Failure-cost mathematical model for medical equipment maintenance

Abstract

This paper proposes a mathematical maintenance model that analyses the effect of maintenance on the survival probability of medical equipment based on maintenance history and age of the equipment. The proposed model is simulated in Scilab using real data extracted from maintenance history of Anaesthesia Machine from Draeger. The analysis using survival approach reveals that conducting preventive maintenance (PM) on the selected medical equipment had a positive impact on survival of equipment. The model is then used to analyse the cost of maintenance scenarios and an appropriate scenario is proposed for Anaesthesia machine. A new failure-cost model is developed by authors which may be used to calculate the number of failures of equipment and the annual maintenance cost. The proposed models may be used as a planning tool for selecting maintenance strategies for various medical equipment.