The Effectiveness and Relevance of the Canadian Triage System at Times of Overcrowding in the Emergency Department of a Private Tertiary Hospital: A United Arab Emirates (UAE) Study.

Objective: A systematic and straightforward triage system is crucial for the proper and timely care of patients within the emergency department (ED). This study unfolds a detailed understanding of the impact of the Canadian Triage and Acuity Scale (CTAS) on patient care and resource allocation in a private tertiary hospital. To the best of our knowledge, this is the only article studying the impact of the CTAS in one of the private hospitals in the United Arab Emirates (UAE) to achieve triage optimisation strategies. There is scope for further research in both public and private hospitals in the UAE. A triage system not only helps healthcare professionals prioritise cases conveniently but also guides patients to the most suitable area for a consultation. As a general rule, EDs follow an algorithm for the purpose of triage, and the aim of our study is to assess one such five-level triage system, CTAS, for its effectiveness and relevance during overcrowding in a UAE ED.

Method: Within a period of approximately three weeks, a total of 351 CTAS-triaged patients were included in a prospective observational study during peak hours (17:00-22:00) of an ED in the UAE. The CTAS app was used as the triage tool to assess relevance, in terms of patient waiting times, resource allocation, and urgency level distribution, to the Canadian scale. All patients presenting to the ED were included with no exclusion criteria. The relationship between urgency level, duration of visit, and resources used was assessed, and the department's triage results were compared with those of the CTAS app.

Results: Our sample showed a female (187; 53.3%) and adult preponderance (215; 61.3%) with most of the adult patients aged between 30 and 40 (96; 44.65%). 41.5% (145) of the triage was mismatched between the department and the CTAS app with 115 (79.3%) cases of under-triaging and 30 (20.7%) cases of over-triaging. There was a statistically significant difference (p=0.004) between average waiting times across triage categories 4 and 5 with the former category patients waiting for a longer period of time. Cohen's kappa showed moderate inter-relatability (k=0.42). The average utilisation costs per triage category showed a positive correlation with the urgency level for CTAS (Pearson's r=0.59); however, the costs declined as the urgency level rose for the department.

Conclusions: The high compliance rate demonstrates that the CTAS can be applicable to institutions outside of Canada. The categorisation of patients by the CTAS and their resource allocation were more accurate than the standard triage proving its effectiveness as a triage tool. Lack of synchronisation among the triage nurses and inadequate triage training are the most plausible reasons for this comparison. The recommended "time to be seen by a physician" was achievable in our ED, and that, along with the expected relationship between CTAS and resource utilisation, can be seen as valid indicators for a quality triage system for use in the UAE.