Patent EP0111087A1 successfully refreshed from Google Patents.
EP0111087A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Medical suction drainage apparatus
Assignee: Sorenson Research Co Inc
•
Filing: 1983-10-06
•
Granted: —
•
Expires: 2003-10-06
Abstract
Abstract A suction drainage system for body cavities includes a suction collection container (22), and a disposable suction control chamber (30) through which an essentially constant level of suction is applied to a body cavity. Drained fluids flow into the suction collection container, into the suction control chamber through an elastomeric check valve (46) which precludes backflow of fluids to the patient. A pressure monitoring tube (64) in the suction control chamber has a lower end communicating with ambient pressure and an upper end communicating with the interior of the suction control chamber. A ball (68) in the tube rises to a level which is proportional to the negative pressure inside the suction control chamber. The suction control chamber (30) can be removably mounted to the collection container (22).
Inventors
- 👤 Robert H. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 15:22
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/60; A61M1/61; A61M1/71; A61M1/73; A61M1/732; A61M1/74; A61M1/742
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
129 words
A suction drainage system for draining liquid and gaseous fluids from a body cavity, said system comprising: means for collecting said fluids drained from said body cavity; means for establishing a first flow path between said body cavity and said means for collecting said drained fluids; means for establishing a second flow path between said means for collecting said fluids and a source of vacuum; means, disposed in said second flow path, for providing one-way flow of fluid from said means for collecting said fluids to a suction control chamber; and a suction control chamber having inlet and outlet openings connected in series in said second flow path, and wherein said means for providing one-way flow is disposed within said suction control chamber in series with said inlet opening.
Claim 2
Dependent Claim
129 words
A suction drainage system for draining liquid and gaseous fluids from a body cavity, said system comprising: means for collecting said fluids drained from said body cavity; means for establishing a first flow path between said body cavity and said means for collecting said drained fluids; means for establishing a second flow path between said means for collecting said fluids and a source of vacuum; means, disposed in said second flow path, for providing one-way flow of fluid from said means for collecting said fluids to a suction control chamber; and a suction control chamber having inlet and outlet openings connected in series in said second flow path, and wherein said means for providing one-way flow is disposed within said suction control chamber in series with said inlet opening.
Claim 3
Dependent Claim
55 words
The suction drainage system according to claim 1 wherein said means for providing one-way flow comprise an elastomeric member having and inlet and an outlet, and having two normally abutting opposed surfaces which are separable in response to application of a positive differential pressure established across said elastomeric member from its inlet to its outlet.
Claim 4
Dependent Claim
34 words
The suction drainage system according to claim 1 wherein said suction control chamber includes a sterile liquid disposed therein such that gaseous fluids from said one-way flow means are discharged through said sterile liquid.
Claim 5
Dependent Claim
49 words
The suction drainage system according to claim 1 wherein said suction control chamber includes an adjustable valve means, connected to said outlet opening of said suction control chamber, for providing an adjustable restrictor at said outlet opening, and means for venting said suction control chamber to the ambient pressure.
Claim 6
Dependent Claim
24 words
The suction drainage system according to claim 4 wherein said valve means includes a threaded bore and a screw which engages said threaded bore.
Claim 7
Dependent Claim
34 words
The suction drainage system according to claim 1 wherein said suction control chamber includes a flow restrictor connected to said outlet opening and means for venting said suction control chamber to the ambient pressure.
Claim 8
Dependent Claim
39 words
The suction drainage system according to claims 4 or 6 wherein said restrictor is sized so that gaseous flow through the restrictor is maintained at sonic velocity over a range of absolute pressure from zero to one-half an atmosphere.
Claim 9
Dependent Claim
52 words
The suction drainage system according to claim 7 wherein said means for venting the suction control chamber is sized slightly larger than said restrictor, whereby said restrictor and said means for venting the suction control chamber will provide in combination an essentially constant level of negative pressure inside said suction control chamber.
