Objective To evaluate the efficacy and priority of laparoscopy in the diagnosis and treatment of acute peritonitis. Methods Clinical data of 133 cases of acute peritonitis diagnosed and treated under laparoscope between April 2001 and October 2004 were retrospectively reviewed. Results Of the 133 cases, there were 60 cases of gastroduodenal perforation, 15 cases of acute cholecystitis, 8 cases of gallbladder perforation, 2 cases of sigmoid colon perforation, 35 cases of acute perforated appendicitis, 3 cases of jejunal diverticulum perforation, 1 case of foramen of Winslow hernia, 4 cases of acute pancreatitis, and 5 cases of primary peritonitis. The diagnostic accuracy was 100%. All the patients were treated laparoscopically without complications. Conclusions Laparoscopy gives a high diagnostic accuracy for acute peritonitis. The rationale for the use of it lies in the possibility of avoiding time- consuming preoperative B-ultrasonography or CT scans and performing minimally invasive surgical interventions directly.

Objective To investigate the clinical feas ib ility of endoscopic resection of benign mammary tumors. Methods A total of 22 cases were detected as benign mammary tumors by molybdenum targe t X-ray examinations from March 2002 to August 2003, including 15 cases of fibro ma and 7 cases of cystoid adenoma. The tumor was 2~4 cm in diameter (mean, 2.8 c m). A two-port transaxillary endoscopic resection using the electrotome and harm onic scalpel was carried out. Results The resection was comple ted endoscopically in all the 22 cases. The operation time was 28~68 min (mean, 42 min). A drainage tube was maintained for 1 day. Except for 1 case of subcutan eous effusion, no skin necrosis and other complications happened. The patients r ecovered uneventfully and stayed in hospital for 2~4 d (mean, 3 d) postoperative ly. There were no scars on the breast. Conclusions Transaxilla ry endoscopic resection of benign mammary tumors is safe and feasible and gives good cosmetic results.

ObjectiveTo investigate the effect of propofol repeated anesthesia on the expression of CaMK Ⅱ α in the hippocampus in neonatal rats.MethodsThirty-two SD rats aged 7 days weighing 12-16 g were randomly divided into 2 groups (n =16 each): group C received intraperitoneal 0.9％ normal saline 7.5 ml/kg once a day for 7 days and group P received propofol 75 mg/kg once a day for 7 days.Learning and memory function were assessed using Morris warier maze at 28 days old of rats.The animals were sacrificed at 24 h after the tests and brain tissues were removed.The expression of CaMK Ⅱ α and phosphorylated CaMK Ⅱ α (pCaMK Ⅱ α) in hippocampal CAI region were determined by immunochemistry and Western bolt.ResultsCompared with group C,the escape latency was significantly prolonged,space exploration time shortened and expression of CaMK Ⅱ α and pCaMK Ⅱ α down-rugulated in group P than in group C( P ＜ 0.01 ).ConclusionPropofol repeated anesthesia decreases congnitive function through down-regulating the expression and inhibiting the activity of CaMK Ⅱ α in hippocampus in neonatal rats.

· AlM: To study the effect of bone mesenchymal stem cells ( BMSCs ) and chondroitinaseABC ( ChABC ) on photoreceptor apoptosis in the retina of sodium iodate-induced rats.
·METHODS:Forty Sprague Dawley rats ( SD rats) were intraperitoneally injected with NalO3 (30g/L, 100mg/kg) to establish the retinal degeneration models ( postnatal 28d).These rats were devided into 4 groups.Group A was not injected, group B was injected with BMSCs, group C was injected with BMSCs and ChABC, and group D was injected with phosphate buffer saline ( PBS).After 28d, subretinal injection were applied. Hematoxyln - eosinstaining ( HE ) , tunel and immunohistochemistry were performed at 21d after subretinal injection.
· RESULTS: Photoreceptor number and photoreceptor apoptosis rate of B and C groups were more than those of A and D groups, and there was significant difference statistically ( P <0.05 ) . Photoreceptor number and photoreceptor apoptosis rate of group B were compared with those of group C, and there was no statistical significance between B and C groups ( P>0.05 ) .Glial fibrillary acidic protein ( GFAP) was expressed by BMSCs after intraocular injection.
· CONCLUSlON: BMSCs and ChABC injected into subretinal space may alleviate photoreceptor apoptosis so as to protect retinal photoreceptor cells in degenerated rats.

