Balloon catheter having metal balloon and method of making same

• US 20030028210A1
• Filed: 04/29/2002
• Published: 02/06/2003
• Est. Priority Date: 11/04/1999
• Status: Active Grant

• Current Assignee: Vactronix Scientific, LLC
• Original Assignee: Advanced Bio Prosthetic Surfaces, Ltd.
• Inventors: Banas, Christopher E., Palmaz, Julio C., Bailey, Steven R., Boyle, Christopher T.
• Granted Patent: US 6,733,513 B2
• Time in Patent Office: Days
• US Class Current: 606/192
• CPC Class Codes: A61B 2017/00862 elastic or resilient
• CPC Class Codes: A61B 2017/22054 with two balloons
• CPC Class Codes: A61B 2017/22098 Decalcification of valves
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: A61F 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2002/9583 Means for holding the stent on the balloon, e.g. using protrusions, adhesives or an outer sleeve
• CPC Class Codes: A61F 2210/0076 multilayered, e.g. laminated structures
• CPC Class Codes: A61F 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2230/006 Y-shaped
• CPC Class Codes: A61F 2310/00395 Coating or prosthesis-covering structure made of metals or of alloys
• CPC Class Codes: A61M 2025/1013 with concentrically mounted balloons, e.g. being independently inflatable
• 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 2025/105 having a balloon suitable for drug delivery, e.g. by using holes for delivery, drug coating or membranes
• 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 2025/1097 with perfusion means for enabling blood circulation only while the balloon is in an inflated state, e.g. temporary by-pass within balloon
• 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 25/1034 Joining of shaft and balloon
• CPC Class Codes: A61M 25/1038 : Wrapping or folding devices for use with balloon catheters
• CPC Class Codes: A61M 25/104 : used for angioplasty
• CPC Class Codes: G03F 7/0002 : Lithographic processes using patterning methods other than those involving the exposure to radiation, e.g. by stamping
• CPC Class Codes: Y10S 977/845 : Purification or separation of fullerenes or nanotubes

Abstract

A metal balloon catheter having a main tubular body, a metal balloon proximate a distal end of the main tubular body, a central annulus extending along an entire longitudinal aspect of the catheter for accommodating a guidewire therethrough and an inflation annulus adjacent the central annulus which extends along the longitudinal axis of the main tubular body and terminates in fluid flow communication with an inflation chamber of the metal balloon. The metal balloon catheter may be either unitary integral metal catheter in which the main tubular body and the balloon are fabricated of metal, or it may consist of a polymeric main tubular body and a metal balloon.

Claims

1. A balloon catheter comprising:

a. A catheter body member having a central lumen and an inflation lumen; and

b. A balloon diametrically extensible from the catheter body member under the influence of a fluid passing through the inflation lumen and into the balloon, wherein the balloon consists essentially of at least one metal.

2. The balloon catheter according to claim 1, wherein the at least one metal is selected from the group consisting of titanium, vanadium, aluminum, nickel, tantalum, zirconium, chromium, silver, gold, silicon, magnesium, niobium, scandium, platinum, cobalt, palladium, manganese, molybdenum and alloys thereof.

3. The balloon catheter according to claim 1, wherein the balloon has a wall thickness between about 3 μ

m and 10 μ

m.

4. The balloon catheter according to claim 1, wherein the balloon deflates under the influence of at least one of a shape memory, superelastic or elastic property of the at least one metal.

5. The balloon catheter according to claim 1 made by the method comprising the steps of:

a. Providing a generally cylindrical mandrel having an outer surface assuming a desired geometry for the balloon;

b. Vacuum depositing a metal onto the generally cylindrical mandrel thereby forming a film of metal having a geometry corresponding to the desired geometry of the balloon; and

c. Removing the formed balloon from the generally cylindrical mandrel.