Objective To establishment a process of monitoring waste resin clearance in nuclear power plants, and to meet clearance requirements and simplify the monitoring work. Methods In accordance with the requirements specified in current laws, regulations, and standards in China, as well as the practice of slightly polluted waste resins generated during the operation of nuclear power plants, in-depth discussion was conducted on sampling methods, sample uniformity and representativeness tests, radiation monitoring contents and methods, and simplified monitoring processes, in order to accurately monitor the radionuclide activity of waste resins to be cleared. Results A process was established to monitor waste resin clearance in nuclear power plants. A total of 55 barrels of waste resins were cleared and the radiation levels met the requirements. Conclusion An effective clearance process can facilitate the sampling of representative resins, improve the accuracy of monitoring data, differentiate radioactive waste from cleared waste, and simplify the monitoring process. Our results provide a basis and reference for future waste resin clearance.

Objective:To explore the therapeutic outcome of consciousness disorders induced by different brain injury mechanisms.Methods:A total of 130 patients with impaired consciousness after brain injuries treated in Nanjing Zijin Hospital from January 2016 to May 2021 were taken as research subjects. According to the causes of injury，they were divided into cerebrovascular accident group（ n = 37），brain trauma group（ n=68），hypoxic-ischemic encephalopathy group（ n = 7），and cerebral aneurysm group（ n = 18）. The patients in the four groups were all given comprehensive treatment，including hyperbaric oxygen（HBO）therapy，electrical stimulation，acupuncture，passive training，and drug therapy. The Glasgow Coma Scale（GCS）scores and China Nanjing persistent vegetative state scale（CNPVSS）scores of the four groups before treatment and after three months of comprehensive treatment combined with HBO were compared，and the consciousness recovery rate and the overall curative effect of the four groups were also compared. Results:After three months of comprehensive treatment combined with HBO，the GCS scores and CNPVSS scores of the four groups were improved compared with those before treatment（all P < 0.05）；the most significant increase of GCS scores and CNPVSS scores was in the cerebral aneurysm group. The highest consciousness recovery rate was in the cerebrovascular accident group（64.86%，24/37），followed by cerebral aneurysm group（55.56%，10/18），and there were statistically significant differences in the consciousness recovery rate among the four groups（ P < 0.01）. The overall effective rate was in the descending order of cerebrovascular accident group［86.49%（32/37）］，cerebral aneurysm group［83.33%（15/18）］，brain trauma group［69.12%（47/68）］，and hypoxic-ischemic encephalopathy group［42.86%（3/7）］，with statistically significant differences（ P < 0.05）. The cerebrovascular accident group and the cerebral aneurysm group achieve higher consciousness recovery rates and greater improvement in consciousness disturbance compared with the other two groups after three months of comprehensive treatment combined with HBO. Conclusion:Different injury mechanisms affect the therapeutic outcomes of consciousness disorders induced by brain injuries.

Objective:To explore the therapeutic outcome of consciousness disorders induced by different brain injury mechanisms.Methods:A total of 130 patients with impaired consciousness after brain injuries treated in Nanjing Zijin Hospital from January 2016 to May 2021 were taken as research subjects. According to the causes of injury，they were divided into cerebrovascular accident group（ n = 37），brain trauma group（ n=68），hypoxic-ischemic encephalopathy group（ n = 7），and cerebral aneurysm group（ n = 18）. The patients in the four groups were all given comprehensive treatment，including hyperbaric oxygen（HBO）therapy，electrical stimulation，acupuncture，passive training，and drug therapy. The Glasgow Coma Scale（GCS）scores and China Nanjing persistent vegetative state scale（CNPVSS）scores of the four groups before treatment and after three months of comprehensive treatment combined with HBO were compared，and the consciousness recovery rate and the overall curative effect of the four groups were also compared. Results:After three months of comprehensive treatment combined with HBO，the GCS scores and CNPVSS scores of the four groups were improved compared with those before treatment（all P < 0.05）；the most significant increase of GCS scores and CNPVSS scores was in the cerebral aneurysm group. The highest consciousness recovery rate was in the cerebrovascular accident group（64.86%，24/37），followed by cerebral aneurysm group（55.56%，10/18），and there were statistically significant differences in the consciousness recovery rate among the four groups（ P < 0.01）. The overall effective rate was in the descending order of cerebrovascular accident group［86.49%（32/37）］，cerebral aneurysm group［83.33%（15/18）］，brain trauma group［69.12%（47/68）］，and hypoxic-ischemic encephalopathy group［42.86%（3/7）］，with statistically significant differences（ P < 0.05）. The cerebrovascular accident group and the cerebral aneurysm group achieve higher consciousness recovery rates and greater improvement in consciousness disturbance compared with the other two groups after three months of comprehensive treatment combined with HBO. Conclusion:Different injury mechanisms affect the therapeutic outcomes of consciousness disorders induced by brain injuries.