Esophagogastric Junction/surgery* ; Gastrectomy/methods* ; Humans ; Laparoscopy/methods* ; Retrospective Studies ; Stomach Neoplasms/surgery*

Vigilance is defined as the ability to maintain attention for prolonged periods of time. In order to explore the variation of brain vigilance in work process, we designed addition and subtraction experiment with numbers of three digits to induce the vigilance to change, combined it with psychomotor vigilance task (PVT) to measure this process of electroencephalogram (EEG), extracted and analyzed permutation entropy (PE) of 11 cases of subjects' EEG and made a brief comparison with nonlinear parameter sample entropy (SE). The experimental results showed that: PE could well reflect the dynamic changes of EEG when vigilance decreases, and has advantages of fast arithmetic speed, high noise immunity, and low requirements for EEG length. This can be used as a measure of the brain vigilance indicators.
Attention ; Brain ; physiology ; Electroencephalography ; Entropy ; Humans ; Mathematics

Mental fatigue is an important factor of human health and safety. It is important to achieve dynamic mental fatigue detection by using electroencephalogram (EEG) signals for fatigue prevention and job performance improvement. We in our study induced subjects' mental fatigue with 30 h sleep deprivation (SD) in the experiment. We extracted EEG features, including relative power, power ratio, center of gravity frequency (CGF), and basic relative power ratio. Then we built mental fatigue prediction model by using regression analysis. And we conducted lead optimization for prediction model. Result showed that R2 of prediction model could reach to 0.932. After lead optimization, 4 leads were used to build prediction model, in which R' could reach to 0.811. It can meet the daily applicatioi accuracy of mental fatigue prediction.
Electroencephalography ; Humans ; Mental Fatigue ; Models, Biological ; Sleep Deprivation

We applied Lempel-Ziv complexity (LZC) combined with brain electrical activity mapping (BEAM) to study the change of alertness under sleep deprivation in our research. Ten subjects were involved in 36 hours sleep deprivation (SD), during which spontaneous electroencephalogram (EEG) experiments and auditory evoked EEG experiments-Oddball were recorded once every 6 hours. Spontaneous and evoked EEG data were calculated and BEAMs were structured. Results showed that during the 36 hours of SD, alertness could be divided into three stages, i. e. the first 12 hours as the high stage, the middle 12 hours as the rapid decline stage and the last 12 hours as the low stage. During the period SD, LZC of Spontaneous EEG decreased over the whole brain to some extent, but remained consistent with the subjective scales. By BEAMs of event related potential, LZC on frontal cortex decreased, but kept consistent with the behavioral responses. Therefore, LZC can be effective to reflect the change of brain alertness. At the same time LZC could be used as a practical index to monitor real-time alertness because of its simple computation and fast calculation.
Attention ; physiology ; Brain Mapping ; Electroencephalography ; Evoked Potentials ; Humans ; Nonlinear Dynamics ; Sleep Deprivation

The objective of the present study was to establish a method based on principal component analysis (PCA) for the study of transdermal delivery of Chinese medicinal formulae, and to choose the best penetration enhancers for Qingfei Xiaocuo gel depend on this method. Using improved Franz type diffusion cell and excised rat skin in vitro as transdermal barrier, the receptive solution fingerprint was established by HPLC, harvesting the areas of the common peaks in the fingerprint, then the total factor scores of the concentrations at different times were calculated using PCA and were employed instead of the concentrations to compute the cumulative amounts (Q12) and enhancement ratio (ER), the latter of which were considered as the indexes for optimizing penetration enhancers. Compare to the control group, the ER of the other groups increased significantly and furthermore, 2.5% azone with 2.5% menthol manifested the best effect. PCA represent most information in the receptive solution, the method above could choose the best penetration enhancers, it could be a reference for the study of transdermal delivery of Chinese medicinal formulae.
Administration, Cutaneous ; Animals ; Drugs, Chinese Herbal ; analysis ; pharmacokinetics ; Gels ; In Vitro Techniques ; Male ; Medicine, Chinese Traditional ; Mice ; Principal Component Analysis ; Skin ; metabolism

