Clinical practice guidelines represent the best recommendations for patient care. They are developed through systematically reviewing currently available clinical evidence and weighing the relative benefits and risks of various interventions. However, clinical practice guidelines have to go through a long translation cycle from development and revision to clinical promotion and application, facing problems such as scattered distribution, high duplication rate, and low actual utilization. At present, the clinical practice guideline information platform can directly or indirectly solve the problems related to the lengthy revision cycles, decentralized dissemination and limited application of clinical practice guidelines. Therefore, this paper systematically examines different types of clinical practice guideline information platforms and investigates their corresponding challenges and emerging trends in platform design, data integration, and practical implementation, with the aim of clarifying the current status of this field and providing valuable reference for future research on clinical practice guideline information platforms.

OBJECTIVE To explore the effect of volatile oil of Ligusticum chuanxiong on the transdermal properties and cytotoxicity of triptolide in vitro. METHODS The chemical constituents of the volatile oil of L. chuanxiong were analyzed by gas chromatography-mass spectrometry. The lower abdominal skin of KM mice was separated and divided into triptolide group， triptolide in compatibility with volatile oil of L. chuanxiong groups at 1∶10， 1∶50， 1∶100 （hereinafter referred to as “compatibility 1∶10”“compatibility 1∶50”“compatibility 1∶100” groups）. After the skin of mice in each group was fully exposed to 0.2 g of the corresponding cream for 24 h， the cumulative transdermal dose （Qn） of triptolide in the receiving solution of each group was determined by high-performance liquid chromatography， and the transdermal absorption rate （Jss） was calculated. Human immortalized keratinocytes （HaCat） were used as a model， the CCK-8 method was used to detect the cell survival rate of different concentrations of the volatile oil of L. chuanxiong and triptolide before and after compatibility. RESULTS A total of 62 chemical constituents of the volatile oil of L. chuanxiong were identified， including Z-ligustilide， senkyunolide， and β-selinene. The Qn （P＜ 0.01） and Jss of triptolide increased within 24 h in the compatibility 1∶10 and 1∶50 groups， while the Qn （P＜0.05） and Jss decreased in the compatibility 1∶100 group as compared with the triptolide group. Compared with the triptolide group， the cell survival rate of HaCat was significantly increased in the compatibility 1∶10 and 1∶50 groups when the triptolide concentrations were 36， 72 and 144 ng/mL （P＜0.05 or P＜0.01）； while the cell survival rate of HaCat was decreased in the compatibility 1∶100 group， but the difference was not statistically significant （P＞0.05）. CONCLUSIONS When the compatibility ratio of triptolide and volatile oil of L. chuanxiong was 1∶10 or 1∶50， it can promote the transdermal absorption of triptolide and reduce the cytotoxicity of triptolide to HaCat.

Objective To explore the clinical effect of endoscopic sclerosing agent and tissue glue injection combined with ligation in the treatment of rectal ectopic varices(EV)bleeding.Method A retrospective analysis was conducted on 60 patients with rectal EV bleeding who received endoscopic treatment from January 2017 to January 2022.According to the surgical method,the patients were divided into two groups,with 30 cases in the control group receiving endoscopic ligation treatment;30 cases in the observation group were treated with endoscopic scleroing agent and tissue glue injection combined with ligation.Follow up was conducted according to a cycle of 1,3,6 and 12 months after surgery,and the following indicators were compared between the two groups of patients:successful surgical hemostasis rate,incidence of postoperative complications,mortality rate,improvement of postoperative varicose vein diameter,and postoperative response rate.Result The success rate of surgical hemostasis in the observation group was 93.3%,significantly higher than 66.7%in the control group,the incidence of abdominal pain and fever in the observation group was 10.0%and 10.0%,respectively,significantly lower than 33.3%and 36.7%in the control group,there were 2 deaths in the observation group and 9 deaths in the control group,the mortality rate in the observation group was 6.7%,significantly lower than the 30.0%in the control group,the preoperative venous diameter of the observation group was(1.60±0.36)cm,and the postoperative diameter continued to decrease,at the 12th month after surgery,the diameter was(0.78±0.31)cm,while in the control group,the preoperative venous diameter was(1.52±0.26)cm,the postoperative diameter continued to increase,and at the 12th month after surgery,the diameter was(1.55±0.36)cm,the postoperative effective rate of the observation group was significantly better than that of the control group,the differences were statistically significant(P<0.05).Conclusion The combination of endoscopic scleroing agent and tissue glue injection combined with ligation for the treatment of rectal EV bleeding has a higher success rate and effective rate of surgical hemostasis,fewer postoperative complications,lower mortality rate during follow-up observation,and satisfactory clinical efficacy.It is worth further promoting and applying in clinical practice.

