Objective To investigate the basic conditions of non-medical radiation institutions and their current status of occupational health management of radiation workers and radiation protection in workplaces in Tianjin City, China, and to clarify the key points of occupational health management and radiation protection efforts. Methods A comprehensive survey was conducted to assess the basic conditions of non-medical radiation institutions and their status of occupational health management for radiation workers across 16 districts in Tianjin in 2023. Then, some non-medical radiation institutions were chosen according to their industrial sections as sentinel institutions to investigate radiation protection in workplaces. Results In 2023, there were a total of 431 non-medical radiation institutions in 16 districts of Tianjin, primarily in the industries of nuclear instrument, industrial radiography, and others. In these institutions, there were a total of 5264 radiation workers, with 93.8%, 93.0%, and 93.7% participating in the training of radiation protection, the occupational health examination, and the personal dose monitoring, respectively. Eighty-six non-medical radiation institutions were chosen as the sentinel institutions for investigation of radiation protection conditions in workplaces. The resulting data met the stipulated limits according to relevant standards. Conclusion The current status of occupational health management and radiation protection in non-medical radiation institutions in Tianjin is satisfactory. However, there is a need for further management enhancements, particularly in key industries such as nuclear instrumentation and industrial radiography.

Objective To investigate the basic conditions of non-medical radiation institutions and their current status of occupational health management of radiation workers and radiation protection in workplaces in Tianjin City, China, and to clarify the key points of occupational health management and radiation protection efforts. Methods A comprehensive survey was conducted to assess the basic conditions of non-medical radiation institutions and their status of occupational health management for radiation workers across 16 districts in Tianjin in 2023. Then, some non-medical radiation institutions were chosen according to their industrial sections as sentinel institutions to investigate radiation protection in workplaces. Results In 2023, there were a total of 431 non-medical radiation institutions in 16 districts of Tianjin, primarily in the industries of nuclear instrument, industrial radiography, and others. In these institutions, there were a total of 5264 radiation workers, with 93.8%, 93.0%, and 93.7% participating in the training of radiation protection, the occupational health examination, and the personal dose monitoring, respectively. Eighty-six non-medical radiation institutions were chosen as the sentinel institutions for investigation of radiation protection conditions in workplaces. The resulting data met the stipulated limits according to relevant standards. Conclusion The current status of occupational health management and radiation protection in non-medical radiation institutions in Tianjin is satisfactory. However, there is a need for further management enhancements, particularly in key industries such as nuclear instrumentation and industrial radiography.

BACKGROUND:Studies have shown that both Panax notoginseng saponins and concentrated growth factor can promote fracture healing,but there are few studies addressing their combined effects on fracture healing.Panax notoginseng saponins may accelerate fracture healing by promoting the release of concentrated growth factor-related factors over a certain period of time. OBJECTIVE:To study the effect of Panax notoginseng saponins on concentrated growth factor release and fracture healing in rats. METHODS:Eighteen 8-week-old Sprague-Dawley rats were numbered and randomly divided into three groups:Panax notoginseng saponins group,model control group and blank group.Panax notoginseng saponins group was fed with Panax notoginseng saponins for 2 weeks.Model control group was given 2 mL of normal saline for 2 weeks and blank group was fed normally.Concentrated growth factor was obtained by the centrifugation method both from the Panax notoginseng saponins group and model control group.After 1 week of normal feeding,all animals underwent modeling for femoral fracture.The Panax notoginseng saponins group and the model control group were implanted with autologous concentrated growth factor,and then the release concentration of growth factors at different time points(1 hour,1,3,5,7,9 and 11 days)were measured by ELISA.Fracture healing was assessed based on postoperative X-ray and hematoxylin-eosin staining of bone tissues. RESULTS AND CONCLUSION:Compared with the model control group,the Panax notoginseng saponins group had higher release concentrations of vascular endothelial growth factor A and transforming growth factor β at 7,9,and 11 days,Platelet-derived growth factor BB at 5,9,and 11 days,and basic fibroblast growth factor at 1-11 days(P<0.01).X-ray examinations indicated that fracture healing in the Panax notoginseng saponins group was better than that in the model control group,and fracture healing in these two groups was better than that in the blank group at 2 months after surgery.Hematoxylin-eosin staining results found that the constituent osteocyte density in the Panax notoginseng saponins group was greater than that in the model control group,and the constituent osteocyte density in these two groups was better than that in the blank group.These findings indicate that Panax notoginseng saponins can increase the concentration of concentrated growth factor-related factors.After intervention with Panax notoginseng saponins,concentrated growth factors are more advantageous in promoting fracture healing in rats.

