US5395334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balloon catheter with distal guide wire lumen
Assignee: Boston Scientific Scimed Inc
•
Filing: 1993-03-22
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Granted: 1995-03-07
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Expires: 2013-03-22
Abstract
Abstract An over-the-wire balloon dilatation catheter has a stainless steel hypotube catheter shaft, an intermediate sleeve section bonded to the shaft and a distal balloon section connected to the sleeve section. The sleeve section is formed from relatively flexible polymer materials and includes an inner core tube which defines a guide wire lumen extending only through a distal portion of the catheter (including its sleeve and balloon sections) to facilitate fast balloon catheter exchanges. A distal end of the hypotube shaft is crimped laterally and the core tube is nested and bonded within the crimp to provide a proximal outlet for the guide wire lumen. The hypotube shaft provides an inflation lumen for the balloon, with the inflation lumen being continued as an annular inflation lumen through the sleeve section where an outer sleeve is bonded about the core tube and extends from the distal end of the hypotube shaft to the balloon section. A kink-resistant coil structure extends distally from the distal end of the hypotube shaft to provide a gradual change in stiffness along the length of the catheter from the relatively stiff hypotube shaft to the relatively flexible distal portion of the catheter.
Inventors
- 👤 Peter T. Keith
- 👤 Charles L. Euteneuer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:49
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/104; A61M25/01; A61M25/06; A61M25/0662; A61M25/0021; A61M25/0023; A61M25/0026; A61M2025/0034; A61M25/0067; A61M25/0074; A61M2025/0079; A61M2025/0098; A61M2025/0183; A61M25/09; A61M2025/09191; A61M2025/1043; A61M2025/1056; A61M2025/1061; A61M2025/1079; A61M25/0029; A61M25/0032; A61M25/0043; A61M25/0054
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
229 words
In an elongate dilatation catheter of the type that can be slidably moved along a guide wire that can extend past a distal end of the catheter, wherein the guide wire is received in a guide wire lumen of the catheter, the guide wire extending from a distal guide wire lumen opening to a proximal guide wire lumen opening disposed in a portion of the catheter that is spaced distally from a proximal end of the catheter, the dilatation catheter including an inflatable balloon and an inflation lumen extending through the catheter separate from the guide wire lumen, an improvement comprising: a tube formed from a relatively stiff material composition, the tube defining a first shaft section having a proximal end and a distal end; a second shaft section disposed distally of the first shaft section, the second shaft section being relatively more flexible than the first shaft section and having the guide wire lumen extending through a portion thereof; and a transition section generally disposed between the first shaft section and the second shaft section, the transition section including a portion which is of diminished dimension relative to the tube such that at least the portion of the transition section is more flexible than the first shaft section, less flexible than the second shaft section, and extends at least in part across the proximal guide wire lumen opening.
Claim 2
Dependent Claim
229 words
In an elongate dilatation catheter of the type that can be slidably moved along a guide wire that can extend past a distal end of the catheter, wherein the guide wire is received in a guide wire lumen of the catheter, the guide wire extending from a distal guide wire lumen opening to a proximal guide wire lumen opening disposed in a portion of the catheter that is spaced distally from a proximal end of the catheter, the dilatation catheter including an inflatable balloon and an inflation lumen extending through the catheter separate from the guide wire lumen, an improvement comprising: a tube formed from a relatively stiff material composition, the tube defining a first shaft section having a proximal end and a distal end; a second shaft section disposed distally of the first shaft section, the second shaft section being relatively more flexible than the first shaft section and having the guide wire lumen extending through a portion thereof; and a transition section generally disposed between the first shaft section and the second shaft section, the transition section including a portion which is of diminished dimension relative to the tube such that at least the portion of the transition section is more flexible than the first shaft section, less flexible than the second shaft section, and extends at least in part across the proximal guide wire lumen opening.
Claim 3
Dependent Claim
15 words
The improved catheter of claim 1 wherein the tube is formed from a metallic material.
Claim 4
Dependent Claim
24 words
The improved catheter of claim 1 wherein the proximal guide wire lumen opening is disposed adjacent the proximal end of the second shaft section.
Claim 5
Dependent Claim
24 words
The improved catheter of claim 1 wherein the proximal guide wire lumen opening is disposed adjacent the distal end of the first shaft section.
Claim 6
Dependent Claim
221 words
In an elongate dilatation catheter which has an inflatable balloon and an inflation lumen extending through the catheter, wherein the catheter is of the type that can be slidably moved along a guide wire which can extend past a distal end of the catheter through a guide wire lumen of the catheter, wherein the guide wire lumen is separate from the inflation lumen and extends from a distal guide wire lumen opening to a proximal guide wire lumen opening disposed in a portion of the catheter that is spaced distally from a proximal end of the catheter so that the guide wire lumen is shorter than the inflation lumen, an improvement comprising: a first proximal shaft section of the catheter defined by a tubing of relatively rigid material; a second shaft section disposed distally of the first shaft section, the second shaft section being relatively more flexible than the first shaft section; and a transition section generally disposed between the first shaft section and the second shaft section and extending adjacent to the proximal guide wire lumen opening, the transition section having decreased rigidity intermediate the first and second shaft sections, to provide a stepped transition in flexibility between the first shaft section and the second shaft section, the transition section having a distal terminal end spaced proximally from the balloon.
