Ultrasonic and interventional catheter and method

• US 5,325,860 A
• Filed: 11/08/1991
• Issued: 07/05/1994
• Est. Priority Date: 11/08/1991
• Status: Expired due to Term

• Current Assignee: Mayo Foundation For Medical Education And Research (Mayo Clinic)
• Original Assignee: Mayo Foundation For Medical Education And Research (Mayo Clinic)
• Inventors: Tajik, Abdul J., Seward, James B.
• Primary Examiner(s): JAWORSKI, FRANCIS J
• Application Number:
  US07/790,580
• Time in Patent Office: 970 Days
• Field of Search: 128/660.03, 128/662.06, 604/96-103
• US Class Current: 600/468
• CPC Class Codes: A61B 17/320758 with a rotating cutting instrument, e.g. motor driven A61B17/320725, A61B17/32075 and A61B17/320783 take precedence; for removing intra-ocular material A61F9/00763; endoscopic rotatable cutting instruments A61B17/32002
• CPC Class Codes: A61B 2017/00243 cardiac
• CPC Class Codes: A61B 2090/378 using ultrasound
• CPC Class Codes: A61B 2090/3784 both receiver and transmitter being in the instrument or receiver being also transmitter
• CPC Class Codes: A61B 8/06 Measuring blood flow measuring volume flow in general G01F, e.g. G01F1/66, G01F1/72; measuring speed of fluids in general G01P5/00
• CPC Class Codes: A61B 8/12 in body cavities or body tracts, e.g. by using catheters catheters per se A61M25/00
• CPC Class Codes: A61B 8/445 Details of catheter construction
• CPC Class Codes: A61B 8/4488 the transducer being a phased array

Abstract

A catheter having a catheter body with a proximal and distal end. The catheter including an ultrasonic transducer proximate its distal end. An access port being provided in the catheter for delivery of a therapeutic device or the like to proximate the distal end of the catheter body. A guide wire port being further provided for insertion therethrough of a guide wire.

Claims

1. A catheter apparatus, comprising:

an elongated flexible body having proximal and distal ends;

an ultrasonic transducer mounted proximate the distal end of the catheter body to transmit ultrasound and receive resultant echoes so as to provide a field of view within which flow rates can be measured and features imaged, an electrical conductor disposed in the catheter body for electrically connecting the transducer to control circuitry external of the catheter;

port means disposed in the catheter body and extending from proximate the proximal end of the catheter body to proximate the distal end of the catheter body for receiving a therapeutic device whereby the therapeutic device can be delivered to proximate the distal end of the catheter for operation within the ultrasonic transducer field of view, an operational end of the therapeutic device projecting from proximate the distal end of the catheter body into the ultrasonic transducer field of view so as to allow visualization of the therapeutic device during its operation; and

guide wire port means disposed in the catheter body and extending from proximate the proximal end of the catheter body to proximate the distal end of the catheter body for receiving a guide wire.

2. An apparatus in accordance with claim 1, wherein the ultrasonic transducer has a frequency of 5 to 20 mHz.

3. An apparatus in accordance with claim 1, wherein the ultrasonic transducer has a frequency of 7 to 10 mHz.

4. An apparatus in accordance with claim 1 wherein the catheter body has a diameter of 4 to 24 French.

5. An apparatus in accordance with claim 1 wherein the catheter body has a diameter of 6 to 12 French.

6. An apparatus in accordance with claim 1 wherein the port means has a diameter of 7 to 8 French.

7. A medical system, comprising:

a catheter, comprising an elongated flexible body having proximal and distal ends;

an ultrasonic transducer mounted proximate the distal end of the catheter body to transmit ultrasound and receive resultant echoes so as to provide a field of view within which flow rates can be measured and features imaged, an electrical conductor disposed in the catheter body for electrically connecting the transducer to control circuitry external of the catheter;

port means disposed in the catheter body and extending from proximate the proximal end of the catheter body to proximate the distal end of the catheter body for receiving a therapeutic device whereby the therapeutic device can be delivered to proximate the distal end of the catheter for operation within the ultrasonic transducer field of view, an operational end of the therapeutic device projecting from proximate the distal end of the catheter body into the ultrasonic transducer field of view so as to allow visualization of the therapeutic device during its operation;

guide wire port means disposed in the catheter body and extending from proximate the proximal end of the catheter body to proximate the distal end of the catheter body for receiving a guide wire;

control circuitry means for controlling operation of the ultrasonic transducer; and

display means for displaying the flow rates and the features imaged by the ultrasonic transducer.

8. An apparatus in accordance with claim 7, wherein the ultrasonic transducer has a frequency of 5 to 20 mHz.

9. An apparatus in accordance with claim 7, wherein the ultrasonic transducer has a frequency of 7 to 10 mHz.

10. An apparatus in accordance with claim 7, wherein the catheter body has a diameter of 4 to 24 French.

11. An apparatus in accordance with claim 7 wherein the catheter body has a diameter of 6 to 12 French.

12. An apparatus in accordance with claim 7 wherein the port means has a diameter of 7 to 8 French.

13. A method of therapeutic intervention in a living body;

comprising;

inserting a catheter into the body, the catheter having a body with a proximal and distal end;

inserting a surgical device into the body through a port disposed in the catheter body and extending from proximate the proximal end to the distal end of the catheter body;

projecting the surgical device out of the catheter body from proximate the distal end of the catheter body;

pulsing an ultrasonic transducer, disposed proximate the proximal end of the catheter body, to transmit ultrasound and receive resultant echoes;

operating the surgical device within a field of view provided by the ultrasonic transducer, an operational end of the surgical device projecting from proximate the distal end of the catheter into the ultrasonic transducer field of view so as to allow visualization of the therapeutic device during its operation; and

processing the resultant echoes to image the operation of the surgical device.

14. A method in accordance with claim 13, comprising the further step of analyzing the resultant echoes with doppler circuitry to provide hemodynamic information.