Objective To investigate the therapeutic effect of low-carbohydrate diet and online lifestyle intervention on patients with lean nonalcoholic fatty liver disease(NAFLD).Methods This study was conducted among 53 patients with lean NAFLD who attended Department of Infectious Diseases in Peking University Shenzhen Hospital and Shenzhen Qianhai Shekou Free Trade Zone Hospital from December 2019 to March 2021,and the patients were given low-carbohydrate diet for calorie restriction[total calorie intake was calculated based on basal metabolic rate(BMR)and physical activity level(PAL)and was restricted within(BMR×95%×PAL-1 000)kcal to(BMR×95%×PAL-500)kcal,and carbohydrate ratio fluctuated between 10%and 55%]and lifestyle interventions for 8 weeks.An online software was used for supervision and follow-up,and the patients were observed in terms of treatment outcome and safety.The patients were compared in terms of controlled attenuation parameter(CAP),liver stiffness measurement(LSM),Anthropometric parameters,blood biochemistry,urinary protein,and urine ketone body before and after intervention.The patients were followed up after 1 year to measure body weight and body mass index(BMI).The independent-samples t test was used for comparison of normally distributed continuous data between two groups,and the paired-sample Wilcoxon rank-sum test was used for comparison of non-normally distributed continuous;the chi-square test was used for comparison of categorical data between groups.Results After 8 weeks of intervention,CAP decreased from 304.47±31.91 db/m to 242.43±26.74 db/m,LSM decreased from 7.43±2.41 kPa to 6.36±1.79 kPa,and body weight decreased from 64.29±7.37 kg to 60.24±7.08 kg(t=11.25,3.72,and 14.07,all P<0.001).Of all patients,25(47.2%)had disappearance of fatty liver,and abnormal LSM in 12 patients(63.2%)returned to normal;52 patients(98.1%)had a mean reduction of 4.05±2.32 kg in body weight.The degree of reduction in CAP increased with the degree of reduction in body weight.After intervention,there were significant reductions in BMI,waist circumference,hip circumference,alanine aminotransferase(ALT),aspartate aminotransferase(AST),gamma-glutamyl transpeptidase(GGT),uric acid,fasting blood glucose,triglyceride(TG),total cholesterol(TC),and low-density lipoprotein(LDL)and a significant increase in high-density lipoprotein(t=12.85,13.77,10.28,7.64,6.21,8.35,6.83,6.31,7.4,4.97,5.95,and-2.21,all P<0.05).The patients with abnormal ALT,AST,GGT,uric acid,fasting blood glucose,TG,TC,and LDL at baseline which returned to normal after intervention accounted for 75%,100%,81.8%,57.1%,100%,66.7%,73.5%,and 85.3%,respectively.There were no significant changes in blood urea nitrogen,serum creatinine,urine protein,and urine ketone body(all P>0.05).There was no rebound in body weight and BMI after 1 year of follow-up(P>0.05).There were no gastrointestinal reactions during intervention or follow-up.Conclusion Low-carbohydrate diet and lifestyle intervention can improve liver fat content,liver function,and blood lipid parameters in patients with lean NAFLD,with good safety.

Objective:To establish a classification system for the repair band in the subchondral bone origination point in MRI for traumatic osteonecrosis of the femoral head (ONFH) and preliminarily explore the correlation between this classification and the progression of femoral head collapse.Methods:A retrospective analysis was conducted on 73 cases of traumatic ON-FH treated at the Quanzhou Orthopedic-traumatological hospital from January 2000 to December 2019. Among them, there were 46 males and 27 females with an average age of 34.9±8.3 years (range 19-55 years). Clinical and radiological data such as age, gender, side, fracture classification, reduction quality, JIC classification, and bone repair band (BRB) classification were recorded. The progression of traumatic ONFH was assessed using the ARCO staging system, with stages IIIA and IIIB defined as mild collapse and progressive collapse, respectively. The BRB classification was established based on MRI findings, and the inter- and intra-observer consistency of the BRB classification was analyzed using Kappa test. The correlation between the BRB classification and progressive femoral head collapse was analyzed using the Kaplan-Meier survival curve and binary variable Cox regression analysis.Results:According to the BRB classification, 73 cases were divided into type 1 with superficial lesion in 38.4%, type 2 with uncertain lesion in 21.9%, and type 3 with extensive lesion in 39.7%. The inter-observer consistency Kappa value for the BRB classification was 0.798, and the intra-observer consistency Kappa value was 0.896, indicating a high level of consistency. A follow-up of 73 cases (54.8±34.9 months, range 24-165 months) showed a significant correlation between the BRB classification and ARCO staging at the last follow-up (χ 2=37.556, P<0.001), with progression to stages IIIA and IIIB as follows: type 1 had 3 and 1 cases, type 2 had 4 and 1 cases, and type 3 had 14 and 12 cases, respectively. Using the occurrence of progressive collapse (stage IIIB) as the endpoint, the risk of progression to stage IIIB for type 2 was not statistically different from type 1 [ HR=1.766, 95% CI (0.465, 6.702), P=0.403]; the risk of progression to stage IIIB for type 3 was significantly higher than for type 1 [ HR=15.126, 95% CI (4.708, 48.592), P<0.001]. Conclusion:The BRB classification is closely related to the progression of traumatic ONFH and is an independent risk factor for predicting the occurrence of progressive collapse; this classification is helpful for early diagnosis and predicting the progression of collapse and treatment plan decision-making.

