1.External review of the recommendations of the Guidelines for Evidence-based Use of Biological Agents for the Clinical Treatment of Osteoporosis: a cross-sectional survey
Lingling YU ; Shuang LIU ; Zaiwei SONG ; Qiusha YI ; Yu ZHANG ; Liyan MIAO ; Zhenlin ZHANG ; Chunli SONG ; Yaolong CHEN ; Lingli ZHANG ; Rongsheng ZHAO
China Pharmacy 2025;36(9):1025-1029
OBJECTIVE To assess the scientific rigor, clarity and feasibility of the recommendations of the Guidelines for Evidence-based Use of Biological Agents for the Clinical Treatment of Osteoporosis (hereinafter referred to as the Guideline) through external review, in order to further revise and improve the Guideline recommendations. METHODS This study employed a cross-sectional survey research design, a convenience sampling method was adopted to select frontline medical workers in the field of osteoporosis (including clinical doctors, clinical pharmacists, and nurses) as well as patients or their family members. External review was conducted through a combination of closed-ended and open-ended electronic questionnaires to get feedback from them on the appreciation,clarity and feasibility of the 32 preliminary recommendations in the Guideline. RESULTS A total of 90 external review subjects from 15 hospitals were collected, including 45 clinical doctors, 15 clinical pharmacists, 15 nurses and 15 patients or their family members. The overall appreciation degree of recommendations was 99.38%, the overall clarity degree of recommendations was 98.92%, and the overall feasibility degree of recommendations was 99.65%. At the same time, 111 subjective suggestions were collected, which provided an important reference for the further improvement of the Guideline recommendations. Based on the above feedback, the Guideline steering committee and core expert group revised the wording of 12 draft recommendations without deletion, and finally determined 32 recommendations. CONCLUSIONS The external review provides an important basis for the final formation of the Guideline, further improves the scientific rigor, clarity and feasibility of the recommendations, and ensures the standardization, practicality and implementability of the Guideline.
2.Therapeutic mechanism of hederagenin, an active component in Guizhi Fuling Pellets, against cervical cancer in nude mice.
Yinfu ZHU ; Yiran LI ; Yi WANG ; Yinger HUANG ; Kunxiang GONG ; Wenbo HAO ; Lingling SUN
Journal of Southern Medical University 2025;45(7):1423-1433
OBJECTIVES:
To explore the therapeutic mechanism of Guizhi Fuling (GZFL) Pellets against cervical cancer.
METHODS:
Publicly available databases were used to identify the targets of GZFL Pellets and cervical cancer to construct the protein-protein interaction (PPI) network, followed by GO biological process and KEGG pathway enrichment analysis of the hub genes. The "Traditional Chinese Medicine-Active Ingredients-Targets-Pathways" network for GZFL Pellets in cervical cancer treatment was generated using Cytoscape v10.0.0, and molecular docking of the drug and potential targets was performed to predict the specific targets of active components in Guizhi Fuling Pellets. The inhibitory effects of hederagenin, an active ingredient in GZFL Pellets, was tested in cultured cervical cancer cells and in nude mice bearing cervical cancer xenografts.
RESULTS:
GZFL Pellets contain 338 active components targeting 247 action sites. A total of 10127 cervical cancer-related targets were obtained, and among them 195 were identified as potential therapeutic targets of GZFL Pellets for cervical cancer treatment, including the key targets of GABRA1, PTK2, JAK2, HTR3A, GSR, and IL-17. Molecular docking study showed low binding energies of the active components such as hederagenin, campesterol, and stigmasterol for protein-molecule interaction. GO enrichment analysis suggested that GZFL Pellets inhibited cervical cancer primarily by regulating responses to steroid hormones, oxidative stress, and lipopolysaccharides. Among the active components of GZFL Pellets, hederagenin was found to inhibit cervical cancer cells in vitro and significantly reduced STAT3 phosphorylation level in the cancer cells. In nude mice bearing cervical cancer xenografts, hederagenin effectively inhibited tumor growth rate without causing obvious adverse effects.
CONCLUSIONS
GZFL Pellets inhibit cervical cancer cell growth through its multiple active components that target different pathways. Among these components, hederagenin inhibits tumor cell growth possibly by directly binding to JAK2 protein to inhibit STAT3 phosphorylation.
Female
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Animals
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Uterine Cervical Neoplasms/pathology*
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Mice, Nude
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Humans
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Mice
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Oleanolic Acid/therapeutic use*
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Drugs, Chinese Herbal/therapeutic use*
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Molecular Docking Simulation
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Xenograft Model Antitumor Assays
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Cell Line, Tumor
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STAT3 Transcription Factor/metabolism*
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Protein Interaction Maps
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Janus Kinase 2/metabolism*
3.The effect of NLRP3 on airway epithelial-mesenchymal transition by regulating Th17/Treg imbalance in asthmatic mice
Beibei CHENG ; Guoran PENG ; Lingling ZHOU ; Feiying WANG ; Silin XIE ; Jian YI ; Aiguo DAI
Immunological Journal 2024;40(5):440-445
This study was designed to explore the correlation between alterations in NLRP3 levels and Th17/Treg imbalance in asthmatic mice undergoing epithelial-mesenchymal transition(EMT).A murine model of asthma was established by intraperitoneal injection combined with nebulization of ovalbumin(OVA).Mice were randomly grouped into asthma model group and normal control group.The airway reactivity was detected with non-invasive lung function instrument.Hematoxylin and Eosin(HE)and Masson's trichrome staining were applied to evaluate the histopathological injury of lung tissue and the extent of lung fibrosis;RT-qPCR was applied to detect EMT-related biomarkers(Snail,E-Cadherin,N-Cadherin),the specific transcription factors of T cell subsets(RoRγt,Foxp3)and NLRP3 in lung tissue of mice;Western blot was used to detect the protein expression of E-cadherin,N-Cadherin and NLRP3 in lung tissue of mice.The Th17 and Treg cell populations in the spleen were enumerated via flow cytometry.Furthermore,the expression levels of NLRP3,IL-17 and IL-10 in bronchoalveolar lavage fluid(BALF)were analyzed by Giemsa staining.Compared with the control group,the asthma model group showed higher level of airway resistance,coupled with an obviously decrease in pulmonary ventilation compliance.Pathological alterations in lung tissue were evident,characterized by thickening of the airway epithelium,airway stenosis,infiltration of inflammatory cells,higher expression levels of N-Cadherin and NLRP3 proteins(P<0.05),lower expression level of E-Cadherin(P<0.001)and higher levels of marker genes(Snail and N-Cadherin)in lung tissue.Furthermore,model mice demonstrated higher level of NLRP3 in BALF(P<0.05),higher level of Th17 in spleen,and higher levels of retinoic acid orphan receptor(ROR)-γt mRNA(P<0.05)and Th17-related cytokines(IL-17)(P<0.01).Concurrently,model mice also showed an obviously decrease in the prevalence of Treg cells,Forkhead box Foxp3 mRNA(P<0.001),and Treg-related cytokine IL-10(P<0.05).The results of the Pearson correlation analysis indicated that the level of NLRP3 mRNA was positively correlated the ratio of RoR γt mRNA,but negatively correlated with Foxp3 mRNA in the lung tissue of asthmatic mice.Additionally,NLRP3 in BALF demonstrated a positive correlation with IL-17 and a negative correlation with IL-10.In conclusion,These findings suggest that NLRP3 may trigger bronchial EMT by exacerbating the immune imbalance of Th17/Treg cells.
