Local emergency medical communication centres - staffing and populations.

Background: There are several examples of inadequate staffing at local emergency medical communication centres (LEMCs) resulting in limited availability and long waits on the telephone. There are no guidelines for population size or the staffing of a LEMC. In the following, we present models of catchment areas and staffing.
Material and Method: Traffic intensity on Saturdays and Sundays was based on data on figures for patient contacts at seven LEMCs in 2014 and 2015. We defined the minimum optimal population base as at least 50 % probability of ≥ 10 contacts in the course of a night duty. The Erlang-C formula was used to estimate service level and hence staffing requirements on the basis of population and response-time requirements. We have surveyed the combined staffing requirements of all the LEMCs in Norway.
Result: The minimum optimal population base was 29 134. In 2016, 48 of 103 LEMCs were smaller than this. In order to be able to satisfy the response-time requirements in the Norwegian Emergency Medicine Regulations, 112 LEMC night operators and 158 day operators would be necessary for the whole of Norway. A reduction of the response-time requirement from 120 to ten seconds would require 9.8 % more operators at night and 17 % more operators during the day.
Interpretation: The models we have presented provide a basis for planning the population base and staffing of LEMCs. Significantly stricter response-time requirements will result in limited need for more personnel.