Objective To assess the current status of microbial and parasitic quality control for laboratory animals in Jiangxi Province by analyzing microbiological and parasitic test results from production facilities between 2020 and 2024, and to provide a basis for enhancing quality control measures. MethodsIn accordance with the current national standards for laboratory animals at the time of testing, the Jiangxi Provincial Laboratory Animal Quality Inspection Station (affiliated to Institute of Occupational Medicine of Jiangxi) conducted microbial and parasitic testing on 451 laboratory animals of 4 species from 6 laboratory animal production units in Jiangxi Province between 2020 and 2024, and analyzed the quality status of laboratory animals in the province. ResultsPasteurella pneumotropica was detected in one mouse sample in 2020, with a detection rate of 5.00%. Pseudomonas aeruginosa was detected in one mouse sample and mouse hepatitis virus antibody was detected in another mouse sample in 2023, with a detection rate of 2.78%, respectively. No microorganisms or parasites that should be excluded from SPF grade mice as specified in the national standards were detected in 2021, 2022, or 2024, with a qualification rate of 100.00%. Pasteurella pneumotropica was detected in four rat samples in 2020, with a detection rate of 20.00%. Pseudomonas aeruginosa was detected in two rat samples in 2021, with a detection rate of 10.00%, and Tyzzer's disease agent antibody was detected in four rat samples in 2024, with a detection rate of 10.00%. No microorganisms or parasites that should be excluded from SPF grade rats as specified in the national standards were detected in 2022 or 2023, with a qualification rate of 100.00%. For rabbits and guinea pigs, no microorganisms or parasites required to be tested for conventional grade rabbits and guinea pigs as specified in the national standards were detected from 2020 to 2024, with the qualification rate of both species reaching 100.00%. ConclusionBased on the microbial and parasitic testing results, the quality of rabbits and guinea pigs in Jiangxi Province is satisfactory. However, some issues persist with rats and mice. It is recommended to enhance the quality of experimental animals in Jiangxi Province by increasing the frequency of random inspections by quality testing units or by improving the self-inspection capabilities of production and user facilities.

Aerosol removal using flame-retardant atomized fixatives, as a major means of aerosol control, has achieved remarkable results in the field of nuclear facility decommissioning and decontamination. Traditional atomized fixatives for aerosol removal have deficiencies in high-temperature resistance and flame retardancy, rendering them inadequate for operational scenarios involving high temperatures and flammability encountered during nuclear decommissioning. This paper investigates the current development of flame-retardant atomized fixatives for aerosol removal both domestically and internationally and presents a preliminary exploration of this technology. The experiments showed that atomized fixatives modified with flame-retardant properties not only maintained excellent aerosol capture efficiency, but also exhibited significantly improved flame-retardant performance. This confirmed the technical feasibility of the proposed approach. Finally, suggestions and reflections are proposed for the development of this technology and its application in nuclear facility decommissioning.