Claim 10
Dependent Claim
31 words
-The suction drainage system according to claim 1 further comprising pressure monitoring means disposed in said suction control chamber for providing an indication of the pressure in said suction control chamber.
Claim 11
Dependent Claim
90 words
The suction drainage system according to claim 9 wherein said pressure monitoring means comprises: a hollow tapered tube having first and second ends, said first end having an aperture which communicates with ambient pressure external to said suction control chamber, said second end being open and disposed within said suction control chamber; and a movable, pressure-responsive indicator disposed in said tube for assuming a position between said first and second tube ends which is proportional to the differential between said ambient pressure and the pressure within said suction control chamber.
Claim 12
Dependent Claim
30 words
The suction drainage system according to claim 10 wherein said pressure responsive indicator comprises a ball constructed and arranged to move in said tube in response to said pressure differential.
Claim 13
Dependent Claim
75 words
The suction drainage system according to claim 1 wherein said means for collecting said drained fluids comprises: a rigid outer canister; a disposable liner receiver inside of said canister, said liner receiver having a cover; and means for communicating negative pressure from said vacuum source to both the inside of said liner receiver and to the inside of said canister so as to maintain the liner receiver expanded when vacuum is applied to the system.
Claim 14
Dependent Claim
46 words
The suction drainage system according to claim 12 further comprising a one-way valve disposed downstream from said means for communicating said negative pressure to the inside of said canister, thereby preventing the loss of vacuum within said canister upon termination of suction from said vacuum source.
Claim 15
Dependent Claim
30 words
The suction drainage system according to claim 1 wherein said suction control chamber comprises means for removably attaching said suction control chamber to said means for collecting said drained fluids.
Claim 16
Dependent Claim
25 words
The suction drainage system according to claim 10 further comprising means for precluding said aperture from being occluded by a finger or other like object.
Claim 17
Dependent Claim
103 words
A suction control chamber for use in applying suction to a body cavity through a suction collection container, said suction control chamber comprising: an inlet and an outlet, said inlet being adapted to be connected in fluid flow communication with said collection container, said outlet being adapted to be connected in fluid flow communication with a source of suction; check valve means disposed at the inlet of said suction control chamber to permit one-way flow of fluids from said -inlet into said suction control chamber; and pressure monitoring means disposed in said suction control chamber for providing an indication of the pressure therein.
Claim 18
Dependent Claim
103 words
A suction control chamber for use in applying suction to a body cavity through a suction collection container, said suction control chamber comprising: an inlet and an outlet, said inlet being adapted to be connected in fluid flow communication with said collection container, said outlet being adapted to be connected in fluid flow communication with a source of suction; check valve means disposed at the inlet of said suction control chamber to permit one-way flow of fluids from said -inlet into said suction control chamber; and pressure monitoring means disposed in said suction control chamber for providing an indication of the pressure therein.
Claim 19
Dependent Claim
93 words
1 7 . The suction control chamber according to claim 16 wherein said pressure monitoring means comprises: a hollow tapered tube having first and second ends, said first end having an aperture which communicates with ambient pressure external to said suction control chamber, said second end being open and disposed within said suction control chamber; and a movable, pressure-responsive indicator disposed in said tube for assuming a position between said first and second tube ends which is proportional to the differential between said ambient pressure and the pressure within said suction control chamber.
Claim 20
Dependent Claim
22 words
The suction control chamber according to claim 16 Further comprising means for removably mounting said suction control chamber on said collection container.
Claim 21
Dependent Claim
43 words
The suction control chamber according to claim 16 further comprising adjustable valve means, connected to said outlet of said suction control chamber, for providing an adjustable restrictor at said outlet opening, and means for venting said suction control chamber to the ambient pressure.
Claim 22
Dependent Claim
34 words
The suction control chamber according to claim 16 further comprising a flow restrictor connected to said outlet of said suction control chamber, and means for venting said suction control chamber to the ambient pressure.
Claim 23
Dependent Claim
39 words
The suction control chamber according to claim 20 wherein said flow restrictor is sized so that gaseous flow through said restrictor is maintained at sonic velocity over a range of absolute pressure from zero to one half an atmosphere.
