Abstract: The aim of this research was to ascertain the opinions of ward nurses (registered and enrolled nurses) on a critical care outreach (CCO) service and the early warning score (EWS) tool and how CCO helps them care for ward patients whose condition is deteriorating. An 18-item Likert scale questionnaire was adapted to gain opinions on three aspects of the service: The usability of the EWS tool and the escalation protocol; the role and usefulness of the critical care outreach nurse (CCON); and education and sharing of critical care skills. The research was conducted in a 270-bed New Zealand hospital with a nurse-led outreach team. The survey was distributed to adult general wards. It found 45 percent of ward nurses found EWS useful in identifying patients whose condition was deteriorating, 58 percent found EWS easy to use and 82 percent found EWS helped them prioritise workloads. On the role and usefulness of the CCON, 41 percent of surveyed nurses found the post-ICU review helpful, 65 said CCONs were approachable, 71 percent found the CCON shift time of 3pm-11pm was useful, 69 percent said the CCON demonstrated sound clinical knowledge, and 54 percent rated CCONs teaching as sufficient for their needs. When CCO was present, nurses were able to formulate an effective management plan for potentially deteriorating patients and acquired critical care skills needed to manage such patients. The results are comparable with other research which sought nurse opinion of CCO. It indicates nurses believe CCO to be instrumental in increasing critical care skills to prevent deterioration in the clinical area.