Catheter with multiple ultrasound radiating members

• US 10,080,878 B2
• Filed: 07/11/2016
• Issued: 09/25/2018
• Est. Priority Date: 12/03/2001
• Status: Expired due to Term

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: EKOS Corporation (Boston Scientific Corporation)
• Inventors: Wilson, Richard R., Wilcox, Robert L., Genstler, Curtis, Abrahamson, Tim, Barrere, Wm. Gerrit, Cohen, Amy, Keilman, George, Oliver, Leonard R., Peskin, Natalya
• Primary Examiner(s): Price, Nathan R
• Assistant Examiner(s): Snyder, Melissa A
• Application Number:
  US15/207,371
• Publication Number:
  US 20170007815A1
• Time in Patent Office: 806 Days
• CPC Class Codes: A61B 17/2202 the ultrasound transducer being inside patient's body at the distal end of the catheter
• CPC Class Codes: A61B 2017/22084 stone- or thrombus-dissolving
• CPC Class Codes: A61B 2017/22088 ultrasound absorbing, drug activated by ultrasound
• CPC Class Codes: A61M 25/0029 characterized by features relating to least one lumen located at the middle part of the catheter, e.g. slots, flaps, valves, cuffs, apertures, notches, grooves or rapid exchange ports catheter shaft surface irregularities A61M2025/006
• CPC Class Codes: A61M 25/0032 characterized by at least one unconventionally shaped lumen, e.g. polygons, ellipsoids, wedges or shapes comprising concave and convex parts
• CPC Class Codes: A61M 37/0092 using ultrasonic, sonic or infrasonic vibrations, e.g. phonophoresis
• CPC Class Codes: A61N 2007/0078 with multiple treatment transducers
• CPC Class Codes: A61N 7/00 Ultrasound therapy lithotripsy A61B17/22, A61B17/225; massage using supersonic vibration A61H23/00 ; using ultrasound for introducing media into the body A61M37/0092

Abstract

A method of delivery ultrasonic energy and a therapeutic compound to a treatment site and an ultrasonic catheter system are disclosed. The ultrasonic catheter system comprises a tubular body having a proximal end, a distal end and a treatment zone located between the distal end and the proximal end, a fluid delivery lumen, at least one ultrasound radiating element positioned in the treatment zone, wiring electrically coupled to the at least one ultrasound radiating element and extending through the tubular body and terminating at a connector, and a control system comprising external circuitry and an isolation pod that is configured to be electrically connected to the connector, the isolation pod being positioned between the tubular body and the external system and comprising an isolation barrier and circuitry for driving the ultrasound radiating element.

Claims

1. An ultrasonic catheter comprising:

a tubular body having a proximal end, a distal end and a treatment zone located between the distal end and the proximal end;

a plurality of fluid delivery lumens defined within a wall of the tubular body and extending from the proximal end of the tubular body into the treatment zone;

an inner core comprising at least one ultrasound radiating element, the at least one ultrasound radiating element being positioned within the treatment zone;

a plurality of cooling fluid channels extending from a proximal end of the tubular body to the treatment zone, the plurality of cooling fluid channels being formed between an inner surface of the tubular body and an outer surface of the inner core, each cooling fluid channel being positioned generally radially between two fluid delivery lumens.

2. The ultrasonic catheter of claim 1, wherein the catheter includes three fluid delivery lumens.

3. The ultrasonic catheter of claim 1, wherein the catheter includes three cooling fluid channels.

4. The ultrasonic catheter of claim 1, wherein the three fluid delivery lumens spaced approximately 120 degrees radially apart from each other.

5. The ultrasonic catheter of claim 1 further including a control system comprising external circuitry and an isolation pod that is configured to be electrically connected to the inner core, the isolation pod being positioned between the tubular body and the control system and comprising an isolation barrier and circuitry for driving the ultrasound radiating element.

6. The ultrasonic catheter of claim 5, wherein the external circuitry provides a radio frequency signal to the isolation pod.

7. The ultrasonic catheter of claim 6, wherein the isolation pod includes a transformer for converting the radio frequency to a drive signal for driving the ultrasound radiating member.

8. The ultrasonic catheter of claim 5, wherein the isolation pod includes a transformer loop that is configured to measure leakage current through the tubular body.

9. The ultrasonic catheter of claim 5, wherein the isolation pod includes tuning circuitry that adjusts an input impedance based upon the activation of an ultrasound transducer.

10. The ultrasound catheter of claim 5, wherein the inner core comprises more than one ultrasound radiating elements.

11. The ultrasonic catheter of claim 5, wherein the ultrasonic catheter includes a memory device that stores information relating to the catheter.