Objective The amplitude of low-frequency fluctuation(ALFF)resting state functional magnetic resonance imaging(rs-fMRI)was used to investigate the signals image in the brain functional areas of overactive bladder(OAB)patients.Methods OAB patients treated in 3 participating hospitals during Mar.2021 and Mar.2023 were selected as the OAB group(n=14).Healthy subjects matching the gender,age and years of education of the patients in the OAB group were collected as the control group(NC group,n=14).Changes in the over active bladder symptom score(OABSS),quality of life scale(QoL),self-rating depression scale(SDS),self-rating anxiety scale(SAS)were analyzed.All subjects underwent rs-fMRI to collect blood oxygen level dependent magnetic resonance signals,which were then processed with ALFF.Two-sample t-test was conducted on the results to obtain the different brain regions.Results The OABSS[(8.07±0.37)vs.(1.21±0.18)],QoL[(4.85±0.21)vs.(0.64±0.13)],SAS[(60.14±1.40)vs.(37.64±1.57)]and SDS[(52.50±1.29)vs.(36.14±0.34)]scores of the OAB group were higher than those of the NC group,with significant differences(P＜0.05).The brain regions with significant differences in ALFF were located in the left supplementary motor area,left medial superior frontal gyrus and right anterior central gyrus(P＜0.000 1).Conclusion The abnormal spontaneous activity and coordination ability of the brain in resting state may lead to OAB symptoms,which are displayed in the abnormal functions of the left supplementary motor area,left medial superior frontal gyrus and right anterior central gyrus.

Objective To explore the guiding value of thromboelastography(TEG)in the formulation of personalized anticoagulation regimen after knee arthroscopy.Methods A total of 50 patients who underwent knee arthroscopy in our hos-pital from April to August 2023 were randomly divided into two groups.Twenty-seven patients with routine anticoagulation were selected as the control group,and 23 patients with personalized anticoagulation were selected as the experimental group.Conventional anticoagulation was a prophylactic dose of low molecular weight heparin calcium(LMWHC)selected according to body weight,once a day to 7 days after surgery.Personalized anticoagulation was performed according to the prophylactic dose of LMWHC until postoperative day 3.On postoperative day 3,LMWHC was changed to aspirin according to the TEG return index(MA>70 mm,α Angle>72°,K value<1 min),and the initial prophylactic dose was 100 mg/d.LMWHC was changed to rivaroxaban when R<5 min,and the prophylactic dose was 10 mg/d until postoperative day 7.Pa-tients with hypocoagulation or subcutaneous ecchymosis stopped the drug first,and if it was further aggravated,component blood transfusion was performed according to the TEG results.The difference of Caprini score in perioperative period,the correlation between TEG and CCT on postoperative day 1,and the accuracy of predicting thrombosis on postoperative day 7 were compared between the two groups using the receiver operating characteristic curve(ROC).Results There was a sig-nificant difference in Caprini score between the two groups at 7 days after operation(P<0.05),suggesting that the adjust-ment of anticoagulant drugs in the experimental group was effective at 3 days after operation.Pearson correlation evaluation showed that there was a strong positive correlation between maximum coagulation intensity(MA)in TEG and platelet(Plt)in CCT at day 1 after surgery(P<0.05).Thrombosis was found in the control group at 7 days after operation,all of which were CMVT and disappeared after therapeutic antithrombotic therapy.MA was included in the ROC curve for model analysis.The area under the ROC curve(AUC)of the control group was 0.819,and the AUC of the experimental group was 0.508.It was found that the control group model had higher accuracy in predicting the formation of CMVT.Conclusion Individu-alized anticoagulation under TEG monitoring can effectively reduce the occurrence of CMVT after knee arthroscopy,which has guiding value for anticoagulation and thrombosis prevention.

Compared with simple stress urinary incontinence (SUI), complicated female SUI is more diverse in etiology and more difficult to treat.Based on domestic and foreign literature and our diagnosis and treatment experience, this paper makes a detailed introduction to the definition, diagnosis, evaluation and clinical treatment of complicated female SUI, so as to provide guidance and reference for the treatment of this disease.

