coagulation.
Claim 2
Dependent Claim
33 words
A spinning type of resectoscope for prostatectomy as defined in claim 1, wherein the inner and outer surfaces of the front-end of said outer tube (3) are coated with a layer of epoxy.
Claim 3
Dependent Claim
21 words
A spinning type of resectoscope for prostatectomy as defined in claim 2, wherein said outer tube (3) is a metallic tube.
Claim 4
Dependent Claim
58 words
A spinning type of resectoscope for prostatectomy as defined in any one of claims 1 to 3, wherein said stopcock (5) is used to connect to a water supply through a hose to clean-up the resected tissue in the prostate and facilitate observation of the interior resecting portion through a telescope coaxially inserted into said tube electrode (16).
Claim 5
Dependent Claim
34 words
A spinning type of resectoscope for prostatectomy as defined in any one of claims 1 to 4, wherein said locker (4) is used to lock or unlock the sheath (3) to the body (6).
Claim 6
Dependent Claim
36 words
A spinning type of resectoscope for prostatectomy as defined in any one of claims 1 to 5, wherein said cutting loop is an oval loop (14) of metal-wire being made from a high resistivity metal wire.
Claim 7
Dependent Claim
22 words
A spinning type of resectoscope for prostatectomy as defined in claim 6, wherein said metal-wire is tungsten wire or nickel-chrome alloy wire.
Claim 8
Dependent Claim
24 words
A spinning type of resectoscope for prostatectomy as defined in claim 6 or 7, wherein said cutting loop is soldered to a loop holder.
Claim 9
Dependent Claim
28 words
A spinning type of resectoscope for prostatectomy as defined in any one of claims 1 to 5, wherein said cutting loop is a purely mechanical cutting knife (14-a).
Claim 10
Dependent Claim
29 words
A spinning type of resectoscope for prostatectomy as defined in claim 9, wherein said cutting knife (14-a) is an open ellipse loop which has a screw thread cutting curve.
Claim 11
Dependent Claim
33 words
A spinning type of resectoscope for prostatectomy as defined in claim 9 or 10, wherein said cutting knife (14-a) is made from an annealed and hardened medium carbon steel or high carbon steel.
Claim 12
Dependent Claim
39 words
A spinning type of resectoscope for prostatectomy as defined in any one of claims 1 to 11, wherein said tube-electrode (16) is a metallic cylinder for conducting electrical current or voltage from an electro-surgical generator to the electrotome (1).
Claim 13
Dependent Claim
48 words
A spinning type of resectoscope for prostatectomy as defined in any one of claims 1 to 12, wherein said tube-electrode (16) is coated at the inner surface thereof by a layer of polytetrafluoroethylene and is wrapped with a plastic shrinkage tube on its outer surface for electrical insulation.
Claim 14
Dependent Claim
39 words
A spinning type of resectoscope for prostatectomy as defined in any one of claims 1 to 13, wherein said tube-electrode (16) has a stabilizer (2) located at the front-end thereof to ensure a stable rotation of said tube (16).
Claim 15
Dependent Claim
39 words
A spinning type of resectoscope for prostatectomy as defined in any one of claims 1 to 14, wherein said tube-electrode (16) has one end connected to a transmission system (10) and an electro-surgical generator via a spring contact (38).
Claim 16
Dependent Claim
28 words
A spinning type of resectoscope for prostatectomy as defined in any one of claims 1 to 15, wherein said tube-electrode (16) is coaxial with the outer tube (3).
Claim 17
Dependent Claim
33 words
A spinning type of resectoscope for prostatectomy as defined in any one of claims 1 to 16, wherein said stop valve (7) is fixed on to said tube-electrode (16) to stop water leakage.
Claim 18
Dependent Claim
40 words
A spinning type of resectoscope for prostatectomy as defined in any one of claims 1 to 17, further comprising a locking mechanism (8) to lock and fix the hand grip (30) to the resectoscope sheath (3) via the body (6).
Claim 19
Dependent Claim
39 words
A spinning type of resectoscope for prostatectomy as defined in any one of claims 1 to 18, wherein said transmission system (10) comprising a gear set (32) and a DC motor (34) is located within the hand grip (30).
Claim 20
Dependent Claim
28 words
A spinning type of resectoscope for prostatectomy as defined in claim 19, wherein said gear set (32) is adjustable to vary the spinning speed of the electrotome (1).
Claim 21
Dependent Claim
48 words
A spinning type of resectoscope for prostatectomy as defined in claim 19 or 20, wherein said DC motor (34) is connected to an electrical power source supply via a connector (12) and is switched on and off by a button (17) mounted on to the hand grip (30).
References Cited (Backward Citations)
US2484059A
Cited
DE3339322A1
Cited
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