BACKGROUND:No international reports had shown that statins were effective for the treatment of vascular cognitive impairment. However, Chinese studies concerning effects of statins on vascular dementia had a smal sample size, so no definite conclusion was obtained.
OBJECTIVE:To perform a meta-analysis on effects of statins on vascular cognitive impairment, the methods recommended by the Cochrane Col aboration were used.
METHODS:The databases such as China National Knowledge Internet, Wanfang, VIP, Chinese Biological and Medical Database and PubMed Medline were searched by computer and manual y for randomized control ed trials about the effect of statins on vascular cognitive impairment. Retrieval time was from foundation to January 2013. The studies were screened according to the inclusion and exclusion criteria and then the data were extracted. The methodological quality of included studies was assessed and meta-analysis was performed by Revman 5 software.
RESULTS AND CONCLUSION:This study final y included 15 randomized control ed trials, a total of 1 203 patients, including 616 in statins group and 587 in control group. The fixed and random effect models were used to analyze mini-mental state examination and activity of daily living scales including 14 scoring method and the Barthel index score. Compared with the control group, mini-mental state examination scores in the patients of statins group (14 randomized control trials, 1 112 patients) were, mean difference (MD)=3.02, 95%confidence interval (CI):2.26 to 3.77, P<0.000 1;activity of daily living scores (14 scoring method, 7 randomized control ed trials, 513 patients) were, MD=-4.14, 95%CI:-6.11 to-2.18, P<0.000 1;the Barthel index scores (2 randomized control ed trials, 171 patients) were, MD=11.62, 95%CI:9.78 to 13.46, P<0.001. Our study mentioned a total of 14 cases of adverse reactions. One case was in control group, and the other 13 cases were in statins group which were al caused by atorvastatin. There were no serious adverse reactions in statins group and the rate of adverse reactions was 2.1%. The current evidence suggested that statins can improve cognitive function in patients with vascular cognitive impairment, with good safety. However, further conclusion stil requests higher quality of randomized control ed trials.

This report emphasizes on US diagnostic characteristics of partly BSTT,including OSteogenic sarcotma in 57 cases,chondrosarcoma in 25 cases, fibrosarcoma in 18 cases, synovial sarcoma in 14 cases, myelogenous neoplasm in 21 cases.metastatic bone ttmlor in 67 cases,giant cell turnor of bone in 52 cases, chordoma in 25 cases,hemangioma In 32 cases,desmoplastic fibroma in 10 cases. Pigrnenled villonodular synovius in 10 cases,and aneurysmal bone cyst in 8 cases, altogether 563 cases. The study firstly presents the application and specific menifestation of US diagnosis in BSTI. In many aspects,US is superor to X-ray, CT and MRI in diagnosing BSTT. It provides a great deal of reliable basis for clinical diagnosis and. Treatment.

Objective The patients with metastatic spinal tumors often suffered from severe back pain and spinal cord compression directly caused by tumor tissue or severe spine kyphosis.In order to treat or prevent spinal cord paralysis,decompression and stabilization should be performed on the patients with spinal pain and /or severe spinal cord compression.Methods From July1998through July2001,62patients(27women and35men)with metastatic spinal tumors had been treated at our department.Of 62patients,the thoracic vertebrae were involved in37cases,lumbar vertebrae in19and cervical vertebrae in6.Among43of 62patients who pre sented with neurological dysfunction,24patients were incompletely para plegic and the others were completely paraplegic.The fol low-up ranged from8to36months.Results Pain relief was ob-tained in58of 62patients(94%),and good neurological recovery was obtained in33of the43patients.Improved bowel and bladder function was obtained in12of 25patients who presented with bowel and blad der dysfunction.After decompression,neurological function,evaluated as Frankel grade E or D,was ob-tained in5patients whose neurological function had been evaluated as Frankel grade A or B,and other9pa-tients ex perienced a neurological recovery from Frankel grade A or B to C or D.Conclusion The time developing from neurological dysfunction to complete para plegia is the most important prognostic factor.Poor prognosis is often inevitable when complete paraplegia appeared less than48hours.Complete loss of bowel and bladder function is also a factor for poor prognosis.Decompression should be performed immedi -ately if the patient is presented with neurological dysfunction.Spinal metastasis of thyroid or breast cancer has a rela tive good prognosis.However,metastasis of lung or liver cancer is associated with a short-term survival.Neu rological function of patients with spinal metastasis at thoracic region is more difficult to recover.Com-mon motor and sensory functions are often improved earlier than bowel and bladder function.Thorough re-section of metastatic tumor and stable in ternal fixation should be performed when single vertebra is involved.Conservative tumor resection,decompression and posterior internal fixation should be performed when two or more seg ments are involved in order to alleviate paraplegia,improve spinal stability and the quality.[

