Braided body balloon catheter

• US 6,315,757 B1
• Filed: 05/19/1999
• Issued: 11/13/2001
• Est. Priority Date: 12/04/1995
• Status: Expired due to Term

• Current Assignee: Target Therapeutics, Inc. (Boston Scientific Corporation)
• Original Assignee: Target Therapeutics, Inc. (Boston Scientific Corporation)
• Inventors: Chee, Uriel Hiram, Engelson, Erik T., Samson, Gene
• Primary Examiner(s): Nguyen, Anhtuan T.
• Assistant Examiner(s): RODRIGUEZ, CRIS LOIREN
• Application Number:
  US09/314,568
• Time in Patent Office: 909 Days
• Field of Search: 604/523, 604/524, 604/527, 604/264, 604/96.01, 604/103.09, 600/435, 600/433, 606/192, 606/194
• US Class Current: 604/103.09
• CPC Class Codes: A61M 2025/0079 Separate user-activated means, e.g. guidewires, guide tubes, balloon catheters or sheaths, for sealing off an orifice, e.g. a lumen or side holes, of a catheter
• CPC Class Codes: A61M 2025/09183 having tools at the distal tip
• CPC Class Codes: A61M 25/005 with embedded materials for reinforcement, e.g. wires, coils, braids
• CPC Class Codes: A61M 25/0053 having a variable stiffness along the longitudinal axis, e.g. by varying the pitch of the coil or braid
• 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

Abstract

This is a balloon catheter having braided layer which extends generally from the proximal end of the catheter to a location distal of the balloon. In particular, it is desirable that the shaft of the catheter proximal of the balloon be stiffest at the proximal section and least stiff just proximal of the balloon. Although the catheter may be a single lumen catheter using some type of a core wire to act as a valve for inflation and deflation of the balloon, it is within the scope of the invention to include either a separate inflation/deflation lumen or one incorporated into the various concentric polymeric layers used to make up the proximal shaft. Particularly preferred is the use of an elastic, compliant balloon.

Claims

1. A balloon catheter assembly comprising:

a) an elongate tubular member having a distally located balloon portion having an inflatable balloon and a proximally located shaft portion having a proximal end and a distal end and a lubricious inner liner member,

b) a central lumen extending through both said balloon portion and said shaft portion and wherein said central lumen is not in fluid communication with said inflatable balloon, and

c) a woven braided member extending from the shaft portion proximal end to a point located distally of the balloon portion

wherein the lubricious inner liner member has an inner lumen forming the balloon catheter assembly central lumen and has an inflation passageway defined in an outer surface, the inflation passageway in fluid communication with the balloon portion, and

wherein an inner surface of the braided member is contiguous to the outer surface of the lubricious inner liner member such that the braided member is disposed exteriorly to the inflation passageway.

2. The balloon catheter of claim 1 wherein said outer surface of said central lumen defines more than one inflation passageway in fluid communication with the balloon portion.

3. The balloon catheter assembly of claim 1, wherein the woven braided member extending from the shaft portion proximal end to a point located distally of the balloon portion is in fluid communication with the balloon portion.

4. The balloon catheter assembly of claim 1, wherein the lubricious inner liner member extends distally of the balloon portion.

5. The balloon catheter assembly of claim 4, wherein the woven braided member extending from the shaft portion proximal end to a point located distally of the balloon portion is in fluid communication with the balloon portion.