Claim 7
Dependent Claim
221 words
In an elongate dilatation catheter which has an inflatable balloon and an inflation lumen extending through the catheter, wherein the catheter is of the type that can be slidably moved along a guide wire which can extend past a distal end of the catheter through a guide wire lumen of the catheter, wherein the guide wire lumen is separate from the inflation lumen and extends from a distal guide wire lumen opening to a proximal guide wire lumen opening disposed in a portion of the catheter that is spaced distally from a proximal end of the catheter so that the guide wire lumen is shorter than the inflation lumen, an improvement comprising: a first proximal shaft section of the catheter defined by a tubing of relatively rigid material; a second shaft section disposed distally of the first shaft section, the second shaft section being relatively more flexible than the first shaft section; and a transition section generally disposed between the first shaft section and the second shaft section and extending adjacent to the proximal guide wire lumen opening, the transition section having decreased rigidity intermediate the first and second shaft sections, to provide a stepped transition in flexibility between the first shaft section and the second shaft section, the transition section having a distal terminal end spaced proximally from the balloon.
Claim 8
Dependent Claim
16 words
The improved catheter of claim 5 in which the tubing is formed from a metallic material.
Claim 9
Dependent Claim
20 words
The improved catheter of claim 5 in which the transition section extends at least in part around the inflation lumen.
Claim 10
Dependent Claim
25 words
The improved catheter of claim 5 in which the proximal guide wire lumen opening is disposed adjacent the proximal end of the second shaft section.
Claim 11
Dependent Claim
25 words
The improved catheter of claim 5 in which the proximal guide wire lumen opening is disposed adjacent the distal end of the first shaft section.
Claim 12
Dependent Claim
289 words
In an elongate dilatation catheter of the type that has a relatively long proximal shaft section, a second shorter distal shaft section disposed distally of the first shaft section, an inflatable balloon attached to the distal end of the second shaft section wherein the first and second shaft sections have an inflation lumen defined therethrough so that the balloon is in fluid communication with the inflation lumen, and wherein the catheter is of the type that can be slidably moved along a guide wire which can extend through a guide wire lumen of the catheter, the guide wire lumen being separate from the inflation lumen and extending from a distal guide wire lumen opening at the distal end of the catheter to a proximal guide wire lumen opening adjacent the proximal end of the second shaft section so that the guide wire lumen is shorter than the inflation lumen, an improvement comprising: the first proximal shaft section of the catheter defined by a tubing of relatively rigid material; the second shaft section of the catheter being relatively more flexible than the first shaft section and having a relatively short reinforced proximal portion and a relatively long nonreinforced distal portion; and the reinforced proximal portion including a transition member disposed adjacent to the proximal guide wire lumen opening and extending distally along the second shaft section to provide a reinforcement therefor, the transition member including a metallic element having a uniform reduced dimension relative to the tubing as it extends distally along the catheter to provide a stepped transition in rigidity in the distal direction, the transition member having a distal terminal end spaced from the balloon by the length of the nonreinforced distal portion of the second shaft section.
Claim 13
Dependent Claim
289 words
In an elongate dilatation catheter of the type that has a relatively long proximal shaft section, a second shorter distal shaft section disposed distally of the first shaft section, an inflatable balloon attached to the distal end of the second shaft section wherein the first and second shaft sections have an inflation lumen defined therethrough so that the balloon is in fluid communication with the inflation lumen, and wherein the catheter is of the type that can be slidably moved along a guide wire which can extend through a guide wire lumen of the catheter, the guide wire lumen being separate from the inflation lumen and extending from a distal guide wire lumen opening at the distal end of the catheter to a proximal guide wire lumen opening adjacent the proximal end of the second shaft section so that the guide wire lumen is shorter than the inflation lumen, an improvement comprising: the first proximal shaft section of the catheter defined by a tubing of relatively rigid material; the second shaft section of the catheter being relatively more flexible than the first shaft section and having a relatively short reinforced proximal portion and a relatively long nonreinforced distal portion; and the reinforced proximal portion including a transition member disposed adjacent to the proximal guide wire lumen opening and extending distally along the second shaft section to provide a reinforcement therefor, the transition member including a metallic element having a uniform reduced dimension relative to the tubing as it extends distally along the catheter to provide a stepped transition in rigidity in the distal direction, the transition member having a distal terminal end spaced from the balloon by the length of the nonreinforced distal portion of the second shaft section.
Claim 14
Dependent Claim
16 words
The improved catheter of claim 10 in which the tubing is formed from a metallic member.
Claim 15
Dependent Claim
24 words
The improved catheter of claim 10 in which the transition member extends at least in part distally of the proximal guide wire lumen opening.
Claim 16
Dependent Claim
20 words
The improved catheter of claim 10 in which the transition member extends at least in part around the inflation lumen.
Claim 17
Dependent Claim
14 words
The improved catheter of claim 10 in which the transition member comprises a coil.
Claim 18
Dependent Claim
25 words
The improved catheter of claim 10 in which the proximal guide wire lumen opening is disposed adjacent the distal end of the first shaft section.
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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) | 1998-03-06 | 1998-09-05 | 1999-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-03-06 | 2002-09-05 | 2003-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-03-06 | 2006-09-05 | 2007-03-07 | $7700.00 | Window Closed / Lapsed |