Objective To explore the complications of the total elbow arthroplasty after the resection of the peri-elbow tumor. Methods Between June 1998 and June 2002, eight patients underwent total elbow arthroplasty after resection of tumors, which involved 7 males and 1 female (mean age, 42.6 years; range, 22-63 years). The patients included 1 metastasis, 1 GCT, 2 MFH, 1 osteosarcoma, 1 lymphoma, 1 desmoid fibroma, and 1 synovial sarcoma. The tumors located 3 in distal humerus, and 5 in proximal ulna. For those of the distal humerus, after the resection of the tumors, the origins and the insertions of the musculi flexors, extensor, pronators and supinators were repaired as far as possible. The application of the prothesis was relatively simple, the prosthetic stem of the distal humerus was cemented, the intercondylar notch was sawn off, but both the lateral and medial epicondyles were kept, the prothesis impacted in the notch; While for those tumors located on the proximal ulna, the stem was spiraled in the intramedullary cavity, Patients were evaluated according to the Mayo Elbow Performance Score. Results All the patients were followed up at least one year or to death (mean duration, 2.5 years). Pain scores decreased from a mean of 3.6 to 2.0. Mean elbow motion from extention to flexision arc improved from 29? to 73? (range, 55?-105?). Seven cases were excellent or good (87.5%), and only one was poor (12.5%). There were none of the complications, such as infection, incision non-union and nerve injury. All patients without local recurrence as well. The X-ray didn't reveal any sign of loosening or breakage for the artificial elbow joint. Conclusion Total elbow arthroplasty after resection of tumors can decrease the pain and improve the function substantially. For metastatic tumors, this technique can be also used to alleviate symptom if there is no other good option.

Objective To discuss the techniques of tumor resection, pelvic reconstruction and postoperative management by reviewing the patients with malignant pelvic tumors in recent years. Methods 76 patients with primary malignant pelvic tumors were treated operatively between July 1997 and July 2003. The series comprised 47 males and 29 females. 31 cases were diagnosed as chondrosarcoma, 15 as Ewing sarcoma, 7 as osteosarcoma, 3 as lymphoma, 3 as malignant fibrohistiocytoma (MFH), 1 as hemangiopericytoma, 2 as myeloma, 13 as giant cell tumor(GCT). According to Enneking's division, the most common region of the primary pelvic tumor involved was region Ⅱ (51 cases), followed by region Ⅰ (16 cases) and region Ⅲ (9 cases). 16 cases were reconstructed with threaded pins and cement after resection of the ilium. 9 patients had local resection of pubis and ischium. 21 patients had hemipelvectomy. Among 30 patients with periacetabular tumors, 8 were reconstructed with hemipelvic prosthesis, 7 with saddle prosthesis, 6 with replantation of cauterized tumor bone and total hip arthroplasty, 9 with cemented total hip replacement after curettage of lesion. Results After 16 months to 6 years follow-up, among the 21 patients with hemipelvectomy, 4 patients had local relapse because the sacrum invaded by the tumors. 7 of 25 patients with lesions in regionⅠ or region Ⅲ had local relapse postoperatively due to the marginal incision to the acetabula. Among the 21 patients who had tumor resection and reconstruction in region Ⅱ, 4 had local relapse, 3 of which reconstructed with cauterized hemipelvis. As for functional recovery, all of the 25 patients with lesions in region Ⅰand region Ⅲcould walk postoperatively without assistance of a cane. 21 patients with acetabular reconstruction after resection of lesions in region Ⅱ could sit and stand normally and walked with a cane, some of them even had normal gait. Conclusion The major principle of treatment for primary pelvic tumor is that en bloc resection, only then the functional reconstruction of pelvic ring can be considered. Operators should be acquainted with advantages and shortcomings of different reconstructive methods of acetabulum to prevent the complications.

