Objective To study the value of P 300 in judging the true and false coma in patients with closed craniocerebral trauma. Methods The latency and amplitude of abnormal P 300 evoked by visual (image) stimulation were compared and analyzed between 237 cases with closed craniocerebral trauma.which were divided into coma,non coma,false coma and noclear group.Results There was very remarkable diffe rence in the latency and amplitude of P 300 between coma group and non coma group ( P 0 05). There was remarkable difference between the cases whose coma histories were unclear and non coma ( P

Objective To study the change of P 300 in patients with acute puffer poisoning.Methods With medicid-03E brain evoked potential instrument of Neuronic Company. the latency and the amplitude of P 300 evoked by visual (image) and audio stimulation were measured in 21 patients with acute puffer poisoning, these patients were compared with 30 normal subjects and compared with the P 300 during different condition of poisoning.Results The latency of P 300 evoked by visual (image) and audio stimulation in patient group was significantly prolonged as compared with the control group (P

Objective HGF and its receptor ( c-met) are principal mediators of mesenchymal-epithelial interac-tion in several different systems.Moreover, hair follicle is a model of mesenchymal-epithelial interaction.The aim of this study was to explore whether HGF/c-met signal plays a role in the control of hair follicle growth cycle.Methods To ex-amine the localization of HGF/c-met in anagen, catagen and telogen in the hair follicle of ICR mice.Results HGF was mainly located in the dermal papilla and sebaceous gland, and c-Met in the hair matrix, root sheath and epidermis.Both HGF and c-met expressions peaked during anagen, not found in catagen, and increased during telogen-anagen phase.Con-clusions Our results demonstrate a regulatory role of HGF and c-met in the control of hair follicle growth in ICR mice.

Objective To explore the relationship between the levels of serum dopamine,5-hydroxytryptamine,homovanillic acid and cognitive dysfunction in patients with Parkinson's disease.Methods A total of 118 Parkinson's disease patients admitted to Bazhong Central Hospital from February 2020 to February 2022 were selected as the disease group,and 106 healthy patients who underwent physical examination in the hospital during the same period were selected as the control group.The levels of serum do-pamine,5-hydroxytryptamine and homovanillic acid were measured in all subjects,and the cognitive function was evaluated with Montreal Cognitive Assessment Scale(MoCA).Parkinson's disease patients were divided into cognitive impairment group and non cognitive impairment group according to MoCA score.The serum do-pamine,5-hydroxytryptamine,homovanillic acid levels of the cognitive impairment group and the non cogni-tive impairment group were compared.Pearson correlation analysis was used to analyze the correlation be-tween serum dopamine,5-hydroxytryptamine and homovanillic acid levels and cognitive function of Parkinson's disease patients,and the receiver operating characteristic curve was drawn to analyze the evaluation value of serum dopamine,5-hydroxytryptamine and homovanillic acid levels on cognitive dysfunction of Parkinson's disease patients.Results The levels of serum dopamine,5-hydroxytryptamine,homovanillic acid and MoCA score in the disease group were lower than those in the control group,with statistical significance(P＜0.05).The levels of serum dopamine,5-hydroxytryptamine,homovanillic acid and MoCA score in advanced patients were lower than those in early patients,and the difference was statistically significant(P＜0.05).The levels of serum dopamine,serotonin and homovanillic acid in the cognitive dysfunction group were lower than those in the non-cognitive dysfunction group,and the difference was statistically significant(P＜0.05).The results of Pearson analysis showed that the levels of serum dopamine,5-hydroxytryptamine and homovanillic acid in Parkinson's disease patients were positively correlated with MoCA score(P＜0.05).The sensitivity of the combined assessment of serum dopamine,serotonin and homovanillic acid in Parkinson's disease patients was higher than that in Parkinson's disease patients alone(x2=7.413,P=0.006;x2=9.714,P=0.002;x2=8.541,P=0.003),the area under the curve(AUC)was higher than the AUC for assessing cognitive impair-ment in Parkinson's disease alone(Z=2.479,P=0.013;Z=2.271,P=0.023;Z=2.451,P=0.014).Conclusion There are differences in serum levels of dopamine,5-hydroxytryptamine,homovanillic acid and cognitive function among different stages of Parkinson's disease patients.Serum levels of dopamine,5-hydroxytryptamine,and homovanillic acid are closely related to cognitive function in Parkinson's disease pa-tients,all of which have evaluation value for the occurrence of cognitive dysfunction in Parkinson's disease pa-tients.However,the combination of the three serum indicators is more helpful for clinical evaluation and diag-nosis.

During coronavirus disease 2019 epidemic, the treatment of severe trauma has been impacted. The Consensus on emergency surgery and infection prevention and control for severe trauma patients with 2019 novel corona virus pneumonia was published online on February 12, 2020, providing a strong guidance for the emergency treatment of severe trauma and the self-protection of medical staffs in the early stage of the epidemic. With the Joint Prevention and Control Mechanism of the State Council renaming "novel coronavirus pneumonia" to "novel coronavirus infection" and the infection being managed with measures against class B infectious diseases since January 8, 2023, the consensus published in 2020 is no longer applicable to the emergency treatment of severe trauma in the new stage of epidemic prevention and control. In this context, led by the Chinese Traumatology Association, Chinese Trauma Surgeon Association, Trauma Medicine Branch of Chinese International Exchange and Promotive Association for Medical and Health Care, and Editorial Board of Chinese Journal of Traumatology, the Chinese expert consensus on emergency surgery for severe trauma and infection prevention during coronavirus disease 2019 epidemic ( version 2023) is formulated to ensure the effectiveness and safety in the treatment of severe trauma in the new stage. Based on the policy of the Joint Prevention and Control Mechanism of the State Council and by using evidence-based medical evidence as well as Delphi expert consultation and voting, 16 recommendations are put forward from the four aspects of the related definitions, infection prevention, preoperative assessment and preparation, emergency operation and postoperative management, hoping to provide a reference for severe trauma care in the new stage of the epidemic prevention and control.