[Objective]To reconstruct anterior cruciate ligament (ACL) by using ligament advanced reinforcement system(LARS),and to investigate the integration of LARS artificial ligament with bone interface in the animals with regard to imageology, biomechanics and histology.[Method]Twenty-four Boer goats were randomly divided into three groups. The animal mode of ACL reconstruction was established by clinical ACL reconstruction system. Gross observation was made, and histological, imageological and biomechanical changes were observed at 4, 8 and 12 weeks after surgery, respectively. Statistical analysis was performed.[Result](1)At 4 weeks after surgery,ligament-bone interface had great amount of loose bindweb and infiltration of chronic inflammation cells. At 8 weeks after surgery, there was new bone formation. Part of samples had Sharpey fibers. At 12 weeks after surgery, Sharpey fibers.and a large number of fibroblasts were noted in the interface between LARS artificial ligament and bone interface. But calcified cartilage was not founded.(2)The imageology examination for group 3 was made at 4, 8 and 12 weeks after surgery. The data were analyzed statistically by the image processing software of eflime,and there was evident statistical difference (P0.05 ) .[Conclusion]After ACL reconstruction by LARS artificial ligament, indirect connection developed via Sharpey fibers in bone tunnel at the end of LARS artificial ligament and bone interface. The integration of LARS artificial ligament with bone interface has been improved and its intensity is increased.

Objective:To establish rat diabetes and eye disease models by injection of STZ and explore the therapeutic effect of panaxnotoginseng polysaccharides (PNP) on the diabetes and eye diseases of the model rats,and to clarify their mechanisms.Methods:Seventy SD male rats were randomly divided into blank control (n=10) and model groups (n=60), and the rats in model group were fed with high fat diet. 2 weeks later, the rats in model group were intraperitoneally injected with 35 mg·kg-1 STZ to establish the models.And 3 d later, the rats were treated with fasting and water deprivation for 12 h,the fasting blood glucose (FBG)was tested, and the models were assessed to be successful as the FBG>11.1 mmol·L-1.The rats with hyperglycemia were selected and divided into model, melbine(150 mg·kg-1), and low, middle and high doses (75,150 and 300 mg·kg-1) of PNP groups.After orally administration for 5 and 8 weeks, the FBG levels of rats were recorded.And 8 weeks later, the sugar tolerance, hepatic glycogen levels,serum glutathione(GSH) and nitric oxide(NO) levels of the rats were tested.The rat retinas were removed to analyze the expression levels of vascular endothelial growth factor(VEGF) and inducible nitric oxide synthase(iNOS) by using Q-PCR.The pathological changes of retinas were observed by HE staining method.Results:Compared with model group,the FBG level in middle dose of PNP group was decreased 5 weeks after treatment(P<0.05).Eight weeks later, compared with model group, the levels of FBG, sugar tolerance and hepatic glycogen in different doses of PNP groups were all decreased (P<0.05 or P<0.01).Compared with model group, the level of serum GSH in high dose of PNP group was remarkably increased(P<0.01), and the NO level was significantly decreased (P<0.05 or P<0.01).Compared with model group, the expression levels of VEGF and iNOS in high dose of PNP group were significantly decreased (P<0.05).The results of HE staining showed that the neurodeatrophia of the rats in low and middle doses of PNP groups were improved;and the vascular proliferation and neurodeatrophia of the rats in high dose of PNP group were significantly improved.Conclusion:PNP could decrease the blood sugar, increase the levels of GSH and NO, and up-regulate the gene expression levels of VEGF and iNOS, resulting the treatment of diabetes and its related retinopathy.

OBJECTIVETo evaluate the pancreatic fistula affected by different type of pancreaticojejunostomy after pancreaticoduodenectomy.

METHODSElectronic databases PubMed, EMBase, COCHRANE Library, Wanfang, and VIP etc were used to search for randomized controlled trials or non randomized prospective controlled trials reported before September 2013 on clinical effects of pancreaticojejunostomy after pancreaticoduodenectomy. The statistical analysis was done by Review Manager 5.0.

RESULTSA total of 8 trials were included in this meta-analysis. The effects of duct-to-mucosa pancreaticojejunostomy (dmPJ) and invaginating pancreaticojejunostomy (iPJ) on postoperative complication in five studies were compared, and no statistical significance were found in postoperative pancreatic fistula (POPF) (M-H:OR = 0.77, 95% CI:0.35-1.69, P = 0.52), reoperation (M-H:OR = 1.38, 95% CI:0.64-2.95, P = 0.41) and mortality (M-H:OR = 1.15, 95% CI:0.42-3.13, P = 0.79) between dmPJ and iPJ. The effects of binding pancreaticojejunostomy (bPJ) and conventional pancreaticojejunostomy (cPJ) (including duct-to-mucosa pancreaticojejunostomy and invaginating pancreaticojejunostomy) on postoperative complication were compared, and no statistical significance were found in postoperative pancreatic fistula (POPF) (M-H:OR = 0.57, 95% CI = 0.28-1.17, P = 0.13) , reoperation (M-H:OR = 1.18, 95% CI = 0.48-2.92, P = 0.72) and mortality (M-H:OR = 0.74, 95% CI = 0.27-1.99, P = 0.55) between bPJ and cPJ.

CONCLUSIONThere are no significant differences between dmPJ and iPJ in pancreatic fistula reoperation and mortality, and there are also no significant differences between bPJ and cPJ.