4.Construction and preliminary phenotype analysis of mice with Retnlb knockout in colon cells
Feiying WANG ; Lingling ZHOU ; Beibei CHENG ; Jiajing WAN ; Chao ZHANG ; Jian YI ; Lan SONG ; Aiguo DAI
Chinese Journal of Pathophysiology 2024;40(10):1788-1796
AIM:This study utilized CRISPR/Cas9 technology to create Retnlb floxp knock-in mice,followed by the application of the Cre-LoxP recombination system to generate intestinal epithelial-specific Retnlb gene knockout mice(Retnlb-CKO).This model was developed to investigate the pathogenic mechanisms of Retnlb in inflammatory bowel disease.METHODS:Female and male C57BL/6N mice,aged 8 weeks with the Retnlbflox/+genotype,were housed togeth-er for breeding.Offsprings were screened to identify those with the Retnlbflox/flox genotype.These mice were then crossed with Vil1-Cre transgenic mice,which express Cre recombinase specifically in intestinal epithelial cells,resulting in Retnlb-flox/+,Cre+mice.Subsequent crosses between Retnlbflox/+,Cre+mice and Retnlbflox/flox mice produced Retnlbflox/flox,Cre+mice(Retnlb-CKO).Six 8-week-old Retnlbflox/flox,Cre+mice and their littermate Retnlbflox/flox mice were selected for experiments.RT-qPCR and immunohistochemistry were used to assess Retnlb mRNA and protein levels in colonic epithelium.Phenotypic observa-tions included body length,weight,diet,and reproductive capability.Tissue-to-body weight ratios were calculated to ana-lyze growth and development.Intestinal barrier integrity and colonic expression of inflammatory factors were evaluated.RESULTS:The conditional gene knockout mouse model with specific deletion of Retnlb in intestinal epithelial cells was successfully established and validated through genetic identification,mRNA and protein analysis.Compared to Retnlbflox/flox mice,Retnlb-CKO mice exhibited no significant differences in body length,weight,diet,or reproductive capability.There were no differences in the ratios of heart,liver,spleen,lung,kidney,and colon weight to body weight,nor were there morphological differences in various tissues.However,the mRNA expression of tight junction proteins ZO-1,Occlu-din,and Claudin3 in colon tissues of Retnlb-CKO mice was significantly reduced(P<0.01).PAS staining and immunohis-tochemistry revealed a significant decrease in the number of goblet cells and lysozyme-positive cells in the colon tissues of Retnlb-CKO mice(P<0.01).HE staining showed no obvious pathological change in colon tissues of Retnlb-CKO mice.RT-qPCR further demonstrated a significant downregulation of pro-inflammatory factors NLRP3,interleukin-6(IL-6),IL-1β,and tumor necrosis factor-α(TNF-α)in colon tissues(P<0.01),along with significant downregulation of inflamma-tion signaling pathway proteins TLR4,MyD88,and NF-κB(P<0.01).CONCLUSION:A conditional colon epithelial cell Retnlb gene knockout mouse model was successfully constructed and validated.The absence of Retnlb in colon cells led to impaired intestinal barrier function,decreased mRNA expression of pro-inflammatory factors in colon tissue,and downregulation of mRNA expression of inflammatory pathway proteins TLR4,MyD88,and NF-κB.
5.Research progress of fatigue in patients with cirrhosis
Yujuan LIU ; Xiaodan ZHANG ; Ying YI ; Xueyao MA ; Juan MAO ; Yangyang DING ; Lingling DUAN
Chinese Journal of Practical Nursing 2024;40(24):1917-1921
Fatigue is one of the common symptoms in patients with liver cirrhosis, which has a serious impact on the quality of life of patients. This article reviews the influencing factors and intervention strategies of fatigue in patients with cirrhosis, aiming to provide reference for early recognition and intervention of fatigue in patients with cirrhosis.
6.Relationship between serum S100A11,S100A14,CA125 and cytoreductive surgery outcomes in patients with stage Ⅱ B-Ⅳ epithelial ovarian cancer and their predictive value
Hong LU ; Yi YIN ; Lingling LI ; Yong LI
International Journal of Laboratory Medicine 2024;45(19):2372-2376,2381
Objective To investigate the relationship between serum S100 calcium binding protein A(S100A)11,S100A14 and carbohydrate antigen 125(CA125)levels and the outcome of initial cytoreductive surgery in patients with stage Ⅱ B-Ⅳ epithelial ovarian cancer(EOC)and their predictive value.Methods A total of 124 patients with stage Ⅱ B-Ⅳ EOC who underwent initial cytoreductive surgery in the hospital from June 2018 to June 2021 were selected as the EOC group,70 patients with benign ovarian lesions were selected as the case control group,and 70 healthy people who underwent physical examination in the hospital during the same period were selected as the healthy control group.Serum levels of S100A11,S100A14 and CA125 were detected in each group.According to the outcome of cytoreductive surgery,EOC patients were divided in-to satisfactory group(70 cases)and unsatisfactory group(54 cases).The influencing factors of unsatisfactory surgical outcomes in patients with stage Ⅱ B-Ⅳ EOC were analyzed,and the clinical value of serum S100A11,S100A14 and CA125 in predicting unsatisfactory surgical outcomes in patients with stage Ⅱ B-ⅣEOC was evaluated.Results The serum levels of S100A11,S100A14 and