US5141504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid recovery system with stopcock suction control
Assignee: Atrium Medical Corp
•
Filing: 1989-07-26
•
Granted: 1992-08-25
•
Expires: 2009-07-26
Abstract
Abstract A drainage device includes a vessel having a plurality of sub-chambers one of which is a regulated drainage collection chamber, and two of which cooperate to maintain a selected suction level in the drainage collection chamber. A stopcock proximate to the vessel communicates directly with the two cooperating sub-chambers, and allows quick adjustment and stable operation in varying environments. A float ball arrangement provides an indication of water loss that may compromise the water seal. The device is suitable for wound drainage, and may be used as a cardiotomy reservoir or a thoracic cavity drain device. Different embodiments collect blood for autologous infusion.
Inventors
- 👤 Steve A. Herweck
- 👤 Theodore Karwoski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:57
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/60; A61M1/61; A61M1/71; A61M1/79; A61M2205/00; A61M2205/33; A61M2205/3331; A61M2205/3348; A61M2205/59
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
196 words
A system for the collection of body fluid, comprising a collection vessel with an interior chamber, said chamber having at least first, second and third openings therein adapted for communication with the atmosphere, with a hospital vacuum source, and with a fluid collection tube, respectively, said chamber being subdivided to provide a buffered volume of at least first, second and third successive intercommunicating sub-chambers having said respective first, second and third openings therein, first and second water columns included in said first and second sub-chambers to define when filled with a quantity of fluid during normal operation first and second pressure differentials for establishing unidirectional flow from said first and third openings to said second opening while maintaining a desired subatmospheric pressure range in said third sub-chamber, said second opening being in direct fluid communication with a low pressure side of each of said first and second water columns, and a manually adjustable large bore stopcock at said second opening located proximate to said vessel between the second opening and a suction source, and defining together with said first water column parallel suction modulating controls for maintaining said desired subatmospheric pressure range in said third sub-chamber.
Claim 2
Independent Claim
196 words
A system for the collection of body fluid, comprising a collection vessel with an interior chamber, said chamber having at least first, second and third openings therein adapted for communication with the atmosphere, with a hospital vacuum source, and with a fluid collection tube, respectively, said chamber being subdivided to provide a buffered volume of at least first, second and third successive intercommunicating sub-chambers having said respective first, second and third openings therein, first and second water columns included in said first and second sub-chambers to define when filled with a quantity of fluid during normal operation first and second pressure differentials for establishing unidirectional flow from said first and third openings to said second opening while maintaining a desired subatmospheric pressure range in said third sub-chamber, said second opening being in direct fluid communication with a low pressure side of each of said first and second water columns, and a manually adjustable large bore stopcock at said second opening located proximate to said vessel between the second opening and a suction source, and defining together with said first water column parallel suction modulating controls for maintaining said desired subatmospheric pressure range in said third sub-chamber.
Claim 3
Dependent Claim
33 words
A system according to claim 1, further comprising a suction vessel constituting a fluid transfer vessel, and means for releasably interconnecting the transfer vessel and the third sub-chamber to receive collected fluid therefrom.
Claim 4
Dependent Claim
26 words
A system according to claim 1, wherein said body fluid is blood, and further comprising a fall-through filter in said third sub-chamber below said third opening.
Claim 5
Dependent Claim
20 words
A system according to claim 3, further comprising a closable outflow opening in a lower wall of said third sub-chamber.
Claim 6
Dependent Claim
18 words
A system according to claim 1, wherein the stopcock is rigidly affixed to an opening of said vessel.
Claim 7
Dependent Claim
64 words
A system according to claim 1, wherein said second water column includes a U-shaped water seal comprised of first and second arms and a water trap defining a seal between said first and second arms and further comprising a float ball which floats on water in said second arm, and means in said trap for preventing said float ball from passing through said trap.
References Cited (Backward Citations)
US3115138A
Cited
US3100490A
Cited
US3363626A
Cited
US3363627A
Cited
US3552395A
Cited
US3559647A
Cited
US3545440A
Cited
US3680560A
Cited
US4141361A
Cited
DE2148331A1
Cited
US3683913A
Cited
US3757783A
Cited
US3750692A
Cited
US3809085A
Cited
US3853128A
Cited
US3830238A
Cited
DE2351709A1
Cited
US3866608A
Cited
US3998227A
Cited
US4006745A
Cited
US4047526A
Cited
US4015603A
Cited
US4105031A
Cited
US4033345A
Cited
US4018224A
Cited
US4112948A
Cited
US4346703A
Cited
US4372336A
Cited
US4529402A
Cited
GB2141933A
Cited
US4460354A
Cited
US4439188A
Cited
US4429693A
Cited
US4439189A
Cited
US4424053A
Cited
US4445884A
Cited
US4430085A
Cited
US4443220A
Cited
US4402687A
Cited
US4544370A
Cited
EP0112641A1
Cited
US4540413A
Cited
US4519796A
Cited
US4559035A
Cited
US4605400A
Cited
US4601715A
Cited
US4698060A
Cited
US4664652A
Cited
US4631050A
Cited
US4767417A
Cited
US4781707A
Cited
US4747843A
Cited
US4738672A
Cited
US4828552A
Cited
US4838872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-08-25 | 1996-02-24 | 1996-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-25 | 2000-02-24 | 2000-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-25 | 2004-02-24 | 2004-08-25 | $7700.00 | Window Closed / Lapsed |