Side branch balloon
a technology of side branch and balloon, which is applied in the field of medical dilatation balloon catheters, can solve the problems of injury to the side branch, difficult to achieve the large dilatation of the ostium, and under-deployment of the ostium, so as to improve the ability to cross, improve the control of the physician, and improve the effect of “pushability”
Inactive Publication Date: 2015-03-05
TRIREME MEDICAL
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Benefits of technology
This patent describes a new type of balloon catheter that has improved strength and flexibility, particularly at the end of the catheter where it touches the patient's body. This design allows the catheter to better cross obstructions and minimize damage to the patient's blood vessels. The catheter is easy to control, with a beveled tip that can change direction to better navigate through tight spots. The shaft of the catheter is also designed to transmit torque, which helps the catheter move smoothly through narrow blood vessels. These improvements make the balloon catheter more effective for procedures such as angioplasty and stent placement.
Problems solved by technology
However, large ostium dilations are not easily achieved.
When using a regular sized balloon, the difference in diameter between the side-branch ostium and the side-branch can result in either over expansion in the side branch causing injury to the side branch or under-deployment in the ostium.
Two balloons, however, can cause anatomical deformation and excessive pressure in the main vessel.
Furthermore, struts and other stent components are not advantageously placed.
While short balloons could alleviate these problems, a short balloon would have a tendency to slip and lose its longitudinal position in the vessel.
Method used
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[0034]The present invention provides catheters and methods for their use with the improved ability to cross obstructions as they are advanced through a patient's vasculature, particularly the coronary vasculature. Obstructions which can be overcome by the catheters and methods of the present invention include tight turns, eccentric occlusions, and most particularly, stent struts present at a bifurcation. As discussed earlier, one or more struts which form part of a main vessel stent placed at a vessel bifurcation will often be located across the ostium leading into the side or branch vessel. The catheters and methods of the present invention are able to advance past such jailing stent struts in at least most cases.
[0035]The catheters and methods of the present invention may comprise and utilize various design elements which facilitate the catheter passage through obstructions. A first design element includes a beveled distal tip at a leading end of the catheter. The bevel will gener...
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An improved balloon catheter structure includes a beveled distal tip, a reinforced distal portion, and an elastic or split sleeve over at least a portion of the balloon. The balloon may have a short length and a marker at its midline. The catheters are particularly useful for crossing through stent walls at vessel bifurcations.
Description
CROSS-REFERENCE[0001]This application is a continuation of U.S. patent application Ser. No. 12 / 795,911 (Attorney Docket No. 32164-710.201, previously 022246-001510US), filed on Jun. 8, 2010, which claimed the benefit of Provisional Application No. 61 / 185,124 (Attorney Docket No. 022246-001500US), filed on Jun. 8, 2009, the full disclosure of which is incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to medical methods and devices, more specifically to medical dilatation balloon catheters.[0004]Balloon catheters often need to cross through luminal obstructions, such as stent struts, occlusions, and tight turns. One particular obstructions is encountered when treating stenosis present at an arterial bifurcation. Treatment of a bifurcation site is challenging since they are Y-shaped and require a different approach from a simple lesion treated with a regular cylindrical stent. When treating stenosis at bifurca...
Claims
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Login to View More IPC IPC(8): A61M25/10
CPCA61M25/10A61M2025/1093A61M2025/1081A61M2025/1079A61F2/958A61F2002/061A61F2002/9583A61M25/0068A61M25/0108A61M25/104A61M2025/0059A61M2025/1045A61M2025/1068
Inventor MATOV, NADIA P.DE LOS SANTOS, JAYSONPIVA, GUILLERMOFELD, TANHUMKONSTANTINO, EITAN
Owner TRIREME MEDICAL