Objective To investigate the value of prone-position MRI of lumbar spine for diagnosing pediatric occult tethered cord syndrome(OTCS).Methods A total of 67 children with suspected tethered cord syndrome(TCS)and confirmed OTCS by surgery were prospectively enrolled as OTCS group,while 73 healthy subjects were recruited as control group.Supine-and prone-position lumbar MR examinations were performed in both groups.The position of filum terminale on prone axial T2WI and the presence or absence of"sunset sign"(i.e.filum terminale located within the dorsal 1/2 of spinal canal on prone axial T2WI)were observed,spinal cord conus mobility was calculated.The efficacy of"sunset sign"for diagnosing OTCS in children was calculated through comparison between groups.Receiver operating characteristic curve was drawn,the area under the curve(AUC)was calculated to evaluate the diagnostic efficacy of spinal cord conus mobility.Results On prone-position axial T2WI,"sunset sign"was found in 58 cases(58/67,86.57％)but not in 9 cases(9/67,13.43％)in OTCS group,which was not even observed in control group.The sensitivity of"sunset sign"for diagnosing pediatric OTCS was 86.57％(58/67),with specificity of 100％(73/73),positive predictive value of 100％(58/58)and negative predictive value of 89.02％(73/82).The spinal cord conus mobility was(19.30±5.89)％in OTCS group and(31.71±6.58)％in control group,being statistically different between groups(t=-11.722,P＜0.001).The sensitivity,specificity and AUC of spinal cord conus mobility for diagnosing pediatric OTCS was 80.60％,90.41％and 0.920,respectively.Conclusion Prone-position MRI of lumbar spine could be used in diagnosing pediatric OTCS.

Primary aldosteronism (PA) is one of the most common causes of secondary hypertension, and is one of the risk factors of cardiovascular and metabolic diseases. Its incidence increases with the increase of hypertension level. The early diagnosis and treatment of PA are important. The subtype classification of PA is vital but challenging, which is related to the treatment options. Although adrenal vein sampling (AVS) is currently recognized as the gold standard for subtype diagnosis of PA, it′s an invasive test that is technically challenging and expensive, which limits its clinical use. As a non-invasive imaging method, 68Ga-Pentixafor PET/CT can visualize, locate and characterize the lesions, and facilitate PA subtyping. This article reviews the research of 68Ga-Pentixafor PET/CT in the subtype diagnosis of PA.

Objective:To explore the effects of early vitamin D supplementation on the immune function of premature infants.Methods:A total of 150 premature infants admitted to Hebei Cangzhou Hospital of Integrated Traditional Chinese and Western Medicine from January 2022 to March 2023 were enrolled perspectively, they were divided into the intervention group (75 cases) and the control group (75 cases) by the random number table method. The control group received formula milk intervention, and the intervention group received early vitamin D supplementation treatment on the basis of the control group. The course of treatment was 14 d. The levels of serum 25-hydroxyvitamin D [25- (OH) D], immunoglobulin (Ig), T cell subsets, complement C3, C4, and serum interleukin (IL)-1β and IL-10 were compared between the two groups before and after intervention.Results:The level of serum 25- (OH) D in the intervention group at 14 d after intervention was higher than that in the control group, the level of IL-1β was lower than that in the control group: (30.13 ± 6.00) nmol/L vs. (26.84 ± 5.79) nmol/L, (0.54 ± 0.20) ng/L vs. (0.65 ± 0.23) ng/L, there were statistical differences ( P<0.05). The levels of CD 3+, CD 4+, complement C3, C4, and IL-10 in the intervention group were higher than those in the control group at 14 d after intervention: 0.692 ± 0.043 vs. 0.632 ± 0.038, 0.400 ± 0.027 vs. 0.369 ± 0.026, (0.98 ± 0.26) g/L vs. (0.84 ± 0.24) g/L, (0.20 ± 0.05) g/L vs. (0.16 ± 0.04) g/L, (13.82 ± 3.64) ng/L vs. (11.36 ± 2.93) ng/L, there were statistical differences ( P<0.05). There were no statistically significant differences in the levels of IgA, IgM and IgG between the two groups before and after intervention ( P>0.05). Conclusions:Early vitamin D supplementation can significantly improve T cell subsets and regulate IL-1β/IL-10 levels in premature infants.

