ALEXANDRIA, Va., June 16 -- United States Patent no. 12,303,642, issued on May 20, was assigned to MAQUET CRITICAL CARE AB (Solna, Sweden).

"Non-invasive estimation of hemodynamic parameters during mechanical ventilation" was invented by Carl-Erik Troili (Danderyd, Sweden) and Tomas Westerlund (Sollentuna, Sweden).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for non-invasive determination of a hemodynamic parameter of a mechanically ventilated subject based on a point in time (thb) of a heartbeat of the subject and an arrival point in time (tarr_pulm) at which a blood pressure pulse caused by the heartbeat reaches the lungs of the subject. The method includes the steps of measuring a respiratory pr...