Pressure vessel is used in medical organization as a kind of special medical equipment. It's easy to cause injury when improperly used. By analyzing technical performance, product security, accident threat that weakness element of MTF is pointed out and some suggestions of prevention accidents are produced.

The intelligent level of the modern medical equipments is higher than before and the automatic calibration circuits are largely used. The control circuit of the intelligent equipments is quite complicated and its working modes have been simplified to four-terminal or double terminal nets. The intelligent medical equipments such as CT, MRI, DR, PET/ CT have more chances to have some "soft" errors that are usually related to the zero-line calibration. In actual use, it can be noticed and performed, and the detecting and servicing for the medical equipments can be much easier than before.

As the base for the healthy development of civil medical equipment industry,the independent developing ability has attracted extensive attention.Firstly,medical equipment enterprises were divided into 5 modes according to their independent developing ability.Then the fuzzy evaluation method was utilized to evaluate them so as to correctly know the independent developing ability of medical equipment industry in our country.The evaluation shows that the brand value of the civil medical equipment is generally low.

Hypoxia-inducible factor-1α (HIF-1α)is a transcription factor that acts as a master regulator of gene expression induced by low oxygen conditions.HIF-1α is the most sensitive indicator of hypoxia and can be activated by systemic hypoxia,cerebral hemisphere ischemia and cerebral focal ischemia.HIF-1 expression can be induced by hypoxic-ischemic damage after cerebral infarction and exert its effects on hypoxia-inducible downstream genes,thus protecting hypoxic tissues and cells under hypoxic conditions via regulating the expression of its downstream target genes.This article reviews the expression of HIF-1α and its downstream target genes in acute cerebral ischemia,in order to provide a theoretical basis for gene therapy.

Objective To evaluate the role of combination of three-vessel views in ultrasound diagnosis of fetal aortic arch and pulmonary arterial branch anomalies.Methods The data of 66 cases of fetal aortic arch and pulmonary arterial branch anomalies were retrospectively analysed,including echocardiographic data,autopsy and operation records and postnatal follow-up results.Echocardiogaphic features and display frequencies on three vessels and trachea view(3VT),three vessels view(3VV)and three vessels and pulmonary arterial branches view(3VP)were summarized.Results There were 52 cases of aortic arch abnormalities,including 32 cases of right aortic arch with left ductus arteriosus,4 cases of double aortic arch,7 cases of aberrant right subclavian artery,6 cases of coarctation of aorta and 3 cases of interruption of aortic arch.Fourteen cases were diagnosed pulmonary aterial branch abnormalities,including 1 0 cases of crossed pulmonary arteries,2 cases of anomalous origin of left pulmonary artery from aortic arch and 2 cases of pulmonary artery sling.The display frequencies of fetal aortic arch and pulmonary arterial branch anomalies on 3VT,3VV and 3VP were 80.3%,19.7% and 39.4%.Conclusions The combination of three-vessel views is of great value in prenatal diagnosis of fetal aortic arch and pulmonary arterial branch anomalies.

To investigate the effect of proteasome inhibitor MG132 on the apoptosis of bovine lens epithelial cells (BLECs), the cells were treated with MG132 at different concentrations for12, 24 and 36 h. The cell viability was analyzed by MTT assay and the effect of MG132 on the apoptosis of BLECs was assessed by flow cytometry (FCM). The results showed that after treatment for the same period, the inhibitory effect of MG132 on BLECs proliferation was enhanced with the increment of the concentration of MG132 (0, 2, 5, 10, mumol/L) (P<0.05). The 50% inhibiting concentration (IC(50)) was 2.03 mumol/L when the BLECs were treated with MG132 for 36 h. MG132 also induced the apoptosis of BLECs obviously. FCM showed that the apoptosis index of the cells treated by MG132 at 2 mumol/L for 12 h was (20.24+/-1.51)%, and that of the control was (0.98+/-0.20)% respectively (P<0.01, n=3). It was concluded that MG132 could lead to apoptosis of BLECs. The decrease of proteasome activity may play an important role in the formation and development of cataract.

Objective To introduce and evaluate an improved technique of vertical mammaplasty for correction of severe breast ptosis. Methods Vertical mammaplasty that was first reported by Ma-deleine Lejour in Brussels is a technique that uses adjustable markings, an upper pedicle for the areola, and a central breast reduction with lower skin undermining. To shorten vertical scar, it was important to locate new nipple position and move up new inframammary fold. The shape of the breast was crea-ted by suturing the gland and did not rely on the skin. No scar was produced in submammary fold. Re-sults 36 cases were treated with vertical mammaplasty in our department since August 1999. The shape of the new breast was satisfactory in all patients after 3-24 months following-up. Areora necro-sis was not found in all the cases. Conclusion The vertical mammaplasty is an optical technique for correction of severe breast ptosis, Stable results are produced because the gland is strongly sutured.

Objective: To study the effect of water extracting and alcohol extracting process to anthraquinone content in Rhubarb. Methods: Choosing water and different concentration of alcohol as the solvent, the effect of permeating time, the extracting time, the degree of extracting, the amount of solvent and concentration of alcohol to total, conjugated, and deoxidized anthraquinone content were determined by orthogonal test. Results: Using water as the solvent, the degree of extracting is the significant factors to total anthraquinore with ( P

The paper puts forward the design and application of an imaging analysis system for micro-particles.The structure of the system,design theory and its application are discussed in the paper.

The quality of technicians is the dominate factor to determine the level of medical engineering section.The key to improving technical skills is to do basic jobs.During the Tenth Five-Year-Plan,we not only did many basic jobs and research works in science but did a lot of revolutions in order to accelerate the development of medical engineering and improve the working quality.Compared with the past,we have made great progress and development in standardized management,technology support,technician education,scientific researches,studies,technology level,the quality of service,etc.