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US 11,690,576 B2Granted
Apparatus and methods for detecting cardiac arrest
AssigneeHealth Alert, LLC
InventorsWalter L. Seale, Alois A. Langer, Nicholas J. Pauly, Mark Francis Anderson
Life of this patent
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Abstract
Apparatus and methods for detecting onset of cardiac arrest utilizing a perfusion monitor. Detecting cardiac arrest comprises transmitting a signal toward a user to interact with the skin of the user, receiving a reflection of the signal, generating a photoplethysmogram, and processing the photoplethysmogram to detect whether the user is experiencing cardiac arrest.
Claims20
An apparatus for detecting cardiac arrest, comprising:
- a photoplethysmographic measuring device including:
- a transmitter to provide a transmission of a signal to interact with tissue of a user, and
- a receiver module to:
- receive the transmission of the signal;
- and
- generate a photoplethysmogram;
- and
- a signal processor to process the photoplethysmogram to detect perfusion in the tissue of the user to determine whether the user is experiencing cardiac arrest, wherein the signal processor detects perfusion in the user by calculating an excursion value based on a maximum value and a minimum value of the photoplethysmogram during a time period.
5 more elements
A perfusion detector for detecting cardiac arrest, comprising:
- a photoplethysmographic measuring device including:
- a transmitter module to transmit a signal toward tissue of a user, and
- a receiver module to receive a transmission of the signal;
- a signal processor to:
- process a photoplethysmogram obtained by the photoplethysmographic measuring device to detect whether perfusion is present in the user, wherein the photoplethysmogram is generated from the transmission of the signal;
- and
- determine whether the user is experiencing cardiac arrest based on whether perfusion is present in the user,
- wherein the signal processor detects perfusion in the user by calculating an excursion value based on a maximum value and a minimum value of the photoplethysmogram during a time period;
- and
- an alarm mechanism to alert that the user is experiencing cardiac arrest based on a determination that the user is experiencing cardiac arrest.
7 more elements
Dependencies are inferred from the claim text.