Purpose To investigate the effect of shortening the acquisition time of 18F-D6-AV133 PET/CT on image quality and diagnostic efficacy in Parkinson's disease.Materials and Methods A total of 51 participants(27 of Parkinson's disease,24 of healthy-controls)from the First Affiliated Hospital of Guangzhou Medical University from October 2021 to June 2022 were retrospectively selected.Images were obtained after the injection of the tracer 18F-D6-AV133(371.04±16.30)MBq for 60 min,with collection times of 10 min.Four sets of images were reconstructed using CT attenuation correction with acquisition times of 3,5,7 and 10 min.Semi-quantitative analysis was performed on the PET images,calculating the striatum-to-occipital lobe standardized uptake value ratio(SUVR).Two physicians independently conducted qualitative evaluations for each image group.The differences of SUVR and visual score results among four sets of images were performed.The optimal critical value of SUVR was obtained by analyzing the receiver operating characteristic curve of the subjects.Results The visual analysis of image quality had a strong consistency between the two doctors(ICC=0.853,P<0.001).The images with acquisition time of 5 min could reach the common quality level in clinical work,accounting for 78.4%(40/51).The semi-quantitative results of image quality showed that there was no significant difference between SUVR and diagnostic efficiency obtained by acquisition time 5 min and 10 min(Z=1.821,P=0.069),and the best critical value of the two groups was equal to 3.Therefore,properly shortening the acquisition time had no effect on the diagnosis of Parkinson's disease.Conclusion With the development and advancement of technical equipment,PET image quality is gradually improving and the scanning time is also gradually shortening.The acquisition time for 18F-D6-AV133 can be shortened from the conventional 10 min to 5 min.

Carotid atherosclerotic plaque is the main cause of ischemic stroke. In recent years, with the continuous innovation of novel imaging technologies, numerous classification standards for carotid plaques provide more powerful evidence for the features of carotid plaques and perioperative vascular assessment, as well as the reference for surgeons in choosing therapeutic decisions. Ultrasound is the preferred non-invasive and convenient screening tool for carotid stenosis. Invasive examinations such as CT angiography and magnetic resonance angiography are suitable for carotid stenosis patients to determine the plaque composition and stability, which can guide surgical decision-making and help to prevent serious cardiovascular and cerebrovascular adverse events. Advances in the treatment of carotid artery stenosis have focused on the improvement and innovation of vascular interventional devices and surgical procedures, including double-layer stents, coated stents and transcarotid artery revascularization. As technology continues to evolve, molecular imaging and more minimally invasive screening as well as therapies will be the way forward.

Carotid atherosclerotic plaque is the main cause of ischemic stroke. In recent years, with the continuous innovation of novel imaging technologies, numerous classification standards for carotid plaques provide more powerful evidence for the features of carotid plaques and perioperative vascular assessment, as well as the reference for surgeons in choosing therapeutic decisions. Ultrasound is the preferred non-invasive and convenient screening tool for carotid stenosis. Invasive examinations such as CT angiography and magnetic resonance angiography are suitable for carotid stenosis patients to determine the plaque composition and stability, which can guide surgical decision-making and help to prevent serious cardiovascular and cerebrovascular adverse events. Advances in the treatment of carotid artery stenosis have focused on the improvement and innovation of vascular interventional devices and surgical procedures, including double-layer stents, coated stents and transcarotid artery revascularization. As technology continues to evolve, molecular imaging and more minimally invasive screening as well as therapies will be the way forward.

