Analyzing the abnormal results of personal dose monitoring of medical radiation workers / 中国职业医学

OBJECTIVE: To analyze the abnormal results and their causes of personal dose monitoring on medical radiation workers.METHODS: The medical radiation workers monitored from 2016 to 2019 in the personal dose monitoring room of Guangdong Province Hospital for Occupational Disease Prevention and Treatment were selected as the study subjects using convenient sampling method. The abnormal results and their causes of the medical radiation workers with personal dose equivalent ≥1.25 mSv(investigation level) in a single period were analyzed. RESULTS: The rate of abnormal results of personal dose monitoring was 0.26%(263/102 284). The false result rate was 0.19%(194/102 284), and that of the true result rate was 0.07%(69/102 284). A total of 73.38%(193/263) of medical radiation workers had abnormal results with an personal dose equivalent less than 5.00 mSv. Among different occupational groups, the abnormal results and false results in personal dose monitoring in interventional radiology group were the highest(all P<0.01). The abnormal result rate and false result rate were higher in the Pearl River Delta area than that in the non-Pearl River Delta area(0.27% vs 0.17%, 0.20% vs 0.12%, all P<0.05). The rate of false result of personal dose monitoring in the tertiary hospitals was lower than that in the non-tertiary hospitals(0.18% vs 0.30%, P<0.05). The main reason for the true results of personal dose monitoring was the increase of workload(43.48%), and the main reason for the false results was that the dosimeter was left in the workplace(57.73%). CONCLUSION: The rate of abnormal results of personal dose monitoring in the medical radiation workers is high. Radiological protection should be strengthened with emphasis on medical radiation workers in interventional radiology, Pearl River Delta area hospitals and non-tertiary hospitals.

Ocular lens opacity in residents of areas with high natural radiation background in Yangjiang City, China / 中国职业医学

OBJECTIVE: To investigate the effects of long-term and low dose ionizing radiation on ocular lens opacities of residents living in areas with high natural radiation background(HNRB) in Yangjiang City, China. METHODS: A total of 483 Han residents from Yangjiang City(HNRB area) and 517 from Enping City(control area) were selected as study subjects using a cluster random sampling method. Questionnaire survey and lens examination were carried out. The risk factors of lens opacity and its severity were analyzed by logistic regression analysis. RESULTS: The prevalence rates of lens opacity, cortical opacity and posterior subcapsular opacity in HNRB area were higher than those in control area(60.7% vs 51.6%, 53.4% vs 46.8%, 21.9% vs 9.3%, all P<0.05). There was no significant difference in karyotype turbidity between HNRB area and control area(52.4% vs 47.6%, P>0.05). After adjusting for confounding factors including age, gender, cardiovascular/metabolic diseases, smoking, alcohol drinking and tea drinking, the unconditional logistic regression analysis results showed that the risk of ocular opacity, cortical opacity and posterior subcapsular opacity in residents of HNRB area was higher than that in control area(all P<0.05). Multivariate disordered logistic regression analysis results showed that residents in the HNRB area had a higher risk of grade two karyotype turbidity than grade one karyotype turbidity(P<0.01). Ordered logistic regression analysis results showed that residents in HNRB area had an increased risk of developing severe cortical turbidity(P<0.01). CONCLUSION: Long-term and low dose ionizing radiation exposure may increase the risk of ocular lens opacity, especially cortical and posterior subcapsular cataract, and affect the severity of the disease.

Clinical and pathological analysis of 41 cases of acute leukemia combined with intracranial hemorrhage / 中国实验血液学杂志

This study was aimed to summarize the clinical and pathological features of patients with acute leukemia combined with intracranial hemorrhage. The clinical and pathological data of 41 adult patients diagnosed as acute leukemia in our hospital from 1953 to 1990 year were analyzed retrospectively. The results showed that there were 35 cases of AML, 6 cases of ALL; 9 cases in clinical hematologic remission, 32 cases in non-remission, 3 cases of AL with hypertension, 2 cases of AL with diabetes, 4 cases of AL with sepsis, 19 cases with WBC ≥ 100×10(9)/L; the pathologic examination showed 4 cases of AL accompanied with disseminated intravascular coagulation, 10 cases with prothrombin time INR ≥ 1.5, 26 cases with multifocal intracranial hemorrhage, 7 cases with single intracranial hemorrhage, 8 cases with diffused spotting intracranial hemorrhage; the examination also showed that 84 hemorrhage foci were found in 41 cases of AL, among them 46 foci located under cerebral cortex, 23 foci in cerebellum, 6 in basal ganglia, 5 foci in pons, 2 foci in thalamus, 2 foci in spinal cord. It is concluded that the intracranial hemorrhage is a major cause resulting in death of AL patients which should be think highly, and the diagnosis and treatment should be conducted through comprehensive analysis.

Correlation between Serum Brain Natriuretlc Peptide and Cardiac Function in Children with Pneumonia / 实用儿科临床杂志

Objective To explore the correlation between serum brain natriuretlc peptide(BNP) and cardiac function in children with pneumonia.Methods Fifty-two children with pneumonia were seleated.Among them 20 were complicated with congestive heart failure(CHF),including 9 boys and 11 girls,their ages ranging from 4 months to 4 years old;and 32 cases non-complicated with CHF,including 17 boys and 15 girls,their ages ranging from 5 months to 6 years old.Besides,there were 30 healthy children as control group,including 16 boys and 14 girls,their ages ranging from 6 months to 5 years old.For all the children,their serum BNP was measured by using ELISA met-hod,and CK-MB was measured by automatic biochemistry analyzer.In the sametime,their cardial function was measured by echocardiography.Results In the children with pneumonina complicated with CHF,the levels of serum BNP[(182.45?57.32) ng/L] and CK-MB [(48.19?16.08) IU/L] were higher than those of healthy control group[(35.12?13.84) ng/L,(11.48?4.29) IU/L Pa0.05).The levels of left ventricular ejection fraction(LVEF),left ventricle shortening fraction(FS),peak flow velocity of arteriae arota(PFVA),peak flow velocity of pulmonary artery(PFVP) in the children with pneumonia complicated with CHF were lower than those of healthy control group(Pa0.05).There was a positive correlation between the levels of serum BNP and CK-MB(r=0.28 P0.05).Conclusion The levels of serum BNP may be an important index in diagnosis of infant pneumonia complicated with CHF.