Objective:To investigate hospital acquired infection (HAI) in hospitalized patients who were mainly treated with hyperbaric oxygen (HBO) during the period when the whole society and the hospital were in level one public health emergency response to COVID-19.Methods:The HAI incidence and infectious pathogen test results of 138 patients (the observation group) who were given HBO therapy in Nanjing Zijin Hospital in February 2020, the period of level one public health emergency response to COVID-19, were collected, and they were analyzed in year-on-year comparison with the corresponding data of the 133 patients (the control group I) admitted to the hospital in February 2019, and in month-on-month comparison with the corresponding data of the 213 patients (the control group II) admitted to the hospital in December 2019.Results:The HAI incidence of the observation group (10.87%) was about 5% lower than that (15.04%) in the control group I and that (15.02%) in the control group II, but there was no statistical difference ( χ2=1.43, P=0.49). The pathogens detected in the observation group were pseudomonas aeruginosa, acinetobacter baumannii, and serratia marcescens, which were less than those detected in the control group II. Conclusion:Strict social isolation and ward infection control measures can effectively reduce HAI incidence in patients given HBO therapy, but the reliability of such measures needs further demonstration by multi-center and large-sample data.

Objective:To investigate hospital acquired infection (HAI) in hospitalized patients who were mainly treated with hyperbaric oxygen (HBO) during the period when the whole society and the hospital were in level one public health emergency response to COVID-19.Methods:The HAI incidence and infectious pathogen test results of 138 patients (the observation group) who were given HBO therapy in Nanjing Zijin Hospital in February 2020, the period of level one public health emergency response to COVID-19, were collected, and they were analyzed in year-on-year comparison with the corresponding data of the 133 patients (the control group I) admitted to the hospital in February 2019, and in month-on-month comparison with the corresponding data of the 213 patients (the control group II) admitted to the hospital in December 2019.Results:The HAI incidence of the observation group (10.87%) was about 5% lower than that (15.04%) in the control group I and that (15.02%) in the control group II, but there was no statistical difference ( χ2=1.43, P=0.49). The pathogens detected in the observation group were pseudomonas aeruginosa, acinetobacter baumannii, and serratia marcescens, which were less than those detected in the control group II. Conclusion:Strict social isolation and ward infection control measures can effectively reduce HAI incidence in patients given HBO therapy, but the reliability of such measures needs further demonstration by multi-center and large-sample data.

Objective:To explore the predictive value of China Nanjing persistent vegetative state scale (CNPVSS) on the curative effect of the patients with chronic disorder of consciousness, by analyzing the curative effect of the rehabilitation treatment combined with hyperbaric oxygen (HBO) for patients with chronic disorder of consciousness.Methods:A total of 48 patients with chronic disorder of consciousness admitted to Nanjing Zijin Hospital to receive rehabilitation treatment combined with HBO from the September of 2016 to the May of 2019 were selected according with the analytical criteria. Before the treatment, the patients were evaluated by CNPVSS and received electroencephalogram (EEG) and evoked potentials (EPs) examinations. The patients′ consciousness was evaluated again before discharge, the results of CNPVSS and electrophysiological examinations were recorded, and the correlation between the results and the changes of the consciousness was analyzed statistically.Results:The results of CNPVSS was positive correlated with near-term curative effect ( r=0.401, P=0.005); the rate of awakening after treatment was 46.2% among those who were scored as minimally conscious state (MCS) by CNPVSS; the rate of awakening after treatment was 17.1% among those who were at vegetative state (VS) or in a coma; the rate of awakening after treatment of the MCS patients was higher than those of the patients at VS or in a coma ( χ2=4.255, P=0.039). The recordings of right somatosensory evoked potentials (SSEPs) N20 was positive correlated with curative effect ( r=0.312, P=0.031); and the left visual evoked potentials (VEPs) V100 was positive correlated with curative effect ( r=0.285, P=0.049). There were no statistical significance found between other electrophysiological recordings with curative effect. Conclusion:CNPVSS can be an important tool to predict the outcome of the rehabilitation treatment combined with HBO for the patients with chronic disorder of consciousness, and the recordings of SSEPs and VEPs also are of a certain reference value in predicting the prognosis.

Objective:To explore the predictive value of China Nanjing persistent vegetative state scale (CNPVSS) on the curative effect of the patients with chronic disorder of consciousness, by analyzing the curative effect of the rehabilitation treatment combined with hyperbaric oxygen (HBO) for patients with chronic disorder of consciousness.Methods:A total of 48 patients with chronic disorder of consciousness admitted to Nanjing Zijin Hospital to receive rehabilitation treatment combined with HBO from the September of 2016 to the May of 2019 were selected according with the analytical criteria. Before the treatment, the patients were evaluated by CNPVSS and received electroencephalogram (EEG) and evoked potentials (EPs) examinations. The patients′ consciousness was evaluated again before discharge, the results of CNPVSS and electrophysiological examinations were recorded, and the correlation between the results and the changes of the consciousness was analyzed statistically.Results:The results of CNPVSS was positive correlated with near-term curative effect ( r=0.401, P=0.005); the rate of awakening after treatment was 46.2% among those who were scored as minimally conscious state (MCS) by CNPVSS; the rate of awakening after treatment was 17.1% among those who were at vegetative state (VS) or in a coma; the rate of awakening after treatment of the MCS patients was higher than those of the patients at VS or in a coma ( χ2=4.255, P=0.039). The recordings of right somatosensory evoked potentials (SSEPs) N20 was positive correlated with curative effect ( r=0.312, P=0.031); and the left visual evoked potentials (VEPs) V100 was positive correlated with curative effect ( r=0.285, P=0.049). There were no statistical significance found between other electrophysiological recordings with curative effect. Conclusion:CNPVSS can be an important tool to predict the outcome of the rehabilitation treatment combined with HBO for the patients with chronic disorder of consciousness, and the recordings of SSEPs and VEPs also are of a certain reference value in predicting the prognosis.