Objective:To compare the efficacy of oral sulfate solution (OSS) and polyethylene glycol (PEG) electrolyte powder for colonoscopy bowel preparation.Methods:A total of 283 randomized patients from 9 centers in China taking OSS ( n=143) or PEG ( n=140) using two-day split bowel preparation regimen received colonoscopy and assessment. The primary index was the bowel preparation success rate [global Boston bowel preparation scale (BBPS)≥ 6 by independent assessment center]. Secondary indices included BBPS global and segmental scores, investigator satisfaction (5-point Likert scale) with the quality of bowel preparation, patient satisfaction assessed by questionnaires, and patient tolerance assessed by Sharma scale. Compliance and safety were compared between the two groups. Results:The bowel preparation success rates were 100.0% for OSS and 99.3% for PEG [adjusted difference 0.7% (95% CI: -5.3% - 6.7%), P<0.001 for non-inferiority]. The BBPS global score in OSS group was significantly higher than that in PEG group (8.1 VS 7.7, P<0.001). The segment BBPS scores were also higher in OSS group than those in PEG group for all 3 segments (right colon: 2.4 VS 2.3, P=0.002; transverse colon: 2.8 VS 2.7, P=0.018; left colon: 2.8 VS 2.7, P=0.007). Investigator Likert score in the OSS group was significantly higher than that in the PEG group (2.6 VS 2.3, P<0.001). There was no significant difference in compliance between OSS and PEG, except for the second dose (90.9% VS 82.6%, P=0.039). There was no significant difference in patient satisfaction, Sharma score or proportion of patients with tolerance-related symptoms between the two groups. Safety was comparable between the two groups, and all adverse events were mild to moderate. Conclusion:OSS has comparable efficacy with PEG, with higher BBPS scores in all segments, better investigator satisfaction, better compliance in split dose, and comparable patient tolerance and safety.

Objective: To observe the changes of LC3, lc3-Ⅱ/lc3-Ⅰ ratio, Nrf2 and Bcl2 in myocarditis induced by coxsackievirus group B type 3 (CV-B3) infection and myocardial damage in SD rats caused by particulate matter of four different pollution sources, and to further explore the mechanism of autophagy and apoptosis of myocardial cells and myocardial damage. Methods: Adult SD rats were randomly divided into CV-B3 infection group (20 rats), automobile exhaust group (20 rats), coal smoke group (20 rats), burning straw group (20 rats), atmosphere group (20 rats) and control group (20 rats). The expressions of LC3, Bcl2 and Nrf2 in rats were detected by Western blot at 12 hours, 48 hours, 5 days and 10 days. Results: In the first three groups of rats expression of LC3, Bcl2 and Nrf2 was upregulated, this was seen early in CV-B3 group, the peak was high, and recovery was fast; while in automobile exhaust group the above changes appeared later, the amplitude was low; in the coal smoke group rats the above changes appeared even later, but the amplitude of change was higher than that in automobile exhaust group, but lower than that of CV-B₃ group. In automobile exhaust and coal smoke groups Bcl2 and Nrf2 expression was still slightly increased at day 10. After 48 hours, the above measurements in rats in the atmosphere group were temporarily up-regulated, and returned to normal on day 5. The above measurements of rats in the straw smoke and the control group did not show significant change. Conclusions In the SD rats with acute viral myocarditis induced by CV-B3 and myocardial damage induced by automobile exhaust, coal smoke and atmospheric particulate matter, the whole process of metabolism, renewal, repair and anti-damage activity of myocardial cells can be accomplished through autophagy activation, apoptosis inhibition and antioxidant mechanism.

