Electromagnetic fields can regulate the fundamental biological processes involved in bone remodeling. As a non-invasive physical therapy, electromagnetic fields with specific parameters have demonstrated therapeutic effects on bone remodeling diseases, such as fractures and osteoporosis. Electromagnetic fields can be generated by the movement of charged particles or induced by varying currents. Based on whether the strength and direction of the electric field change over time, electromagnetic fields can be classified into static and time-varying fields. The treatment of bone remodeling diseases with static magnetic fields primarily focuses on fractures, often using magnetic splints to immobilize the fracture site while studying the effects of static magnetic fields on bone healing. However, there has been relatively little research on the prevention and treatment of osteoporosis using static magnetic fields. Pulsed electromagnetic fields, a type of time-varying field, have been widely used in clinical studies for treating fractures, osteoporosis, and non-union. However, current clinical applications are limited to low-frequency, and research on the relationship between frequency and biological effects remains insufficient. We believe that different types of electromagnetic fields acting on bone can induce various “secondary physical quantities”, such as magnetism, force, electricity, acoustics, and thermal energy, which can stimulate bone cells either individually or simultaneously. Bone cells possess specific electromagnetic properties, and in a static magnetic field, the presence of a magnetic field gradient can exert a certain magnetism on the bone tissue, leading to observable effects. In a time-varying magnetic field, the charged particles within the bone experience varying Lorentz forces, causing vibrations and generating acoustic effects. Additionally, as the frequency of the time-varying field increases, induced currents or potentials can be generated within the bone, leading to electrical effects. When the frequency and power exceed a certain threshold, electromagnetic energy can be converted into thermal energy, producing thermal effects. In summary, external electromagnetic fields with different characteristics can generate multiple physical quantities within biological tissues, such as magnetic, electric, mechanical, acoustic, and thermal effects. These physical quantities may also interact and couple with each other, stimulating the biological tissues in a combined or composite manner, thereby producing biological effects. This understanding is key to elucidating the electromagnetic mechanisms of how electromagnetic fields influence biological tissues. In the study of electromagnetic fields for bone remodeling diseases, attention should be paid to the biological effects of bone remodeling under different electromagnetic wave characteristics. This includes exploring innovative electromagnetic source technologies applicable to bone remodeling, identifying safe and effective electromagnetic field parameters, and combining basic research with technological invention to develop scientifically grounded, advanced key technologies for innovative electromagnetic treatment devices targeting bone remodeling diseases. In conclusion, electromagnetic fields and multiple physical factors have the potential to prevent and treat bone remodeling diseases, and have significant application prospects.

Objective:To evaluate the effects and underlying mechanisms of preoperative intestinal microbiota modulation on the recovery of prolonged postoperative ileus(PPOI)in gastric cancer patients with sarcopenia Methods:Skeletal muscle mass(SMM)was assessed using bioelectrical impedance analysis(BIA),and the skeletal muscle index(SMI)was calculated.A total of 156 gastric cancer patients with sarcopenia who underwent surgery at the Department of Gastrointestinal Surgery,Liyang People's Hospital,from January 2022 to December 2024 were randomly assigned to either the control group or the experimental group.The control group received conventional prehabilitation interventions,including nutritional support,respiratory function training,and physical exercise.The experimental group received probiotic-based intestinal microbiota modulation in addition to conventional prehabilitation interventions.Postoperative recovery indicators,including time to first flatus,incidence of postoperative complications,length of hospital stay,and hospitalization costs,were compared between the two groups.Results:Among the 156 sarcopenic gastric cancer patients,121 were male,and 35 were female.Statistically significant differences were observed between the two groups in terms of time to first flatus,incidence of postoperative complications,and length of hospital stay(P<0.05).Postoperative complications occurred in 38 patients(24.3%),with 10 cases(6.4%)in the experimental group and 28 cases(17.9%)in the control group.The time to first flatus in the experimental group was significantly shorter than in the control group(48.0 hours vs 72.0 hours,P<0.001).Conclusion:Preoperative intestinal microbiota modulation significantly reduces the incidence of PPOI and postoperative complications in gastric cancer patients with low SMI,thereby promoting postoperative gastrointestinal function recovery.

