Tapered multi-chamber balloon

• US 8,142,395 B2
• Filed: 08/03/2010
• Issued: 03/27/2012
• Est. Priority Date: 12/07/2005
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Thomas, Kory
• Primary Examiner(s): Lucchesi, Nicholas
• Assistant Examiner(s): Snyder, Melissa A
• Application Number:
  US12/849,607
• Publication Number:
  US 20100298860A1
• Time in Patent Office: 602 Days
• Field of Search: 604/103.07, 604/509, 604/101.01, 604/93.01, 604/96.01, 604/97.01, 604 9901- 9904
• US Class Current: 604/101.01
• CPC Class Codes: A61M 2025/1059 having different inflatable sections mainly depending on the response to the inflation pressure, e.g. due to different material properties with different compartments A61M2025/1072
• CPC Class Codes: A61M 2025/1072 having balloons with two or more compartments
• 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 25/1002 characterised by balloon shape A61M25/1006, A61M25/1009 take precedence
• CPC Class Codes: A61M 25/1011 Multiple balloon catheters
• CPC Class Codes: A61M 25/10185 Valves

Abstract

A catheter for carotid artery dilatation that includes a multi-chamber balloon assembly mounted at the distal end of the elongated tube that has at least two tandem chambers. Each chamber communicates with a separate lumen and each separate lumen terminates at the proximal end at a lumen valve head. The chambers have an inflated configuration with a diameter that progressively tapers in a direction from proximal to distal, said taper extends substantially continuously from the proximal end of the balloon assembly to the distal end thereof.

Claims

1. A catheter comprising

an elongated tube having proximal and distal ends and a plurality of lumens therethrough;

a multi-chamber balloon assembly mounted at the distal end of the elongated tube comprising at least two tandem chambers, each chamber communicating with a separate lumen and each separate lumen terminating at the proximal end at a single lumen valve;

each chamber having an inflated configuration with a diameter that progressively tapers in a direction from proximal to distal, said taper extending substantially continuously from the proximal end of the balloon assembly to the distal end thereof; and

a single lumen valve control for the single lumen valve having at least two modes of operation, wherein in a first mode of operation, the chambers are sequentially inflated from the chamber located most distally on the catheter to the chamber located most proximally on the catheter and in a second mode of operation the chambers are all inflated simultaneously.

2. The catheter of claim 1, wherein the multi-chamber balloon assembly has at least three tandem chambers.

3. The catheter of claim 1, wherein the multi-chamber balloon assembly has three tandem chambers and each chamber has a length in the range of from about 0.75 to about 1.75 cm.

4. The catheter of claim 3, wherein the balloon assembly tapers from a greatest diameter of about 10 mm at the proximal end of the most proximal chamber to a least diameter of about 4 mm at the distal end of the most distal chamber.

5. The catheter of claim 1, wherein the balloon material employed to form each of the chambers is the same.

6. The catheter of claim 5, wherein the balloon material is a semi-compliant plastic material.

7. The catheter of claim 1, wherein the single lumen valve control comprises a single rotatable knob with at least two positions.

8. The catheter of claim 7, wherein the single lumen valve control is rotated to a first position, the most distal chamber is inflated and wherein when the single lumen valve control is rotated to a second position, the chamber that is proximal to the most distal chamber is inflated.

9. The catheter of claim 8, wherein the single lumen valve control is rotated less than 90 degrees to the first position.

10. The catheter of claim 8, wherein when the single lumen valve control is further rotated to a third valve position, the most proximal chamber is inflated.

11. The catheter of claim 7, wherein the single lumen valve control comprises at least one safety stop on the single rotatable knob that engages with the post to prevent rotation of the knob beyond a desired point.

13. The catheter of claim 7, wherein in one position, the single lumen valve control operates in the first mode of operation and in another position, the single lumen valve control operates in the second mode of operation.

12. A catheter comprising:

an elongated tube having proximal and distal ends and a plurality of lumens therethrough; and

a multi-chamber balloon assembly mounted at the distal end of the elongated tube comprising three tandem chambers, each chamber communicating with a separate lumen and each separate lumen terminating at the proximal end at a lumen valve;

each chamber having a length in the range of from about 0.75 to about 1.75 cm;

each chamber having an inflated configuration with a diameter that progressively tapers in a direction from proximal to distal, said taper extending substantially continuously from the proximal end of the multi-chamber balloon assembly to the distal end thereof, wherein the balloon assembly tapers continuously from a greatest diameter of about 10 mm at the proximal end of the most proximal chamber to a least diameter of about 4 mm at the distal end of the most distal chamber, wherein the lumen valve has at least two modes of operation, wherein in a first mode of operation, the chambers are sequentially inflated from the chamber located most distally on the catheter to the chamber located most proximally on the catheter and in a second mode of operation, the chambers are all inflated simultaneously.