CA125 in EOC group were higher than those in case control group and healthy control group(P<0.05).The proportions of American Society of Anesthesiologists(ASA)grade Ⅲ,ascites,International Federation of Gynecology and Obstetrics(FIGO)stage ⅢC-Ⅳ and serum levels of CA125,S100A11 and S100A14 in unsatisfactory group were significantly higher than those in satisfactory group(P<0.05).FIGO stage 111 C-Ⅳ and elevated serum levels of CA125,S100A11 and S100A14 were independent risk factors affecting the unsatisfactory outcome of cytoreductive surgery in patients with EOC(P<0.05).The area under the curve(95%CI)of serum CA125,S100A11,S100A14 and the combination of the three to predict the unsatisfied outcome of EOC patients were 0.727(0.521-0.910),0.747(0.507-0.961),0.755(0.553-0.954)and 0.825(0.743-0.913),respectively.The predictive value of combined detection of CA125,S100A11 and S100A14 in predicting unsatisfactory outcome of cytoreductive surgery was better than that of serum CA125,S100A11 and S100A14 alone.Conclusion The el-evated serum levels of S100A11,S100A14 and CA125 in patients with stage ⅡB-Ⅳ EOC are associated with the unsatisfactory outcome of cytoreductive surgery.The combined detection of serum CA125,S100A11 and S100A14 has a high predictive value for the unsatisfactory outcome of cytoreductive surgery.
7.Clinical study of 980 nm semiconductor laser preablation of urethra mucosa in prostatic tip in small volume benign prostatic hyperplasia laser vaporization
Binbin ZHANG ; Lingling DU ; Xiaolong HE ; Yantao DANG ; Wenshuai YAN ; Jixue GAO ; Yi LI ; Lijun MA ; Hongxiong SONG
International Journal of Surgery 2024;51(11):752-758
Objective:To investigate the effect of 980 nm semiconductor laser preablation of urethra mucosa at the prostatic tip in small volume benign prostatic hyperplasia (BPH).Methods:The case data of 120 patients diagnosed with small volume BPH in the Yan′an University Affiliated Hospital from June 2020 to June 2022 were retrospectively analyzed, and they were divided into improved group and conventional group according to different treatment methods, with 60 cases in each group. Patients in the improved group were treated with 980 nm semiconductor laser preablation of urethra mucosa at the prostatic tip, and patients in the conventional group were treated with 980 nm semiconductor laser vaporization of prostate. The sexual function of the patients was evaluated by the international erectile function index-5(IIEF-5) score, erectile hardness score (EHS) and retrograde ejaculation before surgery and 1, 3, 6, and 12 months after surgery. International prostate symptom scale (IPSS), quality of life (QOL) score, the maximum urine flow rate (Qmax) and postvoid residual urine (PVR) were used to evaluate urinary control function. The incidence of urinary incontinence, bladder neck contracture and other complications were compared between the two groups. Measurement data were expressed as mean±standard deviation ( ± s), and t-test was used for comparison between groups. The count data were expressed as cases and percentage, and Chi-square test was used for comparison between groups. Results:There was no significant difference in PVR, Qmax, IPSS score, QOL score, IIEF-5 score and EHS score between two groups ( P>0.05). In terms of PVR, Qmax, IPSS score, QOL score, IIEF-5 score and EHS score at 1, 3, 6 and 12 months after surgery, all these parameters were significantly improved compared with the preoperative, the differences were statistically significant ( P< 0.05). However, there was no significant difference between the two groups ( P> 0.05). There was no significant difference in IIEF-5 score and EHS score between the two groups during postoperative follow-up and before and after operation ( P> 0.05). The incidence of retrograde ejaculation rate in the improved group was lower than that in the conventional group during the follow-up 1, 3, 6 months after surgery, and the difference was statistically significant ( P<0.05). In the follow-up 1, 3 months after surgery, the incidence of stress urinary incontinence in the improved group was lower than that in the conventional group, the differences were statistically significant ( P< 0.05). At follow-up 6, 12 months after surgery, the rates of stress urinary incontinence were similar between the two groups, and the difference was not statistically significant ( P> 0.05). In the follow-up 12 months after surgery, there were 2 cases (3.33%) of bladder and neck contracture in the improved group, and 8 cases (13.33%) in the conventional group, the difference was statistically significant ( P<0.05). Conclusions:The effect of 980 nm semiconductor laser preablation of urethra mucosa at the prostatic tip in small volume BPH patients is similar to that of conventional vaporization, and the operation time is short. At the same time, the proximal 1 cm tissue of the verticulae and the integrity of the bladder neck are preserved, and the internal and external sphincter of the urethra are protected, thus improving the immediate postoperative urinary control rate and the incidence of retrograde ejaculation in small volume BPH patients.
