US3850175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resectoscope with continuous irrigation
Assignee: Individual
•
Filing: 1972-07-03
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Granted: 1974-11-26
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Expires: 1992-07-03
Abstract
Abstract An improved resectoscope for transurethral resection of prostate and bladder tumors provides continuous irrigation of the operative field with clear fluid and continuous drainage of bloody fluid from the bladder. This is accomplished by means of an outflow conduit positioned above the telescope shaft, with its inlet located beyond the objective lens. There are several alternative structures and arrangements for the inlet of the outflow conduit. In one a baffle is provided for guiding and separating the inflowing clear fluid stream and the outflowing bloody fluid; in another an opening in the upper part of the beak of the resectoscope sheath to permit passage of the bloody fluid in the bladder to the outflow conduit inside the sheath; while in another there are two entrances to the outflow system, the first being through the opening in the beak of the sheath and the second in a baffle plate below the beak, the latter being effective only when the first is closed by surrounding tissue. The outflow conduit may be provided by space within a tube within the sheath within which tube the telescope shaft is housed, or it may be provided by the space between outer and inner walls of the sheath above a telescope shaft.
Inventors
- 👤 J Lglesias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:25
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/00064; A61B1/00071; A61B1/0008; A61B1/00091; A61B1/00131; A61B1/00135; A61B1/012; A61B1/015; A61B1/018; A61B1/12; A61B1/307; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/149
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
157 words
A urological endoscopic instrument, comprising an elongated cylindrical beaked sheath, a tube within and extending longitudinally of the sheath with its distal end within the beak of the sheath, and being of less cross sectional area than the sheath to provide between the sheath and the tube an inflow conduit for irrigating fluid for the operative field, means at the proximate end of the sheath for supplying irrigating fluid to the inflow conduit, a telescope having a tubular shaft within and extending longitudinally of the tube and being of less cross sectional area than the tube to provide between the tube and the telescope shaft an outflow conduit for turbid fluid from the operative field, an outflow connection at the proximate end of the tube for removal of turbid fluid from the outflow conduit, the telescope having an objective lens at the distal end of the shaft which is proximate to the distal end of the tube.
Claim 2
Dependent Claim
157 words
A urological endoscopic instrument, comprising an elongated cylindrical beaked sheath, a tube within and extending longitudinally of the sheath with its distal end within the beak of the sheath, and being of less cross sectional area than the sheath to provide between the sheath and the tube an inflow conduit for irrigating fluid for the operative field, means at the proximate end of the sheath for supplying irrigating fluid to the inflow conduit, a telescope having a tubular shaft within and extending longitudinally of the tube and being of less cross sectional area than the tube to provide between the tube and the telescope shaft an outflow conduit for turbid fluid from the operative field, an outflow connection at the proximate end of the tube for removal of turbid fluid from the outflow conduit, the telescope having an objective lens at the distal end of the shaft which is proximate to the distal end of the tube.
Claim 3
Dependent Claim
49 words
An endoscopic instrument according to claim 1, comprising in addition, a buffer plate at the distal end of the tube positioned externally of the tube at the upper part thereof and closing the inflow conduit between the upper part of the sheath and the upper part of the tube.
Claim 4
Dependent Claim
23 words
An endoscopic instrument according to claim 2, in which the buffer plate is positioned normal to the axes of the tube and sheath.
Claim 5
Dependent Claim
41 words
An endoscopic instrument according to claim 2, comprising in addition a flange connected to the buffer plate and positioned distal thereto and being upwardly inclined to the axis of the tube and sheath from its lower edge to its upper edge.
Claim 6
Dependent Claim
21 words
An endoscopic instrument according to claim 4, in which the flange has an aperture therein at and adjacent its upper edge.
Claim 7
Dependent Claim
36 words
An endoscopic instrument according to claim 1, comprising in addition the provision of an opening in the upper wall of the beak of the sheath on the distal side of the objective lens of the telescope.
Claim 8
Dependent Claim
27 words
An endoscopic instrument according to claim 6, in which the proximate edge of the opening is on the distal side of the objective lens of the telescope.
Claim 9
Dependent Claim
66 words
An endoscopic instrument according to claim 6, in which the buffer plate is positioned beneath the proximate edge of the opening, and comprising in addition a flange within the sheath positioned beneath the distal part of the opening and having a vertical extent approximately equal to that of the buffer plate and being inclined forwardly of the sheath from its lower edge to its upper edge.
Claim 10
Dependent Claim
20 words
An endoscopic instrument according to claim 8, in which an aperture is provided by notching the edge of the flange.
Claim 11
Dependent Claim
72 words
A urological endoscopic instrument, comprising an elongated cylindrical sheath, means for supplying clear irrigating fluid to the interior of the sheath at the proximate end thereof for delivery to the distal end of the sheath to irrigate the operative field, the sheath having two spaced walls at the upper part thereof extending from end to end of the sheath providing an outflow conduit for removal of turbid fluid from the operative field.
Claim 12
Dependent Claim
72 words
A urological endoscopic instrument, comprising an elongated cylindrical sheath, means for supplying clear irrigating fluid to the interior of the sheath at the proximate end thereof for delivery to the distal end of the sheath to irrigate the operative field, the sheath having two spaced walls at the upper part thereof extending from end to end of the sheath providing an outflow conduit for removal of turbid fluid from the operative field.
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) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |