A domestically produced self-expanding transcatheter aortic valve controllable bending delivery system(VitaFlow? Ⅲcontrollable bending retrievable delivery system)was first used to perform transcatheter aortic valve replacement(TAVR)in a symptomatic severe aortic valve stenosis patient with severe heart failure and high risk of surgery in China on September 22,2023.The patient successfully completed TAVR under general anesthesia,with good valve position and function after the operation.Before discharge and at one month of follow-up,the patient's symptoms and degree of heart failure were significantly improved.The follow-up results of this case showed that the VitaFlow? Ⅲ controllable bending retrievable delivery system for TAVR is safe and feasible,and future prospective,multicenter clinical trials are expected to evaluate its efficacy.

Objective To explore the association between green space and the risk of dyslipidemia. Methods ^“Dyslipidemia^” and ^“ Normalized Difference Vegetation Index (NDVI)^” were used as search terms to search PubMed, Embase, and Web of Science databases for studies up to September 2023. ARHQ statistical assessment and review tool and NOS scale were employed to evaluate the quality of the studies. R 4.3.1 software was used for meta-analysis. Results A total of 11 studies were included, of which 5 cross-sectional studies and 5 cohort studies were rated as ^“high quality^”. The results of meta-analysis showed that an increase in NDVI in some buffer zones was associated with reduced risks of hypercholesterolemia, hypertriglyceridemia, low HDL-C, and high LDL-C, while an increase in NDVI in 100m buffer zone was significantly associated with reduced risks of all these four diseases, with hypercholesterolemia (OR=0.87, P<0.05), hypertriglyceridemia (OR=0.94, P<0.05), low HDL-C (OR=0.95, P<0.05), and high LDL-C (OR=0.87, P<0.05). Sensitivity analysis suggested that the results of most meta-analyses were robust. Conclusion With the increase in green space near residential areas, the risk of dyslipidemia may decrease.

Objective To evaluate the gender differences in fat water fraction(FWF)related to fat metabolism in supraclavicular region of neck with iterative decomposition of water and fat with echo asymmetry and least square estimation iron quantification(IDEAL-IQ)sequence quantitatively.Methods Twenty healthy female and twenty healthy male volunteers were selected for a MRI examination with IDEAL-IQ,then the FWF of R2*,brown adipose tissue(BAT)and white adipose tissue(WAT)were obtained by post-processing.The differences of FWF between the two groups were compared by Mann-Whitney U test.Results There was sig-nificant difference in the FWF of BAT and WAT between the two groups(P＜0.05).The FWF of BAT in the female was higher than that the male,and the FWF of WAT in the male was higher than that the female,there was no significant difference in the R2*between the two groups(P＞0.05).Conclusion IDEAL-IQ sequence can be used to evaluate the FWF in supraclavicular region of neck quantitatively,and classify BAT and WAT,then provide clinical according to the quantitative study of fat content.

Objective To construct a recombinant poxvirus vector vaccine, rVTTδTK-RBD, and to evaluate its safety and immunogenicity. Methods The receptor-binding domain (RBD) gene was synthesized with reference to the gene sequence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and was inserted into the polyclonal site of the self-constructed recombinant plasmid pSTKE, to construct the recombinant poxvirus shuttle vector pSTKE-RBD. This was then transfected into BHK-21 cells pre-infected with the vaccinia virus Tiantan strain (VTT). The recombinant poxvirus rVTTδTK-RBD was successfully obtained after several rounds of fluorescence phage screening. The effect of rVTTδTK-RBD on the body mass of BALB/c mice was detected after immunizing mice by intra-nasal vaccination. The levels of specific and neutralizing antibodies produced by rVTTδTK-RBD on BALB/c mice were analyzed after immunizing mice intramuscularly. The effect of rVTTδTK-RBD on T cell subsets in BALB/c mice was detected by flow cytometry. Results Through homologous recombination, enhanced green fluorescent protein (EGFP) screening marker, and multiple rounds of fluorescent phosphorescence phage screening, a recombinant poxvirus rVTTδTK-RBD, expressing RBD with deletions in the thymidine kinase (TK) gene, was successfully obtained, which was validated by PCR. The in vivo experiments on BALB/c mice showed that rVTTδTK-RBD was highly immunogenic against SARS-CoV-2 and significantly reduced toxicity to the body compared to the parental strain VTT. Conclusion The recombinant poxvirus vaccine rVTTδTK-RBD against SARS-CoV-2 is successfully constructed and obtained, with its safety and immunogenicity confirmed through various experiments.
Animals ; Mice ; SARS-CoV-2/genetics* ; COVID-19 ; Vaccines, Synthetic/genetics* ; Genes, Reporter ; Bacteriophages ; Mice, Inbred BALB C

Objective To explore the therapeutic effect of lymphatic venous anastomosis based on MRI lymphangiography classifi-cation on lower limb lymphedema,and to analyze the factors affecting the therapeutic effect of lymphatic venous anastomosis.Methods A total of 378 patients with secondary lymphedema of lower limbs were selected.All of them underwent MRI lymphangiography.The differ-ence of circumference diameter and complication rate of the lower limbs of different types of patients before and after lymphatic venous anastomosis were compared.After 6 months of follow-up,the therapeutic effect was evaluated according to the International Lymphology Society classification standards for lymphedema.The risk factors affecting the therapeutic effect of lymphatic venous anastomosis was ana-lyzed,and a prediction model was established to analyze the value of this model in evaluating the clinical efficacy of lymphatic venous anastomosis.Results There was no significant difference in treatment efficiency and postoperative complication rate among different types of patients(P＞0.05).The difference of circumference diameter of the lower limbs of type 3,type 4,type 5 and type 6 before and after treatment was greater than that of type 1,type 2 and type 7(P＜0.05).Age,concomitant infection and lymph node venous fistula were the factors affecting the clinical efficacy of lymphatic venous anastomosis(P＜0.05).The risk prediction model for the clinical efficacy of lymphatic venous anastomo-sis was developed through logistic regression analysis:P=1/[1+e(0.531Xage+0.722Xconcomitant infection+0.807Xlymph node venous fistula-1.249)].The Hosmer-Leme-show test indicated that the fitted model matched the standard curve with x2=2.190,P=0.975.The area under the curve(AUC)of the prediction model for the clinical efficacy of lymphatic venous anastomosis was 0.985,with a standard error(S.E)value of 0.009 and a 95％confidence interval(CI)of 0.967 to 1.000.Conclusion Lymphatic venous anastomosis based on MRI lymphangiography classifi-cation has better clinical efficacy and fewer complications in the treatment of lower limb lymphedema,and the prediction model based on the risk factors analysis has a high predictive value for the clinical efficacy of lymphatic venous anastomosis.

Neck dissection(ND)is one of the main treatment methods for oral and maxillofacial malignancies.Although ND type is in con-stant improvement,but intraoperative peal-pull-push injury of the accessory nerve,muscle,muscle membrane,fascia and ligament induced shoulder syndrome(SS)is still a common postoperative complication,combined with the influence of radiochemotherapy,not only can cause pain,stiffness,numbness,limited dysfunction of shoulder neck and arm,but also may have serious impact on patient's life quality and phys-ical and mental health.At present,there is still a lack of a systematic evaluation and rehabilitation management program for postoperative SS of oral and maxillofacial malignant tumors.Based on the previous clinical practice and the current available evidence,refer to the relevant lit-erature at home and abroad,the experts in the field of maxillofacial tumor surgery and rehabilitation were invited to discuss,modify and reach a consenusus on the etiology,assessment diagnosis,differential diagnosis,rehabilitation strategy and prevention of SS,in order to provide clinical reference.

