Objective To assess the effects of limited hepatectomy on liver regeneration and function recovery of cirrhotic animal model.Methods Cirrhotic rat models were first prepared by intraperitoneal injection of CCL4.After that,the cirrhotic animal models underwent 20％ hepatectomy (n =30).The cirrhotic animals that underwent sham operation (n =30) and normal animals that underwent 20％ hepatectomy (n =30) were used as control groups.From the time when cirrhotic models were prepared to 3 months after 20％ hepatectomy,the hepatic function,coagulation function were tested regularly.Western blotting and real-time PCR were carried out to test the protein and gene expression of TGF-β,HGF and PCNA.Results Hepatic fibrosis and cirrhosis were observed during the preparation of cirrhotic rat models by intraperitoneal injection of CCL4.The hepatic function and coagulation function of cirrhotic models were partly recovered 3 month after 20％ hepatectomy.The gene and protein expression levels of TGF-β in the liver of animal model get higher during the preparation of cirrhotic rat models.However,the gene and protein expression levels of TGF-β get lower in cirrhotic model undergoing 20％ hepatectomy,when compared with that in cirrhotic animals (sham operation) and normal animals (20％ hepatectomy).Furthermore,the gene and protein expression levels of HGF and PCNA get higher in cirrhotic model undergoing 20％ hepatectomy,when compared with that in cirrhotic animals (sham operation) and normal animals (20％ hepatectomy).Conclusions Experimental limited hepatectomy facilitates the liver regeneration and function recovery of cirrhotic animal model,which may provide a novel method for the prevention and treatment of cirrhosis using limited hepatectomy technique.

Objective: To study the effect of ultrasonic guidance in radial artery catheterization. Methods: From January 2017 to January 2018, 100 patients who received surgical treatment in Taizhou Central Hospital of Zhejiang Province and needed puncture and catheterization anesthesia during operation were randomly divided into control group (n=50) and observation group (n=50) according to digital table method.The control group adopted the traditional touch pulse method, while the observation group was guided by ultrasound.The first puncture success rate, the second puncture success rate, puncture time, puncture times, the vital sign index, incidence of adverse events, pain score, comfort score were compared between the two groups. Results: The first puncture success rate (80%) and the second puncture success rate (100%) of the observation group were higher than 62% and 88% of the control group (χ²=3.934, 6.383, all P<0.05). The single puncture time [(59.85±8.31)s] and total puncture time [(107.14±35.37)s] of the observation group were shorter than those of the control group (t=5.766, 6.398, all P<0.05), and the puncture times [(1.27±0.54) times] of the observation group was less than that of the control group (t=5.689, P<0.05). After puncture, the heart rate [(73.79±2.46)times/min] and average arterial pressure [(96.75±6.76)mmHg] of the observation group were all lower than those of the control group (t=5.058, 4.635, all P<0.05). The total incidence of adverse events such as subcutaneous hematoma and arterial wall penetration in the observation group (4%) was lower than that in the control group (18%) (χ²=5.005, P<0.05). The pain scores at puncture and after puncture of the observation group [(1.53±0.71)points, (1.28±0.60)points] were lower than those of the control group (t=5.545, 6.233, all P<0.05). The comfort scores at puncture and after puncture of the observation group [(91.25±9.64)points, (97.31±11.37)points] were higher than those of the control group (t=6.147, 6.226, all P<0.05). Conclusion Ultrasonic guidance can effectively improve the puncture efficiency, reduce the fluctuation of vital signs, pain, reduce the adverse events during puncture, and make the patients feel more comfortable.

The article intends to analyze the software safety problems in high-risk medical devices based on the investigation of software R & D Quality control procedures in Shanghai medical device manufacturing enterprises. The idea of improving the software pre-market safety evaluation method in China is also explored through the way of comparing those in U.S. and Europe.
China ; Equipment Safety ; methods ; Europe ; Quality Control ; Safety Management ; methods ; Software ; United States

The widespread application of next generation sequencing (NGS) in clinical settings has enabled testing, diagnosis, treatment and prevention of genetic diseases. However, many issues have arisen in the meanwhile. One of the most pressing issues is the lack of standards for reporting genetic test results across different service providers. The First Forum on Standards and Specifications for Clinical Genetic Testing was held to address the issue in Shenzhen, China, on October 28, 2017. Participants, including geneticists, clinicians, and representatives of genetic testing service providers, discussed problems of clinical genetic testing services across in China and shared opinions on principles, challenges, and standards for reporting clinical genetic test results. Here we summarize expert opinions presented at the seminar and report the consensus, which will serve as a basis for the development of standards and guidelines for reporting of clinical genetic testing results, in order to promote the standardization and regulation of genetic testing services in China.