Balloon catheter with delivery side holes

• US 6,440,097 B1
• Filed: 10/06/1995
• Issued: 08/27/2002
• Est. Priority Date: 10/06/1995
• Status: Expired due to Term

• Current Assignee: Target Therapeutics, Inc. (Boston Scientific Corporation)
• Original Assignee: Target Therapeutics, Inc. (Boston Scientific Corporation)
• Inventors: Kupiecki, David
• Primary Examiner(s): Jastrzab, Jeffrey R.
• Application Number:
  US08/539,943
• Time in Patent Office: 2,517 Days
• Field of Search: 604/33, 604/52, 604/53, 604/96, 604/99, 604/101-103, 604/167, 604/170, 604/246, 604/249, 604/271, 604/280, 606/191-197, 128/656-658, 128/772
• US Class Current: 604/509
• CPC Class Codes: A61B 17/12022 Occluding by internal devices, e.g. balloons or releasable wires plugging an opening in the wall of an organ A61B17/0057; occluders for the cervical canal A61F6/146; vas deferens occluders A61F6/20
• CPC Class Codes: A61B 17/12109 in a blood vessel
• CPC Class Codes: A61B 17/12136 Balloons
• CPC Class Codes: A61B 17/12186 liquid materials adapted to be injected
• CPC Class Codes: A61B 2017/1205 Introduction devices
• CPC Class Codes: A61M 2025/1052 for temporarily occluding a vessel for isolating a sector
• CPC Class Codes: A61M 2025/1063 having only one lumen used for guide wire and inflation, e.g. to minimise the diameter
• CPC Class Codes: A61M 25/0075 Valve means
• CPC Class Codes: A61M 25/104 used for angioplasty

Abstract

This is a medical catheter made up of a body having on its distal end portion an expandable balloon and, proximal of the balloon, a delivery lumen ending in a port through which therapeutic or diagnostic agents may be delivered. In one variation, a single inflation/wire lumen extends from the catheter proximal end to the catheter distal end, through which the balloon is inflated with pressurized fluid and through which a guide wire extends. The guide wire may have a valve plug for selectively seating against a valve seat of the catheter distal end to seal the inflation/wire lumen for balloon inflations. In another variation, a vaso-occlusive agent is disposable within a delivery lumen in a catheter coupled with a steerable guidewire. The delivery lumen ends in a delivery port near to and proximal of an expandable balloon located at the catheter'"'"'s end. A single inflation/wire lumen may also be provided for facilitating both balloon inflation and guide wire, tracking.

Claims

1. A medical catheter for use with a wire which is adapted to slideably pass through a distal wire port in said catheter, said medical catheter comprising:

a body having a distal end portion comprising an expandable balloon, an open distal wire port distal to the balloon, and a distal delivery port proximal to the balloon, said body further having

a proximal end portion comprising a proximal inflation/wire port and a proximal delivery port,

an inflation/wire lumen formed from a first independent tubing and extending between said distal wire port and said proximal inflation/wire port and being in fluid communication with said expandable balloon, said inflation/wire lumen being adapted to slideably receive a wire, and

a delivery lumen formed from a second independent tubing and extending between said proximal and distal delivery ports.

2. A medical catheter as described in claim 1, further comprising:

a tip portion between said distal wire port and said expandable balloon; and

a wire being slideably disposable at least in part within said inflation/wire lumen and comprising a valve plug adapted to close said tip portion such that said inflation/wire lumen is sealed against flow beyond said expandable balloon and through said distal wire port when said inflation/wire lumen is pressurized with fluid.

3. A medical catheter as described in claim 2, wherein said wire has a shapeable tip and is torquable.

4. A vaso-occlusive agent delivery assembly for use with a wire which is adapted to slideably pass through a distal wire port in a medical catheter, said medical catheter comprising:

a catheter body having a distal end portion with an expandable balloon, a proximal end portion with an inflation port fluidly coupled to said balloon through a first passageway formed from a first independent tubing in said catheter body, a wire lumen with a distal wire port disposed distally of said balloon and a proximal wire port disposed proximally of said balloon, and a delivery port disposed proximally of said balloon; and

a pressurizable vaso-occlusive agent source fluidly coupled to said delivery port through a second passageway formed from a second independent tubing in said catheter body.

5. A vaso-occlusive agent delivery assembly as described in claim 4, wherein said vaso-occlusive agent source contains a material selected from the group consisting of ethanol, estrogen, polyvinyl acetate, ethylene vinyl alcohol, cellulose acetate polymer, collagen, or derivatives or combinations thereof.

6. A vaso-occlusive agent delivery assembly as described in claim 4, wherein said inflation port is fluidly coupled to said balloon at least in part through said wire lumen.

7. A vaso-occlusive agent delivery assembly as described in claim 4, further comprising:

a tip portion of said catheter body between said distal wire port and said balloon; and

a wire being slideably disposable at least in part within said wire lumen and comprising a valve plug adapted to close said tip portion such that said wire lumen is sealed against flow beyond said balloon and through said distal wire port when said wire lumen is pressurized with fluid.

8. The vaso-occlusive agent delivery assembly of claim 4, wherein said first passageway comprises at least in part said wire lumen.

9. A method for delivering a vaso-occlusive agent to a desired occlusion site in the body, comprising the steps of:

placing an expandable balloon, located at a first end of a catheter, distally beyond a desired occlusion site in a vessel having a vessel wall;

expanding the balloon through a first independent tubing to engage the vessel wall and thereby secure the balloon; and

delivering a vaso-occlusive agent through a delivery lumen formed from a second independent tubing of the catheter, out a distal delivery port on the catheter located proximal to the balloon, and into the desired occlusion site.

10. A method for delivering a vaso-occlusive agent to a desired occlusion site in the body as described in claim 9, the method further comprising the following step:

sealing a distal wire port of an inflation/wire lumen in the catheter with a valve that couples a portion of a wire disposed within the inflation/wire lumen with a portion of the catheter, thereby fluidly coupling the balloon with a pressurizable inflation source through the inflation/wire lumen.

11. A method for delivering a vaso-occlusive agent to a desired occlusion site in the body as described in claim 10, wherein the balloon is expanded such that fluid communication through a body space externally disposed about the catheter is blocked between the distal wire port and the distal delivery port.

12. A method for delivering a vaso-occlusive agent to a desired occlusion site in the body as described in claim 9, the method further comprising the following steps:

coupling a fluid source to the delivery lumen; and

injecting a vaso-occlusive fluid or suspension from the fluid source, through the delivery lumen, out the delivery port, and into the desired occlusion site.

13. A method for isolating a desired site in the body for fluid communication with a lumen in a catheter, the method comprising the following steps:

placing a first port on a catheter, being in communication with a first lumen formed from a first independent tubing of the catheter, near the desired site to be isolated;

sealing a second port on the catheter, being in communication with a second lumen formed from a second independent tubing in the catheter, with a valve portion on a guide wire; and

pressurizing fluid in the second lumen to expand a balloon on the catheter which is located between the first and second ports such that fluid communication through the space external to the catheter is obstructed between the first and second ports.