[Objective]To observe the clinical results of percutaneous vertebroplasty in the treatment of painful osteoporotic thoracolumbar vertebral body compression fractures in old people.[Method]Six cases of PVP and 2 cases of kyphoplasty were performed with polymethylmethacrylate(PMMA) through unipedicular or bipedicular under C-arm fluoroscopy.[Result]No leakage of PMMA was found in the operation,the pain was clearly relieved or disappeared postoperatively,no severe complication occurred.[Conclusion]PVP is safe,effective and enconomical in the treatment of painful osteoporotic thoracolumbar vertebral body compression fracture.

OBJECTIVE:To systematically evaluate the efficacy of transcranial direct current stimulation on the motor function of patients with Parkinson's disease,and to compare the efficacy of transcranial direct current stimulation at different targets on the motor function of patients with Parkinson's disease,so as to provide a theoretical basis for the target selection of transcranial direct current stimulation in clinical practice. METHODS:Cochrane Library,PubMed,Web of Science,CNKI,VIP,WanFang Data were retrieved for randomized controlled trials on the improvement of motor function in patients with Parkinson's disease by transcranial direct current stimulation published from the database inception to January 2023.The keywords were"Parkinson,transcranial direct current stimulation"in English and Chinese.The quality of the included studies was evaluated using the Cochrane 5.1.0 risk of bias assessment tool and the PEDro scale.Meta-analysis of outcome indicators was performed using RevMan 5.4 and Stata 17.0 software. RESULTS:Fifteen randomized controlled trials were finally included,and the PEDro scale showed that all were high-quality or very high-quality studies.Meta-analysis showed that transcranial direct current stimulation significantly improved Unified-Parkinson Disease Rating Scale part III score[mean difference(MD)=-2.49,95%confidence interval(CI):-4.42 to-0.55,P<0.05),step frequency score(MD=0.07,95%CI:0.03-0.11,P<0.05)and step speed score(MD=0.02,95%CI:0.00-0.05,P<0.05),but not for Berg Balance Scale scores(MD=2.57,95%CI:-0.74 to 5.87,P>0.05).Network Meta-analysis probability ranking:In terms of Unified-Parkinson Disease Rating Scale part III scores,the probability ranking results of target stimulation efficacy were dorsal lateral prefrontal cortex(52.4%)>primary motor cortex(45.8%)>central point of the brain(1.8%)>conventional rehabilitation(0%);in terms of gait frequency scores,the probability probability ranking results of target stimulation efficacy were cerebellum(50.1%)>central point of the brain(45.8%)>dorsal lateral prefrontal cortex(3.9%)>primary motor cortex(0.2%)>conventional rehabilitation(0%);in terms of gait speed scores,the probability ranking results of target stimulation efficacy were cerebellum(64.8%)>dorsal lateral prefrontal cortex(23.8%)>central point of the brain(9.4%)>primary motor cortex(1.7%)>conventional rehabilitation(0.4%);in terms of Berg Balance Scale scores,the probability ranking results of target stimulation efficacy were cerebellum(77.4%)>dorsal lateral prefrontal cortex(20.7%)>central point of the brain(0.7%)>conventional rehabilitation(0.2%). CONCLUSION:Transcranial direct current stimulation significantly improves motor function of patients with Parkinson's disease,with better motor coordination in the dorsolateral prefrontal cortex and better walking and balance in the cerebellum.