Objective To explore the mechanism by which Sestrin2(SESN2)regulates autophagy activity of chondrocytes by mediating mammalian rapamycin target protein complex 1(mTORC1)signaling pathway.Methods The normal chondrocytes were treated with interleukin-1 β(IL-1β)to establish an osteoarthritis(OA)chondrocyte model,which was divided into the control group and the IL-1 β-treated group.Real-time quantitative PCR(qPCR)and Western blot were used to detect the expression levels of matrix metalloproteinase 13(MMP13),type Ⅱ collagen(COL2A1)and SESN2 in the two groups.The cell models of the chondrocyte overexpression SESN2 group and knockdown SESN2 group were obtained via cell transfection technology,and the expression levels of SESN2 in each group were detected by qPCR while those of SESN2,MMP13,COL2A1,mTORC1 pathway-related proteins and autophagy-related proteins in each group were detected by Western blot.The effects of SESN2 on cell proliferation and migration were detected by CCK-8 and cell scratch assay.Results(1)The expression level of MMP13 in the IL-1 β-treated group was significantly up-regulated,while the expression levels of COL2A1 and SESN2 were significantly decreased.(2)Compared with the control group,the expressions of p-mTORC1,ribosomal protein S6 kinase 1(S6K1),and MMP13 protein in OA chondrocytes in the overexpression group were significantly down-regulated,while the expressions of adenosine 5'-monophosphate(AMP)-activated protein kinase(AMPK)and chondroprotective gene COL2A1 were significantly increased,and the expression level of Beclin-1 and the ratio of microtubule associated protein 1 light chain 3-Ⅱ(LC3-Ⅱ)/(LC3-Ⅰ)were increased.Meanwhile,overexpression of SESN2 could up-regulate the proliferation and migration of chondrocytes,but the results were opposite after knockdown of SESN2.Conclusion SESN2 can enhance autophagy,proliferation and migration of chondrocytes by inhibiting mTORC1 pathway,which has provided data for revealing the pathogenesis of OA and exploring new therapeutic methods.

Objective:To explore the application effect of flipped classroom model based on Simodont dental training system in the standardized training teaching of prosthodontics.Methods:The control experiment was used in this study. Seventy two students from Batch 2018 and Batch 2019 of Stomatology Hospital of Air Force Medical University were selected and randomly divided into experimental group (flipped classroom model based on Simodont dental training system) and control group (Simodont dental training system training mode after traditional teaching), with 18 students every academic year in each group. Questionnaire survey was conducted to evaluate the teaching effect, and the results of after-class theory test and practical computer test were compared between the two groups. SPSS 20.0 was used for chi-square test and t test. Results:The experimental group was better than the control group in enhancing classroom interest, improving the ability of independent analysis and problem-solving, and cultivating the ability of cooperation and expression ( P<0.05). The scores of after-class theory test and practical computer test in the experimental group [(23.36±0.21) points and (90.56±0.52) points] were significantly better than those in the control group[(21.81±0.25) points and (88.31±0.48) points] ( P<0.01). Conclusion:The flipped classroom model based on Simodont dental training system can effectively improve the effect of standardized training and teaching of professional skills in prosthodontics. At the same time, the students' ability of independent analysis and problem solving, cooperation and communication and expression are effectively improved.

Objective To evaluate the effects of different concentrations of desflurane on the electrophysiological stability of hearts in female patients.Methods Forty female patients,of American Society of Anesthesiologists physical status Ⅰ or Ⅱ,aged 20-50 yr,weighing 45-77 kg,scheduled for elective surgery with general anesthesia,were divided into 2 groups (n =20 each) using a random number table method:0.6 MAC group (group D1) and 1.3 MAC group (group D2).The intravenous access was opened after admission to the operating room,midazolam 0.1 mg/kg,vecuronium 0.1 mg/kg,fentanyl 3 μg/kg and etomidate 0.3 mg/kg were injected intravenously,and mechanical ventilation was performed after tracheal intubation.The concentrations of desflurane reached 0.6 and 1.3 MAC in D1 and D2 groups,respectively.Twelve-lead electrocardiograms were collected before anesthesia induction (T1),at 5 min after intubation (T2) and at 20 min after reaching the set concentration of desflurane (T3).The QT interval and Tpe interval were measured,the QTc interval,Tp-e/QT ratio and index of cardiac electrophysiological balance were calculated,and the development of arrhythmia was also observed.Results The QT interval and QTc interval were significantly longer,and the Tp-e/QT ratio was lower at T3 than at T1,2 in two groups (P＜ 0.05).There was no significant difference in QT interval,Tp-e/QT ratio or index of cardiac electrophysiological balance at each time point between two groups (P＞0.05).No arrhythmia was found in neither group.Conclusion The clinical concentration of desflurane affects the electrophysiological stability of hearts to some extent in female patients without causing arrhythmia.

Gonadotropin-releasing hormone (GnRH) plays an important role in the process of reproduction. Studies have shown that a family of peptides Kisspeptin can act on GnRH-related neurons, stimulating the secretion of GnRH, and activating the hypothalamic-pituitary-gonadal axis. Both animal experiments and clinical studies have shown that exogenous administration of Kisspeptin is able to induce physiological GnRH release in healthy individuals and those with endocrine-disorders, which brings great hope for treatment of reproductive endocrine diseases. The effect of Kisspeptin is similar to the physiological process in induction of ovulation and ovum maturation, leading to high security and efficiency for women receivingfertilization. Kisspeptin is involved in trophoblast invasion, so it may be useful for predicting pregnancy outcomes. In addition, Kisspeptin is the key hormone in the onset of puberty acting as a signal transducer in metabolism and reproduction, so it provides some directions for studies of polycystic ovary syndrome, hyperprolactinemia, and other metabolic-related reproductive endocrine diseases. This article reviews the character of Kisspeptin and the prospect of its application in treatment of reproductive endocrine diseases.