Hepatocellular carcinoma(HCC),which is essentially primary liver cancer,is closely related to CD8+T cell immune infiltration and immune suppression.We constructed a CD8+T cells related risk score model to pre-dict the prognosis of HCC patients and provided therapeutic guidance based on the risk score.Using integrated bulk RNA sequencing(RNA-seq)and single-cell RNA sequencing(scRNA-seq)datasets,we identified stable CD8+T cell signatures.Based on these signatures,a 3-gene risk score model,comprised of KLRB1,RGS2,and TN-FRSF1B was constructed.The risk score model was well validated through an independent external validation co-hort.We divided patients into high-risk and low-risk groups according to the risk score and compared the differ-ences in immune microenvironment between these two groups.Compared with low-risk patients,high-risk patients have higher M2-type macrophage content(P＜0.0001)and lower CD8+T cells infiltration(P＜0.0001).High-risk patients predict worse response to immunotherapy treatment than low-risk patients(P＜0.01).Drug sensitivity a-nalysis shows that PI3K-β inhibitor AZD6482 and TGFβRII inhibitor SB505124 may be suitable therapies for high-risk patients,while the IGF-1R inhibitor BMS-754807 or the novel pyrimidine-based anti-tumor metabolic drug Gemcitabine could be potential therapeutic choices for low-risk patients.Moreover,expression of these 3-gene mod-el was verified by immunohistochemistry.In summary,the establishment and validation of a CD8+T cell-derived risk model can more accurately predict the prognosis of HCC patients and guide the construction of personalized treatment plans.

AIM To investigate the protective effects of verbascoside on D-galactose-induced liver injury in mice and its underlying mechanisms.METHODS C57BL/6J mice were randomly assigned to the normal group,the model group,the vitamin E group(100 mg/kg),and the low-dose and high-dose verbascoside groups(40,80 mg/kg),with 10 mice in each group.Simultaneous administration of medicine and subcutaneous injection of D-galactose(600 mg/kg)went on among the groups except the normal group for 8 weeks.Serum ALT,AST,ALP activities,along with TBil levels were measured using biochemical kits.Hepatic GSH,MDA concentrations,as well as SOD and GSH-Px activities were quantified.Liver pathological morphology was evaluated by HE staining,while hepatic fibrosis area was assessed using Sirius red staining.Western blot analysis determined hepatic expression of IL-6,IL-1β,TNF-ɑ,TLR4,NF-κB p65,IκBɑ and p-IKBɑ proteins.RESULTS Compared to the model group,the groups treated with vitamin E or verbascoside demonstrated significantly reduced body weight(P＜0.05,P＜0.01);increased hepatic index(P＜0.05,P＜0.01);decreased serum activities of ALT,AST and ALP alongsided reduced TBil levels(P＜0.05,P＜0.01);attenuated pathological damage of liver tissue and fibrosis severity;reduced hepatic MDA level(P＜0.05,P＜0.01);and elevated GSH level with enhanced SOD and GSH-Px activities(P＜0.05,P＜0.01).Furthermore,the high-dose verbascoside group showed significantly decreased hepatic expressions of IL-6,IL-1 β,TNF-ɑ,TLR4,NF-κB p65,and p-IKBɑ/IKBɑ proteins(P＜0.05,P＜0.01).CONCLUSION Verbascoside improves D-galactose-induced liver injury through its antioxidant activity,anti-inflammatory effects,and suppression of the TLR4/NF-κB signaling pathway.

AIM To investigate the ameliorative effects of Compound Fufangteng Mixture(CFM)on cyclophosphamide(CTX)-induced immunosuppression in mice.METHODS Forty-eight male C57BL/6J mice were randomly divided into the blank control group,the model group,the levamisole hydrochloride group(40 mg/kg)and the low-dose,medium-dose and high-dose CFM groups(3.75,7.5,10 g/kg),with 8 mice in each group,and given respective intervention orally once daily for 14 days.On the 5th to 7th day of administration,with the blank control group given normal saline intraperitoneally,the other groups underwent intraperitoneal CTX injections(80 mg/kg).24 hours after the last administration,organ indices of thymus and spleen were calculated;splenic histopathological alterations were assessed by HE staining;serum levels of IL-2,IL-6 and IgG were quantified using ELISA;splenic CD4+,CD8+T lymphocytes,alongside CD86+and CD206+macrophages populations were analyzed by flow cytometry;and splenic expression of CD4,CD8 and F4/80 was evaluated by immunohistochemical staining.RESULTS In CTX-treated mice,CFM administration mitigated body weight loss;enhanced thymus weight and thymic index;ameliorated splenic immune cell populations,elevated serum levels of cytokines IL-2,IL-6 and IgG in serum;and upregulated splenic levels of CD45+CD3+T lymphocytes and F4/80+CD11b+macrophages,alongside increasing the expression of CD4,CD8 and F4/80 surface markers.CONCLUSION CFM alleviates CTX-induced immunosuppression state in mice by modulating immune cells,restoring immune function and enhancing anti-inflammatory and tissue repair capabilities.

