Emergence delirium isn't testimony
A thread on emergence delirium and disinhibition warns that patient statements during recovery—especially after ketamine—are often delirious and not reliable as factual reports reported. That matters for PACU clinicians because interpreting or documenting those utterances as accurate can mislead teams and families during postoperative handoffs.
Emergence-delirium rates reported in adults range from about 4% to 31% and can reach 50–80% in pediatric populations, according to a clinical overview of perioperative emergence delirium. (emedicine.medscape.com) Randomized trials and systematic reviews disagree on ketamine’s effect: a large randomized trial reported no clear prevention benefit for postoperative delirium. (thelancet.com) Later pooled analyses and a 2026 review reported up to an approximately 50% reduction in odds of postoperative delirium with perioperative ketamine/esketamine in some cohorts. (sagepub.com) Ketamine’s neurobiology is framed by the “disinhibition hypothesis,” which links NMDA-receptor blockade to cortical disinhibition and downstream psychotomimetic effects. (mdpi.com) Regulatory labeling for esketamine explicitly warns of dissociation and perceptual changes that require post‑administration monitoring. (accessdata.fda.gov) Failure to contextualize delirious utterances can propagate harm during handoffs: implementation of a standardized OR→PACU checklist (PATH) reduced hypoxaemic events in a multicenter study. (bjanaesthesia.org.uk) Independent event‑report analyses found that perioperative agitation/delirium events were associated with patient injury in roughly 40% of reports and required additional monitoring or interventions in over a third of cases. (patientsafetyj.com) Validated delirium screening is recommended in critical care settings—PADIS (2018) recommends routine CAM‑ICU or ICDSC monitoring for adults—while institutional protocols emphasize pairing CAM‑ICU assessments with RASS scoring (reporting “unable to assess” only when RASS ≤ −3). (icudelirium.org) Anesthesia and PACU documentation best practices endorsed in national standards call for objective handoff elements (physiologic data, medications and timing) rather than verbatim attribution of delusional statements, and case literature documents that delirium‑related persecutory memories can persist and require structured follow‑up and family education. (asahq.org)