BACKGROUND: Meseuchymal stem cells (MSCs) have extremely strong self-duplication ability and multidirectional ifferentiation potential. When bone marrow stromal cells (BMSC) are isolated and cultured in vitro, implanted in vivo, the distribution and colonization are still unclear, which is concerned with whether BMSC can be usedas target cells in clinic.OBJECTIVE: To explore the capacity of colonizing to the liver after allografting of green fluorescent protein (GFP) labeled MSCs of rats by different approaches.DESIGN: Factorial design.SETTING: Department of General Surgery, Second People's Hospital of Guangdong Province, Postdoctoral Workstation of Sun Yat-Sen University;Department of General Surgery, Zhujiang Hospital, Southern Medical University; Department of Organ Transplantation, Third Hospital Affiliated to Sun Yat-Sen University.MATERIALS: The experiment was performed at the Staff Room of Pharmacology, Basic Department, First Military Medical University of Chinese PLA from January 2003 to December 2004. A total of 36 clean adult SD rats were selected and randomly assigned into 5 groups: CCL4 plus portal vein transplantation group (n=6), portal vein transplantation control group (n=6), CCL4 plus caudal vein transplantation group (n=6), caudal vein transplantation control group (n=6) and mixed group (n=12).METHODS: ① MSCs were obtained from rat marrow and labeled with GFP. After amplifying in vitro, MSCs suspension was implanted with thin needle, with the volume of 0.5 mL/100 g. ②CCL4 plus portal vein transplantation group: In 3 days before MSCs transplantation, the rats were administrated with 20 g/L CCL4 2.5 mL/kg by gastric perfusion every day. The dose was double at the first time. Labeled MSCs were implanted from portal vein. Portal vein transplantation control group: Before transplantation the MSCs were bred commonly, and the labeled MSCs were implanted from portal vein. CCL4 plus caudal vein transplantation group: In 3 days before MSCs transplantation, the rats were administrated with 20 g/L CCL42.5 mL/kg by gastric perfusion every day. The dose was double at the first time. Labeled MSCs were implanted from caudal vein. Caudal vein transplantation control group: Before transplantation the MSCs were bred commonly, and the labeled MSCs were implanted from caudal vein. Mixed group: On the basis of the former 4 groups, 2 rats were implanted with non-labeled MSCs; Another 2 rats fed with CCL4 for 3 days and normal feed were established, without MSCs transplantation. ③At days 3 and 7 after transplantation expression of transplanted MSCs in liver of rats of each group were examined with fluorescent quantitative PCR.MAIN OUTCOME MEASURES: ①Results of MSCs isolation, purification, in vitro amplification and phenotype identification, ②result of GFP-labeled MSCs, ③observation of growth of rats following allografting of MSCs, and ④result of quantitative identification of GFP positive DNA amount in hepatic tissues of each group.RESULTS: Totally 36 experimental SD rats were involved in the result analysis. ①Percoll gradient separating medium was applied to isolate bone marrow of rats. The obtained cells were transferred and amplified,and then mostly showed coincident shuttle shape. Cells did not express CD34 and CD45, but CD29, CD44 and CD90 of MSCs, which were noncommitted stem cells in non-differentiating status that were different from hemopoietic stem cells in bone marrow. ②The green fluorescent cells appeared 24 hours after MSCs transfection. From hour 48 to 72 the number of positive cells significantly increased, with strong intensity.The transfection efficiency was 20%-30% under high-power field, and most of the cells were with green fluorescence. But green fluorescent cells did not appear in the MSCs cells as control. ③After allografting of labeled or non-labeled MSCs of rats with different approaches, at day 1 the rats were listless with bad food appetite, less mobilization; At day 2mostly of them had normal diet and mood, but there was no significant difference in rats of each group. ④The rats in each group with the exception of mixed group had green fluorescent protein positive cells in liver at days 3 and 7. The number of green fluorescent protein positive DNA was higher in liver tissues in the CCL4 plus portal vein transplantation group and CCL4 plus caudal vein transplantation group than in the portal vein transplantation control group and caudal vein transplantation control group (P＜0.05).CONCLUSION: Duration and amount of stem cells colonizing in liver may be associated with liver injury, while not related to the implantation approach. In normal animals with uninjured liver the stem cells can colonize in liver, and the amount is associated with transplantation approach and post-transplantation duration.