Objective:To investigate the clinical effectiveness of vitamin D combined with conventional anti-infective therapy and formula feeding in the treatment of preterm infants with infectious diseases.Methods:A total of 150 premature infants with infectious diseases treated in Hebei Cangzhou Hospital of Integrated Traditional Chinese and Western Medicine from January to December 2022 were prospectively selected as the study objects, and divided into the control group and the study group according to the admission sequence number, with 75 cases in each group. The control group was treated with routine anti-infection regimen and formula feeding, and the study group was combined with early vitamin D supplementation on the basis of the control group. Both groups were treated continuously for 4 weeks. Serum prealbumin (pre-Alb), 25-hydroxyvitamin D[25-(OH)D], immune indexes and inflammatory response indexes were compared between the two groups before and after treatment, and neonatal complications and adverse reactions were compared between the two groups.Results:After treatment, the levels of serum 25-(OH)D and pre-Alb in the study group were higher than those in the control group: (37.58 ± 4.02) nmol/L vs. (27.20 ± 3.75) nmol/L, (141.27 ± 16.79) mg/L vs. (132.83 ± 16.36) mg/L, there were statistical differences ( P<0.05). After treatment, the levels of serum complement C3, C4, immunoglobulin (Ig) M and IgG in the study group were higher than those in the control group : (0.92 ± 0.15) g/L vs. (0.77 ± 0.19) g/L, (0.18 ± 0.05) g/L vs. (0.15 ± 0.04) g/L, (0.24 ± 0.04) g/L vs. (0.22 ± 0.05) g/L, (8.07 ± 1.05) g/L vs. (7.68 ± 1.13) g/L, there were statistical differences ( P<0.05). After treatment, the serum levels of interleukin-2 (IL) in the study group was higher than that in the control group, while the levels of IL-4, amyloid A (SAA), soluble human tumor necrosis factor receptor 1 (sTNFR-1) and Toll-like receptor 4 (TLR4) in the study group were lower than those in the control group: (4.61 ± 1.14) pg/L vs. (3.81 ± 0.91) pg/L, (20.53 ± 2.61) pg/L vs. (23.97 ± 3.12) pg/L, (5.56 ± 1.78) mg/L vs. (7.24 ± 1.93) mg/L, (4.16 ± 1.27) mg/L vs. (6.08 ± 1.54) mg/L, (75.21 ± 7.39) mg/L vs. (81.42 ± 8.17) mg/L, there were statistical differences ( P<0.05). The incidence rates of neonatal pneumonia, necrotizing enterocolitis (NEC) and metabolic bone disease in the study group were lower than those in the control group: 1.33%(1/75) vs. 10.67%(8/75), 1.33%(1/75) vs. 10.67%(8/75), 0 vs. 9.33%(7/75), there were statistical differences ( P<0.05). Conclusions:Vitamin D supplementation can effectively maintain the nutritional status of premature infants with infectious diseases and improve the immune system function, regulate inflammation and reduce complications.

Objective:To analyze the attributable burden of active smoking on the deaths of cancer in inhabitants aged 30 years and above in Zhejiang Province.Methods:Comparative risk assessment approach in the Global Burden of Disease Study was used with the data from Zhejiang Adult Tobacco Surveillance System and Death Monitoring Surveillance System in 2020, and population attributable fraction (PAF), years of life lost (YLL), work of potential years of life lost (WPYLL) attributed to smoking on the deaths of cancer in inhabitants aged 30 years and above in Zhejiang Province were calculated with a linear regression model.Results:In 2020, there were 81 536 cancer deaths aged 30 years and above in the surveillance areas of Zhejiang Province, of which 24 518 were attributed to active smoking (PAF: 30.07%, attributable mortality rate: 55.04/100 000). The YLL was 553 078 person-years, with a standardized YLL rate of 12.40‰, and the WPYLL was 56 606 person-years. Among various cancer types, laryngeal cancer had the highest smoking-attributable PAF (44.75%), while lung cancer accounted for the most significant number of attributable deaths and life loss, with an age-standardized YLL rate of 4.65‰.Conclusions:Active smoking is a significant risk factor for cancer mortality in Zhejiang Province, with lung cancer posing the most significant disease burden. It is urgent to advance tobacco control legislation, strengthen targeted interventions, and promote early cancer screening to reduce the disease burden associated with smoking-related cancers effectively.

