US5968012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balloon catheter with adjustable shaft
Assignee: Boston Scientific Scimed Inc
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Filing: 1997-08-22
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Granted: 1999-10-19
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Expires: 2017-08-22
Abstract
Abstract The present invention provides a balloon catheter with a length compensator, which can be an accordion section or a slipping sleeve section. In the accordion section embodiment of the invention, the outer shaft of the catheter includes an accordion section positioned proximally of the balloon. In this embodiment the length compensator is comprised of the accordion section and the outer shaft between the accordion section and the point where the proximal end of the balloon is attached to the outer shaft. The distal end of the balloon is attached to an inner shaft. As the balloon is inflated the accordion section expands to adjust the axial length of the length compensator to compensate for the movement of the two ends of the balloon towards each other. In the slipping sleeve embodiment of the invention, the inner shaft of the catheter includes a slipping sleeve section positioned proximally of the point where the distal end of the balloon is connected to the inner shaft. As the balloon is expanded, the slipping sleeve section contracts, adjusting the axial length of the length compensator to compensate for the shrinkage of the balloon as it expands into contact with the vasculature.
Inventors
- 👤 Brooke Qin Ren
- 👤 Jon P. St. Germain
- 👤 Scott A. Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:39
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/104; A61M2025/1043; A61M2025/1068; A61M25/0043
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
122 words
A balloon catheter comprising: an elongate catheter body including first and second shafts and an inflation lumen, each shaft having proximal and distal ends; an inflatable balloon having first and second ends, the first end of the balloon being connected to the distal end of the first shaft and the second end of the balloon being connected to the distal end of the second shaft, the inflatable balloon being in fluid communication with the inflation lumen; the second shaft comprising a length compensator, the length compensator allowing a portion of the second shaft to move axially relative to the other portion to adjust the length of the second shaft as the balloon is inflated, which reduces the axial length of the balloon.
Claim 2
Dependent Claim
122 words
A balloon catheter comprising: an elongate catheter body including first and second shafts and an inflation lumen, each shaft having proximal and distal ends; an inflatable balloon having first and second ends, the first end of the balloon being connected to the distal end of the first shaft and the second end of the balloon being connected to the distal end of the second shaft, the inflatable balloon being in fluid communication with the inflation lumen; the second shaft comprising a length compensator, the length compensator allowing a portion of the second shaft to move axially relative to the other portion to adjust the length of the second shaft as the balloon is inflated, which reduces the axial length of the balloon.
Claim 3
Dependent Claim
80 words
The balloon catheter of claim 1 wherein the first shaft is an outer shaft and the second shaft is the inner shaft, the inner shaft being carried within the outer shaft and a portion of the inner shaft extending beyond the distal end of the outer shaft, and wherein the inflatable balloon has proximal and distal ends, the first end of the inflatable balloon being the proximal end and the second end of the inflatable balloon being the distal end.
Claim 4
Dependent Claim
39 words
The balloon catheter of claim 2 wherein the length compensator comprises an accordion section of the outer shaft positioned proximally to the inflatable balloon, wherein as the inflatable balloon expands the accordion section expands, thereby lengthening the outer shaft.
Claim 5
Dependent Claim
80 words
The balloon catheter of claim 1 wherein the second shaft is an outer shaft and the first shaft is the inner shaft, the inner shaft being carried within the outer shaft and a portion of the inner shaft extending beyond the distal end of the outer shaft, and wherein the inflatable balloon has proximal and distal ends, the first end of the inflatable balloon being the distal end and the second end of the inflatable balloon being the proximal end.
Claim 6
Dependent Claim
44 words
The balloon catheter of claim 4 wherein the length compensator comprises a slipping sleeve section of the inner shaft positioned proximally of the distal end of the balloon, wherein as the inflatable balloon expands the slipping sleeve section contracts, thereby shortening the inner shaft.
Claim 7
Dependent Claim
19 words
The balloon catheter of claim 1 wherein the catheter body is configured as a single operator exchange (SOE) catheter.
Claim 8
Dependent Claim
19 words
The balloon catheter of claim 1 wherein the catheter body is configured as an over the wire (OTW) catheter.
Claim 9
Dependent Claim
17 words
The balloon catheter of claim 1 wherein the catheter body is configured as a fixed wire catheter.
Claim 10
Dependent Claim
18 words
The balloon catheter of claim 1 wherein the length compensator includes an accordion section of the catheter body.
Claim 11
Dependent Claim
55 words
The balloon catheter of claim 9 wherein the accordion section is constructed of a material having a flexural modulus in the range of 40,000 to 250,000 psi, a hardness in the range of 50 D to 80 D, break tensile elongation above 50%, and a tensile strength in the range of 6,000 to 9,000 psi.
Claim 12
Dependent Claim
16 words
The balloon catheter of claim 10 wherein the accordion section is constructed of a polyolefin copolymer.
Claim 13
Dependent Claim
19 words
The balloon catheter of claim 1 wherein the length compensator includes a slipping sleeve section of the catheter body.
Claim 14
Dependent Claim
22 words
The balloon catheter of claim 1 wherein the balloon is a lesion molding balloon for obtaining a 3D image of the vasculature.
Claim 15
Dependent Claim
23 words
The balloon catheter of claim 13 wherein the balloon is constructed of a blend of polybutylene terephthalate (PBT) and glycol-modified polyethylene terephthalate (PETG).
Claim 16
Dependent Claim
20 words
The balloon catheter of claim 14 wherein the ratio of PBT to PETG ranges from 1:1 to 1:19 by weight.
Claim 17
Dependent Claim
17 words
The balloon catheter of claim 15 wherein the ratio of PBT to PETG is 1:3 by weight.
Claim 18
Dependent Claim
22 words
The balloon catheter of claim 1 wherein the balloon will deform 300-400% of the nominal diameter of the balloon at 1 atmosphere.
Claim 19
Dependent Claim
55 words
The balloon catheter of claim 17 wherein the accordion section is constructed of a material having a flexural modulus in the range of 40,000 to 250,000 psi, a hardness in the range of 50 D to 80 D, break tensile elongation above 50%, and a tensile strength in the range of 6,000 to 9,000 psi.
References Cited (Backward Citations)
US5316016A
Cited
US5466230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-10-18 | 2003-04-19 | 2003-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-10-18 | 2007-04-19 | 2007-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-10-18 | 2011-04-19 | 2011-10-19 | $7700.00 | Window Closed / Lapsed |