To master the performances of the cardiac defibrillator-monitor and enhance its reliability and effi-ciency through quality control. ESA612 electrical safety analyzer and Phase3 defibrillator analyzer were used to test the performances of 56 cardiac defibrillator-monitors, involving in basic items detection, electrical safety detection and performance detection. The qualified items included charging times, internal discharge, ECG monitoring and etc, while the unqualified ones included appearance, electrical safety as well as delay time under synchronous mode. The quality control can improve the safety of the cardiac defibrillator-monitor.

Objective To evaluate the effects of various resection and reconstruction method on pain relief and function restoration for periacetabular metastatic destruction in different grade. Methods This study involved 20 patients, 11 males and 9 females, with the average age of 52 years(range, 43-82 years). The original tumor consisted of 5 renal cell carcinoma, 4 breast carcinoma, 3 lung carcinoma, 2 thyroid carcinoma, 1 prostate carcinoma, 1 rectum carcinoma and 4 unknown primary cancers. A solitary periacetabular metastatic lesion was demonstrated in 14 patients and multi-metastases were seen in 6 patients, and accompanying periacetabular pathologic fractures in 4 patients. As to the Harrington grading system for the periacetabular metastatic destruction, there were 8 grade Ⅰ, 5 grade Ⅱ, and 7 grade Ⅲ. And according to grade Ⅰ, curettage and cement packing (5 cases) as well as stability reconstruction in iliac and acetabulum (3 cases) were performed; grade Ⅱ, curettage, cement packing and total hip arthroplasty with reinforcement ring was performed; grade Ⅲ, en bolc resection of acetabular lesion and modular prosthesis reconstruction was performed. The average score was 5.4(ranged from 3 to 9) according to Tomita scoring system. The pain relief and functional recovery were investigated from the regular follow up postoperatively. Results All patients showed the improvement in pain relief and mobility postoperatively. No prosthetic dislocation, deep infection and leg length discrepancy occurred. The prosthesis or internal fixation loosening happened in 5 of 15 patients at different stage. The median survival time of all patients was 16.5 months (range from 4.2 to 63 months). 2 patients survived over 5 years, 3 over 2 years, 6 over 1 year, 6 over 6 months, and 3 less than 6 months. According to the Enneking functional scoring system, the patients were rated as excellent in 10 cases, good in 8, fair 1 and poor 1 at the 3rd month postoperatively, and for the 7 cases with grade Ⅲ, excellent 2, good 2, and poor 2. The functions of 11 patients survived one year after surgery were excellent in 3, good 4, fair 2 and poor 2. Conclusion The favorable resections and reconstructions for periacetabular metastatic destruction could lead to remarked improvement in pain relief, functional recovery and quality of life.

Eight-weeks old C57BL/6J male mice were treated with normal or high fat diet for4 weeks,and then bone mass,number and activity of osteoclasts,differentiation of osteoblasts from bone marrow mesenchymal cells and the change in lipid genes expression were studied.Compared with the normal diet treated group,bone mass of femur from high fat diet treated animal was decreased,but there were increased number and activity of osteoclasts and raised lipid genes expression levels.Besides,no obvious change was found in differentiation of osteoblasts from bone marrow mesenchymal cells.The loss of bone mass induced with high fat diet in young mice was mainly due to increased activity of osteoclasts and bone resorption.

Objective To study the mechanism of GuiJi cream in dispelling effects on corrupt microorganism.Methods A total of 90 full-layer skin injured rats were served as test model. The effects of Guiji cream on collagen type Ⅰ (C Ⅰ), matrix metalloproteinase-1 (MMP-1) and MMP-3 in granulation tissue of wound were observed with immunohistochemistry technique and image-analysis system at various stages of healing. Results The expression of C Ⅰ was obviously increased and the level of MMP-1 and MMP-3 increased at the early stage and kept at a high level from day 3 to day 10. Conclusion The mechanism of GuiJi cream for dispelling effects on corrupt microorganism was increasing the C Ⅰ content in granulation tissue of wound through inhibiting the secretion of MMP- 1.

The self-microemulsion formulation of potassium dehydroandrographolidi succinas (PDS) has been optimized and the performance in vitro has been evaluated preliminary. Kinds of prescription accessories were screened by solubility based on the emulsifying result and efficiency, particle size of emulsions. The optimal formulation composition and compatibility proportion were determined by orthogonal design and pseudo-ternary phase diagrams. The appearance, particle size, Zeta potential and stability of this formulation were also investigated. The optimized prescription of PDS was 10% MCT, 40% Tween-20 and 50% glycerol. It can spontaneously form a transparent pale blue opalescent emulsion with emulsification time 31.27 s, particle size 37.1 nm, Zata potential -17.4 mV and good stability.

