US5911708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for uninterrupted delivery of radiographic dye
Assignee: Navilyst Medical Inc
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Filing: 1998-04-08
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Granted: 1999-06-15
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Expires: 2018-04-08
Abstract
Abstract A method and apparatus for injecting radiographic dye during angiography. A deformable holding chamber is interposed between a contrast dye bottle and a syringe manifold. A one-way valve and an integral disconnect/flow-stop are connected between the bottle and the holding chamber. A vent is provided in the holding chamber, which can include a second one-way valve. Squeezing and releasing the deformable chamber fills the chamber from the bottle. The holding chamber contains a floating baffle which acts as a shut off valve by plugging the chamber outlet if the chamber becomes empty. The syringe is used to withdraw dye from the holding chamber. If dye remains in the bottle after performance of the procedure, the disconnect/flow-stop fitting can be disconnected, and the dye can be saved.
Inventors
- 👤 Paul S. Teirstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:00
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/007; A61M5/14; A61M5/1412; A61M5/36; A61M5/40; A61M5/365
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
107 words
A fluid delivery system, comprising: a fluid reservoir, said fluid reservoir having an outlet; a deformable fluid holding chamber, said holding chamber having an inlet and an outlet; a fluid shut off valve in said holding chamber for shutting off said outlet of said holding chamber when said holding chamber becomes empty; a tubular conduit connecting said outlet of said reservoir in fluid flow communication with said inlet of said holding chamber; a one way valve connected in said tubular conduit, said one way valve permitting flow only from said reservoir to said holding chamber; and an air vent in fluid flow communication with said holding chamber.
Claim 2
Dependent Claim
107 words
A fluid delivery system, comprising: a fluid reservoir, said fluid reservoir having an outlet; a deformable fluid holding chamber, said holding chamber having an inlet and an outlet; a fluid shut off valve in said holding chamber for shutting off said outlet of said holding chamber when said holding chamber becomes empty; a tubular conduit connecting said outlet of said reservoir in fluid flow communication with said inlet of said holding chamber; a one way valve connected in said tubular conduit, said one way valve permitting flow only from said reservoir to said holding chamber; and an air vent in fluid flow communication with said holding chamber.
Claim 3
Dependent Claim
40 words
A fluid delivery system as recited in claim 1, further comprising a vent valve connected in fluid flow communication with said air vent, said vent valve being capable of selectively permitting air flow from said holding chamber to the atmosphere.
Claim 4
Dependent Claim
17 words
A fluid delivery system as recited in claim 2, wherein said vent valve is a manual valve.
Claim 5
Independent Claim
121 words
A method of injecting radiographic dye into a vascular system of a patient, said method comprising: providing a radiographic dye reservoir, a deformable dye holding chamber connected to said dye reservoir via a one way valve, a shut off valve within said holding chamber, and a vent on said holding chamber; squeezing said holding chamber to expel air from said holding chamber to the atmosphere through said vent; stopping flow through said vent; releasing said holding chamber to allow said holding chamber to expand and draw dye from said reservoir into said holding chamber through said one way valve; withdrawing dye from said holding chamber with a syringe; and dispensing dye from said syringe into a vascular system of a patient.
Claim 6
Independent Claim
121 words
A method of injecting radiographic dye into a vascular system of a patient, said method comprising: providing a radiographic dye reservoir, a deformable dye holding chamber connected to said dye reservoir via a one way valve, a shut off valve within said holding chamber, and a vent on said holding chamber; squeezing said holding chamber to expel air from said holding chamber to the atmosphere through said vent; stopping flow through said vent; releasing said holding chamber to allow said holding chamber to expand and draw dye from said reservoir into said holding chamber through said one way valve; withdrawing dye from said holding chamber with a syringe; and dispensing dye from said syringe into a vascular system of a patient.
Claim 7
Dependent Claim
35 words
A method of injecting radiographic dye as recited in claim 4, further comprising: providing a vent valve in fluid flow communication with said vent; and stopping said flow through said vent with said vent valve.
Claim 8
Dependent Claim
38 words
A method of injecting radiographic dye as recited in claim 4, further comprising: providing a manual vent valve in fluid flow communication with said vent; and stopping said flow through said vent by closing said manual vent valve.
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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) | 2002-06-14 | 2002-12-14 | 2003-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-06-14 | 2006-12-14 | 2007-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-06-14 | 2010-12-14 | 2011-06-15 | $7700.00 | Window Closed / Lapsed |