Source: http://www.google.com/patents/US5704927?dq=7,177,838
Timestamp: 2016-06-30 22:36:10
Document Index: 782738005

Matched Legal Cases: ['arts 14', 'art 14', 'art 16', 'arts 14', 'art 14', 'art 16']

Patent US5704927 - Controlled vacuum in ophthalmic retinal surgery - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsThe invention relates to a cassette 12 and vacuum aspiration collection system 10 for ophthalmic surgery. The cassette 12 comprises two parts 14, 16 under vacuum where the smaller part 14 discharges into the larger part 16 and the vacuum provided to both parts is provided by a single unit 30. The vacuum...http://www.google.com/patents/US5704927?utm_source=gb-gplus-sharePatent US5704927 - Controlled vacuum in ophthalmic retinal surgeryAdvanced Patent SearchPublication numberUS5704927 APublication typeGrantApplication numberUS 08/667,450Publication dateJan 6, 1998Filing dateJun 21, 1996Priority dateJun 8, 1994Fee statusLapsedAlso published asEP0764033A1, EP0764033A4, US5584824, WO1995033503A1Publication number08667450, 667450, US 5704927 A, US 5704927A, US-A-5704927, US5704927 A, US5704927AInventorsRichard J. Gillette, James C. EasleyOriginal AssigneeSyntec, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (10), Referenced by (23), Classifications (13), Legal Events (8) External Links: USPTO, USPTO Assignment, EspacenetControlled vacuum in ophthalmic retinal surgery
US 5704927 AAbstract
The invention relates to a cassette 12 and vacuum aspiration collection system 10 for ophthalmic surgery. The cassette 12 comprises two parts 14, 16 under vacuum where the smaller part 14 discharges into the larger part 16 and the vacuum provided to both parts is provided by a single unit 30. The vacuum control system 10 has improved response to the user's demand.
1. A surgical cassette having two interconnected chambers, a first chamber having a volume of at least about 25 cc connected through a controlled vacuum conduit means to a second chamber having a volume at least about four times that of the first chamber, the chambers also being interconnected by a controlled orifice such that when the chambers are simultaneously under vacuum from a single vacuum source, the level of vacuum in the second chamber is at least 40 mm Hg absolute greater than in the first chamber thereby assisting the passage of aspirant through the controlled orifice from the first chamber to the second larger chamber substantially without interruption of the vacuum level in the first chamber.
2. The surgical cassette of claim 1 wherein the controlled orifice is a hole whose opening is controlled by a valve.
3. The surgical cassette of claim 2 wherein the valve is a flap valve controlled by a float.
4. The surgical cassette of claim 1 wherein the controlled orifice comprises a valve controlled by a float such that when aspirant accumulates in the first chamber to a predetermined level, the float opens the valve to allow a portion of the accumulated aspirant to flow through the orifice from the first chamber to the second chamber.
5. The surgical cassette of claim 1 wherein the first chamber has a volume of about 50 cc and the second chamber has a volume of about 500 cc.
6. The surgical cassette of claim 1 wherein when the chambers are under vacuum, the vacuum in the second chamber reaches a level of at least about 550 mm Hg absolute and the vacuum in the first chamber does not exceed a level of about 400 mm Hg absolute.
7. The surgical cassette of claim 1 wherein the first chamber is contained within the second chamber.
8. An apparatus having a surgical cassette in combination with a vacuum source comprising:(a) a surgical cassette with a first chamber having a first volume, and a second chamber having a second volume, the volume of said second chamber being at least about four times that of the first chamber, the chambers being interconnected by a controlled orifice; (b) the vacuum source being connected to the second chamber to provide a vacuum of at least about 400 mm Hg gauge, the vacuum being maintained at a predetermined level; and (c) conduit means for applying the vacuum of the second chamber to the first chamber such that the vacuum of the first chamber quickly approaches the vacuum of the second chamber, the controlled orifice permitting passage of aspirant through the controlled orifice from the first chamber to the second chamber substantially without interruption of the vacuum level in the first chamber. 9. The apparatus of claim 8 wherein the controlled orifice is controlled by a valve.
