Puncture resistant balloon catheter

• US 5,620,649 A
• Filed: 10/11/1995
• Issued: 04/15/1997
• Est. Priority Date: 11/29/1989
• Status: Expired due to Term

• Current Assignee: Cordis Corporation (Cardinal Health, Inc.)
• Original Assignee: Cordis Corporation (Cardinal Health, Inc.)
• Inventors: Trotta, Thomas
• Primary Examiner(s): Timm, Catherine
• Application Number:
  US08/540,781
• Time in Patent Office: 552 Days
• Field of Search: 264/515, 264/171.28, 604/96, 606/194, 428/35.7, 428/36.6, 428/36.91, 215/12.1, 215/12.2
• US Class Current: 264/515
• CPC Class Codes: A61M 2025/1075 having a balloon composed of several layers, e.g. by coating or embedding
• CPC Class Codes: A61M 2025/1084 having features for increasing the shape stability, the reproducibility or for limiting expansion, e.g. containments, wrapped around fibres, yarns or strands
• CPC Class Codes: A61M 25/10 Balloon catheters A61M25/0125 takes precedence; embolectomy A61B17/22032; retractors A61B17/02; inflatable balloons for placing stents or stent-grafts A61F2/958 ; stomach balloons for treatment of obesity A61F5/0003; oesophagal tubes A61J15/00
• 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 25/104 used for angioplasty

Abstract

A balloon catheter comprises a flexible, elongated member, an inflatable balloon carried on the elongated member to define an inflated chamber within the balloon, and an inflation conduit extending along the member and communicating with the inflation chamber. The inflatable balloon, in turn, defines a wall which comprises at least three bonded layers. A first pair of the layers comprises a flexible plastic material which is typically a condensation polymer. A second of the layers comprises a flexible polymer which is typically a vinylic polymer which is covalently bonded to the first layers and positioned between them.

Claims

1. A method for manufacturing a medical balloon catheter which comprises the steps of:

providing a tubular catheter comprised of nylon;

extruding a tubular, three layer plastic parison under conditions to provide a unitary parison having at least three bonded plastic layers of flexible plastic material;

said three layer parison comprising a pair of tubular nylon layers which surround a tubular intermediate layer made of a copolymer of a major amount of ethylene and a minor amount of an unsaturated carboxylic acid or an anhydride thereof;

thereafter placing said parison into a blow mold;

thereafter expanding the diameter of said parison by causing the plastic thereof to stretch through internal blow molding pressure, said expanded diameter parison comprising a medical balloon; and

thereafter attaching said medical balloon to an end of said tubular catheter.