Objective To investigate the effects of low-dose nuclear radiation exposure on the body by analyzing the antioxidant indices, immune indices, lymphocyte proliferation activity, and blood biochemical indices of persons exposed to long-term low-dose nuclear radiation, and to provide a basis for radiation protection and occupational health monitoring. Methods Eighty nuclear radiation workers were selected as the exposure group, and another 30 non-exposure personnel were selected as the control group. In both groups, blood biochemistry, serum total antioxidant capacity (T-AOC), malondialdehyde (MDA), glutathione peroxidase (GSH-Px), superoxide dismutase (SOD), lymphocyte proliferation activity, proliferating cell nuclear antigen (PCNA), apoptosis factors Bcl-2 and Bax, lymphocyte transformation rate, and lymphocyte micronucleus rate were measured. Results Compared with the control group, T-AOC, GSH-Px, SOD, cell proliferation activity, PCNA, Bcl-2, lymphocyte transformation rate, white blood cell count, and platelet count in the exposure group were significantly decreased, while MDA and Bax were significantly increased (P < 0.05). The lymphocyte micronucleus rate showed no significant difference between the two groups (P > 0.05). Conclusion Long-term low-dose exposure to nuclear radiation has certain effects on related indices of workers, but does not cause significant damage. The personnel exposed to nuclear radiation should enhance the awareness of protection and strengthen scientific protection to reduce radiation damage.

Objective To explore routes for the optimization of casualty triage flow in urgent medical support of nuclear acci -dents.Methods The present working procedures were reorganized and redesigned in accordance with the feature and pattern of the medi -cal mission , as well as the practical organization of medical support teams in case of nuclear accidents .Results Through optimized proce-dures, the casualties were integrated from multiple types to simpler types:i.e.the A1 casualty type that would go through 3 steps and A2 would go through 4 steps;B1 casualty type would go through 3 steps and B2 casualty type would go through only 2 steps.The triage work flow was optimized to 2 steps, and treatment work flow was also optimized and clarified .Conclusion Casualty triage was permeated in the whole process of medical rescue mission , for this reason, the responsibilities and divisions of work for various teams should be elaborated and clarified on the basis of optimized work procedures , and they should be demonstrated and further rectified in practical work .