Catheter with multilayer tube

• US 6,471,673 B1
• Filed: 05/24/1999
• Issued: 10/29/2002
• Est. Priority Date: 10/27/1993
• Status: Expired due to Fees

• Current Assignee: Schneider (Europe) GmbH (Boston Scientific Corporation), Nelya Vidgop
• Original Assignee: Schneider (Europe) GmbH (Boston Scientific Corporation)
• Inventors: Kastenhofer, Gerhard
• Primary Examiner(s): Casler, Brian L.
• Assistant Examiner(s): RODRIGUEZ, CRIS LOIREN
• Application Number:
  US09/317,293
• Time in Patent Office: 1,254 Days
• Field of Search: 604/523, 604/264, 604/96-1-1, 600/433, 600/435, 606/192, 606/194, 428/36.91, 428/35.2, 156/242, 156/293, 156/244.11, 156/244.12, 156/294
• US Class Current: 604/103.06
• CPC Class Codes: A61M 2025/0047 the inner layer having a higher lubricity
• CPC Class Codes: A61M 25/0009 Making of catheters or other medical or surgical tubes
• CPC Class Codes: A61M 25/0045 multi-layered, e.g. coated coating materials A61L29/08
• CPC Class Codes: A61M 25/0054 with regions for increasing flexibility
• 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 25/1027 Making of balloon catheters
• 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: B29C 48/09 Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
• CPC Class Codes: B29C 48/18 the components being layers
• CPC Class Codes: B29L 2009/00 Layered products
• CPC Class Codes: B29L 2031/7542 Catheters
• CPC Class Codes: Y10T 428/1393 Multilayer [continuous layer]

Abstract

An interventional catheter for angioplasty and the like, comprising a catheter tube formed of two superposed layers of materials different from one another. The inner layer is comprised of a low friction nonkinkable material to avoid risk of clogging of a guide wire in the longitudinal lumen. The outer layer is comprised of a material with higher friction coefficient than the material forming the inner layer. The balloon is welded at its distal end to the outer layer of the catheter tube. The proximal end of the balloon is welded to a tube surrounding the catheter tube.

Claims

1. An intravascular catheter, comprising:

an elongate tube formed by coextruding inner and outer layers wherein the inner layer comprises a polymeric material having a first coefficient of friction and the outer layer comprises a polymeric material having a second coefficient of friction greater than the first coefficient of friction; and

a discrete balloon connected to a distal portion of the tube, the balloon connected to the tube by welding an end portion of the balloon to an outer surface of the tube.

2. An intravascular catheter as in claim 1, wherein the inner layer and the outer layer are congruent in length.

3. An intravascular catheter as in claim 1, wherein a distal end portion of the balloon is welded to the outer surface of the tube.

4. An intravascular catheter as in claim 1, wherein the outer layer comprises polyamide.

5. An intravascular catheter as in claim 1, wherein the inner layer comprises polyethylene.

6. An intravascular catheter as in claim 5, wherein the inner layer consists essentially of high-density polyethylene.

7. An intravascular catheter as in claim 5, wherein the outer layer comprises polyamide.