US 12,471,792 B2
Tapped light in a laser-based photoplethysmographic device
Jonas Alexander Pologe, Boulder, CO (US); and Theodore Philip Delianides, Boulder, CO (US)
Assigned to Zynex Monitoring Solutions, Inc., Englewood, CO (US)
Filed by Zynex Monitoring Solutions, Inc., Englewood, CO (US)
Filed on Mar. 18, 2024, as Appl. No. 18/607,796.
Prior Publication US 2025/0288215 A1, Sep. 18, 2025
Int. Cl. A61B 5/024 (2006.01)
CPC A61B 5/02427 (2013.01) 17 Claims
OG exemplary drawing
 
1. A photoplethysmographic device comprising:
a photoplethysmographic (PPG) monitor;
two or more emitters coupled to and controlled by the PPG monitor;
the two or more emitters including at least one laser and at least one of the at least one lasers is a tapped laser configured to emit a primary light through a primary optical path from the tapped laser to a sensor, the tapped laser further configured to emit a tapped light; and
a photodetector coupled to the PPG monitor and positioned to receive the tapped light from the tapped laser;
the photodetector adapted to generate an electrical signal indicative of intensity of amplitude of the tapped light from the tapped laser;
the PPG monitor adapted to process the electrical signal to determine a condition of the tapped laser;
whereby the PPG monitor determines if the tapped laser is damaged and/or if one or more operating conditions of the tapped laser needs to be altered.