ABSTRACT
Objective:To analyze and learn about the dose to the lens of the eye of interventional radiology workers in some hospitals in shaanxi province from 2018 to 2020.Methods:From 2018 to 2020, three tertiary hospitals in shaanxi province were selected to monitor the dose to the lens of the eye of interventional radiology workers for three consecutive years. Monitoring was made for 152 person times, lasting for a monitoring period of 3 months. Analysis and comparison were carried out of dose equivalents to the interventional radiology workers in terms of different sexes, positions and departments, together with associated influencing factors during the three years.Results:The difference in equivalent dose between the three years is statistically significant ( χ2=29.15, P<0.05), and a downward trend in the average annual equivalent dose was found from 2018 to 2020. The number of interventional radiology workers who received doses to the lens of the eye mainly between MDL and 5.0 mSv accounted for 69.08%. The difference in the average annual equivalent dose in different positions and departments was statistically significant ( H=18.44, 22.55, P<0.05). The average annual equivalent dose to doctor was higher than for nurses and technicians ( Z=-3.36, -3.02, P<0.05). The average annual equivalent dose in cardiovascular medicine department was higher than in other departments, with statistically significant difference ( Z=-2.58, -3.76, -3.40, P<0.05). Logistics regression analysis showed that radiation working hours, positions, routine personal doses, workload and exposure time are the factors that affect the average annual equivalent dose. Conclusions:The annual equivalent dose to the lens of the eye of interventional radiology workers in shaanxi province meets the relevant national standards. However, the annual dose to some radiological workers has a normal high value. Therefore, it is necessary to strengthen the continued monitoring of the dose to the lens of the eye of the interventional radiology workers, and adjust the types of work for the workers based on radiation work hours, position, routine personal dose, workload and exposure time, so as to effectively reduce the dose level of the eye lens.
ABSTRACT
@#<b>Objective</b> To understand the basic information on radiological health technical service institutions in Shaanxi Province, China and analyze the main problems, and to strengthen the capacity building of radiological health technical service institutions in Shaanxi Province. <b>Methods</b> The radiological health technical service institutions registered in Shaanxi Province were investigated and analyzed by means of a questionnaire and literature review. <b>Results</b> There were 20 radiological health technical service institutions in Shaanxi Province, including 7 state-owned ones and 13 privately owned ones; of all the institutions, there were 3 disease control institutions, and 15 institutions obtaining the qualification of radiation protection evaluation, radiation health protection testing, and individual dose monitoring at the same time. The total number of radiation workers in the institution was 237, including 48.5% aged less than 35, 68.8% with bachelor degree or above, 54.4% with intermediate professional title or above, 26.5% with a major related to radiation protection, and 79.3% with national and provincial training. The institutions were equipped with 309 testing instruments, of which the radiation diagnostic performance testing equipment accounted for the largest proportion (52.4%). <b>Conclusion</b> The service scope and capacity of radiological health technical service institutions in Shaanxi Province can meet the current needs of the province, but the institutions need to be improved in terms of personnel, equipment, and service quality. The quality control of institutions needs to be strengthened to standardize the service behavior in the whole province.