8.Study on effects and mechanism of Qifu Lizhong Enema Prescription on mechanical barrier function of intestinal mucosa in rats with ulcerative colitis
Wei LI ; Lingling YUAN ; Jiaxin LI ; Pengfei WEI ; Shuangyuan HU ; Yanwei HAO ; Yi ZHANG
International Journal of Traditional Chinese Medicine 2024;46(7):874-880
Objective:To observe the effects of Qifu Lizhong Enema Prescription on ulcerative colitis rats with yang deficiency of spleen and kidney syndrome; To discuss its mechanism.Methods:Totally 70 male SD rats were randomly divided into blank group, model group, mesalazine group, Qifu Lizhong Guanchang Prescription high-, medium- and low-dosage groups; blank group ( n=10), other groups ( n=12). Except for the blank group, the other groups used bitter cold purgative therapy (Dahuang Decoction) by gavage, and combined with trinitrobenzen sulfonic acid (TNBS) +55% ethanol compound method to induce UC rat model. After successful modeling, the blank group and model group were given 1 ml normal saline enema daily, Qifu Lizhong Enema Prescription groups were given Qifu Lizhong Enema Prescription 3.00, 1.50, 0.75 g/kg enema daily, and the mesalazine group was given mesalazine 0.03 g/kg enema daily, once a day for consecutive 14 days. After 14 days, Disease Activity Index (DAI) score was performed, and hematoxylin-eosin staining (HE) was used to observe the pathological tissues of the colon. The expressions of Occludin and adhesion molecules A (JAM-A) protein in colon tissue were detected by immunohistochemistry and Western blot. Results:HE results showed that the mucosal structure was damaged, inflammatory cells were infiltrated, edema and ulcer foci were observed in model group. The mucosal structure of mesalazine group and Qifu Lizhong Enema Prescription groups were intact, and inflammatory infiltration, edema and ulcer of neoepithelial were improved. Compared with model group, the DAI scores of Qifu Lizhong Enema Prescription groups decreased ( P<0.01), the expressions of Occludin and JAM-A in Qifu Lizhong Guanchang Prescription high- and medium-dosage groups significantly increased ( P<0.05). Conclusion:Qifu Lizhong Enema Prescription can significantly relieve the symptoms and pathological morphology of UC rats, and the mechanism of repairing intestinal mucosal barrier may be related to up-regulating the expressions of Occludin and JAM-A proteins.
9.Inhibition of Oxidative Stress of Sciatic Nerve in Diabetic Rats by Tangbikang Granules Regulating AMPK/PGC-1α/SIRT3 Signaling Pathway
Gang LIU ; Yaqi ZHANG ; Lingling QIN ; Chengfei ZHANG ; Qiue ZHANG ; Huizhong BAI ; Yi ZHAO ; Tonghua LIU ; Xiaohong MU
Chinese Journal of Experimental Traditional Medical Formulae 2024;30(6):75-82
ObjectiveTo investigate the effect of Tangbikang granules on oxidative stress of sciatic nerve in diabetic rats by regulating adenylate activated protein kinase/peroxisome proliferator-activated receptor γ coactivator-1α/mitochondrial Sirtuins 3 (AMPK/PGC-1α/SIRT3) signaling pathway. MethodThe spontaneous obesity type 2 diabetes model was established using ZDF rats. After modeling, they were randomly divided into high, medium, and low dose Tangbikang granule groups (2.5, 1.25, 0.625 g·kg-1·d-1) and lipoic acid group (0.026 8 g·kg-1·d-1), and the normal group was set up. The rats were administered continuously for 12 weeks after modeling. The blood glucose of rats was detected before intervention and at 4, 8, 12 weeks after intervention. At the 12th week, motor nerve conduction velocity (MNCV), sensory nerve conduction velocity (SNCV), nerve blood flow velocity, mechanical pain threshold, and thermal pain threshold were detected. The sciatic nerve was taken for hematoxylin-eosin (HE) staining to observe the tissue morphology. The ultrastructure of the sciatic nerve was observed by transmission electron microscope. The expression levels of superoxide dismutase (SOD), malondialdehyde (MDA), interleukin-1β (IL-1β), and tumor necrosis factor-α (TNF-α) in sciatic nerve were determined by enzyme-related immunosorbent assay (ELISA). The