Patent US5207645A successfully refreshed from Google Patents.
US5207645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infusion pump, treatment fluid bag therefor, and method for the use thereof
Assignee: Medication Delivery Devices Inc
•
Filing: 1991-06-25
•
Granted: 1993-05-04
•
Expires: 2011-06-25
Abstract
Abstract An infusion pump for infusing a medical treatment fluid intravenously to a patient includes a collapsible treatment fluid bag juxtaposed with an inflatable drive fluid bladder confined between a pair of opposing containment members which cause the bladder to impinge against the bag as the bladder is inflated. A drive fluid pump controllably inflates the bladder, thereby displacing treatment fluid from the bag into an outlet tube affixed thereto which conveys the treatment fluid to the patient where it is received intravenously. The treatment fluid flow rate through the tube is controlled by increasing or decreasing the drive fluid pump output and consequently the pressure in the bladder in response to a pressure sensor in fluid communication with the bladder. Alternatively, the treatment fluid flow rate is adjusted by opening or closing the outlet tube by means of an occluder or restrictor positioned along the tube.
Inventors
- 👤 Stephen O. Ross
- 👤 Mark D. McWilliams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:16
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/142; A61M5/14244; A61M5/145; A61M5/148; A61M5/1483; A61M5/168; A61M5/16804; A61M5/16813; A61M5/172
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
86 words
A pump for infusing intravenous treatment fluid to a patient, said infusion pump comprising: a collapsible treatment fluid bag; an inflatable bladder juxtaposed with said treatment fluid bag; means to vent said bladder; means for impinging said bladder against said treatment fluid bag as said bladder is inflated; means for electronically controlling the pressure of said bladder so as to collapse said treatment fluid bag and controllably expel treatment fluid therefrom; and an outlet tube in fluid communication with said treatment fluid bag and said patient.
Claim 2
Dependent Claim
86 words
A pump for infusing intravenous treatment fluid to a patient, said infusion pump comprising: a collapsible treatment fluid bag; an inflatable bladder juxtaposed with said treatment fluid bag; means to vent said bladder; means for impinging said bladder against said treatment fluid bag as said bladder is inflated; means for electronically controlling the pressure of said bladder so as to collapse said treatment fluid bag and controllably expel treatment fluid therefrom; and an outlet tube in fluid communication with said treatment fluid bag and said patient.
Claim 3
Dependent Claim
18 words
A pump according to claim 1 wherein said outlet tube has a predetermined and substantially fixed cross-sectional area.
Claim 4
Dependent Claim
20 words
A pump according to claim 1 further comprising an occluder for selectively blocking treatment fluid flow across said outlet tube.
Claim 5
Dependent Claim
43 words
A pump according to claim 1 wherein said means for electronically controlling the pressure of said bladder comprises a pressure sensing means, in operative communication with a suitable electronic control circuit, which is, in turn, in operative communication with a drive fluid pump.
Claim 6
Dependent Claim
23 words
A pump according to claim 4 further comprising an internal power source for said means for electronically controlling the pressure of said bladder.
Claim 7
Dependent Claim
25 words
A pump according to claim 1 wherein said means for impinging comprises first and second opposing containment members confining said juxtaposed bladder and fluid bag.
Claim 8
Dependent Claim
30 words
A pump according to claim 6 wherein said first containment member has a rigid planar surface and said second containment member is a flexible sheet engaging said first containment member.
Claim 9
Dependent Claim
37 words
A pump according to claim 6 wherein said first containment member is a rigid base and said second containment member is a rigid cover plate removably engageable with said base to enclose said bag and bladder therein.
Claim 10
Dependent Claim
150 words
A portable pump for infusing intravenous treatment fluid to a patient, said infusion pump comprising: a collapsible treatment fluid bag; an inflatable bladder juxtaposed with said treatment fluid bag, wherein said bladder is in fluid communication with a pressure sensor; means for venting said bladder; a containment means for impinging said bladder against said treatment fluid bag as said bladder is inflated, said containment means comprising first and second opposing containment members confining said juxtaposed bladder and fluid bag; an electronic control assembly comprising a drive fluid pump in fluid communication with said bladder for inflating said bladder to collapse said treatment fluid bag and expel treatment fluid therefrom; wherein said drive fluid pump is also in fluid communication with an electronic control circuit, which is, in turn, in fluid communication with said pressure sensor; and an outlet tube in fluid communication with said treatment fluid bag and said patient.
Claim 11
Dependent Claim
150 words
A portable pump for infusing intravenous treatment fluid to a patient, said infusion pump comprising: a collapsible treatment fluid bag; an inflatable bladder juxtaposed with said treatment fluid bag, wherein said bladder is in fluid communication with a pressure sensor; means for venting said bladder; a containment means for impinging said bladder against said treatment fluid bag as said bladder is inflated, said containment means comprising first and second opposing containment members confining said juxtaposed bladder and fluid bag; an electronic control assembly comprising a drive fluid pump in fluid communication with said bladder for inflating said bladder to collapse said treatment fluid bag and expel treatment fluid therefrom; wherein said drive fluid pump is also in fluid communication with an electronic control circuit, which is, in turn, in fluid communication with said pressure sensor; and an outlet tube in fluid communication with said treatment fluid bag and said patient.
Claim 12
Dependent Claim
19 words
A portable pump according to claim 9 wherein said outlet tube has a predetermined and substantially fixed cross-sectional area.
Claim 13
Dependent Claim
21 words
A portable pump according to claim 9 further comprising an occluder for selectively blocking treatment fluid flow across said outlet tube.
Claim 14
Dependent Claim
30 words
A portable pump according to claim 11 further comprising a control circuit in communication with said occluder for directing opening and closing of said occluder as a function of time.
References Cited (Backward Citations)
US3153414A
Cited
US3468308A
Cited
US3543753A
Cited
US3640277A
Cited
US3640276A
Cited
US3895741A
Cited
US3966358A
Cited
US4048994A
Cited
US4090514A
Cited
US4205676A
Cited
US4237881A
Cited
US4332246A
Cited
US4337769A
Cited
US4416595A
Cited
US4430078A
Cited
US4507116A
Cited
US4551136A
Cited
US4539005A
Cited
US4613327A
Cited
US4657160A
Cited
US4673392A
Cited
US4666430A
Cited
US4626243A
Cited
US4714462A
Cited
US4718893A
Cited
US4778451A
Cited
US4857055A
Cited
US4781687A
Cited
US4735613A
Cited
US4955860A
Cited
US4950245A
Cited
US5013303A
Cited
US5061242A
Cited
US5053012A
Cited
US5053011A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-03 | 1996-11-02 | 1997-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-03 | 2000-11-02 | 2001-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-03 | 2004-11-02 | 2005-05-04 | $7700.00 | Window Closed / Lapsed |