Patent US3900022A successfully refreshed from Google Patents.
US3900022A
Expired / Lapsed
US
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Endoscope with uninterrupted flow purging system
Assignee: Individual
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Filing: 1973-12-10
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Granted: 1975-08-19
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Expires: 1993-12-10
Abstract
Abstract An endoscope characterized by two separate yet generally coextensive fluid conduits disposed along the length thereof, thereby making feasible the establishment of a continuous, uninterrupted tissue-irrigating flow of fluid to and from a zone of examination and treatment into which the lead portion of the endoscope is introduced, so as to purge the zone to enhance the viewing therewithin and to facilitate treatment including surgical procedures carried out in the zone. Sensing means, pressure indicator means, and regulator means are provided for monitoring and controlling the fluid flow rate and for setting and limiting fluid pressure in the system.
Inventors
- 👤 Jerrold Widran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:53
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/307; A61B1/12; A61M; A61M1/00; A61M1/71; A61M1/77; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7303
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
188 words
In an endoscope including conduit means insertable longitudinally into a restricted passage communicating with a body cavity for transmittal of a fluid stream through said passage and into and from a zone of treatment subjected to a surgical technique, tissue treatment means including means for removing tissue from said zone, optical means for viewing said zone, means for illuminating said zone, means for selectively manipulating said tissue treatment means in carrying out said surgical technique, pump means for driving fluid through said conduit means for said zone of treatment, thereby to establish a continuous fluid flow circuit for passage of fluid into and discharge of fluid from said zone of treatment in an uninterrupted stream, and fluid impelling means distinct from said pump means the improvement comprising: flow rate synchronization means operable functionally in a series flow path including a zone of treatment to synchronize said fluid impelling means volume-wise with said pump means to preclude pressure buildup in said zone of treatment by reason of fluid forced into said zone of treatment, and to obviate collapse of said body cavity as a result of fluid evacuation therefrom.
Claim 2
Dependent Claim
188 words
In an endoscope including conduit means insertable longitudinally into a restricted passage communicating with a body cavity for transmittal of a fluid stream through said passage and into and from a zone of treatment subjected to a surgical technique, tissue treatment means including means for removing tissue from said zone, optical means for viewing said zone, means for illuminating said zone, means for selectively manipulating said tissue treatment means in carrying out said surgical technique, pump means for driving fluid through said conduit means for said zone of treatment, thereby to establish a continuous fluid flow circuit for passage of fluid into and discharge of fluid from said zone of treatment in an uninterrupted stream, and fluid impelling means distinct from said pump means the improvement comprising: flow rate synchronization means operable functionally in a series flow path including a zone of treatment to synchronize said fluid impelling means volume-wise with said pump means to preclude pressure buildup in said zone of treatment by reason of fluid forced into said zone of treatment, and to obviate collapse of said body cavity as a result of fluid evacuation therefrom.
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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |