Irvine-based Masimo, a developer of medical pulse oximetry systems, reported today that it has settled a lawsuit with Hygia Health Services, which reprocesses used medical equipment. Terms of the settlement were confidential. Masimo had sued Hygia in April of 2009 over Hygia's reprocessing of its sensors, and also had later claimed patent and trademark infringement, unfair competition, false designation of origin, and injury to business reputation in its suit. Masimo said the settlement was made on "mutually agreeable terms". Masimo is a maker of pulse oximetry devices, which are used to measure blood oxygen and other patient health signs.