BACKGROUND: There is no any mature and complete system to repair nerve tissue after segmental injury due to particularity of nerve tissue regeneration. Using tissue-engineering technique to solve this problem is difficult and challenged.OBJECTIVE: To research an artificial nerve bridging substance in application of repairing nerve injury on clinic and obverse its microcosmic spatial structure at the same time.DESIGN: Open experiment.SETTING: Orthopaedic Research Institute, Xijing Hospital of the Fourth Military Medical University of Chinese PLA.MATERTALS: The experiment was carried out in the Orthopaedic Research Institute, Xijing Hospital of the Fourth Military Medical University of Chinese PLA from November 2001 to January 2003. CollagenⅠ, collagen Ⅳ and gelatin were provided by Sigma-aldrich Company, USA.METHODS: Establishment of bridging substance: Collagen Ⅰ (65.53%) and collagen Ⅳ (32.77%) were added into 0.05 mol/L acetic acid solution, respectively; and then, two suspensions were mixed together and stirred at 4℃. The suspension of collagen and heparin sulfate was pumped, held still and poured into silica gel tube with bore of 3 mm.Continuously, two ends of tube were enclosed and suffered from cold drench and mold at five various speeds. General observation was done. Composites were intercepted cross section, vertical section and 45° section for observation by optic microscope at different speeds of 10×10-5 m/s, 5×10-5 m/s, 2.5×10-5 m/s, 1.0×10-5 m/s and 1.0×10-6 m/s; meanwhile, interior structure of microtubule was observed with scanning electron microscope. Interior diameter of microtubule was calculated as the following formula: actual aperture = (magnification × area of microtubule) ÷ (length of guage × perimeter of aperture).MAIN OUTCOME MEASURES: ① General observation; ② observation with microscope; ③ observation with scanning electron microscope and interior diameter of microtubule.RESULTS: ① General observation: Models were regular cylinders and had symmetrical features. Flexility was wonderful,texture was well-proportioned, and elasticity was strong. ② Results of optic microscope: Structure of external surface was completely blocking without any poricidal dehiscence. Surface was smooth and had good continuity. ③ Results of electron microscope: External surface shaped like terrace tile; asides, interior structure of microtubule was average and its courser was coincident and parallel to each other. Microtubules with longitudinal courser were independence on each other. The structure was blocking and did not connect to each other. This was as the same as courser of nerve fibrous bands of organis. Cross section of interior microtubule was general round and regular, and the diameter was average. Interior microtubule had groat continuity without breaks or transection. Trabeculae of microtubule also had groat continuity,and its surface was smooth. Interior diameter of microtubule ranged from 197.3 μm to 258.8 μm.CONCLUSION: Nerve bridging substance is made of collagen and gelatin which are characterized by groat compatibility and degradation after mixture, lysis and cold drench, It has singly longitudinal microtubule and microstructure of high imitation by normal nerves, so nerve bridging substance can be used in basic researches and repair nerve injury on clinic.

Objective: To study characteristics of diagnosis and treatment of arachnoid cysts in the sacral canal. Method: After laminectomy of the sacral canal, arachnoid cysts were treated in three ways: 13 cases underwent excision of the most of the cyst wall and suture of redundant wall around the intracystic nerve; 8 cases underwent the excision of the most of the cyst wall and plugging the communicating hole with a block of muscle; 2 cases underwent excision of most of the cyst wall and leaving them unsutured. Clinical results were evaluated after 30. 2 months' follow-up. Changes in the imaging materials (X-ray, CT, CTM and MRI) were also evaluated. The clinical behaviors, pathologies and complications post-operatively were analyzed. Result: Long T1 and T2 signals of the cysts could be clearly showed in MRI, and the signal density was the same as that of cerebrospinal fluid. Clinical symptoms were caused by compression of sacral nerve. Generally, there were communicating holes between cysts and thecal sacs. There were no statistical differences between first two methods of treatments. The complications post-operatively included erosion of wound skin and intracranial infection. Conclusion: MRI allows us to better illustrate the arachnoid cyst in sacral canal, and the cyst seems to arise as a result of congenital defect of thecal dura. Excision of the most of the cyst wall and plugging the communicating hole with a block of muscle seems to to a reasonable method to treat the carachnoid cysts in the sacral canal. Do not put the drain tube and forbidding patients to lie supinely are better for reducing the complications.

Objective:To observe the clinical efficacy and safety of compound Bletilla Striata cream in the treatment of patients with second degree hand rhagadia. Methods: Totally 146 patients with second degree hand rhagadia were randomly divided into the treatment group and the control group with 73 cases in each. The treatment group was treated with compound Bletilla Striata cream, while the control group was treated with urea ointment. The treatment course was 10 days. The time of paln disappearance, keratoder-ma softening and rhagadia healing were compared between the two groups, and the efficacy and adverse drug reactions of the two groups were also observed and compared. Results:After the first treatment course, the curative rate of the treatment group was 94. 5%, which was higher than that of the control group (82. 2%) with statistical significance (P<0. 05). The total effective rate of the two groups was both 100% without statistical significance (P>0. 05). The time of keratoderma softening and rhagadia healing in the treatment group was significant shorter than that in the control group (P<0. 05), while the time of paln disappearance showed no significant difference between the two groups(P>0. 05). Conclusion: Compound Bletilla Striata cream in the treatment of second degree hand rhagadia is effective and safe, which shows good prospect for clinical application.

Object To determine the structures of three saponins isolated from leaves of Aralia elata (Miq ) Seem Methods HPLC and electrospray ionization and tandem mass spectrometry were used for purification and structure identification Results Three saponins were identified as congmunoside Ⅴ, congmunoside Ⅶ, and congmunoside Ⅹ Conclusion These saponins are obtained from the leaves of A elate for the first time

Objective To compare imaging features and to evaluate clinical values of aortic dissection(AD) with MRI and spiral CT.Methods MRI and spiral CT findings of AD in 18 cases confirmed by clinical or surgical pathology were analysed retrospectively.Results The sensitivity and specificity of two advanced techniques in diagnosis of AD were high.MRI and CT showed the dimension,true or false lumen,intimal flap,intimal tear,thrombus and intramural hematoma of AD,aortic dilatation or stenosis and the major aortic branches.Conclusion The two techniques are important for the suspect AD,two techniques are similar to display the features of dimension,classification,true or false lumen and aortic dilatation or stenosis,MRI plays an important role in diagnosis of AD and is better than CT in demonstrating the intimal flap,intimal tear,thrombus,intramural hematoma and the involvement of the major aortic branches,there were limitation in demonstrating calcification of intimal flap or vascular wall and emergency patients.