Research On Ambulance Optimal Scheduling Model Considering The Change In The Degree Of Injury

In recent years,with the rapid development of the global economy and the acceleration of urbanization,there have been frequent incidents around the world,causing huge casualties and property losses to the society.Historical data show that the number of serious casualties caused by sudden mass casualties is far more than the number of deaths.A large proportion of the wounded died or were permanently disabled due to lack of timely and effective treatment.The wounded's injury will deteriorate and even die as the waiting time for treatment continues.In particular,large-scale casualties,due to sudden,unpredictable and extremely destructive events,often result in large-scale wounded in a short period of time,and the wounded are complex and widely distributed.Scientific and effective treatment of the wounded is the primary task of post-disaster relief work,and its efficiency is related to the success or failure of post-disaster relief.In the face of the surge in demand for medical resources,in order to win valuable time for post-disaster relief and wounded rescue,finding a scientific and reasonable rescue plan in a short period of time has become the key to improving rescue efficiency and reducing casualties.How to combine the wounded medical staff to the hospital for treatment with existing medical resources is an urgent problem to be solved.The purpose of this paper is to integrate the existing resources,the degree of injury and ambulance dispatching,and establish an ambulance dispatching model that considers the changes in the degree of injury,providing a basis and support for decision makers to develop post-disaster relief plans.In the decision-making process of ambulance dispatching problems,first of all,the wounded are classified into four categories according to WHO classification,including mild wounded,moderate wounded,severely wounded and dead wounded.Secondly,taking into account the change in the degree of injury to the waiting time of the treatment,the probability matrix of the deterioration of the injury status of the wounded with the waiting time of the treatment is established.The seven time nodes in which the casualty injury may be transferred are discussed.The health status of the wounded at each time node is delayed and the waiting time is delayed.Third,considering the urgency of the rescue of the injured after the disaster,the different needs of different types of wounded for the ambulance,the degree of injury of the wounded with the delay of the rescue time,the uncertainty of the time from the various rescue centers to the disaster site,etc.,this article discusses how to make full use of existing medical resources,rationally dispatch ambulances to quickly and effectively transport the wounded to hospitals with therapeutic capabilities,complete the treatment of the wounded within a valid time,and set up adequate hospital resources and sufficient ambulance resources.There are sufficient resources,shortage of ambulance resources,shortage of hospital resources,sufficient ambulance resources,shortage of hospital resources,and shortage of ambulance resources.Finally,the simulation of the 8·12 Tianjin explosion is carried out,and an ambulance dispatching scheme is provided for each scenario,which verifies the validity and feasibility of the model and algorithm.Studies have shown that in the case of ambulance dispatching,considering the deterioration of the health status of the wounded over time,it is more in line with the actual disaster situation,and can more rationally and fully utilize the hospital resources and ambulance resources to maximize the value of resources.