Objective To improve arterial anastomosis method for rat renal transplantation. Methods Renal transplantations were performed on 72 wistar rats. The donor superior mesenteric artery was end-to-end anastomosed to the recipient left renal artery by using of sleeve anastomosis technique. The external diameters of the vessels anastomosed were 0.60±0.05 mm (left renal artery) or 0.80±0.07 mm (superior mesenteric artery). The procedure consisted of a guidingsuture and two fixing sutures. The guiding suture was used to “telescope” therecipient left renal artery into the donor superior mesenteric artery about 2 millimetre. Two fixing sutures were applied 180°apart from each other and tied. Three sutures passed through all layers of the donor superior mesenteric artery andconstricted the vessel lumen, but only penetrated the adventitia of the recipient left renal artery. Results The time for arterial anastomoses was approximately 6 to 8 minutes. The renal grafts perfused very well after the recipient left renal artery clamp was removed. Complications included anastomotic hemorrhage(1 case) and thrombosis (1 case). Histologic examination of 34 grafts at different postoperative time ranging from 6 to 30 days revealed that renal artery was fully patent, with no evidence of ischemic injury. Conclusion The modified arterial sleeve anastomosis technique is simple and feasible regardless of experimentalcondition and can be easily performed.
Objective To investigate the risk factors of infantile urolithiasis resulted from taking milk powder with melamine. Methods The clinical data of infant and young children who took free-screening for melamine associated urolithiasis in the Lanzhou University Second Hospital from September 14th, 2008 to January 6th, 2009 were collected, while the infants without urolithiasis in the same number as those with urolithiasis were also randomly collected into the control group. Then both univariate and multivariate analyses were performed with a logistic regression model to assess the independent risk factors for urolithiasis. Results Of the screened children, 647 children were included in the urolithiasis group and 647 were in the control group. There were 678 boys and 616 girls with an average age of 19.27 months. The results of logistic regression analysis showed that, the children fed with Sanlu powdered infant milk formula which contained a high level of melamine were more likely to suffer from urolithiasis than those took other melamine-contaminated formula (OR=6.09, Plt;0.01); boys were more than girls (OR=1.39, Plt;0.01), and children fed with formula alone were more than those fed with both formula and breast milk (OR=1.61, Plt;0.01). The risk of urolithiasis decreased gradually with age, and the OR value of children in age of smaller than 6 months, 6 to 12 months, 12 to 24 months were 5.23 (Plt;0.01), 2.73 (Plt;0.01), and 1.60 (Plt;0.01), respectively. The risk of urolithiasis increased gradually with the time lengthening of taking melamine-contaminated formula, and the OR value of children who had took melamine-contaminated formula for 3 to 6 months, 6 to 12 months and more than or equal to 12 months were 2.10 (Plt;0.01), 2.81 (Plt;0.01), and 4.75 (Plt;0.01), respectively. Conclusion It shows that feeding with high melamine infant formula (Sanlu powdered infant milk formula), artificial feeding and male children are the risk factors of infantile urolithiasis. Additionally, the risk of urolithiasis decreases with age and increases with time of formula feeding
Objective To investigate the incidence of urolithiasis in infants aged 0-3 years old fed by melaminetainted milk powder in Gansu province. Methods Questionnaires were distributed to 7 856 infants who were screened for urolithiasis in the Second Hospital of Lanzhou University by ultrasound examination from September 25, 2008 to November 15, 2008. Data were collected by Excel and analyzed by SPSS 13.0 software. Results A total of 4 090 (52.06%) male infants and 3 766 (47.94%) female infants underwent ultrasound examination in the Second Hospital of Lanzhou University. The mean age of the infants with urolithias was 18.30±9.68 months. Of those, 704, including 434 males (61.65%) and 270 females (38.35%), were diagnosed with urolithiasis, with an incidence of 8.96%, and 99.14% of calculus was located in kidney. And, 58 aged 0-6 months with an incidence of 3.16%, 218 aged 6-12 months with an incidence of 11.01%, 275 aged 12-24 months with an incidence of 12.55%, and 153 aged 24-36 months with an incidence of 8.27%. The relationship between the incidence of urolithiasis and gender as well as age was assessed by using the Pearson Chi-square test. The results showed significant differences in the incidence of urolithiasis among infants of different genders and different ages (Plt;0.05). The result of multiplelogistic regression analysis indicated that gender was related to the incidence of urolithiasis (Plt;0.05). Conclusion The incidence of urolithiasis in the infants aged 0-3 years old in Gansu province is relatively high. The incidence of urolithiasis focuses on the infants aged 6-24 months and has anatomical specificity.
ObjectiveTo systematically review the risk factors for intravesical recurrence (IVR) after radical nephroureterectomy (RNU) of upper tract urothelial carcinoma (UTUC).MethodsPubMed, EMbase, The Cochrane Library, CBM, CNKI, VIP and WanFang Data databases were electronically searched to collect case-control studies about the risk factors for IVR after RNU of UTUC from inception to August 2017. Two reviewers independently screened literature, extracted data and assessed the risk of bias of included studies, then meta-analysis was performed by RevMan 5.3 software.ResultsA total of 23 studies involving 8 614 patients were included. The results of meta-analysis showed that the history of bladder cancer (HR=1.77, 95%CI 1.42 to 2.22, P<0.001), tumor stage (≥T2) (HR=1.41, 95%CI 1.09 to 1.82,P=0.009), ureteral tumor (HR=1.34, 95%CI 1.20 to 1.49, P<0.000 01), tumor multifocality (HR=1.51, 95%CI 1.34 to 1.69,P<0.001), lymphovascular invasion (HR=1.43, 95%CI 1.20 to 1.70,P<0.000 1), laparoscopic surgery (HR=1.52, 95%CI 1.08 to 2.15,P=0.02), positive surgical margins (HR=1.87, 95%CI 1.17 to 2.99, P=0.009), and preoperative ureteroscopy (HR=1.46, 95%CI 1.21 to 1.75, P<0.001) were the risk factors for IVR after RNU.ConclusionsCurrent evidence shows that the risk factors for IVR after RNU include history bladder cancer, tumor stage (≥T2), ureteral tumor, etc. Due to the limited quality of the included studies, more high quality studies are required to verify the above conclusion.