10. The apparatus of claim 9 wherein the valve is a float valve.
11. The apparatus of claim 10 wherein the first chamber has a volume of about 50 cc and the second chamber has a volume of about 500 cc.
12. The apparatus of claim 11 wherein when the chambers are under vacuum, the vacuum of the second chamber reaches a level of at least about 550 mm Hg absolute and the vacuum of the first chamber does not exceed a level of about 400 mm Hg absolute.
13. The apparatus of claim 8 including a vacuum regulator to regulate the vacuum in the first chamber to a level selected by an external control means, the level being at least about 40 mm Hg absolute less than the vacuum level of the second chamber; and an aspiration line connected from the first chamber to a surgical device.
14. The apparatus of claim 13 wherein the first chamber of the cassette has a volume of about 50 cc and the second chamber of the cassette has a volume of about 500 cc.
15. The apparatus of claim 13 wherein the controlled orifice is a hole whose opening and closing is controlled by a valve.
16. The apparatus of claim 15 wherein the valve is controlled by a float.
17. The apparatus of claim 13 wherein when the chambers are under vacuum, the vacuum level in the first chamber does not exceed about 400 mm Hg gauge and the level of the vacuum in the second chamber reaches a level of at least about 550 mm Hg gauge.
18. The apparatus of claim 13 wherein thee first chamber of the cassette has a volume of about 50 cc and the second chamber of the cassette has a volume of about 500 cc and when the chambers are under vacuum, the vacuum level in the first chamber does not exceed about 500 mm Hg gauge and the level of the vacuum in the second chamber reaches a level of at least about 550 mm Hg gauge.
This is a continuation of application Ser. No. 08/255,659, filed on Jun. 8, 1994, now U.S. Pat. No. 5,584,824.
With respect to FIG. 1, a vacuum aspiration collection system 10 has a cassette 12 with a large chamber 16 and a small chamber 14. There is an orifice 18 between the small chamber 14 and the large chamber 16. The orifice is closed when the flap valve 20 covers the orifice 18. The valve 20 is controlled by a float 22 so that when the aspirant flowing from the aspirant line 34 fills the chamber 14 part way, the float 22 opens the valve 20. A vacuum is created in the chamber 16 by the vacuum pump 24. A conduit 26 from the chamber 16 extends to the chamber 14 through a regulator 28. The regulator 28 controls the amount of vacuum in the small chamber 14. A foot pedal 30 connected to the regulator 28, allows the surgeon to control the vacuum within a predetermined range in the small chamber 14. The surgical device 32 is connected to the small chamber 14 through an aspiration line 34. As the aspirant comes from the surgical device 32, it is drawn through the aspirant line 34 into the small chamber 14. As the level of aspirant rises in the small chamber 14, the float 22 rises and opens the flap valve 20 whereupon the aspirant exits the small chamber 14 through the orifice 18 into the large chamber 16 where the vacuum is greater than that in the small chamber 14. The aspirant 36 is collected in the large chamber 16.