A Multisite Retrospective Study Evaluating the Implementation of the Pasero Opioid-Induced Sedation Scale (POSS) and Its Effect on Patient Safety Outcomes

The Joint Commission recommended the Pasero Opioid-induced Sedation Scale (POSS) to minimize opioid-induced respiratory depression. However, there is a paucity of data describing its impact on patient safety. This study assessed the impact of POSS implementation or reeducation on naloxone use in patients receiving hydromorphone. This retrospective, Institutional Review Board-approved study performed with the Indianapolis Coalition for Patient Safety was conducted in two phases, 3 months before and after intervention. The intervention was POSS implementation or reeducation at six sites in a variety of practice settings. A total of 212 patients were evaluated. For the primary endpoint, naloxone use occurred in 1.9% of patients in each group and occurred in 3.1 versus 3.5 patients per 1,000 patient days pre- versus postintervention (p = .902). For secondary endpoints, POSS documentation increased post- versus preintervention, 78.1% versus 26.4% (p < .001). More patients experienced unintended sedation based on the Richmond Agitation and Sedation Scale or POSS post- versus preintervention, 12.2% versus 3.8% (p = .04). When the POSS was used, unintended sedation was likely detected before respiratory depression occurred and before naloxone was required. The lack of change in naloxone use and increased sedation postintervention may reflect that a POSS score 3 or 4 is a better marker of unintended sedation and should be considered as an endpoint instead of naloxone in future studies. The implementation or reeducation of the POSS at six area health-systems resulted in increased documentation of POSS and opioid-induced unintended sedation detection with no change in naloxone use.