The frequency characteristics and outcomes among cancer patients with delirium admitted to an acute palliative care unit (APCU).

Abstract

158 Background: Delirium is a common neuropsychiatric condition seen in patients (pts) with severe illness such as advanced cancer. Few studies on delirium frequency and course had been undertaken in pts with advanced cancer. We aimed to determine the frequency, characteristics and outcomes of pts with advanced cancer admitted to an APCU. Methods: Medical records of 609 consecutive pts admitted to the acute palliative care unit from January 2011-December 2011 were retrospectively reviewed. Demographics, Memorial Delirium Assessment Scale (MDAS), Palliative Medicine specialist (PMS) diagnosis of delirium, delirium etiology, subtype, reversibility, late development of delirium, and discharge outcome were collected. Delirium was diagnosed with MDAS score > 7 or by a PMS using DSM-IV TR Criteria. All pts admitted to the APCU had standardized assessments and management of delirium per best practice guidelines in delirium management. Descriptive statistics were used. Results: 317/609 (52%) APCU pts had a diagnosis of delirium; 214/317 (67%) on admission and 103/317 (33%) developed delirium after admission to the APCU. Hyperactive delirium was the most frequent type of delirium 117/317 (37%) followed by hypoactive 101/317 (32%) and mixed type 91/317 (29%). Haloperidol was the most commonly used medication to treat symptoms of delirium 210/317 (66%) followed by chlorpromazine 61/317 (19%). The use of olanzapine, lorazepam and other antipsychotics were minimal. Other interventions included opioid rotation 55/119 (46%), hydration 10/119 (8%), antibiotics 2/119 (2%) and combination treatment of opioid rotation, hydration, correction of electrolytes and antibiotics 52/119 (44%). Counseling of the caregivers and patient when indicated was performed in all cases. Delirium reversed in 98/317 (31%) of episodes. The majority of pts with delirium were discharged to hospice 130/317 (41%). Conclusions: About half of the pts admitted to the APCU had delirium. The predominant type was hyperactive delirium. Reversibility occurred in only a third of cases. Haloperidol was the main pharmacological agent. Pts with delirium were more frequently discharged to hospice.