【Abstract】Objective To investigate the relationship between the development of pancreatic cancer and inflammation, and the therapy strategy.Methods Related articles were reviewed.Results The pathogenesis of inflammation in pancreatic cancer development involves cytokines, NF-κB, COX-2, PPAR-γ, DNA damage, gene changes，etc. Based on these mechanisms some medications are under developing. Conclusion Accumulative effects of pancreatic inflammation may lead to DNA changes, and even pancreatic cancer development. Medications aimed at suppressing pancreatic inflammation may help with prevention and treatment of pancreatic cancer.
Objective To observe the histopathological changes in human eyes with ischemic central retinal vein occlusion (CRVO), and to provide objective basis for effective methods of prevention and treatment for (CRVO). Methods Histopathological analysis was performed on the samples of 11 eyes in 11 patients with ischemic CRVO. The changes of central retinal veins (CRV) and central retinal arteries (CRA) wereobserved. Results The lumen of CRV became narrow when passed through the lamina cribrosa in 11 eyes, in which organized thrombus was found in the lamina cribrosa region and post lamina cribrosa region in 5 eyes, and organized thrombus re-unobstructed channels, endothelial proliferation and narrow lumen were found in 6 eyes. Arteriosclerosis of the CRA was observed in all of the 11 eyes with thick wall of the artery and narrow lumen. Proliferation of endothelium of wall of CRA and narrow lumen in the lamina cribrosa region was found in 2 eyes and no thrombus was found at the lamina cribrosa level. Conclusion During the course of ischemic CRVO, thrombus occurs in CRV at the level of lamina cribrosa. The prognosis of CRVO may lie on the time and degree the thrombosis re-opens. The mechanism of CRVO is that CRV is pressed in the narrow interspace of scleral channels of lamina cribrosa. (Chin J Ocul Fundus Dis, 2007, 23: 163-165)
Crohn’s disease (CD) is a chronic, remitting and segmental inflammatory disease of the gastrointestinal tract, radiological examinations play critical roles in the diagnosis of CD. The common radiological examinations include ultrasound examinations of intestine, computed tomography enterography (CTE), and magnetic resonance enterography (MRE) in clinic. The application of CTE and MRE is limited because of radiation exposure or higher costs. The ultrasound examinations of intestine including conventional intestinal ultrasound, ultrasonic elastography, and contrast-enhanced ultrasound have been studied because of the advantages of non-invasiveness and convenience. The accuracy of the intestinal ultrasound has been already partially validated in assisting diagnosis and evaluating the disease activity and location in CD patients. This review aims at summarizing the diagnostic potency and prospect of the application of ultrasound examinations of intestine in CD patients.
Objective To evaluate the diagnostic accuracy of the aberrant methylation of genes in stool for colorectal tumor. Methods Databases including The Cochrane Library, PubMed, EMbase, CBM, Web of Science, CNKI and WanFang Data were searched to collect the diagnostic trials on the aberrant methylation of genes in stool for colorectal tumor published from January 1990 to February 2012. QUADAS items were used to evaluate the quality of the included studies, and the meta-analysis was conducted using Meta-Disc 1.4 software. Results A total of 32 studies involving 3 951 patients were included. The results of meta-analysis showed that, for detecting the colorectal tumor, the weighted sensitivity, specificity, diagnostic odds ratio (DOR), area under the summary receiver operating characteristic (SROC) curve and Q were 92% (95%CI 91% to 93%), 63% (95%CI 61% to 65%), 20.79 (95%CI 15.13 to 28.57), 0.861 9 (SE=0.020 4), and 0.792 6 (SE=0.019 8), respectively. For detecting the colorectal cancer, the weighted sensitivity, specificity and area under the curve (AUC) were 91% (95%CI 89% to 92%), 75% (95%CI 73% to 77%), and 0.900 7, respectively. For detecting the colorectal adenoma, the weighted sensitivity, specificity and AUC were 79% (95%CI 76% to 83%), 75% (95%CI 73% to 77%), and 0.845 7, respectively. Conclusion With high sensitivity (92%) and moderate specificity (63%), aberrant methylation of genes in stool can be used as an optional noninvasive method for the diagnosis of colorectal tumor.