Objective To study the clinical significance of thromboelastography (TEG) for determining the presence of coagulation disorders in septic children.Methods A total of 100 patients suffering from sepsis or severe sepsis in pediatric intensive care unit (PICU) of Shanghai Children's Medical Center from February 2014 to January 2015 were recruited.TEG tests and conventional coagulation laboratory tests (CCTs) including platelet count,fibrinogen,prothrombin time (PT),activated partial thromboplastin time,D-dimers,and international normalized ratio (INR) were carried out in all patients at the primary diagnosis of sepsis.Another 25 healthy children taking physical examination were enrolled as control group.Rank Sum Test was used to detect the differences in coagulation markers and TEG between the groups and there was statistical significance when P ＜ 0.05.Receiver operating characteristic (ROC) curves were used to evaluate the roles of TEG and CCTs tests in this study.Results Of them,there were 56 patients with sepsis and 44 with severe sepsis.The male to female ratio was 63∶ 37,the median age was 11.5 (3.3-48) months,and 71％ patients suffered from underlying disease.According to TEG,72 patients had coagulation disorders,including 28 with hypercoagulation and 44 with hypocoagulation.CCTs tests showed 50 patients had coagulation disorders,including 29 with non-overt DIC and 21 with overt DIC.The rate of hypercoagulability was significantly higher in non-DIC group than in non-overt DIC group (46％vs.17.2％,P =0.016).The rate of hypocoagulability was significantly higher in overt DIC group than in non-overt DIC group (100％ vs.44.8％,P ＜ 0.01).Patients with hypercoagulation disorders had significantly shorter R (coagulation reaction time) and K (coagulation formation time) and greater α (angle α),MA (maximal amplitude) and CI (comprehensive coagulation index) compared with control group (P ＜ 0.01).According to CCTs results,patients with hypercoagulation had significantly prolonged PT compared with control group (P =0.002).Compared with sepsis group,severe sepsis group had significantly prolonged R and K and lower α,MA and CI (P ＜ 0.01).ROC analysis demonstrated that area under the curve (AUC) of TEG and CCTs variables for diagnosis of severe sepsis were significantly greater than 0.5.Both variables of α (P =0.000 2) and K (P =0.004 1) had significantly greater AUCs compared with Fib.Conclusions There were 72％ septic patients with coagulation disorders.The hypercoagulability occurred earlier in patients with sepsis and the hypocoagulability occurred later in patients with severe sepsis.The TEG may provide important information for clinicians to deal with coagulation disorders in septic children.

Objective To establish a standardized and feasible family health assessment index system based on the family practice system in Shanghai urban communities.Methods On the basis of literature review and special topic discussion, a preliminary index system framework was developed and an expert consultation questionnaire was compiled.Twenty one experts of general practice, medical specialties, health administration and public health management were invited and two rounds of improved Delphi expert consultation were conducted.The results of statistical analysis were summarized and the evaluation index system was established.Results The evaluation index system included 5 first-level indicators, 17 second-level indicators and 63 third-level indicators.The weight coefficients of first-level indicators in basic information, family structure, family function, family resources and health status of the family members were 0.199 6, 0.197 5, 0.201 7, 0.185 0, 0.216 2, respectively.In the two rounds of consultation, the positive coefficient of experts was both 100%, the degree of expert authority was 0.867 and 0.880, and the coordination coefficient was 0.294 and 0.415, respectively (P<0.05).The operational coordination coefficients were 0.320 and 0.402 (P<0.05), respectively.Conclusion The family health assessment index system constructed by the Delphi expert consultation method can provide reference for family doctors to carry out family health assessment in urban communities.

On the basis of analysis of the current status and future tendency of development of the health services industry in Shanghai,the authors identified key problems and bottlenecks.Thus they made clear the target positioning and principles of the industry,and proposed the basic ideas and pattern of the industry in the 13 th five-year plan period,focusing on such fields as private and high-end healthcare services,traditional Chinese medicine services,public health services,commercial health insurance,and other related industries.In the end,corresponding supporting polices were proposed.