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Objective:To analyze the abnormal dose monitoring result of radiation staff in medical institutions and provide a basis for standardizing the personal dose management of radiation staff in medical institutions.Methods:Through the occupational radiation disease monitoring subsystem of the National Radiation Health Information Platform, 516 individual dose monitoring abnormal result of 410 radiation workers in a single monitoring period, which in 168 medical institutions under the 18 cities in Henan province were collected from 2020 to 2022 as research objects. Based on gender, age, length of service, occupational category, medical institution level, whether the dosimeter wearing standard, the abnormal result of radiation workers were grouped to analyze the influencing factors of individual dose monitoring result.Results:The incidence of abnormal individual dose monitoring result in 2020-2022 was 6.83 × 10 -3, 5.22 × 10 -3 and 6.30 × 10 -3, respectively. Abnormal results were mainly distributed in male radiology workers (66.83%), diagnostic radiology (59.51%) and interventional radiology (34.63%), tertiary (54.39%) and secondary medical institutions (36.34%). In the case of wearing personal dosimeter in a standard or irregular way, there were statistically significant differences in the incidence of abnormal outcomes between different levels of medical institutions and different occupational categories( χ2=14.42, 6.56, 32.96, 177.15, P<0.05). The median annual individual dose of radiology workers with " abnormal exposure dose" due to increased workload was 3.95 mSv, and the annual individual dose of interventional radiology workers was higher than that of radiotherapeutic workers ( Z=5.07, P<0.05). Conclusions:The education and training of radiological protection should be strengthened, and the wearing of individual dosimeters should be standardized; focus on the occupational exposure of interventional radiology staff, and take effective measures to reduce their exposure dose.
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Objective To investigate and analyze the cause of the abnormal results in the individual dose monitoring conducted by this laboratory from 2014 to 2017. Methods Radiologic workers wear personal thermoluminescent dosimeters to monitor the individual dose equivalent HP(10). A statistical analysis is conducted on the results above the investigation level. Results During the time when our individual dose monitoring was conducted from 2014 to 2017, this laboratory had detected 69 person-time abnormal results in 40 workplaces, of which 83% occurred in the profession of diagnostic roentgenology. 54% of the dose level range from 1.25 to 5.00 mSv. The main causes of the abnormal results include improper wearing of personal dosimeters (67%), unknown causes (20%), increased workload (10%) and equipment maintenance (3.0%)etc. Conclusion Radiation workplaces should enhance the management of radiologic workers, improve their trainings on radiation protection and raise their protection awareness.
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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.
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Objective To analyze the parametric errors during the use of Sysmex CA-1500 automated coagulation analyzer and their treatment measures .Methods Blood samples with test results showing “*”and without figure results were collected .Sysmex CA-1500 automated coagulation analyzer was employed to retest prothrombin time (PT ) ,activated partial thromboplastin time (APTT) and fibrinogen(FIB) .Results FIB ,PT and APTT were found abnormal in 226 cases(95 .77% ) ,5 cases(2 .12% ) and 5 cases(2 .12% ) ,respectively ,with FIB the mainly .ERR008 ,ERR004 ,ERR016 ,ERR002 ,ERR032 and ERR100 were found abnormal in 227 cases(76 .95% ) ,64 cases(21 .69% ) ,one case(0 .34% ) ,one case(0 .34% ) ,one case(0 .34% ) and one case(0 .34% ) ,respec-tively ,with ERR008 the mainly .Difference of no-error results between the initial and repeat test of PT and APTT showed no statis-tical significance(P>0 .05) ,while those of FIB demonstrated statistical significance (P<0 .01) .Conclusion Samples with paramet-ric errors during the use of Sysmex CA-1500 automated coagulation analyzer should be retested to promote the quality of blood co-agulation detection .