This study was aimed to develop a simultaneous determination of zinc and cadmium with carbon fiber electrode by linear sweep stripping voltammetry. Effects of analytical base solution, accumulation potential, ac-cumulation time and scanning velocity were also investigated on the determination. The results showed that in 1 mol·L-1 H2SO4 medium solution, zinc and cadmium had good electrochemical response on the carbon fiber electrode and appeared sensitive anodic stripping peaks at-0.97 V and-0.77 V, respectively. The anodic stripping peak cur-rents and concentrations of zinc and cadmium showed good linear relationships, with correlation coefficients R2 of 0.996 5 and 0.995 4, respectively. The detection limits of zinc and cadmium (S/N=3) were 1.5×10-9 mol·L-1 and 1.0×10-10 mol·L-1, respectively. The average recoveries of zinc and cadmium were 98.9%and 98.1%with the rela-tive standard deviations (RSD) of 2.72%and 2.45%(n=6), respectively. It was concluded that the method of simul-taneous determination of zinc and cadmium with carbon fiber electrode was simple, sensitive and accurate.

Skeletal muscle dysfunction is a common extrapulmonary disease in patients with chronic obstructive pulmonary disease (COPD) , and about 92% of COPD patients have skeletal muscle dysfunction. In order to effectively deal with and control the skeletal muscle dysfunction in COPD patients, it is particularly important to choose a scientific and effective evaluation method to accurately and reliably assess the skeletal muscle function. This article reviews the common evaluation methods of skeletal muscle function in COPD patients from the aspects of muscle strength, muscle mass, muscle endurance, and exercise ability, and discusses the application status, advantages and disadvantages of different evaluation methods, so as to provide references for follow-up research and targeted intervention.

Objective:To evaluate the effect of five external treatment methods of traditional Chinese medicine on the pain of patients with lumbar disc herniation (LDH) through a network Meta-analysis.Methods:The published article on the effect of external treatment methods of Traditional Chinese Medicine in patients with LDH was retrieved by computer in China National Knowledge Infrastructure, WanFang Database, VIP, China Biomedical Database, PubMed, Cochrane Library and Web of Science. The retrieval time limit was from the establishment of the database to May 31, 2022. Two researchers independently screened the article according to the inclusion and exclusion criteria, extracted the information and evaluated the quality. Review Manger 5.4 software was used to draw the bias risk map and Stata SE 16.0 software was used to conduct the network Meta-analysis.Results:A total of 1 133 patients were included in 12 articles, and there were five kinds of external treatment methods of Traditional Chinese Medicine. The results of network Meta-analysis showed that except for acupoint application, scraping, Traditional Chinese Medicine iontophoresis, Traditional Chinese Medicine scalding, auricular point sticking had statistically significant differences in the effect of pain compared with conventional treatment and nursing ( P<0.05). There were no statistically significant differences between the five external treatment methods of Traditional Chinese Medicine ( P>0.05). The cumulative ranking plot showed that scraping was the best intervention method for pain in LDH patients, with a surface under the cumulative ranking ( SUCRA) value of 80.3%. Conclusions:Scraping is the best external treatment of traditional Chinese medicine to relieve the pain of LDH patients, but it still needs to be further demonstrated by a large number of high-quality randomized controlled trials.

Acute Stanford type A aortic dissection with important branches involved is more complex, could lead to organ malperfusion syndrome even organ failure. The understanding of pathological anatomy, classification, staging, and the pathophysiological change has increasingly mature, but not complete. In addition, the treatment strategy for complex lesions is diversified, some questions may not reach consensus. Fully understanding of the anatomical and pathophysiology is very important for surgeons to choose reasonable treatment strategy. As the rapid development of the basic research, imaging techniques and the concept of surgery procedures, the manage technique of Stanfrod type A dissection and branch vessels at the same time is getting seriously, the related issues also need further discussions.

Objective Meta-analysis was used to evaluate the effect of the solution-focused brief therapy on im-proving the anxiety and depression status of patients with HIV/AIDS.Methods Computer search of PubMed,Embase,Web of Science,Cochrane Library,CINAHL,PsycINFO,Chinese Biomedical Literature Database,China Na-tional Knowledge Infrastructure,Wanfang Database,CQVIP were conducted,and the search time frame was from the establishment of databases until April 9,2023.There were 2 investigators who independently screened the literature according to inclusion and exclusion criteria,extracted data and performed quality evaluation,and performed Meta-analysis using RevMan 5.4 software.Results A total of 11 publications were included,including 9 randomized controlled trials and 2 quasi-experimental studies,with a total of 1 219 patients with HIV/AIDS.Meta-analysis re-sults showed that solution-focused brief therapy reduced anxiety scores(SMD=-1.89;95%CI:-2.79～-0.99,P＜0.001),depression scores(SMD=-2.45;95%CI:-3.51～-1.39,P＜0.001).Subgroup analysis showed that improved anxiety(SMD=-4.16;95%CI:-7.97～-0.35,P＜0.001),depression(SMD=-5.69;95%CI:-11.20～-0.19,P＜0.001)in pregnant HIV/AIDS patients was significantly better than that in ordinary patients.Conclusion Solution-focused brief therapy is effective in improving anxiety and depression levels in patients with HIV/AIDS,and the application of this model in pregnant patients with HIV/AIDS has a more significant improvement effect,but high-quality,multicenter,large-sample clinical trial studies are needed to further confirm this conclusion in the future.