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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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To present an overview of the indicators of effective dose equivalent assessment in interventional radiology and dosimetry algorithms,together with some problems attracting controversy so far.By literature consultation at home and abroad,some discussions were made on dosimetry algorithms in interventional radiology worldwide,main factors affecting accuracy of the method and the discussions on the optimal position of dosimeter.Suggestions are made on the basis of the recent research result and present dosimeters wearing conditions for reference.
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AIM: To evaluate pulmonary function tests and blood parameters and their relationship with sociodemographic data for radiology staff continuously exposed to ionizing radiation. SUBJECTS AND METHOD: Thirty-eight personnel from Suleyman Demirel University Training and Research Hospital, Radiology Unit, were included in this study. Sociodemographic data were evaluated by a questionnare that was developed by the researchers. Height and weight measurements were performed with a standard scale and meter. Routine blood parameters and spirometric lung function measurements of the cases were recorded. Statistical significances were determined by independent t-test, analysis of variance (ANOVA), bivariate correlation and Kruskal-Wallis tests using SPSS 18.0. RESULTS: The mean age was 32.42 ± 5.5 years; 19 patients (50%) were male and 19 patients (50%) were female. Body mass index (BMI) was calculated as 25.68 ± 0.47 for men and 24.58 ± 1.13 for women. Forced vital capacity (FVC), forced expiratory volume in the 1st second (FEV1), peak expiratory flow (PEF) and maximum mid-expiratory flow (FEF25-75) showed statistically significant differences between gender (p < 0.01). In addition, FEV1 and FEF25-75 also demonstrated statistically negatively significant difference with the type of task (p < 0.05). A statistically significant negative difference was found between FEF25-75 value and time to start smoking (p < 0.05). Among FVC, FEV1, PEF and FEF25-75 values and alcohol usage, statistically significant positive difference was detected (p < 0.05). Statistically significant positive difference was found among FVC, PEF and FEF25-75 values and sports activity (p < 0.05). According to BMI groups, statistically significant positive difference with FVC, FEV1 and PEF values were found (p < 0.05). Statistically significant correlations were found among FVC value and haemoglobin level (Hgb), haematocrit level (Hct) and mean corpuscular volume (MCV), among FEV1 value and Hgb, MCV, among PEF value and red blood cell count (RBC), Hgb, Hct, MCV, red cell distribution width (RDW), and between FEF25-75 value and MCV. CONCLUSION: Although respiratory functions of radiology staff are affected by many factors, continuous exposure to ionizing radiation is one of the important parameters. Radiology staff should be informed about factors that negatively affect the respiratory functions.
OBJETIVO: Evaluar las pruebas de función pulmonar y parámetros de sangre y su relación con los datos sociodemográficos para el personal de radiología continuamente expuesto a la radiación ionizante. SUJETOS Y MÉTODO: Este estudio incluyó treinta y ocho miembros del personal de la Unidad de Radiología del Hospital de Docencia e Investigación de la Universidad Suleyman Demirel. Los datos sociode-mográficos se evaluaron mediante un formulario que fue desarrollado por los investigadores. Se realizaron mediciones de la altura y el peso con un metro y una escala estándar. Se registraron los datos de rutina sobre los parámetros de sangre y las mediciones de la función pulmonar espirométrica de los casos. La respectiva importancia estadística fue determinada mediante la prueba t independiente, análisis de varianza (ANOVA), correlación bivariada y pruebas de Kruskal-Wallis utilizando SPSS 18.0. RESULTADOS: La edad promedio fue de 32.42 ± 5,5 años; 19 pacientes (50%) eran varones y 19 pacientes (50%) eran mujeres. El índice de masa corporal (IMC) se calculó como 25.68 ± 0.47 para los hombres y 24.58 ± 1.13 para las mujeres. La capacidad vital forzada (CVF), el volumen espiratorio forzado en el primer segundo (VEF1), el flujo espiratorio máximo (FEM), y los valores del flujo espiratorio medio máximo (FEMM25-75) mostraron diferencias negativas estadísticamente significativas entre géneros (p < 0.01). Además, el VEF1 y el FEMM25-75 también mostraron diferencias negativas estadísticamente significativas en relación con el tipo de la tarea (p < 0.05). Se halló una diferencia negativa estadísticamente significativa entre el valor de FEMM25-75 y el tiempo del inicio del hábito de fumar (p < 0.05). Se detectó una diferencia positiva estadísticamente significativa entre los valores de CVF, VEF1, FEM y FEMM25-75, y el hábito de consumir alcohol (p < 0.05). Se detectó una diferencia positiva estadísticamente significativa entre los valores de CVF, FEM y FEMM25-75, y las actividades de deporte (p < 0.05). Según los grupos de IMC, se halló una diferencia positiva estadísticamente significativa positiva entre los valores de CVF, VEF1, y los valores de FEM (p < 0.05). Se hallaron correlaciones estadísticamente significativas entre el valor de CVF y el nivel de la hemoglobina (Hgb), el nivel de hematocrito (Hct) y el volumen corpuscular medio (VCM); entre el valor de VEF1 y Hgb, VCM; entre el valor de FEM, y el conteo de glóbulos rojos (CGR), Hgb, Hct, VCM, y la distribución de los glóbulos rojos;y entre el valor de FEMM25-75 y VCM. CONCLUSIÓN: Aunque las funciones respiratorias del personal de radiología son afectadas por muchos factores, la exposición continua a la radiación ionizante es uno de los parámetros importantes. El personal de radiología debe ser informado acerca de los factores prevenibles que afectan negativamente las funciones respiratorias.