US5490838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of inserting a balloon catheter
Assignee: Cordis Corp
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Filing: 1994-08-23
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Granted: 1996-02-13
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Expires: 2014-08-23
Abstract
Abstract A balloon catheter defines a balloon having a cylindrical outer surface of a diameter essentially no greater than the diameter of the tubular shaft. Additionally, a method is disclosed in which one inserts a catheter into the arterial system of a patient, and increasingly pressurizes a balloon made of work-hardenable material to elastically expand the balloon to such a first pressure that sufficient work-hardening takes place in the expanding balloon to cause the diameter of the balloon to substantially cease its expansion in response to a pressure range increasing from the first pressure. One then terminates the increase of the pressure at that point to cause the catheter to assume a first, predetermined maximum diameter. Catheter balloons can each be expanded to two different, known, work-hardened diameters by this invention.
Inventors
- 👤 Jay F. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:19
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/104; A61M25/1027; A61M2025/1043; A61M2025/1059; A61M2025/1063; A61M25/1029
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
151 words
The method of inserting a catheter into the arterial system of a patient which comprises the steps of inserting said catheter into the arterial system of a patient; increasingly pressurizing a lumen of said catheter through a first pressure, to cause a portion of said catheter having a work-hardening capability and having a diameter to elastically expand to such a degree that sufficient work-hardening takes place under said pressure in the expanding catheter portion to cause the diameter of said catheter portion to substantially cease its expansion in response to a first pressure range increasing from said first pressure; and terminating the increase of said pressure in said first pressure range, whereby said catheter portion assumes a first, predetermined maximum diameter, said elastically expandable portion of said catheter being made of a plastic formulation selected from the group consisting of nylon and polyethylene materials having sufficient crystallinity to exhibit such work-hardening.
Claim 2
Independent Claim
151 words
The method of inserting a catheter into the arterial system of a patient which comprises the steps of inserting said catheter into the arterial system of a patient; increasingly pressurizing a lumen of said catheter through a first pressure, to cause a portion of said catheter having a work-hardening capability and having a diameter to elastically expand to such a degree that sufficient work-hardening takes place under said pressure in the expanding catheter portion to cause the diameter of said catheter portion to substantially cease its expansion in response to a first pressure range increasing from said first pressure; and terminating the increase of said pressure in said first pressure range, whereby said catheter portion assumes a first, predetermined maximum diameter, said elastically expandable portion of said catheter being made of a plastic formulation selected from the group consisting of nylon and polyethylene materials having sufficient crystallinity to exhibit such work-hardening.
Claim 3
Dependent Claim
27 words
The method of claim 1 in which the work-hardenable portion of said catheter elastically expands to at least double its diameter with pressurization of about 10-12 atm.
Claim 4
Dependent Claim
24 words
The method of claim 2 in which said catheter portion, prior to being elastically expanded, has a diameter of no more than 0.03 inch.
Claim 5
Dependent Claim
24 words
The method of claim 1 in which said catheter portion, prior to being elastically expanded, has a diameter of no more than 0.03 inch.
Claim 6
Independent Claim
190 words
The method of inserting a catheter into the arterial system of a patient which comprises the steps of inserting said catheter into the arterial system of a patient; increasingly pressurizing a lumen of said catheter through a first pressure, to cause a portion of said catheter having a work-hardening capability and having a diameter to elastically expand to such a degree that sufficient work-hardening takes place under said pressure in the expanding catheter portion, to cause the diameter of said catheter portion to substantially cease its expansion in a first pressure range increasing from said first pressure; and terminating the increase of said pressure in said first pressure range, whereby said catheter portion assumes a first, predetermined, maximum diameter; and thereafter increasingly pressurizing said catheter lumen through a higher second pressure to cause said catheter portion to resume said elastic expansion and where the diameter of said catheter portion again substantially ceases to expand with increasing pressure in a second pressure range increasing from said second pressure, and again terminating the increase of said pressure in said second pressure range, whereby said catheter portion assumes a second, predetermined maximum diameter.
Claim 7
Independent Claim
190 words
The method of inserting a catheter into the arterial system of a patient which comprises the steps of inserting said catheter into the arterial system of a patient; increasingly pressurizing a lumen of said catheter through a first pressure, to cause a portion of said catheter having a work-hardening capability and having a diameter to elastically expand to such a degree that sufficient work-hardening takes place under said pressure in the expanding catheter portion, to cause the diameter of said catheter portion to substantially cease its expansion in a first pressure range increasing from said first pressure; and terminating the increase of said pressure in said first pressure range, whereby said catheter portion assumes a first, predetermined, maximum diameter; and thereafter increasingly pressurizing said catheter lumen through a higher second pressure to cause said catheter portion to resume said elastic expansion and where the diameter of said catheter portion again substantially ceases to expand with increasing pressure in a second pressure range increasing from said second pressure, and again terminating the increase of said pressure in said second pressure range, whereby said catheter portion assumes a second, predetermined maximum diameter.
Claim 8
Dependent Claim
29 words
The method of claim 2 in which the work-hardenable portion of said catheter elastically expands to at least double its diameter with pressurization of about 10 to 12 atm.
Claim 9
Dependent Claim
24 words
The method of claim 2 in which said balloon is made of a plastic formulation selected from the group consisting of nylon and polyethylene.
Claim 10
Dependent Claim
24 words
The method of claim 2 in which said catheter portion, prior to being elastically expanded, has a diameter of no more than 0.03 inch.
Claim 11
Dependent Claim
24 words
The method of claim 6 in which said balloon is made of a plastic formulation selected from the group consisting of nylon and polyethylene.
Claim 12
Dependent Claim
24 words
The method of claim 7 in which said catheter portion, prior to being elastically expanded, has a diameter of no more than 0.03 inch.
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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) | 1999-02-12 | 1999-08-14 | 2000-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-12 | 2003-08-14 | 2004-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-12 | 2007-08-14 | 2008-02-13 | $7700.00 | Window Closed / Lapsed |