Intravascular catheter with distal tip guide wire lumen

• US 5,571,087 A
• Filed: 03/07/1995
• Issued: 11/05/1996
• Est. Priority Date: 02/10/1992
• Status: Expired due to Term

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Ressemann, Thomas V., Keith, Peter T., Hackett, Steven S.
• Primary Examiner(s): RIMELL, SAMUEL G
• Application Number:
  US08/400,982
• Time in Patent Office: 609 Days
• Field of Search: 128/657, 128/658, 128/772, 606/191, 606/192, 606/194, 604/100, 604/101, 604/102, 604/103, 604/104, 604/96, 604/264, 604/280, 604/97
• US Class Current: 604/96.01
• CPC Class Codes: A61M 2025/0037 characterized by lumina being arranged side-by-side
• CPC Class Codes: A61M 2025/0047 the inner layer having a higher lubricity
• CPC Class Codes: A61M 2025/0063 having means, e.g. stylets, mandrils, rods or wires to reinforce or adjust temporarily the stiffness, column strength or pushability of catheters which are already inserted into the human body
• 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 2025/0183 Rapid exchange or monorail catheters
• CPC Class Codes: A61M 2025/1061 having separate inflations tubes, e.g. coaxial tubes or tubes otherwise arranged apart from the catheter tube
• CPC Class Codes: A61M 2025/1093 having particular tip characteristics
• CPC Class Codes: A61M 25/003 characterized by features relating to least one lumen located at the distal part of the catheter, e.g. filters, plugs or valves catheter tips A61M25/0067
• CPC Class Codes: A61M 25/0054 with regions for increasing flexibility
• CPC Class Codes: A61M 25/0068 Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
• CPC Class Codes: A61M 25/008 Strength or flexibility characteristics of the catheter tip
• CPC Class Codes: A61M 25/0662 Guide tubes
• CPC Class Codes: A61M 25/104 used for angioplasty

Abstract

A catheter for use in angioplasty includes a shaft formed from an elongated metallic tube and has an inflatable balloon at its distal end. A plastic tube connects a distal end of the metallic tube to a proximal end of the balloon. The metallic and plastic tubes thus define a lumen for providing inflation pressure to the balloon. A metallic core member is attached to the metallic tube and extends distally therefrom through the plastic tube and balloon. The distal end of the balloon is sealably secured to the core member. A tip body is connected to the core member distally of the balloon, with a short guide wire lumen being defined on the tip body. The guide wire lumen is adapted to slidably receive a guide wire which then extends along the catheter exteriorly of the balloon.

Claims

1. A balloon catheter comprising:

a proximal hypotube shaft portion having a proximal end and a distal end and having a lumen extending therethrough;

a distal shaft portion having a proximal end and a distal end, the proximal end of the plastic shaft portion being sealingly connected to the distal end of the hypotube shaft portion, the plastic shaft portion having an inner lumen extending therethrough, and the plastic shaft portion being more flexible than the hypotube shaft portion;

a core member having a proximal end and a distal end, the core member being secured to the hypotube shaft portion to extend distally therefrom through the inner lumen of the plastic shaft portion, and the distal end of the core member terminating distally of the distal end of the plastic shaft portion;

a balloon having a proximal waist and a distal waist, the proximal waist of the balloon being sealably connected to the distal end of the plastic shaft portion, the distal waist of the balloon terminating proximally of the distal end of the core member and being sealably connected thereto, and the interior of the balloon member being in fluid communication with the lumen of the hypotube shaft portion through the inner lumen of the plastic shaft portion;

a distal tip body secured to that portion of the core member extending distally of the distal waist of the balloon, the tip body including a short guide wire lumen therein which is adapted to slidably receive a guide wire therethrough; and

said distal tip body has a distal segment which has a tube defining the guide wire lumen, the axis of the tube being canted relative to the axis of the core member.