Claim 24
Dependent Claim
39 words
The suction control chamber according to claim 16 wherein said check valve means comprises an elastomeric member having two normally abutting opposed surfaces which are separable in response to a positive pressure differential established across the check valve means.
Claim 25
Dependent Claim
50 words
The suction control chamber according to claim 16 wherein the said check valve means comprises inlet and outlet ends and wherein said suction control chamber includes a sterile liquid disposed therein such that the outlet end of said check valve means is disposed under the level of said sterile liquid.
Claim 26
Dependent Claim
25 words
The suction control chamber according to claim 19 wherein said adjustable valve means include a threaded bore and a screw which engages said threaded bore.
Claim 27
Dependent Claim
52 words
The suction control chamber according to claim 21 wherein said means for venting said suction control chamber is sized slightly greater than said restrictor, whereby said restrictor and said means for venting the suction control chamber will provide in combination an essentially constant level of negative pressure inside said suction control chamber.
Claim 28
Dependent Claim
142 words
A suction control chamber for use in applying suction to a body cavity through a suction collection container, said suction control chamber comprising: an inlet and an outlet, said inlet being adapted to be connected in fluid flow communication with said collection container, said outlet being adapted to be connected in fluid flow communication with a source of suction; check valve means disposed at the inlet of said suction control chamber to permit one-way flow of fluids from said inlet into said suction control chamber; means for establishing an essentially constant level of negative pressure inside said suction control chamber; a sterile liquid disposed inside said suction control chamber such that gaseous fluids from said check valve means are discharged through said sterile liquid; and pressure monitoring means disposed in said suction control chamber for providing an indication of the pressure therein.
Claim 29
Dependent Claim
142 words
A suction control chamber for use in applying suction to a body cavity through a suction collection container, said suction control chamber comprising: an inlet and an outlet, said inlet being adapted to be connected in fluid flow communication with said collection container, said outlet being adapted to be connected in fluid flow communication with a source of suction; check valve means disposed at the inlet of said suction control chamber to permit one-way flow of fluids from said inlet into said suction control chamber; means for establishing an essentially constant level of negative pressure inside said suction control chamber; a sterile liquid disposed inside said suction control chamber such that gaseous fluids from said check valve means are discharged through said sterile liquid; and pressure monitoring means disposed in said suction control chamber for providing an indication of the pressure therein.
Claim 30
Dependent Claim
22 words
The suction control chamber according to claim 26 further comprising means for removably mounting said suction control chamber on said collection container.
Claim 31
Dependent Claim
39 words
The suction control chamber according to claim 26 wherein said check valve means comprises an elastomeric member having two normally abutting opposed surfaces which are separable in response to a positive pressure differential established across the check valve means.
Claim 32
Dependent Claim
49 words
The suction control chamber according to claim 26 wherein said means for establishing an essentially constant level of pressure inside said suction control chamber comprises a flow restrictor connected to said outlet of said suction control chamber, and means for venting said suction control chamber to the ambient pressure.
Claim 33
Dependent Claim
56 words
The suction control chamber according to claim 29 wherein said flow restrictor is sized so that gaseous flow through said restrictor is maintained at sonic velocity over a range of absolute pressure from zero to one half an atmosphere, and wherein said means for venting said suction control chamber is sized slightly greater than said retrictor.
Claim 34
Dependent Claim
92 words
The suction control chamber according to claim 26 wherein said pressure monitoring means comprises: a hollow tapered tube having first and second ends, said first end having an aperture which communicates with ambient pressure external to said suction control chamber, said second end being open and disposed within said suction control chamber; and a movable, pressure-responsive indicator disposed in said tube for assuming a position between said first ) and secibd tube ends which is proportional to the differential between said ambient pressure and the ! pressure within said suction control chamber.
References Cited (Backward Citations)
US3363626A
Cited
US3363627A
Cited
US3719197A
Cited
US3750692A
Cited
US4112948A
Cited
US4195633A
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.