Objective:Based on the specific cleavage and non-specific "trans-cleavage" activities of the clustered regularly interspaced short palindromic repeats (CRISPR) and CRISPR-associated protein(CRISPR/Cas13), we established a visually amplification-free rapid detection technique of 2019-nCoV nucleic acid. This technique is easily processed with a low detection limit and good specificity.Methods:According to the 2019-nCoV gene sequence, specific CRISPR RNAs were screened and designed by bioinformatics analysis, and then synthesized as universal signal-strained RNA transcription targets in vitro to establish and optimize the reaction system. Moreover, the 2019-nCoV pseudoviral nucleic acid was used as a standard substance to evaluate the detection limit. A total of 65 positive samples were collected from various 2019-nCoV variants, while 48 negative samples included other clinically common respiratory pathogens, such as influenza A virus, influenza B virus, human parainfluenza virus, Klebsiella pneumonia, etc. All samples were tested by quantitative PCR (qPCR), digital PCR, and the method established in this study. The sensitivity and specificity of the newly established method were analyzed and evaluated. Results:With the newly established technique, the detection time for 2019-nCoV nucleic acid could be minimized to 6 minutes. In addition, the detection limit was 14 copies/μl when assisted by the displaying instrument, whereas it increased to 28 copies/μl with the naked eye. This technique had a sensitivity and specificity of 98.5% (66/67) and 100% (46/46) respectively, showing no statistically significant difference compared to the gold standard qPCR( P=1). Conclusions:This study has successfully established a CRISPR/Cas13a-based visually rapid detection technique for 2019-nCoV nucleic acid. This technique offers the advantages of a simple process, convenient operation, low environmental operating requirements, a detection limit close to qPCR, and a strong potential for on-site testing applications.

Pyriform sinus fistula is a rare clinical disease, often with recurrent acute suppurative thyroiditis or neck infection in children.The traditional method treatment is complete resection of the fistula with or without hemithyroidectomy in external cervical surgical approach, but in recent years, minimally invasive endoscopic occlusion of the internal opening for the treatment of pyriform sinus fistula is performed in many hospitals, including electrocautery, chemocautery, laser cauterization, biocauterization, and suture closure. Literatures about endoscopic management of pyriform sinus fistula in children are reviewed and various surgical methods, complications and success rate are evaluated.

OBJECTIVE：To s tudy improvement effect and mech anism of ilicifoliosids alkaloid A （HBOA）on non-alcoholic fatty liver disease in rats. METHODS ：SD rats were randomly divided into blank control group ，model group ，Silybin capsule group（positive control ，26.25 mg/kg），HBOA high-dose ，medium-dose and low-dose groups （100，50，25 mg/kg），with 10 rats in each group. Except that blank control group fed normal feed ，the other groups were continuously fed with high-fat diet for 8 weeks to induce non-alcoholic fatty liver disease model. Form the 9th week ，blank control group and model group were given constant volume of 0.6％ CMC-Na solution ，and administration groups were given corresponding drugs by intragastric admini- stration，once a day ，for consecutive 4 weeks. The general information of rats were observed and the body weight increase ，organ （liver，kidney and spleen ）indexes were calculated ；the contents of AST ，ALT，TC，TG and NEFA in liver tissue were detected ， and SOD，GSH-Px activities and MDA content in the serum were also determined. The protein expression of PPARα in liver tissue was detected by immunohistochemistry. RESULTS ：Compared with blank control group ，the body mass increase and liver index of rats in model group were increased significantly （P＜0.01）；fat deposition could be observed in the liver ；the activities of SOD and GSH-Px in serum were reduced significantly ，and the contents of MDA ，the contents of AST ，ALT，TC，TG and NEFA in liver tissue were significantly increased ，and the protein expression of PPARα was decreased significantly（P＜0.01）. Compared with model group ，the body mass increase and liver index of the rats were decreased significantly in administration groups （P＜0.05 or P＜0.01），liver fat deposition was improved ，the activity of SOD and GSH-Px in serum （except for HBOA low-dose group ）were increased significantly while MDA content ，the contents of AST ，ALT，TC（except for HBOA low-dose group ），TG（except for HBOA low-dose group ） and NEFA in liver tissue were decreased significantl y，while protein expression of PPAR α 15177460685@163.com was increased significantly （P＜0.05 or P＜0.01）. Some of the above indexes of HBOA high-dose group were 电话：0771-5302433。E-mail：junlin898@126.com significantly better than HBOA medium- and low-dose group（P＜0.05）. CONCLUSIONS ：HBOA has a certain improvement effect on non-alcoholic fatty liver disease in rats caused by high-fat diet ，and its mechanism may be related to improving lipid metabolism disorders ，anti-oxidative stress and up-regulating the expression of PPARα.