ObjectiveTo explore the mechanism by which Qidan Yifei Tongqiao granules （QDYF） alleviate nasal mucosal remodeling in allergic rhinitis （AR） via the interleukin-33 （IL-33）/growth stimulation expressed gene 2 （ST2）/interleukin-1 receptor accessory protein （IL-1RAP） signaling pathway from the perspective of Qi-replenishing and blood-activating therapy. MethodsFirst， according to the previous network pharmacology results， this study predicted the potential mechanisms of QDYF in treating AR by screening key pathways， components， and targets. Molecular docking was performed via AutoDock and PyMOL 2.5.5. Subsequently， a rat model of ovalbumin （OVA）-induced AR was used for validation through in vivo experiments. Forty-eight rats were assigned into 6 groups： Control， model， low-dose QDYF （QDYF-L， 4.04 g·kg^-1）， medium-dose QDYF （QDYF-M， 8.08 g·kg^-1）， high-dose QDYF （QDYF-H， 16.16 g·kg^-1）， and loratadine （0.9 mg·kg^-1）. After 14 days of intervention， behavioral scores of the rats were observed. The morphological changes of nasal mucosa tissue were observed by hematoxylin-eosin （HE） staining. Masson staining was used to observe collagen fiber deposition in the nasal mucosal tissue and to calculate the collagen volume fraction （CVF）. The expression of E-cadherin （E-cad） in the nasal mucosa tissue was detected by immunofluorescence. The serum levels of helper T cell 2 （Th2） cytokines interleukin-4 （IL-4）， interleukin-5 （IL-5）， and interleukin-13 （IL-13） as well as helper T cell 1 （Th1） cytokines interleukin-2 （IL-2） and interferon-γ （INF-γ） were quantified by enzyme-linked immunosorbent assay （ELISA）. The protein levels of transforming growth factor-beta 1 （TGF-β₁）， IL-33， ST2， and IL-1RAP in the nasal mucosa tissue were determined by Western blot. ResultsIL-33， ST2， and IL-1RAP had strong binding ability with the main active ingredients—wogonin， 7-methoxy-2-methylisoflavone， formononetin， naringenin， stigmasterol， and beta-sitosterol of QDYF， with the binding energy < -4.25 kcal⋅mol^-1（1 cal≈4.184 J）. The results of in vivo experiments showed that compared with the control group， the model group exhibited increased behavioral scores （P<0.05）， aggravated pathological damage of nasal mucosa， increased collagen fiber deposition and CVF （P<0.05）， elevated serum levels of IL-4， IL-5， and IL-13， up-regulated protein levels of TGF-β₁， IL-33， ST2， and IL-1RAP in the nasal mucosa （P<0.05）， down-regulated expression of E-cad， and declined serum levels of IL-2， IFN-γ， and IFN-γ/IL-4 ratio （P<0.05）. Compared with the model group， the QDYF groups and loratadine group showed reduced behavioral scores （P<0.05）， alleviated pathological damage of nasal mucosa， reduced collagen fiber deposition and CVF （P<0.05）， and up-regulated E-cad expression （P<0.05）. Compared with the model group， the QDYF-H group and the loratadine group showed raised levels of INF-γ and IFN-γ/IL-4 ratio （P<0.05）， declined serum levels of IL-4， IL-5， and IL-13， and down-regulated protein levels of TGF-β₁， IL-33， ST2， and IL-1RAP in the nasal mucosa （P<0.05）. In addition， the QDYF-H group exhibited an elevated serum IL-2 level （P<0.05）. The QDYF-M group showed down-regulated protein levels of TGF-β₁， IL-33 and IL-1RAP in the nasal mucosa （P<0.05）. The QDYF-L group demonstrated a down-regulated protein level of ST2 in the nasal mucosa （P<0.05）. ConclusionQDYF may regulate the Th1/Th2 balance through the IL-33/ST2/IL-1RAP signaling pathway， thereby ameliorating nasal mucosal tissue remodeling and alleviating AR.

BACKGROUND:With the development of computer-aided design and computer-aided manufacturing technology,zirconia abutments with a titanium base are widely used in clinic due to its good application advantages,but there are still some problems and a lack of consensus design standards. OBJECTIVE:To review the fabrication methods of Ti-base zirconia abutment,and the effect of abutment connection,emergence design,abutment angle,and bonding on mechanical properties of Ti-base zirconia abutment. METHODS:Relevant literature published from 2010 to 2023 was searched in CNKI and PubMed databases with the search terms"zirconia abutment,titanium base"in Chinese and English,respectively.The search time limit was extended for some classical literature.The relevant literature was obtained through inclusion and exclusion criteria,and 57 eligible documents were included for review. RESULTS AND CONCLUSION:It is recommended that clinicians try to select antirotational titanium bases or rotational titanium bases with a Morse taper connection.Implants should be placed in the correct axial angulation of not more than 15° or with an inclination to the palatal side when using angled zirconia abutments.When a≥30° labial inclination is followed for implant placement,the bite force must be decreased effectively to reduce the risk of mechanical and biological complications of implants,abutments,and prostheses.Ti-base zirconia abutments with a higher gingival height should be selected,and its restorative angle should not exceed 40°.Multilink Hybrid Abutment could be the first choice for extraoral bonding of zirconia abutment to titanium bases.

