# US 12,127,819 B2 · System and method for calibrating a remote blood pressure system

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- Number: US 12,127,819 B2
- Document ID: US12127819B2
- Status: Granted
- Kind: B2
- Application number: 17/824,502
- Filed: 2022-05-25
- Published: 2022-09-08
- Granted: 2024-10-29
- Earliest claimed: 2018-03-16
- Assignees: Etrog Systems Ltd.
- Applicants: Etrog Systems Ltd.
- Inventors: Eyal Dov Vardi
- Web page: https://patentgrep.com/patent/US12127819B2

## CPC

- A61B 5/02125: {of pulse wave propagation time}
- G16H 40/40: for the management of medical equipment or devices, e.g. scheduling maintenance or upgrades
- A61B 5/0022: {Monitoring a patient using a global network, e.g. telephone networks, internet}
- A61B 5/02141: {Details of apparatus construction, e.g. pump units or housings therefor, cuff pressurising systems, arrangements of fluid conduits or circuits (A61B5/02233, A61B5/0235 take precedence)}
- A61B 5/022: by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers
- A61B 5/02416: {using photoplethysmograph signals, e.g. generated by infrared radiation (A61B5/14552 takes precedence)}
- A61B 5/257: using adhesive means, e.g. adhesive pads or tapes
- A61B 5/28: for electrocardiography [ECG]
- A61B 5/746: {Alarms related to a physiological condition, e.g. details of setting alarm thresholds or avoiding false alarms}
- G16H 10/60: for patient-specific data, e.g. for electronic patient records
- G16H 40/67: for remote operation
- A61B 2560/0223: of calibration, e.g. protocols for calibrating sensors
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- G16H: HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA

## Abstract

A system and method for calibration a system of determining blood pressure based on pulse wave transit time.

## Claims

### Claim 1

A method of generating a complex wave signature associated with a position of a monitor device on a patient's body comprises:
receiving, at a gateway device in communication with a monitor device, patient information associated with the patient on which the monitor device is positioned;
receiving, at the gateway device, position information indicating a current position of the monitor device on the patient's body;
receiving, at the gateway device from the monitor device, ECG data associated with a heartbeat of the patient;
determining, by the gateway device, whether the ECG data meets at least one designated criteria;
generating, by the gateway device, the complex wave signature based on median values of the ECG data; and
storing, by the gateway device, the complex wave signature in at least one memory operably connected to the gateway device.

### Claim 2 (depends on 1)

The method of claim 1, wherein the patient information is provided via an input device of the gateway device.

### Claim 3 (depends on 1)

The method of claim 1, wherein the patient information is retrieved from the at least one memory.

### Claim 4 (depends on 1)

The method of claim 1, wherein the at least one designated criteria is a maximum heartrate.

### Claim 5 (depends on 1)

The method of claim 1, wherein the at least one designated criteria is confirmation that the ECG data indicates a normal sinus rhythm.

### Claim 6 (depends on 1)

The method of claim 1, wherein, the generating step includes calculating a median for the ECG data provided by the monitor device, wherein the ECG data includes data collected from multiple electrodes of the monitor device positioned at different respective points on the patient's body.

### Claim 7 (depends on 1)

The method of claim 1, wherein the storing step includes storing the complex wave signature with the patient information and the position information and associating the complex wave signature with the patient information and the position information.

### Claim 8

A method of automatically determining a position of a monitor device on a patient's body comprises:
receiving, by a gateway device in communication with the monitor device, a first complex wave signature associated with a first position and a second complex wave signature associated with a second position;
receiving, by the gateway device from the monitor device, ECG data associated with a heartbeat of the patient;
determining, by the gateway device, whether the ECG data meets at least one designated criteria;
generating, by the gateway device, a current complex wave signature based on median values of the ECG data;
comparing, by the gateway device, the current complex wave signature to the first complex wave signature and the second complex wave signature; and
selecting, by the gateway device, one of the first position and the second position based on a relationship of one of the first complex wave signature and the second complex wave signature to the current complex wave signature.