AIM:To explore the effect and mechanism of action of the aqueous extract of Fritillaria ussuriensis(FU-AE)against nonalcoholic fatty liver disease(NAFLD).METHODS:The association between Fritillaria ussuriensis Maxir.(FU)and NAFLD was analyzed by network pharmacology.A mouse model of NAFLD was induced in mice by high fat diet(HFD)+10%fructose drinking water,and three doses of Fritillaria ussuriensis aqueous extract were given to the mice for intervention.Colorimetric assay was used for detection of aspartate aminotransferase(AST),alanine aminotrans-ferase(ALT),triglyceride(TG),total cholesterol(TC),high-density lipoprotein cholesterol(HDL-C),and low-density lipoprotein cholesterol(LDL-C)levels in the serum of experimental mice.Hematoxylin and eosin staining was used to as-sess the pathological and histological changes in the liver of mice and to clarify the anti-NAFLD effect of aqueous extracts of Fritillaria ussuriensis.Liver tissue proteins were extracted,and expression of proteins related to the AMP-activated pro-tein kinase(AMPK)/acetyl-CoA carboxylase(ACC)pathway was detected by Western blot to clarify the mechanism of an-ti-NAFLD action of Fritillaria ussuriensis.The microbial composition of cecum contents was explored using 16S rRNA se-quencing to reveal the modulatory effect of the aqueous extract of Fritillaria ussuriensis on the structure of intestinal flora in mice with nonalcoholic fatty liver disease.RESULTS:Aqueous extract of Fritillaria ussuriensis(high dose)ameliorated exogenous adipocyte infiltration in the liver of mice with NAFLD(P<0.05).AST,ALT,TG,TC and LDL-C levels were significantly decreased(P<0.05)and HDL-C levels were significantly increased(P<0.05)in the high-dose group.Aque-ous extract of Fritillaria ussuriensis(high dose)significantly increased expression of phosphorylated AMPKα,AMPKα,and phosphorylated ACC in the livers of the model mice(P<0.05),significantly reduced expression of ACC(P<0.05),and significantly increased the relative abundance of the potentially beneficial bacteria Faecalibaculum rodentium,Lacto-bacillus johnsonii,Akkermansia muciniphila(P<0.05).CONCLUSION:Aqueous extract of Fritillaria ussuriensis may ameliorate NAFLD in mice by activating the AMPK/ACC pathway and modulating the structure of intestinal flora.

Patients with severe trauma require an extremely timely treatment and transfusion plays an irreplaceable role in the emergency treatment of such patients. An increasing number of evidence-based medicinal evidences and clinical practices suggest that patients with severe traumatic bleeding benefit from early transfusion of low-titer group O whole blood or hemostatic resuscitation with red blood cells, plasma and platelet of a balanced ratio. However, the current domestic mode of blood supply cannot fully meet the requirements of timely and effective blood transfusion for emergency treatment of patients with severe trauma in clinical practice. In order to solve the key problems in blood supply and blood transfusion strategies for emergency treatment of severe trauma, Branch of Clinical Transfusion Medicine of Chinese Medical Association, Group for Trauma Emergency Care and Multiple Injuries of Trauma Branch of Chinese Medical Association, Young Scholar Group of Disaster Medicine Branch of Chinese Medical Association organized domestic experts of blood transfusion medicine and trauma treatment to jointly formulate Chinese expert consensus on blood support mode and blood transfusion strategies for emergency treatment of severe trauma patients ( version 2024). Based on the evidence-based medical evidence and Delphi method of expert consultation and voting, 10 recommendations were put forward from two aspects of blood support mode and transfusion strategies, aiming to provide a reference for transfusion resuscitation in the emergency treatment of severe trauma and further improve the success rate of treatment of patients with severe trauma.

