Valvuloplasty Catheter And Methods

• US 20110218564A1
• Filed: 05/16/2011
• Published: 09/08/2011
• Est. Priority Date: 10/10/2008
• Status: Active Grant

• Current Assignee: InterValve Medical, Inc.
• Original Assignee: InterValve, Inc. (Venus Medtech (Hangzhou), Inc.)
• Inventors: Drasler, William, Pedersen, Wes, Ungs, Mark
• Granted Patent: US 8,900,264 B2
• Time in Patent Office: Days
• US Class Current: 606/192
• CPC Class Codes: A61B 17/22012 in direct contact with, or very close to, the obstruction or concrement for removing obstructions in blood vessels by laser A61B18/245
• CPC Class Codes: A61B 2017/22098 Decalcification of valves
• CPC Class Codes: A61M 2025/0002 with a pressure sensor at the distal end
• CPC Class Codes: A61M 2025/1031 Surface processing of balloon members, e.g. coating or deposition; Mounting additional parts onto the balloon member's surface
• CPC Class Codes: A61M 2025/1047 having centering means, e.g. balloons having an appropriate shape
• CPC Class Codes: A61M 2025/1059 having different inflatable sections mainly depending on the response to the inflation pressure, e.g. due to different material properties
• CPC Class Codes: A61M 2025/1075 having a balloon composed of several layers, e.g. by coating or embedding
• CPC Class Codes: A61M 2025/1086 having a special balloon surface topography, e.g. pores, protuberances, spikes or grooves
• CPC Class Codes: A61M 2025/1088 having special surface characteristics depending on material properties or added substances, e.g. for reducing friction
• CPC Class Codes: A61M 25/1002 characterised by balloon shape A61M25/1006, A61M25/1009 take precedence
• CPC Class Codes: A61M 25/1011 Multiple balloon catheters
• CPC Class Codes: A61M 25/10186 One-way valves
• CPC Class Codes: A61M 25/10188 Inflation or deflation data displays
• CPC Class Codes: A61M 25/1029 Production methods of the balloon members, e.g. blow-moulding, extruding, deposition or by wrapping a plurality of layers of balloon material around a mandril
• CPC Class Codes: A61M 29/02 Dilators made of swellable material balloon catheters for angioplasty A61M25/104

Abstract

A valvuloplasty catheter has a dog-bone shaped balloon with semi-compliant smaller diameter waist and non-compliant larger diameter bulbous end regions. The balloon centers across the valve with the waist adjacent to the annulus. One bulbous region serves to hyperextend the valve leaflets and the other assists in stabilizing the balloon position to reduce migration. The semi-compliant waist increases in diameter as fluid enters the balloon until it comes into contact with the valve annulus. The pressure within the balloon per unit of volume delivery has a greater slope after contact with the annulus than before resulting in a change in slope for the pressure versus volume curve. The diameter of the balloon and annulus are determined at this inflection point when the balloon contacts the annulus.

Claims

1-53. -53. (canceled)

54. A method comprising:

providing a pressure system connectable to a catheter for fluid communication with a balloon disposed on a distal end of said catheter;

said pressure system expanding a first region of said balloon to a first diameter sized to dilate a first tissue member of the body;

said pressure system expanding a second region of said balloon; and

,

said pressure system determining contact between said second region of said balloon and a second tissue member of the body.

55. A method comprising:

providing a catheter;

providing a balloon disposed on said catheter;

providing a pressure system communicable with an interior of said balloon;

said pressure system executing software;

expanding a noncompliant region of said balloon to a diameter dilating valve leaflets;

displaying a change in pressure within said balloon;

expanding a semicompliant region of said balloon to a diameter contacting a valve annulus.

56. A method for dilating a narrowing in a tubular member of the body with a balloon dilatation catheter, the balloon dilatation catheter being connectable on its proximal end to a fluid delivery device for providing fluid volume to the balloon dilatation catheter, the method comprising:

advancing the balloon catheter having at least one balloon having a non-compliant region and a semi-compliant region to a position within the tubular member;

dilating a narrowing in the tubular member outward to a larger diameter with said non-compliant region;

said semi-compliant region then coming into contact with the tubular member wherein said semi-compliant region has a first diameter that is smaller than a second diameter of said non-compliant region.