By using Doppler sensor and pressure sensor, the cerebrovascular stroke detector can be used to measure the blood flow velocity and blood pressure of the carotid artery. In this study, a variety of signal conversion and isolation processing techniques are proposed for processing and feature extraction of the output signals from the sensors. Finally, effective signal output waveforms that can be used to evaluate the cerebrovascular hemodynamics index (CVHI) are obtained, and the sound signal outputs that can reflect the change characteristics of blood flow velocity and blood pressure signals are generated, which realizes the application functional requirements of the detector.
Blood Flow Velocity/physiology* ; Cerebrovascular Circulation/physiology* ; Hemodynamics/physiology* ; Humans ; Stroke ; Technology

Atherosclerosis(AS)is a chronic inflammatory disease of large and medium-sized arteries that leads to ischemic heart disease,stroke,and peripheral vascular disease.Despite the current treatments,mortality and disability still remain high.Sonodynamic therapy(SDT),a non-invasive and localized methodology,has been developed as a promising new treatment for inhibiting atherosclerotic progression and sta-bilizing plaques.Promising progress has been made through cell and animal assays,as well as clinical trials.For example,the effect of SDT on apoptosis and autophagy of cells in AS,especially macrophages,and the concept of non-lethal SDT has also been proposed.In this review,we summarize the ultrasonic parameters and known sonosensitizers utilized in SDT for AS;we elaborate on SDTs therapeutic effects and mechanisms in terms of macrophages,T lymphocytes,neovascularization,smooth muscle cells,lipid,extracellular matrix and efferocytosis within plaques;additionally,we discuss the safety of SDT.A comprehensive summary of the confirmed effects of SDT on AS is conducted to establish a framework for future researchers.

Objecgive To investigate the HB awareness,the infection rate of HBV and the immunity status among adults at the communities of Wuxi,and to provide some evidences for vaccination strategy.Methods Two communities were enrolled in the study through cluster sampling method.A household survey was conducted to collect subjects' information through a face-to-face interview and blood samples were collected to detect HBsAg,anti-HBs,HBeAg,anti-HBe and anti-HBc.Results 3744 subjects were enrolled in this study.The general knowledge coverage rate of hepatitis B was high and 87.30%respondents claimed that hepatitis B was an infectious disease.The percentage of subjects who got more than 5 scores in persons had got hepatitis B vaccination was 60.18%(239/393),and this was significantly higher than in those without vaccine inoculation(x2=17.07,P＜0.01),with the proportion being 49.49%(1071/2164).rnIe percentage of subjects who got more than 5 scores in persons had family history of HBV infection was 60.00%(318/530),and this wag significantly higher than in those without family history (x2=53.05,P＜0.01),with the proportion of 43.00%(1382/3214).The standardized HBV infection rate was 49.88%.There were 1109(29.62%)subjects whose HBsAg,anti-HBs,HBeAg,anti-HBe and HBcAg were negative.There were 8 subjects(0.21%) whose HBsAg,HBeAg and anti-HBc were positive simultaneously,and there were 133 subjects(3.55%)whose HBsAg,anti-HBe and anti-HBc were positive simultaneously.The positive rate of anti-HBc was significantly higher in males than in females( 59.37%and 53.08%,P=0.00).The positive rates of HBsAg,anti-HBs,HBeAg,anti-HBe and HBcAg were 2.84%,44.05%,0.64%,1.93%,33.44%respectively in 20 year age group,while they were 5.69%,65.85%,0.81%,4.07%,69.44%respectively in 80 year age group.The positive rates of anti-HBs,HBeAg,anti-HBe and HBcAg increased with age(x2trend=256.16,P＜0.001).Among 3744 objects,530 subjects (accounted for 14.16%)had the family history of hepatitis B.HB immunization coverage rate was 11.77% (393/3339),with the standardized rate being 20.20%.The positive conversion rate of anti-HBs among those had HB vaccine inoculation was 21.12%(83/393).Conclusion The infection rate of HBV was high,whereas the immunization rate of hepatitis B vaccine and the level of anti-HBs were low in adults,Thus,to improve the immunization rate of hepatitis B vaccine is a key step to decrease the infection rate.

