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Publication Number
US-10898359-B2
Publication Date
2021-01-26
Expiration Date
Abstract
The present invention relates to a catheter comprising a balloon, wherein said catheter comprises the following: a dilatation body and a catheter shaft which comprises a proximal and a distal end; the catheter shaft additionally comprising a fluid lumen by means of which a fluid can be fed to said dilatation body. The dilatation body is made up of at least three balloon segments which are arranged immediately adjacently to one another and one being the other on said catheter shaft, and can be dilated independently of one another.
Core Innovation
A balloon catheter is provided for expanding an expandable endoluminal prosthesis. The catheter includes a catheter shaft with a proximal first end and a distal end, and the catheter shaft includes a fluid lumen via which a fluid can be delivered to a dilation body. The dilation body is mounted on the catheter shaft so that it is dilatable by delivery of a fluid.
The dilation body is formed by at least three balloon segments which are arranged immediately adjacent to one another and one behind the other on the catheter shaft. The balloon segments are dilatable independently of one another, and a sealing element is provided in the fluid lumen to control delivery of the fluid to and from the at least three balloon segments individually. The fluid lumen architecture supports delivering fluid to the respective balloon segments in a staged manner.
The balloon segments are mounted such that end portions are fixed on the catheter shaft while a central portion is free and dilatable. The balloon segments can have round or oval shapes or elongate shapes with opposing curvatures, and the balloons are described as non-compliant. Optional features include a guidewire lumen, variations in wall thickness, and optional coatings on balloon surfaces such as medicament or hydrophilic/heparin coatings.
The described system is used for releasing stents or stent grafts, including at curved vessel sites. It further provides for inserting the loaded catheter and dilating the balloon segments in sequence for prosthesis release, and also for balloon dilation in the treatment of angioplasty/stenosis without prosthesis release.
Claims Coverage
The claim set centers on a catheter having a dilation body with at least three independently dilatable balloon segments arranged immediately adjacent and in-line on a catheter shaft, where fluid delivery and individual control to each segment is governed by a sealing element in a fluid lumen. Dependent claims further define the fluid-lumen delivery architecture, balloon-segment structure and geometry, and use in prosthesis release at a curved vessel site.
At least three independently dilatable balloon segments arranged adjacent and in-line
The dilation body is formed by at least three balloon segments which are arranged immediately adjacent to one another and one behind the other on the catheter shaft and are dilatable independently of one another.
Sealing element in the fluid lumen for individual segment fluid control
A sealing element is provided in the fluid lumen, and the sealing element controls delivery of the fluid to and from the at least three balloon segments individually.
Catheter with a fluid lumen delivering fluid to the dilation body
A catheter shaft with a proximal first end and a distal end includes a fluid lumen via which a fluid can be delivered to the dilation body.
Single fluid lumen delivering fluid sequentially to balloon segments
The catheter is characterized by having a single fluid lumen that delivers fluid sequentially to the balloon segments.
Balloon segments mounted with fixed end portions and dilatable central portion
The balloon segments are mounted on the catheter shaft with end portions fixed to the catheter shaft while a central portion between the ends is free and dilatable by delivering a fluid.
Numerical range of balloon segments receiving fluid
The catheter is characterized by having between 3 and 15 balloon segments that receive fluid delivered through a fluid lumen.
Minimum balloon segment length constraints
An individual balloon segment has a length of at least 3 mm, in particular at least 5 mm and preferably at least 10 mm.
Release of an expandable endoluminal prosthesis at a curved vessel site
The method is characterized by releasing an expandable endoluminal prosthesis at a curved site within a vessel.
Overall, the claim set centers on a dilation body with at least three immediately adjacent, in-line, independently dilatable balloon segments, where a sealing element in a fluid lumen individually controls fluid delivery to each segment. Dependent claims further define a sequential single-lumen delivery arrangement, balloon mounting and geometry with fixed end portions and a dilatable central portion, numerical and dimensional constraints on the balloon segments, and narrowed use including prosthesis release at a curved vessel site.
Stated Advantages
Enables expansion of an expandable endoluminal prosthesis using a dilation body on a catheter shaft.
Provides independent dilation of at least three balloon segments.
Allows individual control of fluid delivery to and from each balloon segment via a sealing element.
Supports sequential dilation of balloon segments for prosthesis release.
Facilitates releasing stents or stent grafts, including at curved vessel sites.
Allows angioplasty/stenosis treatment without prosthesis release.
Documented Applications
Releasing an expandable endoluminal prosthesis, including stents or stent grafts, at a curved site within a vessel.
Treatment of angioplasty/stenosis without prosthesis release using staged dilation of balloon segments.
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