Objective To analyze the verification results of national laboratories involved in urinary sodium and potassium monitoring. Methods A total of 416 blinded verification samples from 32 monitoring laboratories, which participated in the national 24-hour urinary sodium and potassium detection verification comparison program in 2023 and 2024, were included as the study subjects. These samples were reanalyzed by both the monitoring laboratories and a reference laboratory using the ion-selective electrode method. Results The overall qualification rates for the 32 laboratories were 84.3% (182/216) in 2023 and 82.0% (164/200) in 2024, with 62.5% (20/32) achieving qualified results for two consecutive years. In 2023, centers for disease control and prevention (CDC) laboratories had higher qualification rates than the third-party laboratories for both 24-hour urinary sodium and potassium (95.2% vs 78.8%, 95.2% vs 75.8%, both P<0.05). This difference was not significant in 2024 (87.8% vs 78.0%, 90.2% vs 76.3%, both P>0.05). There was no significant difference in median absolute relative deviation of urinary sodium results from monitoring laboratories between 2023 and 2024 (2.7% vs 2.1%, P>0.05), whereas the median absolute relative deviation of urinary potassium results in 2024 was lower than that in 2023 (3.4% vs 8.4%, P<0.01). Conclusion The detection accuracy of national laboratories for urinary sodium and potassium monitoring shows an overall improving trend, with the accuracy of potassium measurement showing particular enhancement. There is no significant difference in the detection qualification rates between laboratories of the CDC and the third-party laboratories, suggesting that a sustained verification feedback mechanism is key to driving quality improvement.

Objective:To explore the clinical significance of magnetic resonance three dimension arterial spin labeling(3D-ASL)in assessing cognitive impairment of patients with ischemic leukoaraiosis(ILA).Methods:A total of 102 ILA patients admitted to Chongqing Qianjiang National hospital from January 2022 to September 2023 were selected as the case group,and 50 volunteers who underwent physical examination were included in healthy control group according to gender and age matching principles during the same period.The 102 patients were further divided into a cognitive impairment group(35 cases)and a cognitive normal group(67 cases)according to the assessed results of the Montreal cognitive assessment(MoCA)scale.The cerebral blood flow(CBF)value was obtained through conducted 3D-ASL examination.Using multiple logistic regression analysis to identify the relative factors that can affect the occurrence of cognitive impairment in ILA patients,and drawing receiver operating characteristic(ROC)curve to analyze the predictive value of CBF value for the occurrence of cognitive impairment in ILA patients.Results:The paraventricular CBF value,subcortical CBF value,and whole brain CBF values in the case group(13.15±3.25)ml/(100g·min),(10.38±3.45)ml/(100g·min)and(43.59±7.81)ml/(100g·min)were lower than those in the control group(24.45±5.10)(100g·min),(22.65±5.64)ml/(100g·min)and(59.42±10.29)ml/(100g·min),with statistically significant differences(t=14.430,10.276,8.195,P<0.05).Compared with the cognitive normal group,the cognitive impairment group had higher ILA grade,higher proportion of diabetes,older age,higher level of C-reactive protein,homocysteine and fibrinogen,and lower paraventricular CBF value,subcortical CBF value and CBF value of whole brain(x2=6.311,4.965,t=5.894,2.983,4.155,3.243,7.443,8.114,10.251,P<0.05).Multiple logistic regression analysis showed that low paraventricular CBF value,subcortical CBF value,and the whole brain CBF value were independent risk factors for cognitive impairment in ILA patients(OR=0.457,0.498,0.563,P<0.05).The result of ROC curve analysis showed that the area under curve(AUC)value of paraventricular CBF value,subcortical CBF value,and whole brain CBF value were respectively 0.831,0.792,and 0.784 in predicting cognitive impairment in ILA patients.The AUC value of the combination of the three indicators was 0.918,which was significantly higher than that of each single indicator(Z=3.198,3.542,4.112,P<0.05).Conclusion:Magnetic resonance 3D-ASL imaging has better assessment value for cerebral vascular perfusion in ILA patients.A decrease of CBF value can significantly increases the risk of occurring cognitive impairment in patients.The predictive value of the combined assessment of multiple regions of interest(ROI)has higher predictive value for occurrence of cognitive impairment,which can provide strong support for clinical decision-making and guiding the subsequent treatment.

