Automatic monitoring for and detection of tissue pop

• US 10,194,885 B2
• Filed: 10/02/2012
• Issued: 02/05/2019
• Est. Priority Date: 12/30/2011
• Status: Active Grant

• Current Assignee: St. Jude Medical, Atrial Fibrillation Division, Inc. (Abbott Laboratories)
• Original Assignee: St. Jude Medical, Atrial Fibrillation Division, Inc. (Abbott Laboratories)
• Inventors: Byrd, Israel A., Fish, Jeffrey M., Clark, Lynn E., Paul, Saurav
• Primary Examiner(s): Cerioni, Daniel L
• Assistant Examiner(s): Warsi, Yasmeen S
• Application Number:
  US14/369,069
• Publication Number:
  US 20140358038A1
• Time in Patent Office: 2,317 Days
• CPC Class Codes: A61B 18/1492 having a flexible, catheter-like structure, e.g. for heart ablation A61B18/1477 takes precedence
• CPC Class Codes: A61B 2018/00351 Heart
• CPC Class Codes: A61B 2018/00577 Ablation
• CPC Class Codes: A61B 2018/00642 with feedback, i.e. closed loop control
• CPC Class Codes: A61B 2018/0069 using fuzzy logic
• CPC Class Codes: A61B 2018/0088 Vibration
• CPC Class Codes: A61B 2018/00898 Alarms or notifications created in response to an abnormal condition
• CPC Class Codes: A61B 5/0036 including treatment, e.g., using an implantable medical device, ablating, ventilating
• CPC Class Codes: A61B 5/0538 invasively, e.g. using a catheter
• CPC Class Codes: A61B 5/4836 Diagnosis combined with treatment in closed-loop systems or methods A61B5/0036 takes precedence
• CPC Class Codes: A61B 5/4848 Monitoring or testing the effects of treatment, e.g. of medication
• CPC Class Codes: A61B 5/725 using specific filters therefor, e.g. Kalman or adaptive filters A61B5/316 take precedence
• CPC Class Codes: A61B 5/7405 using sound
• CPC Class Codes: A61B 5/742 using visual displays A61B5/339 takes precedence
• CPC Class Codes: A61B 7/00 Instruments for auscultation
• CPC Class Codes: A61B 7/04 Electric stethoscopes microphones, acoustic transducers therefor H04R
• CPC Class Codes: H04R 17/02 Microphones

Abstract

A system that automatically detects a myocardial barotrauma (i.e., tissue pop) event so that proper post-procedure care can be given includes an electronic control unit (ECU), a computer-readable memory coupled with the ECU, and detection logic stored in the memory configured to be executed by the ECU. The detection logic is configured to receive a signal generated by an electro-acoustic transducer related to acoustic activity within the patient, monitor the signal for a pre-determined indication of a barotrauma event, and output a notification when the pre-determined indication is detected. The transducer can be integrated with an extra-body patch that includes one or more electrodes for use with a medical device navigation system.

Claims

1. A system for detecting a myocardial barotrauma event in a tissue of a body during an ablation procedure, comprising:

an electronic control unit (ECU);

a computer-readable memory coupled with said ECU; and

detection logic stored in said memory configured to be executed by said ECU, said detection logic configured to;

receive an electrical signal indicative of acoustic activity that represents the myocardial barotrauma event within the body, wherein the electrical signal indicative of acoustic activity that represents the myocardial barotrauma event is received from one of a plurality of electro-acoustic transducers configured to be placed in communication with an external surface of the body, wherein the one of the plurality of electro-acoustic transducers is selected by the ECU as being most likely to register a tissue pop event based on a number of available electro-acoustic transducers, the location of the electro-acoustic transducers, and a position and orientation of an ablation catheter disposed in the body during the ablation procedure;

monitor said signal for a pre-determined indication of a myocardial barotrauma event; and

generate a notification output when said pre-determined indication is detected.

2. The system of claim 1, wherein said detection logic is further configured to apply an amplification algorithm to said signal, said amplification algorithm being configured to amplify an occurrence of said pre-determined indication.

3. The system of claim 1, further comprising storage memory coupled with said ECU, wherein said detection logic is further configured to store data in said storage memory related to a barotrauma event when said pre-determined indication is detected.

4. The system of claim 3, wherein said data comprises a portion of said signal beginning at a first time before said barotrauma event and ending at a second time after said barotrauma event.

5. The system of claim 1, wherein said pre-determined indication has a temporal duration of about three milliseconds or less.

6. The system of claim 1, wherein said notification output comprises a visual notification.

7. The system of claim 6, wherein said visual notification comprises a display of said signal.

8. The system of claim 1, wherein said notification output comprises an auditory notification.

9. The system of claim 1, further comprising ablation logic stored in said memory configured to be executed by said ECU, said ablation logic configured to disable an ablation generator when said pre-determined indication is detected.

10. The system of claim 1, wherein the electro-acoustic transducer is incorporated into an ablation dispersive patch configured to be coupled with the external surface of the body.

11. The system of claim 1, wherein the electro-acoustic transducer is incorporated into an electrode patch configured to be coupled with the external surface of the body and configured to be used with a medical device positioning and navigation system.

12. The system of claim 11, wherein the received electrical signal indicative of acoustic activity within the body is one of a plurality of electrical signals indicative of acoustic activity within the body that are received from a plurality of electro-acoustic transducers incorporated into a plurality of electrode patches configured to be coupled with the external surface of the body.

13. The system of claim 1, wherein:

the electro-acoustic transducer is incorporated into an ablation dispersive patch;

the ablation dispersive patch is configured to receive an ablation signal; and

the electro-acoustic transducer is configured to receive the electrical signal indicative of acoustic activity that represents the myocardial barotrauma event.

14. The system of claim 13, further comprising filter, wherein the low-pass filter filters the electrical signal indicative of acoustic activity that represents the myocardial barotrauma event to eliminate frequencies generated by the ablation dispersive patch.