Objective To assess the risk of malnutrition in elder home-care patients through mini nutritional assessment (MNA) and study the correlations between total MNA score and 18 individual questions in this patient group.Methods In May 2011,62 elder home-care patients from our center answered the MNA questionnaire.And the results were used to analyze the correlations between total MNA score and individual questions and the correlations among MNA classifications and body mass index(BMI),mid-arm muscle circumference (MAMC) and calf circunference (CC).Results According to MNA,18％ were malnourished ( 11/62 ),47％ at risk of malnutrition ( 29/62 ) and 35％ well-nourished ( 22/62 ) ; BMI,independence,mobility,neuropsychological problems,ingesting method,MAMC,CC and selfperceived nutritional status,self-perceived health status showed strong correlations with total MNA score (0.601,0.600,0.666,0.611,0.627,0.618,0.726,0.612,0.672,P ＜0.05).And weight loss within a month,number of daily meals and intake of drinks showed weak correlations with total MNA score (0.35,0.319,0.288,P ＜ 0.05 ).Positive correlations existed among MNA classifications and BMI,MAMC,CC (15.45,19.85,31.89,P＜0.05).Conclusions The elder home-care patients have a high risk for malnutrition.Half of 18 individual questions are strongly correlated with total MNA score in this patient group.

This article introduces the clinical requests of indigenous diagnostic imaging ultrasound devices in first-time registration application and the clinical trial requests in Technical Review Guidance of Ultrasound Imaging Diagnostic Devices (category III) Registration and puts forward some questions of the guidance's implementation. It is hoped to help concerned people.
China ; Clinical Trials as Topic ; standards ; Device Approval ; legislation & jurisprudence ; standards ; Guidelines as Topic ; Ultrasonography ; instrumentation

Continuing medical education refers to the completion of basic medical education for inservice education,which is to guarantee the sustainable development of physicians in clinical and scientific research ability,and is the essential means to safeguard and improve the level of medical treatment.Traditional continuing medical education is given priority to the form of regularly organize workshops,so it has some limitations to oral and maxillofacial surgery.MOOC teaching is a kind of large-scale open new online teaching mode.This study provides an overview of the MOOC development,characteristics and development situation in the medical teaching.The necessity and feasibility of MOOC based teaching protocol in oral and maxillofacial surgery continuing medical education has been discussed.And curriculum transformation,construction of education model and possible challenges have also been analyzed and discussed in this paper.

In this paper, the domestic and international demand and development trend of clinical diagnostic radionuclides are analyzed, and the medium and high-energy cyclotrons, adequate and systematic facilities, and preparation techniques required for the production of medical radionuclides based on solid targets are introduced. This paper focuses on the research and development carried out by some important medical institutions and scientific research institutes in China over the years in the aspects of medium and high-energy cyclotrons, beam transmission lines, high-power irradiation target stations and new medical isotope production processes etc. It also looks forward to some new directions for the development of medical radionuclides in China during the 14th Five-Year Plan period.