US 12,447,296 B1
Systems and methods of determining therapeutic expiratory pressure automatically
William A. Truschel, Oakmont, PA (US)
Assigned to BREAS MEDICAL AB, Molnlycke (SE)
Filed by BREAS MEDICAL AB, MOLNLYCKE (SE)
Filed on Feb. 28, 2022, as Appl. No. 17/682,068.
Int. Cl. A61M 16/00 (2006.01)
CPC A61M 16/024 (2017.08) [A61M 16/0003 (2014.02); A61M 2016/0027 (2013.01); A61M 2016/0042 (2013.01); A61M 16/026 (2017.08); A61M 2230/42 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method of determining a therapeutic dosage of expiratory positive airway pressure (EPAP) comprising the steps of:
automatically cataloging measurements of expiratory time constants and corresponding expiratory flow patterns, wherein each expiratory time constant is determined in part by its corresponding expiratory flow pattern, wherein each expiratory flow pattern is determined by analyzed breath data of an associated user, and wherein at least one set of the analyzed breath data is acquired during a first dosage of EPAP and at least one set is acquired during a second dosage of EPAP that differs in pressure from the first dosage;
comparing at least one measured cataloged expiratory time constant with its corresponding expiratory flow pattern to another measured cataloged expiratory time constant with its corresponding expiratory flow pattern where each were acquired at different dosages of EPAP;
determining a baseline therapeutic dosage of EPAP which is the lowest dosage of EPAP such that increasing the baseline EPAP dosage does not significantly reduce the expiratory time constant or result in significantly low peak expiratory flow;
repeating the above steps with at least one increased or decreased dosage of EPAP to determine if the baseline therapeutic dosage of EPAP should be increased or decreased; and
updating the pressure of the baseline therapeutic dosage of EPAP to the increased or decreased dosage when an improvement of the expiratory time constant is determined.