Objecgive To investigate the HB awareness,the infection rate of HBV and the immunity status among adults at the communities of Wuxi,and to provide some evidences for vaccination strategy.Methods Two communities were enrolled in the study through cluster sampling method.A household survey was conducted to collect subjects' information through a face-to-face interview and blood samples were collected to detect HBsAg,anti-HBs,HBeAg,anti-HBe and anti-HBc.Results 3744 subjects were enrolled in this study.The general knowledge coverage rate of hepatitis B was high and 87.30%respondents claimed that hepatitis B was an infectious disease.The percentage of subjects who got more than 5 scores in persons had got hepatitis B vaccination was 60.18%(239/393),and this was significantly higher than in those without vaccine inoculation(x2=17.07,P＜0.01),with the proportion being 49.49%(1071/2164).rnIe percentage of subjects who got more than 5 scores in persons had family history of HBV infection was 60.00%(318/530),and this wag significantly higher than in those without family history (x2=53.05,P＜0.01),with the proportion of 43.00%(1382/3214).The standardized HBV infection rate was 49.88%.There were 1109(29.62%)subjects whose HBsAg,anti-HBs,HBeAg,anti-HBe and HBcAg were negative.There were 8 subjects(0.21%) whose HBsAg,HBeAg and anti-HBc were positive simultaneously,and there were 133 subjects(3.55%)whose HBsAg,anti-HBe and anti-HBc were positive simultaneously.The positive rate of anti-HBc was significantly higher in males than in females( 59.37%and 53.08%,P=0.00).The positive rates of HBsAg,anti-HBs,HBeAg,anti-HBe and HBcAg were 2.84%,44.05%,0.64%,1.93%,33.44%respectively in 20 year age group,while they were 5.69%,65.85%,0.81%,4.07%,69.44%respectively in 80 year age group.The positive rates of anti-HBs,HBeAg,anti-HBe and HBcAg increased with age(x2trend=256.16,P＜0.001).Among 3744 objects,530 subjects (accounted for 14.16%)had the family history of hepatitis B.HB immunization coverage rate was 11.77% (393/3339),with the standardized rate being 20.20%.The positive conversion rate of anti-HBs among those had HB vaccine inoculation was 21.12%(83/393).Conclusion The infection rate of HBV was high,whereas the immunization rate of hepatitis B vaccine and the level of anti-HBs were low in adults,Thus,to improve the immunization rate of hepatitis B vaccine is a key step to decrease the infection rate.

OBJECTIVE: To investigate the mental health status and its influencing factors among general population and healthcare professionals in Guangdong Province during COVID-19 pandemic. METHODS: A online questionnaire-based survey was conducted from March 11st to March 15th, 2020.The questionnaire consisted of 4 parts to survey the participants'basic information, understanding of COVID-19 outbreak-associated information, cognition of COVID-19 pandemic and status of anxiety and depression.A total of 1433 valid responses were collected, including 706 from the general population and 727 from healthcare professionals.Cronbach's α coefficient and exploratory factor analysis were used for reliability and validity assessment.Chi-square, Wilcoxon and Kruskal-Wallis test were used for univariate analysis and ordinal or nominal logistic regression was used for multivariate analysis of the data. RESULTS: There was no significant difference between the general population and the healthcare professionals in terms of anxiety, depression and cognition of COVID-19 outbreak after adjustment for demographic variables, but the levels of anxiety and depression of these participants were both higher than those before the pandemic.In the participants from the general population, multivariate logistic regressions showed an OR for anxiety of 1.93(1.18, 3.17) among those who spent 1-2 h a day in reading COVID-19-related news, while those who spent over 3 h had an OR value for anxiety of 1.88(1.14, 3.11);the unmarried individuals had a depression OR of 2.19(1.51, 3.18). Inaccurate cognition of COVID-19 outbreak was positive correlated with the occurrence of anxiety and depression.Unmarried individuals and those with higher educational levels had better cognition of COVID-19 outbreak.Among the healthcare professionals, multivariate logistic regressions suggested that insufficient rest time and worries about contracting the virus contributed to the occurrence of anxiety and depression.Among the nursing staff, the OR of obvious depression was 2.99(1.45, 6.18).Compared to healthcare professionals not working in designated hospital for COVID-19, those who work in the designated hospitals had ORs for obvious and severe depression of 0.48(0.25, 0.93) and 0.39(0.17, 0.89), respectively.Concerns over contracting the virus increased the possibility of incorrect cognition of COVID-19. CONCLUSIONS Psychological interventions are essential for both the general population and healthcare professionals, especially for unmarried individuals in the general population and the nursing staff.An excessive exposure to COVID-19-related information may have detrimental effects on the mental health.For healthcare professionals, sufficient rest needs to be ensured, and education programs on COVID-19 should be implemented among both residents and healthcare professionals to improve their mental health.
Anxiety/epidemiology* ; Betacoronavirus ; COVID-19 ; China/epidemiology* ; Coronavirus Infections ; Health Status ; Humans ; Pandemics ; Pneumonia, Viral ; Reproducibility of Results ; SARS-CoV-2

Enzyme-catalysis self-assembled oligopeptide hydrogel holds great interest in drug delivery, which has merits of biocompatibility, biodegradability and mild gelation conditions. However, its application for protein delivery is greatly limited by inevitable degradation of enzyme on the encapsulated proteins leading to loss of protein activity. Moreover, for the intracellularly acted proteins, cell membrane as a primary barrier hinders the transmembrane delivery of proteins. The internalized proteins also suffer from acidic and enzymatic degradation in endosomes and lysosomes. We herein develop a protease-manipulated hybrid nanogel/nanofiber hydrogel for localized delivery of intracellularly acted proteins. The embedded polymeric nanogels (CytoC/aNGs) preserve activity of cytochrome