Correlation between nonlinear subharmonic scattering of ultrasound contrast agent microbubbles and ambient pressure is expected to be used for local brain tissue pressure monitoring. Although high-frequency ultrasound has achieved high-resolution imaging of intracranial microvessels, the research on high-frequency subharmonic scattering characteristics of microbubbles is insufficient at present, which restricts the research progress of estimating local brain tissue pressure based on high-frequency subharmonic scattering of microbubbles. Therefore, under the excitation of 10 MHz high-frequency ultrasound, the effects of different acoustic pressures and ambient pressures on the high-frequency subharmonic scattering characteristics of three different ultrasound contrast agents including SonoVue, Sonazoid and Huashengxian were investigated in this in vitro study. Results showed that the subharmonic scattering amplitudes of the three microbubbles increased with the increase of ambient pressure at the peak negative acoustic pressures of 696, 766 and 817 kPa, and there was a favorable linear correlation between subharmonic amplitude and ambient pressure. Under the above three acoustic pressures, the highest correlation coefficient of SonoVue was 0.948 ( P = 0.03), the highest sensitivity of pressure measurement was 0.248 dB/mm Hg and the minimum root mean square error (RMSE) was 2.64 mm Hg. Sonazoid's highest correlation coefficient was 0.982 ( P < 0.01), the highest sensitivity of pressure measurement was 0.052 dB/mm Hg and the minimum RMSE was 1.51 mm Hg. The highest correlation coefficient of Huashengxian was 0.969 ( P = 0.02), the highest sensitivity of pressure measurement was 0.098 dB/mm Hg and the minimum RMSE was 2.00 mm Hg. The above in vitro experimental results indicate that by selecting ultrasound contrast agent microbubbles and optimizing acoustic pressure, the correlation between high-frequency subharmonic scattering of microbubbles and ambient pressure can be improved, the sensitivity of pressure measurement can be upgraded, and the measurement error can be reduced to meet the clinical demand for local brain tissue pressure measurement, which provided an important experimental basis for subsequent research in vivo.
Contrast Media ; Microbubbles ; Ultrasonography/methods*

Objective:To explore the ethical review questions of CRISPR/Cas9 gene editing technology caused in clinical research,and thus to provide a reference for matters needing attention of the ethical review involved in this technology in clinical.Methods:This paper summarized the ethical problems of CRISPR/Cas9 gene editing technology at home and abroad,analyzed the reasons and put forward some suggestions for the application of new technology in line with China's national conditions.Results:It should allow CRISPR/Cas9 gene editing technology to be applied in somatic cell gene therapy,forbidden for genital gene therapy and not considered to enhance.Since CRISPR/Cas9 lack clear subject of responsibility ethics,it brings security,conflict of rights and social equality issues.The measures that need to be taken include the strengthening of cultural communication,the formation of ethic forms of gene editing technology,the establishment of independent ethical review body at national's level,the improvement of legal norms,the formulating of technical standards and ethical principles and the major support to gene editing research field at the national level.Conclusion:In view of the potential clinical application of CRISPR/Cas9,our country should progressively restrictively develop the embryonic gene editing techniques from the prohibition.The ethics committee is responsible for the ethical review and supervision of clinical research.Members of the ethics committee and ethical staff should strengthen the study of new knowledge,strictly docking policies and regulations from accepting the clinical research projects involving CRISPR / Cas9 to ethical review,and thus to ensure the effectively review the ethical problems of genetic editing technology project.

Objective To explore the impact of biological big data on clinical study management.Methods To understand the changeof clinical study resulted from big data from the perspectiveof scientific study management.Results Bigdata Clinical Trial (BCT) based on massive clinical study data will turn out to be one of the most important parts of clinical study gradually.General rules target population will be obtained from clinical study model of the whole population.Reality fact will be more closely approached by the results of study on macro factors.Precise trend of dynamic changes can be demonstrated via data of full time linear tracking studies.Data collection will include those unordered data which are potentially inaccurate andregarded as useless in small data time.Conclusions Revolutionary changes will be presented in clinical study model in which data acquisition and info analysis are used as the primary approaches in big data era,and prediction of clinical study developmenttrend based on big data as well as innovation of management model for clinical study will make power ful support for better utilization of big data tools and accomplishment for big data realization and precision technology.

Objective:To summarize the opportunities,challenges and countermeasures that China Food and Drug Administration (CFDA) joining ICH-GCP will bring to the construction of ethics committee,so as to provide reference for the standardization construction and review ability of ethical committee in China.Methods:We reviewed and comprehensively analyzed the domestic literatures about the requirement for ethics committee after CF-DA join ICH-GCP.Results:CFDA joining ICH-GCP was conducive to speeding up the construction of Chinese ethics committee.Aiming at the challenge of the standardization construction of ethics committee,it could use the revised policy regulations and guidelines to integrate with ICH-GCP,establish ethics certification system in line with the national condition,clear the composition of members,standardize operational procedures,and establish regional ethics committee and leader the review of the unit system;to improve the review ability,it could strengthen reviewing requirement from the aspects of sponsor responsibilities,researchers qualification,research protocols,informed consent,researcher brochures and documents management.Conclusion:CFDA joining ICH-GCP brings a rapid development opportunity for the ethics committee as well as challenges.We can solve problems from standardization construction and the improvement of review ability,to speed up the construction of ethics committee that meets the requirements of ICH-GCP.

Medical research has entered the era of mega-science.The multidisciplinary collaboration has attracted great attention.besides studies on genes and the environment interaction,multidisciplinary research between natural sciences has received widespread recognition.However muhidisciplinary researches on the interaction between the gene and social factors or behavioral factors on health science deserve more emphasis.This article described development of multidisciplinary research and its features;analyzed importants of conducting multidisciplinary research between natural and social disciplines,and finally provided suggestions on research organization reform in order to promote the multidisciplinary research.

Global health arisen recently, but it developed rapidly and attracted great attention from global researchers and institutions. China, as a member of United Nation, actively participated in many international peacekeeping activities. Health of peacekeepers is global health and it is important to consider and dealt with health of peacekeepers with conception of global health. This article reviewed and analyzed health problems and risk factors faced by peacekeepers,and provided suggestions to strategies to protect health of peacekeepers.
China ; Global Health ; Health ; Humans ; Military Personnel ; Risk Factors

Translational research in public health (TRPH) increasingly attracted attention. Focus of TRPH is not only patients, it also emphasizes to promote health for all society and whole population. Therefore, TRPH is more complicated, involves multi-disciplines and multi-sectors. This paper analyzed the conception, features of TRPH, and challenges faced by research organization of public health.
Humans ; Public Health ; Translational Medical Research

Translational research in public health (TRPH) increasingly attracted attention. Focus of TRPH is not only patients, it also emphasizes to promote health for all society and whole population. Therefore, TRPH is more complicated, involves multi?disciplines and multi?sectors. This paper analyzed the conception, features of TRPH, and challenges faced by research organization of public health.

Translational research in public health (TRPH) increasingly attracted attention. Focus of TRPH is not only patients, it also emphasizes to promote health for all society and whole population. Therefore, TRPH is more complicated, involves multi?disciplines and multi?sectors. This paper analyzed the conception, features of TRPH, and challenges faced by research organization of public health.

Nursing had a long history over thousands of years which developed from ancient saying better bid the cooks than the medicine,disease-centered and patient centered tohealth-centered clinical nursing.In order to promote quality of clinical nursing,it need innovation by introducing translational medicine into nursing.This paper analyzed how to integrate translational medicine into clinic nursing and explore nursing model based on translational medicine.