Objective To investigate the protective effect of Gynostemma pentaphyllum on memory of individuals rapidly ascending to high altitudes.Methods Twenty-one healthy subjects were randomly divided into a G.pentaphyllum food group(n=12)and a control group(n=9).The first group consumed G.pentaphyllum food for seven consecutive days while the control group received placebos.Both groups ascended from the plains to an altitude of 3600 m.Memory function was assessed using the matching memory and sequential memory tests of a cognitive evaluation system on day 1 and day 7 on the plains,and at 24 and 48 h after ascending to the high altitude.Scores of acute mountain sickness symptoms were also recorded.Results After 24 h of stay at the high altitude,the score of headache of the G.pentaphyllum food group was significantly lower than that of the control group(P＜0.05).Cognitive test results showed that the matching memory accuracy and sequential memory accuracy of the control group at 24 and 48 h were significantly lower than those on the plains(P＜0.05).In contrast,the G.pentaphyllum food group performed significantly better than the control group in these metrics(P＜0.05).Conclusion Regular consumption of G.pentaphyllum food can effectively alleviate headache symptoms in individuals rapidly ascending to high altitudes and mitigate the decline in working memory,short-term memory,and memory spans caused by acute hypoxic exposure.

Objective To assess the comprehensive effects of transcranial direct current stimulation(tDCS)on physical fitness in healthy athletes and non-athletes.Methods Two researchers independently retrieved PubMed,Embase,Web of Science,Scopus,the Cochrane Library,CNKI,Wanfang,and VIP databases,and collected experimental literature on the effects of tDCS on physical fitness from the database establishment to March 6,2025.Reviewer Manager 5.4 software and Stata 18.0 software were used for Meta-analysis.Results Data from 40 studies involving 778 subjects was included in the Meta-analysis that revealed that tDCS significantly improved the physical fitness of subjects(SMD=0.15).Specifically,anodal tDCS targeting the M1 area(SMD=0.17),at the current of 1.5 mA or 2 mA(SMD=0.64;SMD=0.13),maintained for 20 minutes(SMD=0.19),and with a 35 cm2 electrode patch(SMD=0.31)resulted in significant improvements in maximum strength(SMD=0.32),explosive force(SMD=0.27),muscle endurance(SMD=0.40),cardiopulmonary endurance(SMD=0.51),and static balance(SMD=0.34)in athletes(SMD=0.25)and non-athletes alike(SMD=0.13).However,there was no significant effect on the moving speed and dynamic balance.Conclusion tDCS can effectively improve maximum strength,explosive power,muscle endurance,cardiopulmonary endurance,and static balance in healthy athletes and non-athletes.

Objective:To investigate the clinical features and multi-slice spiral computed tomography(CT)imaging features of acute appendicitis in soldiers who have been living in plateau for a long time.Methods:The clinical features and imaging data of 56 cases of acute appendicitis in soldiers who have been living in plateau for a long time confirmed by surgery from February 2022 to August 2024 were retrospectively analyzed.Results:In 56 cases with acute appendicitis in soldiers who have been living in plateau for a long time,the appendectomy position results showed:anterior ileum 4 cases(7.14％),lower ileum 10 cases(17.86％),posterior cecum 16 cases(28.57％),lower cecum 9 cases(16.07％),lateral cecum 2 cases(3.58％),posterior ileum 6 cases(10.71％),high(subhepatic)9 cases(16.07％),and left lower abdominal 0 cases,retroperitoneal appendicitis 0 cases,which was suggested that the anatomical position variation of appendicitis in soldiers with acute appendicitis who have been living at high altitude for a long time was relatively large.The direct manifestations of multi-slice spiral CT showed:appendectomy enlarged diameter＞6 mm in 49 cases(87.50％),appendicular wall thickening＞2 mm in 42 cases(75.00％),ppendiceal dilation lumen and effusion in 29 cases(51.79％),appendix indistinctness in 3 cases(5.36％),lppendix fecalith:27 cases(48.21％),gas in the appendix in 16 cases(28.57％).Indirect findings of multi-slice spiral CT showed that,periappendiceal exudation with shadow in 32 cases(57.14％),appendiceal cellulitis with peripheral abscess in 9 cases(16.07％),peritonitis and ascites in 13 cases(23.21％),ileocecal intestinal wall thickening in 22 cases(39.29％),mesenteric lymph node enlargement in 16 cases(28.57％),reflexive intestinal stasis in ileocecal region was observed in 19 cases(33.93％).Conclusion:In the officers and soldiers with acute appendicitis who lived at high altitude for a long time,multi-slice spiral CT showed the direct manifestations of appendiceal thickening,tube wall thickening,lumen dilatation,fluid accumulation,etc.,and the indirect manifestations were periappendiceal exudation with shadow,appendiceal cellulitis with peripheral abscess,ileocecal intestinal wall thickening,reflexes of small intestine and mesenteric lymph node enlargement.Multi-slice spiral CT has the advantages of clear and intuitive,high safety,high resolution and simple operation in the diagnosis of acute appendicitis.

