US4267834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for flushing a medical fluid
Assignee: Baxter International Inc
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Filing: 1979-04-24
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Granted: 1981-05-19
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Expires: 1999-04-24
Abstract
Abstract A system for continuously administering parenteral liquid, such as normal saline, to a patient while blood pressure fluctuations are continuously monitored. The system includes a flushing valve with a manually squeezable and distortable elastic tube surrounding a flow restrictor. The flushing valve is connected through a flexible tube segment to a T-connector of the system to provide for convenient one hand flexible operation. The flushing valve, flexible tube segment, and T-connector are joined as a unit for assembling into the system.
Inventors
- 👤 Larry N. Barger
- 👤 Kenneth R. McCord
- 👤 Claude A. Vidal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:36
CPC Classifications
A; A61; A61M; A61M39/00; A61M39/22; A61M39/225
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
121 words
A system for flushing a medical fluid that includes a pressure wave tube for coupling a patient connector with a pressure transducer, and which includes a feed tube to continuously infuse fluid to a patient through a side port of the system, wherein the improvement comprises: a flushing valve connected to the feed tube and spaced from the side port by a flexible tube segment; and the flushing valve includes an elastically distortable tube having a noncircular outer surface, and a restriction in the tube which combines with the tube to form a restricted passage means having a predetermined flow rate therethrough, said tube being distortable to temporarily form a flush passage in the valve having a substantially faster flow rate.
Claim 2
Independent Claim
121 words
A system for flushing a medical fluid that includes a pressure wave tube for coupling a patient connector with a pressure transducer, and which includes a feed tube to continuously infuse fluid to a patient through a side port of the system, wherein the improvement comprises: a flushing valve connected to the feed tube and spaced from the side port by a flexible tube segment; and the flushing valve includes an elastically distortable tube having a noncircular outer surface, and a restriction in the tube which combines with the tube to form a restricted passage means having a predetermined flow rate therethrough, said tube being distortable to temporarily form a flush passage in the valve having a substantially faster flow rate.
Claim 3
Dependent Claim
20 words
A system as set forth in claim 1, wherein the flexible tube segment is less than 6 inches in length.
Claim 4
Dependent Claim
33 words
A system as set forth in claim 1, wherein the system has a T-connector that includes a side port and the flexible tube segment is secured to the side port of this T-connector.
Claim 5
Dependent Claim
36 words
A system as set forth in claim 3, wherein the T-connector is permanently connected to the flexible tube segment, and the flexible tube segment is in turn permanently connected to one end of the flushing valve.
Claim 6
Dependent Claim
30 words
A system as set forth in claim 4, wherein the flushing valve has a coupler at its opposite end to removably connect with the mating coupler on the feed tube.
Claim 7
Dependent Claim
13 words
A system as set forth in claim 3, wherein the T-connector is rigid.
Claim 8
Dependent Claim
35 words
A system as set forth in claim 3, wherein the T-connector has two ports in addition to its side port, and these two ports each have coupling means for joining the T-connector to the system.
Claim 9
Dependent Claim
23 words
A system as set forth in claim 7, wherein the two coupling ports are closed by removable protectors prior to assembling the system.
Claim 10
Dependent Claim
28 words
A system as set forth in claim 1, wherein the pressure wave tube has means other than the side port for injecting or extracting fluid from the system.
Claim 11
Dependent Claim
18 words
A system as set forth in claim 9, wherein the pressure wave tube includes a plurality of stopcocks.
Claim 12
Independent Claim
80 words
A system for flushing a medical fluid comprising: a T-connector having a pair of coupling ports for joining with a pressure wave conduit means, and also having a side port; a flexible tube segment joined to the T-connector's side port; and a flushing valve joined to the flexible tube segment and having a manually distortable elastic member with a noncircular outer surface, said elastic member sealingly engaging a flow restrictor and adapted to be distorted to form a flush passage.
Claim 13
Independent Claim
80 words
A system for flushing a medical fluid comprising: a T-connector having a pair of coupling ports for joining with a pressure wave conduit means, and also having a side port; a flexible tube segment joined to the T-connector's side port; and a flushing valve joined to the flexible tube segment and having a manually distortable elastic member with a noncircular outer surface, said elastic member sealingly engaging a flow restrictor and adapted to be distorted to form a flush passage.
Claim 14
Dependent Claim
17 words
A system as set forth in claim 11, wherein one coupling port includes a threaded retention collar.
Claim 15
Dependent Claim
21 words
A system as set forth in claim 11, wherein both coupling ports of the T-connector are closed by a removable protector.
Claim 16
Dependent Claim
38 words
A system as set forth in claim 11, wherein the flushing valve has a coupler at a location spaced from the valve's attachment to the flexible tube segment and the valve's coupler is closed by a removable protector.
Claim 17
Dependent Claim
21 words
A system as set forth in claim 11, wherein the flushing valve includes a restrictor with a continuously open bore therethrough.
Claim 18
Independent Claim
144 words
A system for flushing a medical fluid which comprises: a pressure wave tube; a patient connector joined to one end of the pressure wave tube; a pressure transducer joined to an opposite end of the pressure wave tube; a side port into the pressure wave tube; a fluid pressure source; a feed tube leading from the fluid pressure source to the side port; and a flushing valve between the fluid source and the side port to control fluid flow rate through the side port; and said flushing valve includes a flow restrictor having a slow flow bore therethrough, an elastic squeezable tube with a noncircular outer surface, said tube encasing the flow restrictor and which is distortable to temporarily form a flush passage for substantially faster flow, and a protector housing on the valve with side openings providing squeezable access to the elastic tube.
Claim 19
Independent Claim
144 words
A system for flushing a medical fluid which comprises: a pressure wave tube; a patient connector joined to one end of the pressure wave tube; a pressure transducer joined to an opposite end of the pressure wave tube; a side port into the pressure wave tube; a fluid pressure source; a feed tube leading from the fluid pressure source to the side port; and a flushing valve between the fluid source and the side port to control fluid flow rate through the side port; and said flushing valve includes a flow restrictor having a slow flow bore therethrough, an elastic squeezable tube with a noncircular outer surface, said tube encasing the flow restrictor and which is distortable to temporarily form a flush passage for substantially faster flow, and a protector housing on the valve with side openings providing squeezable access to the elastic tube.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-18 | 1984-11-17 | 1985-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-18 | 1988-11-17 | 1989-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-18 | 1992-11-17 | 1993-05-19 | $7700.00 | Window Closed / Lapsed |