Anastomosis, Surgical ; adverse effects ; Humans ; Pancreas ; surgery ; Pancreatectomy ; adverse effects ; Pancreatic Fistula ; etiology ; surgery ; Pancreaticoduodenectomy ; adverse effects ; Pancreaticojejunostomy ; Postoperative Complications ; surgery ; Postoperative Period ; Prospective Studies ; Randomized Controlled Trials as Topic ; Reoperation

This paper is composed with the cardiac sound measurement and analysis system for in-home use of heart abnormality monitoring. The heart sound acquiring system is composed of a traditional chest-piece, earphone, microphone, and IC recorder. The recorded data is transmitted to a computer by USB interface for analysis based on the cardiac sound characteristic waveform (CSCW) method, which is extracted from an analytical model of single degree-of-freedom (SDOF). Furthermore, the characteristic parameters [T1, T2, T11, T12] are defined by the time intervals between the crossed points of the CSCW and a threshold value (THV), which are related to the first sound and the second sound and are used for discriminating normal and abnormal heart sounds. Also, an easy-understanding graphical representation for these parameters is considered, so that, even for an inexperienced user, he or she is able to monitor his or her cardiac status easily. Finally, a case study on the abnormal/normal cardiac sounds is demonstrated to validate the usefulness and efficiency of this proposed system and the cardiac sound characteristic waveform method.
Algorithms ; Heart Auscultation ; Heart Sounds ; physiology ; Humans ; Signal Processing, Computer-Assisted ; Software Design ; Stethoscopes

Objective:To establish the rat diabetic models by introperitoneal injection of streptozotocin (STZ) to observe the expressions of MMP-2 in retina tissue of the diabetic rats at different periods,and to clarify the effect of MMP-2 in the diabetic retiropathy (DR) of the diabetic rats.Methods:The femal SD rats were divded into normal control group (n=24),4-week model group (n=30),6-week model group (n=30) and 8-week model group (n=30).The rats in model groups were intraperitoneally injected with STZ for consecutive 5 d.The rats in normal control group were injected with sodium citrate solution at the same volume.The body weights and blood glucose levels of the rats in each group were measured at 4,6,and 8 weeks.The retina of each rat was removed;RT-PCR and Western blotting methods were used to detect the expression levels of MMP-2 mRNA and protein,and the immunohistochemistry was conducted to observe the morphology.Results:The body weights and blood glucose levels of the rats in each group had no differences (P＞0.05) before modeling.Three rats died in 4-week model group,5 rats died at 6 weeks and 7 rats died at 8 weeks.The body weights of the rats in model group were significantly lower than those in normal control group at the same time (P＜0.05 or P＜0.01),and the fasting blood glucose levels were signifieantly increased (P＜0.05 or P＜0.01).The expression levels of MMP-2 mRNA and protein in the retina tissue of the rats in model group were significantly higher than those in normal control group (P＜0.05).In normal control group,the retinal structure was clear and the cells were arranged in order,and the ganglion cells were arranged in a single layer;in model group,the retinal tissue structure was loose,the number of ganglion cells were significantly reduced,the inner nuclear layer and rod cell layer cell membrane outside were fuzzy.The MMP-2 positive cells were found to be brown yellow granules,especially in the cytoplasm of ganglion cells and vascular endothelial cells.The positive expression levels of MMP-2 in model group were higher than those in normal control group at 4,6,and 8 weeks.Conclusion:MMP-2 can express in the retina tissue of the diabetic rats.

Objective To evaluate the effect of interleukin (IL)-10 on donor lung function after ex vivo lung perfusion (EVLP) in rats of cardiac death. Methods Twenty adult male SD rats were randomly divided into the simple perfusion group (group A, n=10) and modified perfusion group (group B, n=10). Perfusate A (without IL-10) and perfusate B (supplemented with IL-10) was administered in group A and B, respectively. The EVLP rat models of cardiac death were established. The appearance of donor lung, dry-to-wet (D/W) ratio of donor lung tissues, the function and metabolism of donor lung, the morphology of donor lung and the levels of inflammatory markers of donor lung were statistically compared between two groups. Results After perfusion, evident edema of the whole donor lung, poor compliance and a large amount of edema fluid discharged from the airway were observed in group A, whereas no obvious edema and good compliance were found in group B. Compared with group A, the D/W ratio of lung tissues in group B was higher (P < 0.05). In both groups, the pulmonary vein partial pressure of oxygen reached the peak at 2 h after perfusion, which did not significantly differ between two groups (P > 0.05). In group B, the pulmonary artery pressure was increased at a lower speed and significantly lower after perfusion, and the lactic acid level in the perfusate was significantly lower than those in group A (all P < 0.05). In group A, the alveolar structure was largely destroyed and the cells was rare. In group B, the alveolar structure was relatively normal without evident cell edema. The incidence of cell apoptosis of donor lung was high in group A, whereas no obvious cell apoptosis of donor lung was noted in group B. After perfusion for 4 h, the levels of monocyte chemoattractant protein (MCP)-1 and IL-6 were significantly increased, the IL-4 levels were remarkably decreased (all P < 0.05), but the levels of tumor necrosis factor (TNF)-α, IL-1α and inducible nitric oxide synthase (iNOS) did not significantly change in both groups (all P > 0.05). Conclusions IL-10 may improve the function of donor lung after EVLP in rat of cardiac death by reducing cell apoptosis.