Patent US5205818A successfully refreshed from Google Patents.
US5205818A
Expired / Lapsed
US
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Patency maintenance system
Assignee: Hospira Inc
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Filing: 1990-12-28
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Granted: 1993-04-27
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Expires: 2010-12-28
Abstract
Abstract A method and apparatus for maintaining the patency of a vein access device in which a dilute solution of an anticoagulant drug is slowly infused into the vein access device. The patency device includes a self-energized container and means for adding a medicament without disconnecting the patency device from the vein access device. In accordance with a preferred embodiment, a self-energized container delivers a heparin solution to the vein access device at a concentration from about 0.01 to about 0.99 international heparin units per milliliter of diluent at a flow rate from about 0.01 to about 1.0 milliliters per hour.
Inventors
- 👤 Chris M. Kolber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:21
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M2005/1401; A61M2005/1404; A61M25/00; A61M25/0017; A61M5/142; A61M5/14244; A61M5/14248
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
54 words
A method for maintaining the patency of an indwelling vein access device, comprising the step of delivering a heparin solution to the vein access device having a concentration from about 0.01 to about 0.99 international heparin units per milliliter of diluent and a flow rate from about 0.01 to about 1.0 milliliters per hour.
Claim 2
Independent Claim
54 words
A method for maintaining the patency of an indwelling vein access device, comprising the step of delivering a heparin solution to the vein access device having a concentration from about 0.01 to about 0.99 international heparin units per milliliter of diluent and a flow rate from about 0.01 to about 1.0 milliliters per hour.
Claim 3
Dependent Claim
17 words
The method as defined in claim 1 wherein the heparin solution is delivered from a self-energized container.
Claim 4
Independent Claim
46 words
A method for maintaining the patency of an indwelling vein access device, comprising the sep of delivering a dilute solution of an inticoagulant drug from a self-energized container into the vein access device at a flow rate from about 0.1 to about 1.0 milliliters per hour.
Claim 5
Independent Claim
46 words
A method for maintaining the patency of an indwelling vein access device, comprising the sep of delivering a dilute solution of an inticoagulant drug from a self-energized container into the vein access device at a flow rate from about 0.1 to about 1.0 milliliters per hour.
Claim 6
Dependent Claim
142 words
Apparatus for maintaining the patency of an indwelling vein access device, comprising: (a) a vein access device; (b) self-energized container means containing a dilute solution of an anticoagulant drug comprising heparin solution having a concentration from about 0.01 to about 0.99 international heparin units per milliliter of diluent in fluid communication with said vein access device for delivering said solution to said vein access device at a low flow rate from about 0.01 to about 1.0 milliliters per hour; (c) an access site disposed between said container means and said vein access device in fluid communication therewith for directing a medicament into said vein access device; and (d) a check valve disposed between said access site and said container means in fluid communication therewith for preventing medicament directed into said access device through said access site from flowing into said container means.
Claim 7
Dependent Claim
142 words
Apparatus for maintaining the patency of an indwelling vein access device, comprising: (a) a vein access device; (b) self-energized container means containing a dilute solution of an anticoagulant drug comprising heparin solution having a concentration from about 0.01 to about 0.99 international heparin units per milliliter of diluent in fluid communication with said vein access device for delivering said solution to said vein access device at a low flow rate from about 0.01 to about 1.0 milliliters per hour; (c) an access site disposed between said container means and said vein access device in fluid communication therewith for directing a medicament into said vein access device; and (d) a check valve disposed between said access site and said container means in fluid communication therewith for preventing medicament directed into said access device through said access site from flowing into said container means.
Claim 8
Dependent Claim
15 words
The apparatus as defined in claim 4 wherein said vein access device is a catheter.
Claim 9
Dependent Claim
23 words
The apparatus as defined in claim 4 wherein said self-energized container means is small enough to be releasably attached to a patient's arm.
References Cited (Backward Citations)
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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) | 1996-04-26 | 1996-10-26 | 1997-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-26 | 2000-10-26 | 2001-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-26 | 2004-10-26 | 2005-04-27 | $7700.00 | Window Closed / Lapsed |