Objective To investigate the short-term efficacy of 3D-printed artificial vertebral body combined with PEEK-Cage implantation in anterior cervical surgery for ossification of the posterior longitudinal ligament of the cervical spine(OPLL).Methods The clinical data of 15 patients with OPLL who underwent anterior cervical surgery with 3D-printed artificial vertebral body and PEEK-Cage implantation in the Fifth Department of Orthopaedics,Liaoning Provincial People's Hospital from September 2022 to June 2023 was retrospectively analyzed.The surgical time,intraoperative blood loss,postoperative drainage volume,bed rest time,hospital stay,and surgery-related complications of patients were analyzed.The Japanese Orthopaedic Association(JOA)score and visual analogue scale(VAS)score of patients were counted before surgery,3 days after surgery,1 month after surgery and 6 months after surgery.The changes of Cobb angle of fusion segment of patients were recorded before surgery,3 days after surgery,1 month after surgery and 6 months after surgery.Results All 15 patients successfully completed the surgery.The surgical time was 130 to 160 minutes,with an average of(148.68±10.04)minutes.The intraoperative blood loss was 50 to 200 mL,with an average of(130.0±18.8)mL.The postoperative drainage volume was 220 to 980 mL,with an average of(270.0±24.6)mL.The bed rest time was 3 to 11 days,with an average of(3.6±2.8)days.The hospital stay was 7 to 16 days,with an average of(8.2±2.6)days.All patients'incisions healed in the first stage,and no infection occurred.One patient suffered from dural sac tear during surgery;4 patients had dysphagia after surgery;1 patient suffered from muscle weakness of one limb after surgery;Hematoma formed in the incision of cervical spine in 1 patient 3 days after surgery.At 3 days,1 month,and 6 months after surgery,the Cobb angle,VAS score and JOA score of 3 patients with myeloid symptoms and upper limb root pain were significantly improved compared with those before surgery(P<0.05),and the Cobb angle and JOA score of 12 patients with only myeloid symptoms were significantly improved compared with those before surgery(P<0.05).Conclusion 3D-printed artificial vertebral body combined with PEEK-Cage implantation in anterior cervical surgery is an effective method for the treatment of OPLL,which can significantly relieve patients'pain and improve their dysfunction in a short time,with good stability and fusion effect.

Objective To investigate the short-term efficacy of 3D-printed artificial vertebral body combined with PEEK-Cage implantation in anterior cervical surgery for ossification of the posterior longitudinal ligament of the cervical spine(OPLL).Methods The clinical data of 15 patients with OPLL who underwent anterior cervical surgery with 3D-printed artificial vertebral body and PEEK-Cage implantation in the Fifth Department of Orthopaedics,Liaoning Provincial People's Hospital from September 2022 to June 2023 was retrospectively analyzed.The surgical time,intraoperative blood loss,postoperative drainage volume,bed rest time,hospital stay,and surgery-related complications of patients were analyzed.The Japanese Orthopaedic Association(JOA)score and visual analogue scale(VAS)score of patients were counted before surgery,3 days after surgery,1 month after surgery and 6 months after surgery.The changes of Cobb angle of fusion segment of patients were recorded before surgery,3 days after surgery,1 month after surgery and 6 months after surgery.Results All 15 patients successfully completed the surgery.The surgical time was 130 to 160 minutes,with an average of(148.68±10.04)minutes.The intraoperative blood loss was 50 to 200 mL,with an average of(130.0±18.8)mL.The postoperative drainage volume was 220 to 980 mL,with an average of(270.0±24.6)mL.The bed rest time was 3 to 11 days,with an average of(3.6±2.8)days.The hospital stay was 7 to 16 days,with an average of(8.2±2.6)days.All patients'incisions healed in the first stage,and no infection occurred.One patient suffered from dural sac tear during surgery;4 patients had dysphagia after surgery;1 patient suffered from muscle weakness of one limb after surgery;Hematoma formed in the incision of cervical spine in 1 patient 3 days after surgery.At 3 days,1 month,and 6 months after surgery,the Cobb angle,VAS score and JOA score of 3 patients with myeloid symptoms and upper limb root pain were significantly improved compared with those before surgery(P<0.05),and the Cobb angle and JOA score of 12 patients with only myeloid symptoms were significantly improved compared with those before surgery(P<0.05).Conclusion 3D-printed artificial vertebral body combined with PEEK-Cage implantation in anterior cervical surgery is an effective method for the treatment of OPLL,which can significantly relieve patients'pain and improve their dysfunction in a short time,with good stability and fusion effect.