Objective:To compare and analyze the differences in positioning errors and placement outside the target area between two different image-guided systems(Halcyon and Synergy)in radiotherapy for cervical cancer.Methods:The data of 40 patients with cervical cancer who received treatment in Dezhou People's Hospital from March 2023 to June 2023 were retrospectively selected.Each patient was treated respectively with Halcyon linear accelerator and Synergy linear accelerator,with 20 cases for each treatment method.All patients underwent cone beam computed tomography(CBCT)at kV level to conduct image scanning before radiotherapy,and the obtained CBCT images were matched with the positioned CT images by online.The registration results of left and right(x),head and foot(y)and front and back(z)of three translation direction,and pitch(Rx),rotation(Ry)and deflection(Rz)directions of rotation direction were respectively obtained.The margin of planning target volume(MPTV)was calculated according to positioning expansion formula.The differences of positioning errors and target area expansion between Halcyon and Synergy image-guided systems were compared and analyzed.Results:Halcyon and Synergy image-guided systems obtained respectively 479 and 447 sets of CBCT images.The translational errors of Halcyon image-guided system on x,y,and z directions were respectively(-0.03±0.21),(0.12±0.63)and(0.02±0.15)cm,and the rotational errors of that on Rx,Ry and Rz directions were respectively(0.38±1.26)°,(-0.40±1.02)°,and(0.07±1.07)°.The translational errors of Synergy image-guided system were respectively(-0.07±0.18),(0.08±0.49)and(0.11±0.22)cm on the three directions,and the rotational errors of that were respectively(0.28±1.29)°,(-0.29±1.29)° and(-0.16±1.20)°.The translational error values on the y direction of both image-guided system were larger than that on x and z directions,and the absolute values of the range of translational errors of them were basically within 5 mm.There were no statistically significant difference in the positioning errors of rotation on Rx and Ry directions between Halcyon and Synergy image-guided systems(P＞0.05),while there was a statistically significant difference in the positioning error of rotation on Rz direction between them(t=-3.06,P＜0.05).The MPTV values of Halcyon image-guided system on x,y and z directions were respectively 0.4,1.4 and 0.3 cm,and those of Synergy image-guided system were respectively 0.4,0.9 and 0.5 cm.The expansion boundary of target area of Halcyon image-guided system on the y direction was larger than that of Synergy image-guided system,and that on other directions were all less or equal to 0.5 cm.Conclusion:The MPTV values of Halcyon and Synergy image-guided systems can meet clinical requirements in radiotherapy.The positioning errors and the tube current of the scan of Halcyon image-guided system were larger than those of Synergy image-guided system,but the scanning time and treatment time of that were significantly lower than those of Synergy image-guided system.Different treatment systems can be selected individually for patients according to their different conditions.

