Patent US5284473A successfully refreshed from Google Patents.
US5284473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perfusion catheter with flow amplifier
Assignee: Medtronic Vascular Inc
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Filing: 1991-07-16
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Granted: 1994-02-08
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Expires: 2011-07-16
Abstract
Abstract A perfusion catheter is provided which increases the static pressure gradient across a portion of the catheter so that the flow through the catheter having the flow amplifier is greater than the flow through an unamplified catheter. A low pressure region is created at or downstream of the perfusion ports so that a greater volume of blood is drawn in and subsequently discharged through the distal end of the catheter.
Inventors
- 👤 Mark A. Calabria
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:09
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/104; A61M25/0043; A61M2025/0063; A61M25/0067; A61M25/0068; A61M2025/0073; A61M2025/1043; A61M2025/1095
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
182 words
A cardiovascular catheter comprising: an elongate flexible tubular shaft having a proximal end, a distal end and a main lumen extending from the proximal end to an outlet orifice at the distal end of the shaft; at least one side inlet port formed in a wall of the tubular shaft at a location proximally of the distal end, the side port being in communication with the main lumen, and means for developing a low-pressure region in the main lumen distally of said at least one side inlet port to amplify the rate of fluid flow drawn into said inlet port and through the main lumen of the catheter; said means for inducing a low pressure region comprising an elongate flexible tube having a proximal end and a distal end, the proximal end of said tube extending proximally of said catheter shaft, and the distal end of said tube is located between the outlet orifice of the catheter and distally of the side port; and a balloon located on the distal end of the shaft distally from said at least one side port.
Claim 2
Dependent Claim
182 words
A cardiovascular catheter comprising: an elongate flexible tubular shaft having a proximal end, a distal end and a main lumen extending from the proximal end to an outlet orifice at the distal end of the shaft; at least one side inlet port formed in a wall of the tubular shaft at a location proximally of the distal end, the side port being in communication with the main lumen, and means for developing a low-pressure region in the main lumen distally of said at least one side inlet port to amplify the rate of fluid flow drawn into said inlet port and through the main lumen of the catheter; said means for inducing a low pressure region comprising an elongate flexible tube having a proximal end and a distal end, the proximal end of said tube extending proximally of said catheter shaft, and the distal end of said tube is located between the outlet orifice of the catheter and distally of the side port; and a balloon located on the distal end of the shaft distally from said at least one side port.
Claim 3
Dependent Claim
163 words
A cardiovascular catheter comprising: an elongate flexible tubular shaft having a proximal end, a distal end and a main lumen extending from the proximal end to an outlet orifice at the distal end of the shaft; at least one side inlet port formed in a wall of the tubular shaft at a location proximally of the distal end, the side port being in communication with the main lumen, and means for developing a low-pressure region in the main lumen distally of said at least one side inlet port to amplify the rate of fluid flow drawn into said inlet port and through the main lumen of the catheter; said means for inducing a low pressure region comprising an elongate flexible tube having a proximal end and a distal end, the proximal end of said tube extending proximally of said catheter shaft, and the distal end of said tube is located between the outlet orifice of the catheter and distally of the side port;
Claim 4
Dependent Claim
163 words
A cardiovascular catheter comprising: an elongate flexible tubular shaft having a proximal end, a distal end and a main lumen extending from the proximal end to an outlet orifice at the distal end of the shaft; at least one side inlet port formed in a wall of the tubular shaft at a location proximally of the distal end, the side port being in communication with the main lumen, and means for developing a low-pressure region in the main lumen distally of said at least one side inlet port to amplify the rate of fluid flow drawn into said inlet port and through the main lumen of the catheter; said means for inducing a low pressure region comprising an elongate flexible tube having a proximal end and a distal end, the proximal end of said tube extending proximally of said catheter shaft, and the distal end of said tube is located between the outlet orifice of the catheter and distally of the side port;
Claim 5
Dependent Claim
139 words
A cardiovascular catheter comprising: an elongate flexible tubular shaft having a proximal end, a distal end and a main lumen extending from the proximal end to an outlet orifice at the distal end of the shaft; at least one side inlet port formed in a wall of the tubular shaft at a location proximally of the distal end, the side port being in communication with the main lumen, and means for developing a low-pressure region in the main lumen distally of said at least one side inlet port to amplify the rate of fluid flow drawn into said inlet port and through the main lumen of the catheter; and a balloon located on said shaft near the distal end of said shaft, wherein a proximal end of said balloon is located distally from said at least one side port.
Claim 6
Dependent Claim
139 words
A cardiovascular catheter comprising: an elongate flexible tubular shaft having a proximal end, a distal end and a main lumen extending from the proximal end to an outlet orifice at the distal end of the shaft; at least one side inlet port formed in a wall of the tubular shaft at a location proximally of the distal end, the side port being in communication with the main lumen, and means for developing a low-pressure region in the main lumen distally of said at least one side inlet port to amplify the rate of fluid flow drawn into said inlet port and through the main lumen of the catheter; and a balloon located on said shaft near the distal end of said shaft, wherein a proximal end of said balloon is located distally from said at least one side port.
Claim 7
Independent Claim
124 words
A method for increasing the rate of perfusion of blood from a blood vessel through a catheter disposed in the blood vessel to a location in the blood vessel downstream of the catheter comprising: providing a catheter having side ports formed in the wall of the catheter thereby to communicate the inner lumen of the catheter with blood in the blood vessel through the side ports; introducing a stream of a second liquid into the lumen of the catheter in a manner as to increase the velocity of fluid flow within the lumen of the catheter thereby lowering the static pressure within that region of the catheter thereby to draw fluid into the catheter through the side ports at an increased rate of flow.
Claim 8
Independent Claim
124 words
A method for increasing the rate of perfusion of blood from a blood vessel through a catheter disposed in the blood vessel to a location in the blood vessel downstream of the catheter comprising: providing a catheter having side ports formed in the wall of the catheter thereby to communicate the inner lumen of the catheter with blood in the blood vessel through the side ports; introducing a stream of a second liquid into the lumen of the catheter in a manner as to increase the velocity of fluid flow within the lumen of the catheter thereby lowering the static pressure within that region of the catheter thereby to draw fluid into the catheter through the side ports at an increased rate of flow.
References Cited (Backward Citations)
US3421510A
Cited
US3542031A
Cited
US3628532A
Cited
US4046492A
Cited
US4195780A
Cited
US4265237A
Cited
US4305339A
Cited
US4493696A
Cited
US4385728A
Cited
US4735606A
Cited
US4581017A
Cited
US4581017B1
Cited
US4555059A
Cited
US4755175A
Cited
US4881542A
Cited
US4753221A
Cited
US4857046A
Cited
US4857054A
Cited
US4930705A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-02-07 | 1997-08-09 | 1998-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-07 | 2001-08-09 | 2002-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-07 | 2005-08-09 | 2006-02-08 | $7700.00 | Window Closed / Lapsed |