Apparatus and methods for the selective removal of tissue using combinations of ultrasonic energy and cryogenic energy

• US 7,572,268 B2
• Filed: 10/13/2005
• Issued: 08/11/2009
• Est. Priority Date: 10/13/2005
• Status: Expired due to Fees

• Current Assignee: Bacoustics LLC
• Original Assignee: Bacoustics LLC
• Inventors: Babaev, Eilaz P.
• Primary Examiner(s): Manahan; Todd E
• Assistant Examiner(s): YABUT, DIANE D
• Application Number:
  US11/250,870
• Publication Number:
  US 20070088217A1
• Time in Patent Office: 1,398 Days
• Field of Search: 606169-170, 606/20
• US Class Current: 606/169
• CPC Class Codes: A61B 17/22004 using mechanical vibrations, e.g. ultrasonic shock waves A61B17/225 takes precedence
• CPC Class Codes: A61B 18/0206 ultrasonic, e.g. for destroying tissue or enhancing freezing
• CPC Class Codes: A61B 18/0218 with open-end cryogenic probe, e.g. for spraying fluid directly on tissue or via a tissue-contacting porous tip
• CPC Class Codes: A61B 2017/320069 for ablating tissue
• CPC Class Codes: A61B 2017/320089 node location
• CPC Class Codes: A61B 2018/0262 using a circulating cryogenic fluid

Abstract

An ultrasonic apparatus and method is provided for the selective and targeted removal of unwanted tissues. The apparatus and methods may utilize combinations of ultrasonic and cryogenic energy for the selective removal tissue. The apparatus generates and delivers to the tissue cryogenic and ultrasonic energy either in combination or in sequence, provides resize ablation of unwanted tissue parts, and may be used on various body tissues including internal organs.

Claims

1. An apparatus comprising:

a. an ultrasound tip, comprising;

i. a body defining a chamber;

ii. a tube in communication with the chamber;

iii. a distal end;

iv. one or a plurality of orifices connected to the chamber in the distal end; and

v. an ice ball, that is separate and distinct from the tissue selected for treatment, on the distal end of the ultrasound tip through which ultrasonic energy is delivered to the tissue; and

b. an ultrasonic transducer connected to the ultrasound tip through an ultrasound horn.

2. The apparatus of claim 1, wherein the ultrasonic transducer operates at a frequency between 18 KHz and 60 MHz.

3. The apparatus of claim 1, wherein the ultrasonic transducer operates at a frequency between 20 KHz and 100 KHz.

4. The apparatus of claim 1, wherein the ultrasonic transducers operates at about a 35 KHz frequency.

5. The apparatus of claim 1, wherein the amplitude of the ultrasonic wave is between 1 micron and 300 microns.

6. The apparatus of claim 1, wherein the amplitude of the ultrasonic wave is about 50 microns.

7. The apparatus of claim 1, wherein the distal end is rounded.

8. The apparatus of claim 1, wherein the distal end is flat.

9. The apparatus of claim 1, wherein the distal end is a sharp cone.

10. The apparatus of claim 1, wherein the ultrasound tip'"'"'s distal end has a sharp edge.

11. The apparatus of claim 1, wherein the ultrasound tip'"'"'s distal end has a toothed edge.

12. The apparatus of claim 1, wherein the ultrasound tip'"'"'s distal end is concave.

13. The apparatus of claim 1, further comprising a lumen passing through the center of the ultrasonic transducer.

14. A method for removing tissue from a patient, comprising:

a. providing an ultrasonic transducer having an ultrasonic tip, comprising;

i. a body defining a chamber;

ii. a tube in communication with the chamber;

iii. a distal end;

iv. one or a plurality of orifices connected to the chamber in the distal end; and

v. an ice ball, that is separate and distinct from the tissue, on the distal end of the ultrasonic tip;

b. delivering a cryogenic fluid into the chamber of the ultrasonic tip through the tube in communication with the chamber;

c. delivering cryogenic energy from the ultrasonic tip to the tissue through the ice ball on the distal end of the ultrasonic tip;

d. exciting the ultrasonic tip; and

e. delivering ultrasonic energy from the ultrasonic tip to the tissue through the ice ball on the distal end of the ultrasonic tip.