US6228072B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft for medical catheters
Assignee: Medtronic Vascular Inc
•
Filing: 1998-02-19
•
Granted: 2001-05-08
•
Expires: 2018-02-19
Abstract
Abstract Several improvements are provided in the design of a catheter shaft to reduce costs and improve performance. In one aspect, a small notch is fabricated into a catheter tube by a nonlaser process such as electric discharge machining (EDM) or mechanical grinding. This notch in the catheter tube is necessary for fluid communication between the catheter lumen and a balloon or other element in communication with the tube. Use of a nonlaser process reduces the costs of fabrication while ensuring a high degree of structure integrity. In another aspect, a method is provided to produce a nonuniform polymer coating on a catheter shaft to reduce friction and to maintain a catheter with a low profile. In another aspect, the catheter is provided with a radiopaque marker which is more visible and is more effective at identifying the location of a balloon. The marker is moved closer to a distal balloon by placing it within an adhesive taper adjacent the balloon.
Inventors
- 👤 Samuel L. Omaleki
- 👤 Roy Leguidleguid
- 👤 Ketan P. Muni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:16
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/1027; A61M25/1036; A61M25/104; A61M25/0043; A61M25/0045; A61M2025/0046; A61M2025/1043; A61M2025/1079
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
75 words
A catheter, comprising: an elongate body having proximal and distal sections; an expandable member mounted on the distal section of the tubular body, the expandable member having proximal and distal ends; a marker mounted on the distal section of the elongate body adjacent the proximal end of the expandable member; and a taper formed from the proximal end of the expandable member in a proximal direction to the elongate body and covering the distal marker.
Claim 2
Dependent Claim
75 words
A catheter, comprising: an elongate body having proximal and distal sections; an expandable member mounted on the distal section of the tubular body, the expandable member having proximal and distal ends; a marker mounted on the distal section of the elongate body adjacent the proximal end of the expandable member; and a taper formed from the proximal end of the expandable member in a proximal direction to the elongate body and covering the distal marker.
Claim 3
Dependent Claim
12 words
The catheter of claim 1 , wherein the marker is a tube.
Claim 4
Dependent Claim
11 words
The catheter of claim 1 , wherein the marker is radiopaque.
Claim 5
Dependent Claim
23 words
The catheter of claim 1 , wherein the marker is located within about 3 mm of the proximal end of the expandable member.
Claim 6
Dependent Claim
15 words
The catheter of claim 1 , wherein the taper is formed from a cyanoacrylate adhesive.
Claim 7
Dependent Claim
19 words
The catheter of claim 1 , wherein the marker has an outer diameter of at least about 0.020 inches.
Claim 8
Dependent Claim
24 words
A catheter, comprising: an elongate shaft; a radiopaque marker for locating a desired point on the shaft; and an adhesive taper covering the marker.
Claim 9
Dependent Claim
24 words
A catheter, comprising: an elongate shaft; a radiopaque marker for locating a desired point on the shaft; and an adhesive taper covering the marker.
Claim 10
Independent Claim
45 words
A method of locating a desired point on a catheter when inserted inside a human body, comprising the steps of: providing an elongate catheter shaft; providing a radiopaque marker located at the desired point on the catheter shaft; and forming a taper covering the marker.
Claim 11
Independent Claim
45 words
A method of locating a desired point on a catheter when inserted inside a human body, comprising the steps of: providing an elongate catheter shaft; providing a radiopaque marker located at the desired point on the catheter shaft; and forming a taper covering the marker.
References Cited (Backward Citations)
US3539674A
Cited
US4345602A
Cited
US4545390A
Cited
US4582181A
Cited
US4637396A
Cited
US4737219A
Cited
US5102390A
Cited
US4661094A
Cited
US4616653A
Cited
US4655746A
Cited
US4921483A
Cited
US4723936A
Cited
US4790315A
Cited
US4763654A
Cited
US4748982A
Cited
US4771777A
Cited
US4784636A
Cited
US5387225A
Cited
US5169386A
Cited
US5593718A
Cited
WO1991013649A1
Cited
US5593419A
Cited
WO1992000775A1
Cited
US5320604A
Cited
US5489277A
Cited
US5630806A
Cited
US5203777A
Cited
US5360397A
Cited
US5605543A
Cited
US5558652A
Cited
WO1996038193A1
Cited
EP0761253A2
Cited
EP0778037A1
Cited
EP0778042A2
Cited
WO1997044084A2
Cited
US5766202A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-05-07 | 2004-11-06 | 2005-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-05-07 | 2008-11-06 | 2009-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-05-07 | 2012-11-06 | 2013-05-08 | $7700.00 | Window Closed / Lapsed |