# US 2025/0082402 A1 · Multi-sensor patch and signal analyzer that enable safe cardiac ablation

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- Number: US 2025/0082402 A1
- Document ID: US20250082402A1
- Status: Published application
- Kind: A1
- Application number: 18/882,606
- Filed: 2024-09-11
- Published: 2025-03-13
- Earliest claimed: 2023-09-11
- Assignees: Field Medical, Inc.
- Applicants: Field Medical, Inc.
- Inventors: Steven MICKELSEN; The Quyen NGUYEN; Eduardo JIMENEZ
- Web page: https://patentgrep.com/patent/US20250082402A1

## CPC

- A61B 18/16: Indifferent or passive electrodes for grounding
- A61B 18/1233: {with circuits for assuring patient safety}
- A61B 18/1492: {having a flexible, catheter-like structure, e.g. for heart ablation (A61B18/1477 takes precedence)}
- A61B 2018/00351: {Heart}
- A61B 2018/00577: {Ablation}
- A61B 2018/00613: {Irreversible electroporation}
- A61B 2018/00642: {with feedback, i.e. closed loop control}
- A61B 2018/00708: {switching the power on or off}
- A61B 2018/00839: {Bioelectrical parameters, e.g. ECG, EEG}
- A61B 2018/165: {Multiple indifferent electrodes}
- A61B 2018/167: {Passive electrodes capacitively coupled to the skin}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

A system that enables safe cardiac pulsed field ablation by using multiple types of sensors on a patch to detect and cross-check that the heartbeat is in a safe phase to receive an ablation pulse. The patch may contain for example any or all of ECG electrodes, PPG sensors, accelerometers, and microphones. The patch may also contain one or more pulse return electrodes for unipolar ablation. A signal analyzer coupled to a pulse generator may receive sensor data from the patch and may analyze this data to determine the heartbeat phase. If data from different sensors are inconsistent, then pulse generation may be disabled as a safety feature. Otherwise, pulses may be enabled when the heartbeat is in a safe phase; for example, pulses may be excluded during the T wave.

## Claims

### Claim 1

A multi-sensor patch and signal analyzer that enable safe cardiac ablation, comprising:
a patch configured to be placed on a patient's body, wherein said patch comprises sensors that comprise
one or more electrocardiogram electrodes;
one or more photoplethysmogram sensors; and
one or more accelerometers; and
one or more pulsed field ablation return electrodes coupled electrically to a pulse generator that creates electrical pulses to induce cardiac ablation within the patient's body; and
a signal analyzer coupled to said sensors and to said pulse generator, wherein said signal analyzer is configured to repeatedly
obtain data from said sensors;
analyze said data to identify a heartbeat and a phase of a heartbeat cycle;
confirm that data from each sensor of said sensors is consistent with said heartbeat and said phase of said heartbeat cycle; and,
when said data from each of said sensors is consistent, and said phase of said heartbeat cycle is a safe time period for cardiac ablation, enable said pulse generator to generate said electrical pulses.

### Claim 2 (depends on 1)

The multi-sensor patch and signal analyzer that enable safe cardiac ablation of claim 1, wherein said sensors further comprise one or more microphones.

### Claim 3 (depends on 1)

The multi-sensor patch and signal analyzer that enable safe cardiac ablation of claim 1, wherein said one or more electrocardiogram electrodes comprise three or more electrocardiogram electrodes.

### Claim 4 (depends on 1)

The multi-sensor patch and signal analyzer that enable safe cardiac ablation of claim 1, wherein said one or more photoplethysmogram sensors comprise three or more photoplethysmogram sensors.

### Claim 5 (depends on 1)

The multi-sensor patch and signal analyzer that enable safe cardiac ablation of claim 1, wherein said one or more pulsed field ablation return electrodes comprise two or more pulsed field ablation return electrodes.

### Claim 6 (depends on 1)

The multi-sensor patch and signal analyzer that enable safe cardiac ablation of claim 1, wherein said one or more pulsed field ablation return electrodes are configured to return pulses of at least 15000 volts.

### Claim 7 (depends on 1)

The multi-sensor patch and signal analyzer that enable safe cardiac ablation of claim 1, wherein said signal analyzer is further configured to, when said phase of said heartbeat cycle is within a T wave, disable said pulse generator from generating said electrical pulses.