US4935005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Opthalmic fluid flow control system
Assignee: NESTLE SA ALCON LABORATORIES Inc A CORP OF SWITZERLAND
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Filing: 1989-02-01
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Granted: 1990-06-19
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Expires: 2009-02-01
Abstract
Abstract A fluid flow control apparatus specially adapted for use with an ultrasonic surgical tool which provides for irrigation of a surgical site and for aspirating fluid from the site comprises a source of irrigation fluid, comprises an irrigation fluid conduit for conducting the irrigation fluid to a surgical site, an aspiration fluid conduit for conducting fluid away from the surgical site, a suction pump connected to the aspiration fluid conduit for aspirating fluid from the surgical site, a pressure-sensitive control system for removing the source of suction from the aspiration conduit when a predetermined value of suction is exceeded, and a valve for controllably admitting irrigation fluid into the aspiration fluid conduit. A check valve in the irrigation conduit prevents a reverse surge when the irrigation fluid is admitted to the aspiration conduit.
Inventors
- 👤 Stephen W. Haines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:55
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/007; A61F9/00736; A61F9/00745; A61M; A61M1/00; A61M1/71; A61M1/74; A61M1/742; F; F16; F16L; F16L41/00; F16L41/02; F16L41/03
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
224 words
A fluid control apparatus for use with a surgical irrigation and aspiration instrument adapted for irrigation and aspiration of a surgical site located in a small elastic chamber, said fluid control apparatus comprising: an irrigation fluid conduit means including valve means for conducting irrigation fluid from a single source of irrigation fluid to the surgical site, an aspiration fluid conduit means operatively connected to a source of vacuum for removing fluid from the surgical site, a single controllable pump means in fluid communication with said aspiration fluid conduit means for providing suction in said aspiration fluid conduit means, and a pressure sensitive transducer means in fluid communication with said aspiration fluid conduit means for generating, when said controllable pump means is pumping, a pump control signal for said controllable pump means proportional to the rise in vacuum in said aspiration fluid conduit means induced by said pump means, and said transducer means sensing a vacuum rise in said aspiration fluid conduit means and, a liquid pressure equalizing means for admitting irrigation liquid from the single source of irrigation liquid when said valve means is opened to said aspiration fluid conduit means when a blockage occurs therein to vent the vacuum therein so as to remove the blockage, said pressure equalizing means allowing the equalizing of the pressure in said aspiration and irrigation conduit means.
Claim 2
Dependent Claim
224 words
A fluid control apparatus for use with a surgical irrigation and aspiration instrument adapted for irrigation and aspiration of a surgical site located in a small elastic chamber, said fluid control apparatus comprising: an irrigation fluid conduit means including valve means for conducting irrigation fluid from a single source of irrigation fluid to the surgical site, an aspiration fluid conduit means operatively connected to a source of vacuum for removing fluid from the surgical site, a single controllable pump means in fluid communication with said aspiration fluid conduit means for providing suction in said aspiration fluid conduit means, and a pressure sensitive transducer means in fluid communication with said aspiration fluid conduit means for generating, when said controllable pump means is pumping, a pump control signal for said controllable pump means proportional to the rise in vacuum in said aspiration fluid conduit means induced by said pump means, and said transducer means sensing a vacuum rise in said aspiration fluid conduit means and, a liquid pressure equalizing means for admitting irrigation liquid from the single source of irrigation liquid when said valve means is opened to said aspiration fluid conduit means when a blockage occurs therein to vent the vacuum therein so as to remove the blockage, said pressure equalizing means allowing the equalizing of the pressure in said aspiration and irrigation conduit means.
Claim 3
Dependent Claim
254 words
A fluid control apparatus for use with a surgical irrigation and aspiration instrument adapted for irrigation and aspiration of a surgical site located in a small elastic chamber, said fluid control apparatus comprising: an irrigation fluid conduit means including valve means for conducting irrigation fluid from a single source of irrigation fluid to the surgical site, an aspiration fluid conduit means for removing fluid from the surgical site, a suction means in fluid communication with said aspiration fluid conduit means for providing suction in said aspiration fluid conduit means, a pressure sensitive transducer means in fluid communication with said aspiration fluid conduit means for generating, when said controllable pump means is pumping, a pump control signal for said controllable pump means proportional to the rise in vacuum in said aspiration fluid conduit means induced by said pump means, and said transducer means sensing a vacuum rise in said aspiration fluid conduit means and for disconnecting said aspiration fluid conduit means from the source, a liquid pressure equalizing means for admitting irrigation liquid from the single source of irrigation liquid when said valve means is opened to said aspiration fluid conduit means when a blockage occurs therein to vent the vacuum therein so as to remove the blockage, and said liquid pressure equalizing means including a pressure equalizing conduit providing communication for the irrigation liquid from the single source of irrigation liquid to said aspiration fluid conduit means, said pressure equalizing means allowing the equalizing of the pressure in said aspiration and irrigation conduit means.
Claim 4
Dependent Claim
254 words
A fluid control apparatus for use with a surgical irrigation and aspiration instrument adapted for irrigation and aspiration of a surgical site located in a small elastic chamber, said fluid control apparatus comprising: an irrigation fluid conduit means including valve means for conducting irrigation fluid from a single source of irrigation fluid to the surgical site, an aspiration fluid conduit means for removing fluid from the surgical site, a suction means in fluid communication with said aspiration fluid conduit means for providing suction in said aspiration fluid conduit means, a pressure sensitive transducer means in fluid communication with said aspiration fluid conduit means for generating, when said controllable pump means is pumping, a pump control signal for said controllable pump means proportional to the rise in vacuum in said aspiration fluid conduit means induced by said pump means, and said transducer means sensing a vacuum rise in said aspiration fluid conduit means and for disconnecting said aspiration fluid conduit means from the source, a liquid pressure equalizing means for admitting irrigation liquid from the single source of irrigation liquid when said valve means is opened to said aspiration fluid conduit means when a blockage occurs therein to vent the vacuum therein so as to remove the blockage, and said liquid pressure equalizing means including a pressure equalizing conduit providing communication for the irrigation liquid from the single source of irrigation liquid to said aspiration fluid conduit means, said pressure equalizing means allowing the equalizing of the pressure in said aspiration and irrigation conduit means.
Claim 5
Dependent Claim
26 words
The apparatus of claim 2 wherein the source of irrigation fluid comprises a bottle containing the irrigation fluid and is positioned generally above the surgical site.
Claim 6
Dependent Claim
26 words
The apparatus of claim 2 wherein the source of irrigation fluid comprises a bag containing the irrigation fluid and is positioned generally above the surgical site.
References Cited (Backward Citations)
US901545A
Cited
US2302617A
Cited
US2584206A
Cited
US3589363A
Cited
US3693613A
Cited
US3812855A
Cited
US3902495A
Cited
US4007742A
Cited
US4024866A
Cited
US4136700A
Cited
US4168707A
Cited
US4333454A
Cited
US4340037A
Cited
US4395258A
Cited
US4493698A
Cited
US4496342A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-18 | 1993-12-18 | 1994-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-18 | 1997-12-18 | 1998-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-18 | 2001-12-18 | 2002-06-19 | $7700.00 | Window Closed / Lapsed |