US5211627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter and method for infusion of aerated liquid
Assignee: CR Bard Inc
•
Filing: 1991-02-12
•
Granted: 1993-05-18
•
Expires: 2011-02-12
Abstract
Abstract A catheter having a lumen for delivering air and a lumen for delivering fluid, such as water. Each lumen extends from the proximal end to the distal end of the catheter. An opening is formed between the air and fluid lumens adjacent the distal end to allow communication between the lumens to allow mixing of the air and fluid. A syringe having a fluid barrel and an air barrel is connected to the catheter to communicate with the respective fluid and air lumens.
Inventors
- 👤 Howat L. William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:51
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0021; A61M25/0023; A61M25/0026; A61M25/003; A61M2025/004
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
125 words
Apparatus for injecting an aerated stream of liquid into a body cavity, comprising: a catheter having a distal end portion for insertion into a body cavity, a proximal end portion remote from said distal end portion, first and second lumens extending from said proximal end portion to said distal end portion, and an opening formed at said distal end portion between said first and second lumens to provide communication therebetween; and a syringe connected to said proximal end of said catheter, said syringe having first and second barrels communicating with said respective first and second lumens, and first and second plungers mechanically linked together and situated in said first and second barrels for simultaneously infusing air and liquid into said first and second lumens, respectively.
Claim 2
Dependent Claim
125 words
Apparatus for injecting an aerated stream of liquid into a body cavity, comprising: a catheter having a distal end portion for insertion into a body cavity, a proximal end portion remote from said distal end portion, first and second lumens extending from said proximal end portion to said distal end portion, and an opening formed at said distal end portion between said first and second lumens to provide communication therebetween; and a syringe connected to said proximal end of said catheter, said syringe having first and second barrels communicating with said respective first and second lumens, and first and second plungers mechanically linked together and situated in said first and second barrels for simultaneously infusing air and liquid into said first and second lumens, respectively.
Claim 3
Dependent Claim
35 words
An apparatus as recited in claim 1, wherein said first lumen is for receiving and delivering air from said first barrel and said second lumen is for receiving and delivering water from said second barrel.
Claim 4
Dependent Claim
25 words
A catheter as recited in claim 2, wherein the internal diameter of said second barrel is greater than the internal diameter of said first barrel.
Claim 5
Dependent Claim
23 words
A catheter as recited in claim 2, wherein the volume of said second barrel is greater than the volume of said first barrel.
Claim 6
Dependent Claim
23 words
A catheter as recited in claim 4, wherein the length of said second barrel is greater than the length of said first barrel.
Claim 7
Dependent Claim
27 words
A catheter as recited in claim 2, further comprising a plunger attached to said proximal end of the syringe for simultaneously purging said first and second barrels.
Claim 8
Independent Claim
50 words
A method of aerating a liquid in an ultrasonic diagnostic procedure comprising the steps of injecting air and liquid through separate lumens of a catheter, mixing the air and liquid at a distal end portion of the catheter, and injecting the aerated liquid through the catheter into a body cavity.
Claim 9
Independent Claim
50 words
A method of aerating a liquid in an ultrasonic diagnostic procedure comprising the steps of injecting air and liquid through separate lumens of a catheter, mixing the air and liquid at a distal end portion of the catheter, and injecting the aerated liquid through the catheter into a body cavity.
References Cited (Backward Citations)
US2112160A
Cited
US3470869A
Cited
US3828980A
Cited
US3968796A
Cited
US4040420A
Cited
US4265251A
Cited
US4318402A
Cited
US4260077A
Cited
US4442843A
Cited
US5024615A
Cited
US4405313A
Cited
US4568329A
Cited
US4692141A
Cited
US4805628A
Cited
US4583968A
Cited
US4631055A
Cited
SU1323082A1
Cited
US4610666A
Cited
US4808155A
Cited
US4676778A
Cited
US4863716A
Cited
US4807625A
Cited
US4846405A
Cited
US4978336A
Cited
US4874368A
Cited
US5015232A
Cited
US5029580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-17 | 1996-11-16 | 1997-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-17 | 2000-11-16 | 2001-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-17 | 2004-11-16 | 2005-05-18 | $7700.00 | Window Closed / Lapsed |