The Use of Pattern Recognition to Augment Traditional Monitoring in the Prevention of Opioid Overdose Harm.

Objectives: The aim of the study was to investigate the correlation of a pattern recognition algorithm to the opioid overdose intervention activities of trained medical staff at a safe consumption site (SCS).

Methods: Continuous physiological data were collected using the Masimo Radius PPG pulse oximeter from volunteer users of nonprescribed, unregulated opioids at a SCS. The algorithm retrospectively calculated opioid-induced respiratory depression (OIRD) severity scores (Opioid Halo scores) were compared to interventions recorded by SCS staff.