Objective To analyze the mortality rate and trend of chronic obstructive pulmonary disease(COPD)among residents in Sichuan Province from 2011 to 2023.Methods The collected mortality monitoring data of residents from 2011 to 2023 were analyzed using Joinpoint regression the trend of COPD mortality rate in Sichuan Province from 2011 to 2023.Based on the COPD mortality rate data of residents from 2011 to 2023 to established an autoregressive integrated moving average method(ARIMA)to predict the trend of mortality rate changes.Results From 2011 to 2023,the crude mortality rate of males was 79.74/100,000,which was higher than that of females(64.82/105),and the standardized mortality rate of males(48.02/105)was higher than that of females(40.51/105)(P<0.05).From 2011 to 2023,the annual percentage change(APC)of male mortality rate and female mortality rate were-4.51% and-5.59%(P<0.05),and the APC of standardized mortality rate of male and female were-9.35%,and-9.91%,with a significant downward trend(P<0.05).From 2011 to 2023,the COPD mortality rates of residents aged 45～54,55～64,65～74 and≥75 years in Sichuan Province were-12.04%,-10.88%,-13.87% and-7.19%,respectively,and with an obvious downward trend in different age groups(P<0.05).The crude mortality rate of COPD in urban decreased from 100.67/105 to 52.93/105,and APC of the crude mortality rate was-5.71%;while the crude mortality rate of rural residents decreased from 86.13/105 to 60.10/105,and APC of the crude mortality rate was-3.69%,with an obvious downward trend(P<0.05%).The standardized COPD mortality rate of urban residents in Sichuan Province from 2011 to 2023 decreased from 79.13/105 to 24.09/105,and APC of the standardizedmortality rate was-10.09%;while the rural residents decreased from83.99/105 to 31.58/105,and APCwas-7.98%,with an obvious downward trend(P<0.05%).The ARIMA model was used to fit the COPD mortality rate in Sichuan Province in 2011～2023,and the COPD mortality rates in Sichuan Province in 2024～2028 were predicted to be 53.49/105,49.28/105,46.11/105,42.59/105 and 41.68/105,respectively.Conclusion The mortality rate of COPD among residents in Sichuan Province showed a downward trend from 2011 to 2023,with rural,male,and elderly populations being high-risk groups for COPD mortality.The ARIMA model had certain reference value for short-term prediction of COPD mortality rate.

Objective:To investigate the occurrence and influencing factors of oral frailty among the elderly in China.Methods:General information questionnaire,Oral Frailty Scale,Sarcopenia Screening Questionnaire(SARC-F),Social Network Scale-6(LSNS-6)and Subjective Cognitive Decline Questionnaire(SCD-Q9)were used to conduct a survey in Anhui Province.A survey was conducted among 3 063 elderly people to analyze their current status and influencing factors related to oral frailty.Results:The incidence of oral frailty among the elderly in Anhui Province was 46.82％(1434/3063).Binary logistic regression analysis showed sarcopenia(OR=8.742,95％CI:7.156-10.679),social isolation(OR=1.601,95％CI:1.313-1.953),and subjective cogni-tive decline(OR=2.424,95％CI:1.905-3.085),90 years old and above(OR=2.261,95％CI:1.304-3.922)and having disability(OR=1.341,95％CI:1.040～1.729)are risk factors for oral frailty in the elderly in Anhui Province.Conclusion:The incidence of oral frailty is high among the elderly in Anhui Province.Risk factors for oral frailty include sarcopenia,social isolation,subjective cognitive decline,advanced age,and disability.

Objective:To investigate the application effect of curved incision surgery in the treatment of hammock finger tendon.Methods:45 patients with hammock finger tendon who were admitted to Pingle Orthopedics and Traumatology Hospital in Shenzhen were selected from May 2022 to May 2023,all of whom were treated with curved incision surgery.Wound healing,functional recovery and complication rate were observed after surgery.Results:In this study,45 patients with hammock finger tendon were successfully followed up for 3 to 18 months,with an average follow-up of 1 year.The results of follow-up showed that all the incisions healed in one stage,and there were no complications such as skin infection and necrosis,exposed knots and skin irritation.X-ray reexamination before and after the operation showed,no complications such as loosening of the Kirkner needle,redisplacement of bone mass and nonunion of bone.During the follow-up period,there was no significant recurrence of vertical deformity.Crawford grading showed that,35 cases were excellent,9 were good,and 1 was fair.Conclusion:Using curved incision surgery to treat hammock finger tendon,which has the advantages of less trauma,faster recovery and fewer complications,and the effect is good.