The role of a critical care outreach service in the management of patients with haematological malignancy.

INTRODUCTION: Although improvement in survival from haematological malignancies has been reported, a substantial number of these patients develop life threatening complications. Critical care outreach services (CCOS) aim to avert inappropriate ICU admissions, while ensuring timely patient review.
METHODS: We retrospectively analysed patients with haematological malignancy reviewed by an outreach service between January 2014 and December 2015 at a single institution. The aim of our study was to describe the patient population assessed by a well-established outreach team, identify predictors of ICU admission, as well as ICU and hospital mortality.
RESULTS: Sixty of 126 patients reviewed (47.6%) were admitted to ICU. ICU and hospital mortality were 25.3% and 45.2%, respectively. The odds of being admitted to ICU was 13 times higher (p = 0.013) if the patient was referred for hypoxia, 20 times higher (p = 0.006) if they were referred for sepsis or 14 times higher (p = 0.027) if they were referred to CCOS for hypotension, compared to when the team was automatically alerted. The odds of not surviving hospital admission increased 1.27 times for every extra day of CCOS review (p = 0.02). When a patient was referred having a refractory or progressive haematological condition, the odds of not surviving to hospital discharge increased by four or 12 times, respectively, compared to when the referred patient was in remission. Receiving high flow nasal cannula oxygen (HFNCO) was associated with a reduction in ICU admission (p = 0.03), irrespective of the underlying diagnosis, performance status or location of delivery. The CCOS participated in end-of-life discussions in 29% patients.
CONCLUSIONS: ICU and hospital mortality of patients with haemato-oncological malignancy continue to improve. CCOS are heavily involved in the recognition and management of these patients, as well as in the facilitation of end-of-life discussions. Sepsis was associated with increased risk of ICU admission and mortality. Initiation of HFNCO outside ICU appears to be feasible and safe and was not associated with increasing risk in this single centre study. © The Intensive Care Society 2019.