Neuropathic pain is a class of pain caused by an injury or diseases of the somatosensory system and characterized by spontaneous pain,allodynia,and hyperalgesia.It is well established that central sensitization is one of the key mechanisms underlying the development and maintenance of neuropathic pain.Cannabinoid receptor 1 (CB1R) of endocannabinoid system modulates synaptic transmission,regulates synaptic plasticity,inhibits central sensitization,and thus attenuates neuropathic pain.Recent studies have shown that activation of CB1R also involves in the relief of neuropathic pain-induced depression.

Objective To observe the effect of hippocampal DNA methyltransferases (DNMTs)on neonatal cognitive impairments induced by sevoflurance exposure.Methods Sixty-four 7-day old male Sprague-Dawley rats were randomly divided into the following four groups (n =1 6):control group (group C),sevoflurane group (group S),sevoflurane+NaCl group (group SN),and sevoflurane+5-AZA group (group SA).Sevoflurane animals received 3% sevoflurane plus 30% oxy-gen for 2 hours daily for 3 consecutive days,and rats in group C were placed into the same container, which contained 30% oxygen only.Animals in group SA were intracerebroventricularly injected with 5-AZA (1 mg/kg),while group SN same volume of NaCl one hour before sevoflurane exposure. Open field and Morris water maze were given the four weeks after anesthesia (n =8).Rats without any behavior tests from each group (n =8)were euthanized 4 weeks after the treatment and the hip-pocampus was harvested.Quantitative real-time PCR and Western blot were used to detect the mRNA and protein levels of DNMT1,DNMT3a and DNMT3b.Results In the open field test,no significant difference was observed in the distance travelled and the time spent in the center of the arena.Com-pared with the group C,group S showed an increase in the latency,decreased time spent in the target quadrant,and the mRNA and protein levels of DNMT3a and DNMT3b in the hippocampus were sig-nificantly increased (P < 0.05).Compared with the group SN,group SA showed a decrease in the la-tency,more time spent in the target quadrant,and the mRNA and protein levels of DNMT3a and DNMT3b in the hippocampus were decreased (P < 0.05).There was no significant difference in the expression of DNMT1 among the four groups.Conclusion Sevoflurane exposure induces neonatal cog-nitive impairments later in life,which was accompanied by the increased mRNA and protein levels of DNMT3a and DNMT3b in the hippocampus.By contrast,pretreatment of 5-AZA decreased hipp-ocampal DNMT3a and DNMT3b,and ameliorated cognitive impairments.These results suggest that DNMTs are involved in sevoflurane induced neonatal cognitive impairments.

BACKGROUND: The inoculation of hybridoma cell strain onto mouse abdominal cavity may obtain ascites containing mass antibody. Previous method to purify monoclonal antibody in ascites is complex and difficult to operate.OBJECTIVE: To prepare, purify and label anti-human leukocyte antigen (HLA)-I class molecule light chain monoclonal antibody, and to detect the expression of tumor cell surface HLA-I class molecules. METHODS: Hybridoma cells were inoculated onto the mouse abdominal cavity. Ascites containing anti-human light chain beta2-microglobulin antibody were obtained and purified with the modified caprylic acid-ammonium sulfate method. The purified monoclonal antibody was labeled with fluorescein isothiocyanate to detect peripheral blood mononuclear cells, T2 cells expressing blank HLA-A2 molecule and K562 cells surface HLA-I class molecules. The expression of HLA-I class molecules was determined by using flow cytometry and fluorescent microscopy. RESULTS AND CONCLUSION: The purified anti-human light chain beta2-microglobulin-fluorescein isothiocyanate monoclonal antibodies accounted for 96% purity. Flow cytometry results showed that, the HLA-I class molecules were highly expressed in peripheral blood mononuclear cells surface, lowly expressed in T2 cells, and not expressed in K562 cells surface. It is a simple and convenient method to purify ascites with the modified caprylic acid-ammonium sulfate method, and according prepare anti-human light chain beta2-microglobulin-fluorescein isothiocyanate. This method is effective to distinguish the levels of HLA-I class molecules expressed in various cells.