1.A retrospective analysis of 1028 adverse events of medical device reports.
Chinese Journal of Medical Instrumentation 2013;37(6):447-450
OBJECTIVETo provide suggestion for MDAEs monitoring with analyzing the features of the 1028 reports of MDAEs.
METHODSWith retrospective case study, this paper analyzed 1 028 MDAE reports in Guiyang during 2012.
RESULTSThe intrauterine device (IUD) caused the higher proportion of adverse events with serious degree. Monitoring consciousness of grassroots users needs to be improved. The quality of the reports should be enhanced.
CONCLUSIONSMore attention should be paid to monitoring on IUD. The level of MDAEs monitoring should be improved through carrying out targeted training and publicity, establishing and improving MDAEs monitoring network.
Equipment Safety ; Intrauterine Devices ; adverse effects ; Product Surveillance, Postmarketing ; Retrospective Studies
5.Advances in Research on Hepatitis B Virus DNA Integration
Virologica Sinica 2008;23(2):93-99
Since HBV DNA integration was discovered for the first time in 1980, various methods have been used to detect and study it, such as Southern Blot, in situ hybridization, polymerase chain reaction and so on. HBV DNA integration is thought to be random on the whole although some hot spots of integration were described by some researchers, one of which might be the repetitive sequences of the genomic DNA. Besides, DNA damage, especially double-strand breaks could promote HBV DNA integration into host genome. HBV DNA integration into cells may damage the stability of the genome, cause DNA rearrangement, promote DNA deletion and induce the formation of HCC.
6.The progress of low-dose chemotherapy in neuroblastoma
International Journal of Pediatrics 2012;39(3):301-303
Low-dose chemotherapy is concerned in treating malignant tumor in recent years.The lowdose,metronomic chemotherapy is not only effective in antiangiogenic,but also avoid chemotherapy side effects,such as suppression of bone marrow,dysfunction of liver and kidney,gastrointestinal reaction and drug resistance.Thereby it can increase patient compliance,improve life quality and prolong survival time.Currently chemotherapy in neuroblastoma still plays a key role,especially low-dose chemotherapy,which can protect self-immune function and reduce the physical injury in children.
9.Personal computer aided mapping and measurement of cerebral perfusion with dynamic CT
Chinese Journal of Radiology 2001;0(01):-
Objective To intruduce a method of making cerebral perfusion mapping and measurement using dynamic CT with a personal computer. Methods We generated the cerebral perfusion mapping and measurement from a series dynamic CT images with a personal computer. The theoretic basis of our technique is central volume principle. The application software was made using visual C++ language with Windows 98 platform. Results This method was applied to a case of transient ischemic attack (TIA). The cerebral perfusion mapping contributed to display the abnormal area of ischemia, which showed as normal imaging appearances in routine CT and MR images. Conclusion Personal computer aided mapping and measurement of cerebral perfusion with dynamic CT is a simple and accessible technique for delineating the hemodynamic response, including abnormal regional cerebral blood flow, blood volume, mean transit time, and time to peak in cases of hyperacute ischemic stroke which was viewed as normal imaging findings in routine CT and MR examination. This method is more suitable to examine emergency cases than MR perfusion imaging and may be used in any facility where CT scanner and personal computer are available.
10.CT perfusion imaging and stages of regional cerebral hypoperfusion in pre-infarction period
Chinese Journal of Radiology 1999;0(10):-
Objective To investigate the applicative value in stages of pre-infarction period using dynamic perfusion CT. Methods Dynamic perfusion CT was performed in 32 cases of cerebral hypoperfusion. The ratios of side-to-side were measured at hypoperfusion areas in the regional cerebral ischemia. The stages of pre-infarction period were made as the following: (Ⅰ 1) TTP was delayed, MTT, rCBF and rCBV were normal; (Ⅰ 2) TTP and MTT were delayed, rCBF was normal, and rCBV was normal or slightly increased; (Ⅱ 1) TTP and MTT were delayed, rCBF was decreased, and rCBV was normal or slightly decreased; (Ⅱ 2) TTP and MTT were delayed, rCBF and rCBV were decreased. Results There were 4 cases in stage Ⅰ 1. Regional hypoperfusion was revealed only by TTP map. The mean ratios of rCBF, rCBV, MTT, and TTP were 1.00, 1.00, 1.00, and 1.30, respectively. In stage Ⅰ 2, the areas of delayed TTP and MTT were found in all 13 cases. The rCBF and rCBV maps appeared normal in 8 cases. Another 5 cases showed normal rCBF and slightly increased rCBV areas. The mean ratios of rCBF, rCBV, MTT, and TTP were 1.00, 1.03, 1.38, and 1.30, respectively. In stage Ⅱ 1, the areas of delayed TTP and MTT were revealed in all 8 cases. The depiction of decreased rCBF was also found in 8 cases. The areas of decreased rCBV were showed in 5 cases, and normal rCBV maps were revealed in 3. The mean ratios of rCBF, rCBV, MTT, and TTP were 0.56, 0.94, 1.49, and 1.47, respectively. In stage Ⅱ 2, the areas of delayed TTP and MTT were revealed in all 4 cases, in whom depiction of decreased rCBF and rCBV was also found. The mean ratios of rCBF, rCBV, MTT, and TTP were 0.42, 0.59, 1.57, and 1.55, respectively. Conclusion CT perfusion imaging and its parameters' analysis may play an increasing role to delineate the depiction of cerebral hypoperfusion in pre-infarction period. Analyzing the relationship of rCBF, rCBV, MTT, and TTP is very helpful to know the status of the capillary vessels in regional cerebral hypoperfusion area and to provide functional information with our stages of pre-infarction period.