Objective:To study the level of CT dose to paediatric patients in Tianjin, and to provide basic data for establishing the diagnostic reference levels for paediatric patients from CT examinations in Tianjin.Methods:In 2022, a general survey was carried out of the CT doses to the head, chest, abdomen and pelvis of the scanned paediatric patients in two tertiary pediatric hospitals and seven tertiary general hospitals in Tianjin. The scanned pediatric patients were divided into four age groups in terms of the age of -1, -5, -10 and -15 years, and 20 patients were investigated in each age group in each hospital. The basic information were collected on the scanned patients, CT scanning parameters, volume CT dose index (CTDI vol), dose length product (DLP), and the differences in CTDI vol and DLP on the same site among different age groups and different types of hospitals were analyzed. Results:There were significant differences in CTDI vol and DLP between different age groups at the same site (head, chest, abdominal and pelvic, CTDI vol:χ2=296.51, 193.82, 291.72, P<0.001; DLP: χ2=291.22, 263.63, 344.97, P<0.001). There were significant differences in CTDI vol and DLP among different types of hospitals on the same site (head, chest, abdominal and pelvic, CTDI vol:Z=-13.13, -7.57, -15.27, P<0.001; DLP: Z=-9.07, -6.15, -11.57, P < 0.001). Conclusions:The 75 th percentile values of CTDI vol and DLP for pediatric head, chest, abdomen and pelvis CT scanning in tertiary hospitals in Tianjin are at a good level, and the dose on some examination sites are relatively high. Further optimization of pediatric CT scanning procedures is necessary.

Objective:To collect data on urinary flow rate in the elderly female population across the country and to analyze the range of reference values.Methods:This study enrolled 333 subjects from July 2020 to June 2022.The study implementation process was divided into two steps.In the first step, subjects completed an electronic questionnaire, which included basic information about the subject, a short form for urinary incontinence, and a scoring form for the symptoms of overactive bladder syndrome.In the second step, the staff introduced the use of a mobile uroflowmetric device and distributed the instrument and materials.Uroflow rate data were automatically uploaded to a cloud database via the mobile phone.Subsequently, two or more physicians specializing in urinary control performed Uroflow rate-qualifying screenings and conducted statistical analyses.Results:A total of 333 subjects were enrolled in the study, and the researchers collected 1375 qualified urine flow rate records using a mobile urine flow rate instrument.The age of the subjects ranged from 60 to 84 years, with a mean age of 69 years.The reference ranges for urinary flow rate were found to be 24.8-26.2 s, with a mean urinary flow rate of 12.2-12.9 ml/s, a maximum urinary flow rate of 22.2-23.4 ml/s, and a time to peak of 8.5-9.7 s. The study observed a tendency for both maximal and mean urinary flow rates to decrease in older women as their age increased(Pearson correlation coefficient: -0.1, P<0.001). Conclusions:The uroflow rate of older women decreases with aging.Specifically, the average uroflow rate of women over 80 years old is lower than that of other age groups.This study aims to establish normal uroflow parameters for uroflowmetry in healthy older women in China.

Objective:To evaluate the clinical effect of anterior clinoid process grinding in the treatment of ophthalmic / superior clinoid process aneurysms and sellar tumors.Methods:The clinical data of 16 patients who underwent anterior clinoid process grinding in Sanbo Brain Hospital, Capital Medical University from January 2015 to July 2021 were analyzed retrospectively. There were 1 patient with recurrent craniopharyngioma, 1 patient with recurrent pituitary adenoma, 13 patients with aneurysms, and 1 patient with suprasellar granulosa cell tumor combined with ophthalmic aneurysm of right internal carotid artery. The Modified Rankin Scale (mRS) score was used to evaluate the situation at discharge and in the medium-and-long term.Results:Sixteen patients underwent anterior clinoidprocess grinding. At discharge and the latest follow-up, the mRS scores of the patients were 0-2. A total of 15 aneurysms were treated, and there were no symptoms of visual loss or visual field defect after operation. No cerebrospinal fluid leakage occurred in all patients.Conclusions:The grinding of anterior clinoid process can effectively and fully stretch the optic nerve and internal carotid artery, and can observe the tumor neck at the lower end of pituitary stalk and the ocular segment/superior clinoid process of internal carotid artery under direct vision. It is one of the important auxiliary methods for the treatment of sellar lesions.