ABSTRACT
OBJECTIVE: To study effects and mechanism of sub-chronic aluminum-maltolate complex [Al( mal)3]exposure on mitochondrial damage of hippocampus in rats. METHODS: Sixty specific pathogen free healthy adult male SD rats were randomly divided into 5 groups: a blank group,a control group,a low-,a medium- and a high-dose group,with 12 rats in each group. Blank group was not treated. Low-,medium- and high-dose groups were treated with 0. 41,0. 81,1. 62 mg / kg body weigh of Al( mal)3solution respectively. The control group was treated with an equal volume of saline. Al( mal)3exposure was conducted by intraperitoneal injection every other day for 90 days. The activities of Na+-K+-ATPase and Ca2 +-Mg2 +-ATPase in hippocampus were tested by chemical colorimetric technique. Western blot analysis was used to detect the relative expression of cytochrome oxidase Ⅳ( Cox Ⅳ),dynamin-related protein 1( Drp1),optic Atrophy 1( Opa1),mitofusin( Mfn) 1,and Mfn2 in hippocampus. RESULTS: The activity of Na+-k+-ATPase in high-dose group was significantly lower than those in blank-,control-,and low-dose groups( P < 0. 05). The activity of Ca2 +-Mg2 +-ATPase in medium-dose group was significantly lower than those in blank group( P < 0. 05),and that in high-dose group was significantly lower than those in the other four groups( P < 0. 05). The relative expression levels of CoxⅣ in mediumand high-dose groups were lower than those of the other three groups( P < 0. 05). The relative expression levels of Drp1 and Mfn2 in medium-and high-dose groups were significantly higher than those in blank-,control and low dose group( P <0. 05). The relative expression levels of Opa1 in medium- and high-dose groups were significantly higher than those in blank-,control- and low-dose groups( P < 0. 05). The relative expression levels of Mfn1 in medium- and high-groups were significantly higher than that in blank group( P < 0. 05). CONCLUSION: The mitochondria of rat hippocampus was damaged by the sub-chronic aluminum-maltolate exposure. The damage may be related to the change of mitochondrial dynamics.
ABSTRACT
Objective@#To explore the influence of smoking and polycyclic aromatic hydrocarbons (PAHs) on urinary 8-hydroxydeoxyguanosine (8-OHdG) in coke oven workers and investigate their dose-dependent relationships.@*Methods@#A total of 436 workers exposed to coke oven emissions (COEs) and 132 controls were recruited in this study. Questionnaires were completed in a personal interview. Then their urine samples were also collected and the concentrations of urinary four OH-PAHs and 8-OHdG were determined by high performance liquid chromatography (HPLC) which was used to evaluate the levels of occupational PAHs internal exposure among workers and the DNA damage.@*Results@#The differences of concentrations of urinary 2-NAP (2-hydroxynathalene) , 2-FLU (2-hydroxyfluorene) , 9-PHE (9-hydroxyphenanthrene) , 1-OHP (1-hydroxypyrene) between exposure group and control group were statistically significant (P<0.05) . In exposure group and control group, the level of 8-OHdG in heavy smoking workers were significantly higher than that in other groups (P<0.05) . Multivariate logistic regression analysis revealed high levels of urinary 8-OHdG were associated with a significantly increased risk of having higher urinary1-hydroxypyrene levels[OR=1.43 (95%CI: 1.06-1.94) , P<0.01] and heavy smoking [OR=1.44 (95%CI: 1.08-1.91) , P<0.01], respectively. Trend test showed that linear dose response relationship between smoking, 1-OHP in urine and higher concentrations of 8-OHdG (P<0.05) . Smoking could significant modify the effects of urinary 1-hydroxypyrene, while co-exposure to both heavy smoking and high urinary 1-hydroxypyrene levels[OR=5.64 (95%CI: 2.15-14.80) , P<0.05].@*Conclusion@#Urinary 1-hydroxypyrene is a useful biomarker for evaluating total PAHs exposure, coke oven workers with heavy smoking present more serious DNA oxditive damage.
ABSTRACT
Objective To explore the surgical techniques and clinical outcome of standard large trauma craniotomy in the treatment of acute subdural hematoma.Methods The clinical data of 51 cases with acute subdural hematoma,who underwent standard large trauma craniotomy in recent 5 years in our department,were retrospectively analyzed.Results All the patients were followed up for 3 ～ 6 months.10 cases were dead,4 persistent vegetative status,severe disability in 6 cases,midrange disability occurred in 11 cases and 20 cases were good.Postoperative complications included tardive haematoma in 4 cases,traumatic cerebral infarction in 2 cases,subdural collection of fluid in 4 cases,cerebromalacia in depressor area in 2 cases,hydrocephalus in 2 cases,and traumatic epilepsy in 3 cases.Conclusion Standard large trauma craniotomy is an effective approach in the treatment of acute subdural hematoma,due to its advantages such as satisfactory exposure for haemostasis,rapid removal of haematoma and relief of acute intracranial hypertension.