Objective To investigate the current status of military training injuries among aviation cadets in a university,analyze the influencing factors and propose prevention and control measures.Methods Enrolled in the study in December 2021 were 605 male aviation cadets,of whom 192 were freshmen,202 were sophomores and 211 were juniors.A self-made questionnaire form was developed and used to investigate and analyze the occurrence of training injuries among aviation cadets.Results The rate of training injuries among the aviation cadets was 57.19%,of whom 43.75%were freshmen,60.40%were sophomores,and 66.35%were juniors.Injuries sites were mainly in the lower extremities,with freshmen,sophomores and juniors ranking the first,but with a decreasing trend.In injury-causing subjects,3 000 m race ranked the first in the freshmen,single parallel bars ranked the first in the sophomores,other factors ranked the first in the juniors.In terms of medical care,self-diagnosis and care accounted for 34.97%and outpatient medical care accounted for 46.82%,with the sum of them accounting for 81.79%.Conclusion There is a relatively high rate of training injuries among aviation cadets.The number of training injuries,affected injury sites,injury-causing subjects,onset of seasons and adverse factors vary with the advance of grades and display various features.Further emphasis on health education among aviation cadets and the improvement of outpatient medical service are of great importance to the prevention and treatment of training injuries among aviation cadets.

Objective:To do research on prediction method of medical equipment sudden fault for the requirement of medical security at sea which is away from base.Methods: Sudden fault data of the medical equipment is a random variable which often manifest as the time of sudden fault happening. The possible distribution type of fault data is hypothesized according to the engineering experience. In order to ensure the sudden fault density function of medical equipment, parameter estimation and distribution fit test are carried out for the fault data.Results: The sudden fault prediction model of medical equipment is established to get the future sudden fault probability of medical equipment based on the distribution function of fault data.Conclusion: The results of case analysis validate the rationality of sudden fault prediction model.

Objective To observe the protective effect of pretreatment with wortmannin against pancreas and liver injuries indued by severe acute pancreatitis(SAP) in rats and investigate its mechanism.Methods Fifty-four SD rats were randomly divided into 3 groups: control group(C group),SAP group(P group) and SAP+wortmannin group(PW group)(n=18 per group). SAP model was induced by retrograde infusion of 50g/L sodium taurocholate into the biliopancreatic duct of rats,except C group in which sodium taurocholate was replaced by normal saline. Serum level of tumor necrosis factor-alpha(TNF-?)、 alanine aminotransferase(ALT)、aspartate aminotransferase(AST)、and nuclear factor-kappa B(NF-?B)in liver were detected. Histopathology of liver and pancreas was studied.Results In P group, serum levels of TNF-?、ALT、AST and NF-?B in liver were significantly elevated(P