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS3768478 *Aug 25, 1972Oct 30, 1973Vermitron Medical Prod IncAspiration device for body fluidsUS4475904 *Dec 29, 1982Oct 9, 1984Medical Instrument Dev. Labs., Inc.Fast response vacuum aspiration collection systemUS4626248 *Dec 16, 1985Dec 2, 1986Storz Instrument CompanyOphthalmic cassetteUS4627833 *Jun 4, 1984Dec 9, 1986Site Microsurgical Systems, Inc.Microsurgical system cassette assemblyUS4650477 *Sep 13, 1985Mar 17, 1987Sorenson Research Co. Inc.Suction drainage apparatusUS4706687 *Feb 28, 1985Nov 17, 1987Alcon Instrumentation, Inc.Linear suction control systemUS4735610 *Apr 10, 1986Apr 5, 1988Coopervision, Inc.Disposable surgical fluid handling cassetteUS4758238 *Aug 6, 1987Jul 19, 1988Alcon Laboratories, Inc.Fast response tubeless vacuum aspiration collection cassetteUS4773897 *Nov 6, 1986Sep 27, 1988Storz Instrument CompanyCollection container for ophthalmic surgical systemUS4838281 *Oct 13, 1987Jun 13, 1989Alcon Laboratories, Inc.Linear suction control system* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS5899674 *Jul 27, 1998May 4, 1999Alcon Laboratories, Inc.Indentification system for a surgical cassetteUS6261283Aug 31, 1999Jul 17, 2001Alcon Universal Ltd.Liquid venting surgical system and cassetteUS6358260Apr 20, 1998Mar 19, 2002Med-Logics, Inc.Automatic corneal shaper with two separate drive mechanismsUS6425905Nov 29, 2000Jul 30, 2002Med-Logics, Inc.Method and apparatus for facilitating removal of a corneal graftUS6428508Feb 1, 2000Aug 6, 2002Enlighten Technologies, Inc.Pulsed vacuum cataract removal systemUS6599271Apr 13, 2000Jul 29, 2003Syntec, Inc.Ophthalmic flow converterUS6632214Jan 29, 2001Oct 14, 2003Alcon, Inc.Liquid venting surgical cassetteUS6663644Jun 2, 2000Dec 16, 2003Med-Logics, Inc.Cutting blade assembly for a microkeratomeUS6699285Feb 9, 2001Mar 2, 2004Scieran Technologies, Inc.Eye endoplant for the reattachment of a retinaUS6702832Oct 15, 2002Mar 9, 2004Med Logics, Inc.Medical device for cutting a cornea that has a vacuum ring with a slitted vacuum openingUS6740074Aug 9, 2001May 25, 2004Alcon, Inc.Liquid venting surgical cassetteUS6902542May 28, 2002Jun 7, 2005Alcon, Inc.Identification system for a surgical cassetteUS6908451Apr 25, 2002Jun 21, 2005Alcon, Inc.Liquid venting surgical systemUS8011905Sep 6, 2011Novartis AgSurgical cassetteUS8465467Jun 18, 2013Novartis AgMethod of controlling an irrigation/aspiration systemUS8545198Jun 8, 2011Oct 1, 2013Novartis AgSurgical cassetteUS20030221694 *May 28, 2002Dec 4, 2003Raphael GordonIdentification system for a surgical cassetteUS20030225363 *May 28, 2002Dec 4, 2003Raphael GordonSurgical cassetteUS20030225366 *May 7, 2003Dec 4, 2003Morgan Michael D.Liquid venting surgical cassetteUS20070106301 *Nov 9, 2005May 10, 2007Alcon, Inc.Sclerotomy adapterUS20080125697 *Sep 14, 2006May 29, 2008Alcon, Inc.Method of controlling an irrigation/aspiration systemUS20110232358 *Sep 29, 2011Artsyukhovich Alexander NSurgical CassetteUSD698019Mar 5, 2013Jan 21, 2014Alcon Research, Ltd.Ophthalmic surgical cassette* Cited by examinerClassifications U.S. Classification604/319, 604/119, 604/320International ClassificationA61M1/00Cooperative ClassificationA61M1/0007, A61M1/0013, A61M2205/12, A61M1/0005, A61M2210/0612, A61M1/0035, A61M1/0031European ClassificationA61M1/00A6, A61M1/00H2Legal EventsDateCodeEventDescriptionJul 31, 2001REMIMaintenance fee reminder mailedJan 3, 2002SULPSurcharge for late paymentJan 3, 2002FPAYFee paymentYear of fee payment: 4Oct 20, 2003PRDPPatent reinstated due to the acceptance of a late maintenance feeEffective date: 20031023Jul 12, 2005FPAYFee paymentYear of fee payment: 8Jul 13, 2009REMIMaintenance fee reminder mailedJan 6, 2010LAPSLapse for failure to pay maintenance feesFeb 23, 2010FPExpired due to failure to pay maintenance feeEffective date: 20100106RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services