Objective To understand the current practice status of central venous access device(CVAD)maintenance among intensive care unit(ICU)nurses in secondary and above medical institutions in Shandong province,and to provide a basis for further implementation of effective measures to reduce the incidence of central catheter-related bloodstream infections.Methods The CVAD maintenance practice questionnaire was compiled based on domestic and international evidence related to CVAD maintenance,and a survey was conducted in October 2022 to investigate the status of ICU nurses' CVAD maintenance practice in secondary and above medical institutions in Shandong Province.Results There were 1 492 nurses participated in the survey and 1 461 valid questionnaires were recovered,with a valid recovery rate of 97.92％.The type of CVAD used by the nurses was mainly central venous catheters[92.3％(1349/1461)],and the item with the best assessment at each operation was patency of the catheter[81.1％(1185/1461)],and the worst was the patient's feeling[40.7％(594/1 461)].When assessing catheter patency,[59.8％(873/1 461)]of nurses drew back blood into the catheter.In the use of infusion connectors,three-way connectors[76.0％(1 110/1 461)]and heparin caps[62.3％(910/1 461)]were most frequently used.When sterilizing needleless connectors,most nurses could follow the correct range of disinfection,but the time of disinfection needed to be extended,and the most used items for disinfection were povidone-iodine cotton balls/swabs[44.3％(647/1 461)].The timing of changing infusion connectors needs to be standardized.Most nurses would choose saline for catheter flushing,and the number of nurses choosing saline versus heparinized saline when locking the catheter was about 50％.Most nurses can use correct size syringes and follow standardized techniques for flushing and locking.When performing CVAD maintenance,84.7％(1 237/1 461)of nurses chose a specialized care package kit.The most used skin antiseptic was povidone-iodine[63.7％(931/1 461)].Most nurses could follow the standardized range of skin disinfection,but awareness of drying needs to be improved.Dressings covering puncture points were most frequently transparent[99.7％(1 457/1 461)]and gauze[94.7％(1 383/1 461)],and the frequency of gauze dressing changes needs to be standardized.Hand hygiene and aseptic awareness of nurses during CVAD maintenance was good,but hand hygiene and the timing of wearing sterile gloves need to be standardized.Conclusions ICU nurses' CVAD maintenance practices were generally in line with the latest evidence-based recommendations,but assessment,use of maintenance-related items,and hand hygiene and aseptic technique need to be further standardized.It is recommended that nursing administrators enhance ICU nursing human resource allocation as much as possible and form a central line associated bloodstream infection(CLABSI)prevention and control management system to gradually reduce the morbidity of CLABSI within the ICU.

Objective To understand the current situation of practice and cognition of ICU nurses on intra-abdominal pressure monitoring in tertiary general hospitals in Shandong Province,and to analyze the factors affecting their cognition,so as to provide references for formulating intra-abdominal pressure monitoring standards and procedures,and carrying out targeted training in the future.Methods A convenience sampling method was used,and a self-designed questionnaire on practice and cognition of intra-abdominal pressure monitoring was used to survey ICU nurses from tertiary general hospitals in 16 prefecture-level cities in Shandong Province from September to November 2022.Results A total of 627 valid questionnaires were collected,involving 31 tertiary general hospitals(24 tertiary A hospitals,77.42%;7 tertiary B hospitals,22.58%).The operation rate of intra-abdominal pressure monitoring was low(73.37%),and the main reasons were that they had not received intra-abdominal pressure monitoring related training(61.08%),with only 111(24.94%)nurses choosing the intersection of the mid-axillary line and the iliac crest as the reference zero point measurement,274(61.57%)nurses not taking an reading at the end of expiration.The intra-abdominal pressure monitoring cognition score was 0～16(7.88±2.79)points,and only 5 questions had a correct answer rate of≥50%.Conclusion The standardization of intra-abdominal pressure monitoring practice by ICU nurses in tertiary general hospitals in Shandong Province needs to be strengthened,and their cognition needs further training.It is suggested to unify and implement the standards and procedures of intra-abdominal pressure monitoring,further accelerate the training of intra-abdominal pressure monitoring technology,and improve the standard execution rate and cognitive level of ICU nurses on intra-abdominal pressure monitoring.