ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,419,536, issued on Sept. 23.
"Method and apparatus for assessing respiratory distress" was invented by Stanley Chan Siu (Castro Valley, Calif.), Jusson Koo (Milpitas, Calif.) and Zachary Andrew Siu (Castro Valley, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method and apparatus are disclosed for assessing a respiratory function from plethysmography data obtainable, for example, from a pulse oximeter. A pulsatile waveform obtained from pleth data is processed to obtain a second waveform extending over multiple respiratory cycles and representing respiration-related variations in a pulse-beat area defined by the pulsatile waveform. The second...