Objective:To investigate the efficacy and safety of transurethral water vapor thermal therapy(WVTT)using the Rezūm system for benign prostatic hyperplasia(BPH)in the real world.Methods:A total of 181 patients with BPH were recruited from the Second Affiliated Hospital of Nanjing Medical University from August 2022 to December 2023,of whom 173 patients were treated with WVTT using the Rezūm system,while 8 patients were treated with WVTT combined with TURP.They were followed up at 1,3,and 6 months postoperatively to assess changes in the IPSS,QoL,Qmax,IIEF-5,and the occurrence of any complications.Results:All 181 surgeries in this group were successfully completed.The operation time of the Rezūm system was(4.6±1.4)mi-nutes.The postoperative indwelling catheterization time was(8.0±2.1)days.With a follow-up of at least 6 months,there was a significant decrease in PV,IPSS and QoL,and a remarkable increase had been found in Qmax as well(P＜0.05).There was no sig-nificant difference in IIEF-5 before and after the operation(P＞0.05).In this groups of patients,postoperative complications mainly included 95 cases(52.5％)of gross hematuria,6 cases(3.3％)of retrograde ejaculation,5 cases(2.8％)of urethral stricture,4 cases(2.2％)of prostatitis,and 10 cases(5.5％)of urinary tract infection.Four cases(2.2％)underwent surgical retreatment for BPH after surgery.Conclusion:In the real world,the use of Rezūm thermal steam ablation system for the treatment of BPH has sat-isfactory short-term effect,short surgical time,and significant improvement in IPSS,QoL,Qmax,which does not adversely affect sexu-al function.

Objective To propose a low-dose CT image denoising method based on an improved Corediff model to recover the detailed features of the image and enhance the image quality.Methods An RS-Corediff model was established by modifying the key component U-Net network of the Corediff model.Firstly,the residual module was introduced in the network input stage for feature extraction;secondly,a new downsampling module was designed in the U-Net network encoder,which learned the semantic information of the feature map by convolution and maintained the learning state during the downsampling process so as to fully extract the image features;thirdly,the feature splicing processing was used to further enhance the learning effect during the upsampling process of the U-Net network decoder;finally,the convolutional kernel size was modified to adjust the sensory field during the convolutional process of the whole U-Net network structure so as to obtain rich features.The RS-Corediff model was compared with the residual encoder-decoder convolutional neural network(RED-CNN)model and the Corediff model on the public dataset AAPM 2016 in order to verify its effectiveness for low-dose CT image denoising.Results The RS-Corediff model gained advantages over the RED-CNN and Corediff models with a peak signal-to-noise ratio(PSNR)of 41.269 8,structural similarity(SSIM)of 0.953 4 and root mean square error(RMSE)of 17.568 7.Conclusion The proposed method effectively preserves the texture and details of low-dose CT images during the denoising process to improve the overall quality of the images.[Chinese Medical Equipment Journal,2025,46(5):9-13]

Objective This study aims to investigate the epidemiological characteristics of mental disorders in a rural town of Huazhou City,Guangdong Province,and explore their association with the rural revitalization strategy,so as to provide evidence for policy formulation.Methods A combination of questionnaire surveys and in-depth interviews was used to collect in-formation on the demographic characteristics,disease status,economic conditions,and policy awareness of registered mental dis-order patients in the town.Semi-structured interviews were also conducted with local doctors and village committee members.Da-ta were analyzed using descriptive statistics and logistic regression models to assess the impact of awareness of rural revitalization policies on patients'income.Results The average age of the study subjects was 47.71 years,with an average disease duration of 18.38 years.A total of 86.36％of patients had a family history of mental disorders.After onset,42.11％of patients had an annual income≥￥ 10 000,which was an increase compared to pre-illness levels,but 60.75％had completely lost their ability to work.Awareness of rural revitalization policies was low(only 18.29％were fully aware),but policy awareness was significant-ly associated with increased patient income(OR=18.03,P＜0.001).Additionally,medical expenditures were significantly higher among female patients than male patients(P＜0.001).Conclusion In a town in Huazhou City,Guangdong Province,60.75％of mental disorder patients have completely lost their ability to work,while 42.11％have an annual income exceeding ￥ 10,000.Income is positively correlated with policy awareness(OR=18.03).It is recommended to strengthen policy promo-tion,optimize the allocation of medical resources,and develop specialized assistance programs to promote the coordinated devel-opment of mental health and rural revitalization.