Objective To learn the postoperative wound complications of thyroid and parathyroid, respiratory complications, duration of hospital stay and postoperative mortality, so as to further clarify the clinical effectiveness of placing drainage tube after thyroid and parathyroid surgery. Methods The following databases as The Cochrane Library, MEDLINE, EMbase, SCI and CNKI were retrieved orderly from the date of their establishment to March 29th, 2011. The literature was screened strictly according to inclusive criteria, included studies were analyzed using RevMan5.1.2 software, and the evidence levels of all indicators were evaluated using GRADEpro 3.5.1 software. Results A total of 16 studies involving 1 907 participants were included. There was no high-quality literature. No case reports of death and respiratory distress syndrome. Comparing the drainage group with the non-drainage group among the 16 studies, no significant difference was found in the incidence of re-operation, wound hematoma/seroma, wound infection and subcutaneous fluids. Incision pain score was significantly different between the two groups (RR=2.15, 95%CI 1.10 to –4.23, P=0.03); and the duration of hospital stay was significantly prolonged in the drainage group (SMD=0.79, 95%CI 0.38 to –1.20, I2=93%, P=0.000 2). Conclusion The evidence shows that drainage after thyroid and parathyroid surgery can not significantly reduce the incidence of postoperative complications; but increase the duration of hospital stay. Current evidence is based on the circumstance of non-substernal goiter surgery, normal coagulation indexes and non neck lymphadenectomy, which does not apply to the conclusion of this study. It is suggested that this issue should be further studied in the future due to the lack of high-quality, multi-center and large-scale RCTs.
To investigate the influence of the preload and supporting stiffness on the hearing compensation performance of round window stimulation, a coupling finite model composed of a human ear, an actuator and a support was established. This model was constructed based on a complete set of micro-computed tomography (Micro-CT) images of a healthy adult’s right ear by reverse engineering technology. The validity of the model was verified by comparing the model’s calculated results with experimental data. Based on this model, we applied different amplitude preloads on the actuator, and changed the support’s stiffness. Then, the influences of the actuator’s preload and the support’s stiffness were analyzed by comparing the corresponding displacements of the basilar membrane. The results show that after applying a preload on the actuator, its hearing compensation performance was increased at the middle and high frequencies, but was deteriorated at low frequencies; besides, compared with using the fascia as the actuator’s support in clinical practice, utilizing the titanium alloy to fabricate the support would enhance the hearing compensation performance of the round window stimulation in the whole frequency range.
In order to study the influence of tympanic membrane lesion and ossicular erosion caused by otitis media on the hearing compensation performance of round-window stimulation, a human ear finite element model including cochlear asymmetric structure was established by computed tomography (CT) technique and reverse engineering technique. The reliability of the model was verified by comparing with the published experimental data. Based on this model, the tympanic membrane lesion and ossicular erosion caused by otitis media were simulated by changing the corresponding tissue structure. Besides, these simulated diseases’ effects on the round-window stimulation were studied by comparing the corresponding basilar-membrane’s displacement at the frequency-dependent characteristic position. The results show that the thickening and the hardening of the tympanic membrane mainly deteriorated the hearing compensation performance of round-window stimulation in the low frequency; tympanic membrane perforation and the minor erosion of ossicle with ossicular chain connected slightly effected the hearing compensation performance of round-window stimulation. Whereas, different from the influence of the aforementioned lesions, the ossicular erosion involving the ossicular chain detachment increased its influence on performance of round-window stimulation at the low frequency. Therefore, the effect of otitis media on the hearing compensation performance of round-window stimulation should be considered comprehensively when designing its actuator, especially the low-frequency deterioration caused by the thickening and the hardening of the tympanic membrane; the actuator’s low-frequency output should be enhanced accordingly to ensure its postoperative hearing compensation performance.
ObjectiveTo investigate the current research status and its developing trend of Crohn’s disease (CD) in Chinese journals in the past 40 years, and to provide reference for future research on CD.MethodsWith “Crohn’s disease” as the retrieval word, the literature about CD published from January 1978 to December 2017 were retrieved in the SinoMed database. The distributions of publication dates, journals, research institutions, and regions of literature were analyzed by EndNote, Excel, MySQL, and GraphPad Prism softwares.ResultsA total of 2 140 papers matched the searching criteria, including 1 391 papers published in the core journals. The number of papers increased by year, especially in the past 20 years, the growth rate of the total number of papers every 5 years was 96.67%, 202.54%, 85.15%, and 29.35%, respectively. A total of 152 papers met the criteria of evidence-based documents, and the proportion of evidence-based articles in the total papers every 5 years was 2.54%, 3.92%, 4.69%, and 12.16%, respectively. In the respect of region distribution of literature, the first addresses of 1 060 papers were in East China, accounting for 50.36% of the total number of papers. Jiangsu Province, Guangdong Province, Shanghai, Zhejiang Province, and Beijing had published a total of 1 257 papers, accounting for 59.71% of the total number of papers. In our research field, most of the studies were conducted by teaching hospitals.ConclusionsIn the past 40 years, the output of research on CD increased significantly in China. The proportion of evidence-based articles has increased, while the number of evidence-based research still needs to be improved. The regional distribution of literature was unbalanced, and teaching hospitals played a vital role in the research field.