Objective:To explore the coordinated development status of the medical service supply-economy-society trinity systems in Zhejiang Common Prosperity Demonstration Zone,and to offer references for formulating policies conducive to the efficient and coordinated development of these three systems.Methods:Based on the panel data from 2013 to 2022,this research was conducted on the 11 prefectural-level cities in Zhejiang Province.Firstly,an evaluation index system for the three systems was established,and the entropy method was employed to determine the weights of each index and calculate the comprehensive evaluation index.Secondly,a triangular model was introduced to delineate the relative relationships among the three systems,and the coupling coordination degree model was utilized to disclose the coordination degree of the three systems.Finally,the spatial autocorrelation analysis method was applied to investigate the spatial autocorrelation of the coupling coordination degree of the three systems.Results:(1)On the whole,the development status of the three systems has improved over time,yet the comprehensive development level remains to be improved.(2)Overall,each prefectural-level city has transited from a medical service supply-society-dominated development to a balanced and coordinated development of the medical service supply-economy-society trinity systems.The coupling coordination degree of the three systems has risen from 0.468(on the verge of imbalance)in 2013 to 0.609(primary coordination)in 2022,presenting an upward trend in general.However,the coordination level remains to be improved and there exist imbalances among regions.(3)The coupling coordination degree of the three systems in Zhejiang Province exhibits a significant positive spatial correlation,and the spatial distribution characteristics are relatively stable. Conclusion:The coupling coordination degree of the medical service supply-economy-society trinity systems in Zhejiang Province awaits further enhancement. At the level of Zhejiang Province,favorable policy support should be provided,the layout of medical resources should be rationally planned,and high-quality economic and social development should be promoted. Each prefectural-level city should formulate strategies for medical service supply,economic,and social development in accordance with its own development level and local conditions,strengthen inter-city linkage and cooperation,and thereby elevate the coordinated development level of the three systems.

Objective To propose a brain electrical phase prediction method based on long short-term memory network(LSTM)to improve the accuracy and robustness of phase synchronization prediction in transcranial magnetic stimulation(TMS).Methods First,an LSTM consisting of an input layer,an LSTM layer,an ReLU activation layer,a fully connected layer and a regression layer was constructed to capture the EEG signal features through the synergistic action of input gates,forgetting gates and output gates.Second,eye-open resting-state EEG data from 30 healthy subjects were trained using the LSTM to obtain a predictive model for EEG signal and EEG phase prediction.Finally,the LSTM method and the traditional autoregressive(AR)method were compared in terms of the phase prediction errors at the overall and individual levels and the prediction performance for peaks and troughs.A regression model was used to explore the relationships between instantaneous EEG amplitude,signal-to-noise ratio and phase prediction error with the LSTM method.Results The LSTM method achieved a total phase prediction error of 0.04°±5.69°,which was lower than that of the traditional AR method(-3.36°±51.13°).For each subject,the LSTM method demonstrated superior phase prediction accuracy compared to the traditional AR method(P＜0.001).The accuracy for predicting peaks(troughs)by the LSTM method(about 89％)was higher than that by the traditional AR method(about 10％).Unlike the traditional AR method,the LSTM method didnot result in linear relationships between instantaneous EEG amplitude,signal-to-noise ratio and phase prediction error,with Pvalues being 0.58 and 0.18,respectively.Conclusion The LSTM-based brain electrical phase prediction method shows high accuracy and robustness when used for EEG phase-synchronized TMS.[Chinese Medical Equipment Journal,2025,46(3):1-8]