Objective: To investigate clinical characteristics of urodynamics in elderly male patients with indwelling urinary catheterization. Methods: Clinical urodynamics of 497 male patients with indwelling urinary catheterization aged 60 years and over from December 2010 to April 2019 in our center were retrospectively analyzed and divided into 3 groups: 60-69-year-old group(n=114), 70-79-year-old group(n=220), and 80-111-year-old group(n=163). According to the catheter indwelling time, the patients were divided into 3 groups: 1-2 weeks group(n=262), 2-4 weeks group(n=47)and over 4 weeks group(n=188). The cause of indwelling urinary catheterization, bladder outlet obstruction, acontractile detrusor and other indicators were observed. Results: The main cause of indwelling urinary catheterization in elderly men was acute urinary retention(55.1%, 274 cases), in that the most common diagnosis was benign prostatic hyperplasia(90.3%, 449 cases). No statistically significant difference in the different catheter indwelling time-related urodynamics between the different age groups was found(χ²=1.606, 0.199 and 2.477, all P>0.05). There were statistically significant differences both in the incidences of bladder outlet obstruction between the 1-2 weeks vs.2-4 weeks vs.over 4 weeks groups[56.9%(149/262)vs.55.3%(26/47) vs.42.6%(80/188), χ²=9.315, P<0.05)], and in the incidences of acontractile detrusor between the 1-2 weeks vs.2-4 weeks vs.over 4 weeks groups[15.6%(41/262)vs.12.8%(6/47)vs.29.8%(56/188), χ²=15.319, all P<0.05)]. There was no statistically significant difference in catheter indwelling time-related urodynamics between two groups with normal detrusor muscle function and weak detrusor muscle function(P>0.05). Clinical urodynamics had no statistically significant in different age groups(P>0.05). Conclusions Bladder outlet obstruction is the main cause of indwelling urinary catheterization in elderly men.Urodynamic examination can be performed 1-2 weeks after indwelling urinary catheterization.Age has no significant effect on the catheter indwelling time-related urodynamics.The duration of indwelling urinary catheterization has little effect on the urodynamic diagnosis in patients with normal or weak detrusor muscle contractile strength.The elderly patients may have acontractile detrusor if the duration of indwelling urinary catheterization is more than 4 weeks.

OBJECTIVE: To establish the occupational exposure limits for methyl t-butyl ether(MTBE) in the air of workplace in China. METHODS: According to the GBZ/T 210.1-2008 Guide for Establishing Occupational Health Standards--Part 1: Occupational Exposure Limits for Airborne Chemicals in the Workplace, we collected and analyzed data on physical and chemical properties, toxicology, occupational epidemiology and foreign occupational exposure limits related to MTBE by literature search. A total of 180 occupational workers exposed to MTBE were selected as exposure group, and 155 workers and administrative logistics personnel without exposure to MTBE were selected as the control group. Occupational hygiene investigation and occupational physical examination were carried out. We deduced the occupational exposure limits for MTBE in workplace air in China by combining literature data. RESULTS: The time-weighted average(TWA) of MTBE in the workplace air developed by the United States of America and Britain is 180.00 mg/m~3. The short-term exposure limit(STEL) of MTBE in the workplace air developed by Australia and New Zealand is 270.00 mg/m~3. The concentration of TWA(C_(TWA)) of MTBE in the exposure group was less than 0.08-4.90 mg/m~3. The concentration of short term exposure was less than 0.10-14.28 mg/m~3, and the C_(TWA) was less than 0.02-83.66 mg/m~3, in parts of workplaces. There was no statistically significant difference on the self-conscious discomfort and the abnormality in physical examination between these two groups(P>0.05). CONCLUSION: It's recommended that the permissible concentration-TWA of MTBE should be set at 180.00 mg/m~3, and the permissible concentration-STEL should be set at 270.00 mg/m~3 in China.

Objective:To explore the biological effects of amino acid transporter gene SLC7A5 (solute carrier family 7,member 5) on tumor cells and the regulatory mechanism at transcriptional level.Methods:The expression of SLC7A5 was examined in human normal tissues and corresponding tumor tissues by Gene Expression Omnibus (GEO) database.The recombinant plasmid of SLC7A5 gene was constructed,and the effect of the SLC7A5 gene on tumor cell proliferation was investigated by methylthiazolyldiphenyl-tetrazolium bromide (MTT) and flow cytometry.SLC7A5 gene promoter and transcription factor binding sites were predicted through bioinformatics analysis,and the gene promoter recombinant plasmid was constructed.Then the dual luciferase reporter gene assay and reverse transcription polymerase chain reaction (RT-PCR) were used to explore the regulation of transforming growth factor-β1 (TGF-β1) signal on SLC7A5 gene expression.Results:The GEO database analysis showed that the distribution of SLC7A5 was tissue specific,and its expression level was significantly higher in the tumor tissues than that in the corresponding normal tissues.The results of MTT and flow cytometry showed that SLC7A5 could promote cell proliferation.Results from the promoter analysis,reporter gene assay and RT-PCR confirmed that TGF-β1 could up-regulate the activity of SLC7A5 promoter and promote the expression of the SLC7A5 gene.Conclusion:SLC7A5 gene plays a role in promoting tumor development,which is regulated by the TGF-β1 signaling pathway.