Therapeutic ultrasound system

• US 10,722,262 B2
• Filed: 10/05/2018
• Issued: 07/28/2020
• Est. Priority Date: 08/02/2002
• Status: Expired due to Term

• Current Assignee: Flowcardia Inc. (Becton, Dickinson & Co)
• Original Assignee: Flowcardia Inc. (Becton, Dickinson & Co)
• Inventors: Nita, Henry
• Primary Examiner(s): Hall, Deanna K
• Application Number:
  US16/152,632
• Publication Number:
  US 20190029711A1
• Time in Patent Office: 662 Days
• CPC Class Codes: A61B 17/22012 in direct contact with, or very close to, the obstruction or concrement for removing obstructions in blood vessels by laser A61B18/245
• 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 17/320068 using mechanical vibrations, e.g. ultrasonic A61B17/22012 takes precedence; dental tooth drilling devices operated by vibration A61C3/03; removing intra-ocular material using mechanical vibrations A61F9/00745
• CPC Class Codes: A61B 2017/00331 with preformed bends
• CPC Class Codes: A61B 2017/00477 Coupling A61B2017/0046 takes precedence
• CPC Class Codes: A61B 2017/00867 shape memory effect
• CPC Class Codes: A61B 2017/22014 the ultrasound transducer being outside patient's body; with an ultrasound transmission member; with a wave guide; with a vibrated guide wire not applied in A61B17/22012
• CPC Class Codes: A61B 2017/22015 with details of the transmission member
• CPC Class Codes: A61B 2017/22038 with a guide wire
• CPC Class Codes: A61B 2017/22039 eccentric
• CPC Class Codes: A61B 2017/320069 for ablating tissue
• CPC Class Codes: A61B 2017/32007 with suction or vacuum means
• CPC Class Codes: A61B 2017/320088 with acoustic insulation, e.g. elements for damping vibrations between horn and surrounding sheath

Abstract

A method of assembling an ultrasound catheter includes providing an elongated catheter body having a proximal end, a distal end, and at least one lumen extending longitudinally therethrough; coupling a proximal housing to the proximal end of the elongated catheter body, the proximal housing having a distal bore; inserting an ultrasound transmission member through the lumen of the catheter body; positioning a sonic connector on the proximal end of the ultrasound transmission member for connecting the ultrasound transmission member to a separate ultrasound generating device at a connection location, the sonic connector having a proximal section and a front portion, the proximal portion provided for connection to the separate ultrasound generating device; connecting the front portion of the sonic connector to the proximal end of the ultrasound transmission member; and retaining an absorber inside the distal bore of the proximal housing wherein the absorber substantially surrounds the ultrasound transmission member.

Claims

1. A method of assembling an ultrasound catheter, comprising:

providing an elongated catheter body having a proximal end, a distal end, and at least one lumen extending longitudinally therethrough;

coupling a proximal housing to the proximal end of the elongated catheter body, the proximal housing having a distal bore;

inserting an ultrasound transmission member longitudinally through the lumen of the catheter body;

positioning a sonic connector on the proximal end of the ultrasound transmission member for connecting the ultrasound transmission member to a separate ultrasound generating device at a connection location, the sonic connector having a proximal section and a front portion, the proximal portion provided for connection to the separate ultrasound generating device;

connecting the front portion of the sonic connector to the proximal end of the ultrasound transmission member; and

retaining an absorber inside the distal bore of the proximal housing wherein the absorber substantially surrounds the ultrasound transmission member.

2. The method of claim 1, wherein the absorber is a single component, the method further comprising positioning the absorber within an area one-quarter wavelength from the sonic connector.

3. The method of claim 1, wherein the absorber has two or more components, the method further comprising positioning the two or more components within an area of one quarter wavelength from the sonic connector.

4. The method of claim 1, comprising positioning a distal end of the ultrasound transmission member at the distal end of the catheter body.

5. The method of claim 1, wherein the absorber substantially surrounding the ultrasound transmission member is configured to absorb transverse motions of the ultrasound transmission member.

6. The method of claim 1, comprising positioning the absorber such that a portion of the absorber abuts a surface of the sonic connector.

7. The method of claim 1, comprising positioning the absorber such that a portion of the absorber abuts a distal facing surface of the sonic connector.

8. The method of claim 1, wherein the sonic connector further includes a central portion extending proximally from the front portion, the method comprising coupling the central portion of the sonic connector to the housing.

9. The method of claim 1, comprising crimping together the front portion of the sonic connector and the ultrasound transmission member.

10. A method of assembling an ultrasound catheter, comprising:

providing an elongated catheter body having a proximal end, a distal end, and at least one lumen extending longitudinally therethrough;

coupling a proximal housing to the proximal end of the elongated catheter body, the proximal housing having a distal bore;

longitudinally extending an ultrasound transmission member through the lumen of the catheter body;

positioning a sonic connector on the proximal end of the ultrasound transmission member for connecting the ultrasound transmission member to an ultrasound generating device at a connection location, the sonic connector comprising a proximal section and a front portion, the proximal section being for connection to the ultrasound generating device;

connecting the front portion of the sonic connector to the proximal end of the ultrasound transmission member; and

positioning a plurality of O-rings to substantially surround the ultrasound transmission member inside the distal bore of the proximal housing.

11. The method of claim 10, comprising positioning the plurality of O-rings within an area one-quarter wavelength from the sonic connector.

12. The method of claim 10, wherein the plurality of O-rings seat tightly around the ultrasound transmission member.

13. The method of claim 10, wherein the plurality of O-rings impacts micro-transverse motion vibrations of the ultrasound transmission member.

14. The method of claim 10, comprising positioning the plurality of O-rings such that at least one of the plurality of O-rings abuts a surface of the sonic connector.

15. The method of claim 10, comprising positioning the plurality of O-rings such that at least one of the plurality of O-rings abuts a distal facing surface of the sonic connector.