mRNA expressions of AMPKα, AMPKβ, PGC-1α, and SIRT3 in sciatic nerve were determined by real-time polymerase chain reaction (Real-time PCR). ResultCompared with the normal group, fasting blood glucose in the model group was increased at each time point (P<0.01). The mechanical pain threshold was decreased (P<0.05), and the incubation time of the hot plate was extended (P<0.01). MNCV, SNCV, and nerve blood flow velocity decreased (P<0.05). The expression level of SOD was decreased (P<0.01). The expression levels of MDA, IL-1β, and TNF-α were increased (P<0.01). The mRNA expression levels of AMPKα, AMPKβ, PGC-1α, and SIRT3 were decreased (P<0.01). The structure of sciatic nerve fibers in the model group was loose, and the arrangement was disordered. The demyelination change was obvious. Compared with the model group, the fasting blood glucose of rats in the high dose Tangbikang granule group was decreased after the intervention of eight weeks and 12 weeks (P<0.01). The mechanical pain threshold increased (P<0.05). The incubation time of the hot plate was shortened (P<0.01). MNCV, SNCV, and Flux increased (P<0.05). The expression level of SOD was increased (P<0.01). The expression levels of MDA, IL-1β, and TNF-α were decreased (P<0.01). The mRNA expression levels of AMPKα, AMPKβ, PGC-1α, and SIRT3 were increased (P<0.01). The sciatic nerve fibers in the high-dose Tangbikang granule group were tighter and more neatly arranged, with only a few demyelinating changes. The high, medium, and low dose Tangbikang granule groups showed a significant dose-effect trend. ConclusionTangbikang granules may improve sciatic nerve function in diabetic rats by regulating AMPK/PGC-1α/SIRT3 signaling pathway partly to inhibit oxidative stress.
10.Effects of three sterilization methods on the magnetic flux of magnetic surgical devices and analysis of sterilization cost
Feng MA ; Aihua SHI ; Xiaoyan ZENG ; Fang BAI ; Ningxia JIA ; Hao XUE ; Fengling WANG ; Yan LI ; Xufeng ZHANG ; Yi LÜ ; Lingling SHI
Journal of Xi'an Jiaotong University(Medical Sciences) 2024;45(4):669-673
Objective To analyze the effects of three sterilization methods,namely,pressure steam,low-temperature plasma and ethylene oxide,on the magnetic flux of magnetic surgical devices and their sterilization costs.Methods A total of 234 magnetic surgical devices of different specifications and models(magnetic rings)were randomly divided into Group A,Group B and Group C after the paired number was labelled,and each group consisted of 78 pieces(39 pairs).After packaging each pair of devices according to sterilization specifications,Group A was sterilized by pressure steam,Group B was sterilized by low-temperature plasma,and Group C was sterilized by ethylene oxide.We measured the magnetic flux of three sets of magnetic rings before and after sterilization,and comparatively analyzed the sterilization cost and sterilization time of the single package.Results There was no statistically significant difference in the impact of the three sterilization methods on the magnetic flux of the magnetic surgical devices(P>0.05),but there was a significant difference in the magnetic flux before and after sterilization for each sterilization method(P<0.001);the sterilization cost was(1.96±0.16)yuan for Group A,(23.17±0.32)yuan for Group B,and(8.16±0.18)yuan for Group C,showing statistically significant differences among the three groups(P<0.01).The sterilization time was(65.21±3.36)min for Group A,(45.46±1.39)min for Group B,and(1020.38±12.21)min for Group C,with statistically significant differences among the three groups(P<0.01).Conclusion None of the three sterilization methods affects the magnetic flux of the magnetic surgical devices.Pressure steam method shows the lowest cost of single package,low-temperature plasma method shows the highest cost of single package,while ethylene oxide method shows the highest sterilization time.Pressure steam should be the preferred sterilization method for magnetic surgical devices.

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